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update: update zlib to version 1.2.8 ( see https://github.com/assimp/assimp/issues/134 ) 

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
pull/171/head
Kim Kulling 2013-10-14 19:27:40 +02:00
parent a5667ada9c
commit e88fcb27bf
32 changed files with 4837 additions and 562 deletions
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194
contrib/zlib/CMakeLists.txt
View File

@ -1,3 +1,25 @@
cmake_minimum_required(VERSION 2.4.4)
set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS ON)
project(zlib C)
set(VERSION "1.2.8")
option(ASM686 "Enable building i686 assembly implementation")
option(AMD64 "Enable building amd64 assembly implementation")
set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
set(INSTALL_INC_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
set(INSTALL_MAN_DIR "${CMAKE_INSTALL_PREFIX}/share/man" CACHE PATH "Installation directory for manual pages")
set(INSTALL_PKGCONFIG_DIR "${CMAKE_INSTALL_PREFIX}/share/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
include(CheckTypeSize)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckCSourceCompiles)
enable_testing()
check_include_file(sys/types.h HAVE_SYS_TYPES_H) check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file(stdint.h HAVE_STDINT_H) check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(stddef.h HAVE_STDDEF_H) check_include_file(stddef.h HAVE_STDDEF_H)
@ -18,7 +40,6 @@ endif()
if(HAVE_STDDEF_H) if(HAVE_STDDEF_H)
list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H) list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDDEF_H)
endif() endif()
check_type_size(off64_t OFF64_T) check_type_size(off64_t OFF64_T)
if(HAVE_OFF64_T) if(HAVE_OFF64_T)
add_definitions(-D_LARGEFILE64_SOURCE=1) add_definitions(-D_LARGEFILE64_SOURCE=1)
@ -42,22 +63,27 @@ if(MSVC)
set(CMAKE_DEBUG_POSTFIX "d") set(CMAKE_DEBUG_POSTFIX "d")
add_definitions(-D_CRT_SECURE_NO_DEPRECATE) add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE) add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
include_directories(${CMAKE_CURRENT_SOURCE_DIR})
endif() endif()
if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR) if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
# If we're doing an out of source build and the user has a zconf.h # If we're doing an out of source build and the user has a zconf.h
# in their source tree... # in their source tree...
if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h) if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h)
message(FATAL_ERROR message(STATUS "Renaming")
"You must remove ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h " message(STATUS " ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h")
"from the source tree. This file is included with zlib " message(STATUS "to 'zconf.h.included' because this file is included with zlib")
"but CMake generates this file for you automatically " message(STATUS "but CMake generates it automatically in the build directory.")
"in the build directory.") file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.included)
endif() endif()
endif() endif()
#configure_file(${CMAKE_CURRENT_SOURCE_DIR}/zconf.in.h ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h @ONLY) set(ZLIB_PC ${CMAKE_CURRENT_BINARY_DIR}/zlib.pc)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}) configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zlib.pc.cmakein
${ZLIB_PC} @ONLY)
configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/zconf.h.cmakein
${CMAKE_CURRENT_BINARY_DIR}/zconf.h @ONLY)
include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR})
#============================================================================ #============================================================================
@ -65,25 +91,101 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
#============================================================================ #============================================================================
set(ZLIB_PUBLIC_HDRS set(ZLIB_PUBLIC_HDRS
${CMAKE_CURRENT_SOURCE_DIR}/zconf.h ${CMAKE_CURRENT_BINARY_DIR}/zconf.h
zlib.h zlib.h
) )
set(ZLIB_PRIVATE_HDRS set(ZLIB_PRIVATE_HDRS
crc32.h deflate.h inffast.h inffixed.h inflate.h inftrees.h trees.h zconf.h zlib.h zutil.h crc32.h
deflate.h
gzguts.h
inffast.h
inffixed.h
inflate.h
inftrees.h
trees.h
zutil.h
) )
set(ZLIB_SRCS set(ZLIB_SRCS
adler32.c compress.c crc32.c deflate.c inffast.c inflate.c inftrees.c trees.c zutil.c adler32.c
compress.c
crc32.c
deflate.c
gzclose.c
gzlib.c
gzread.c
gzwrite.c
inflate.c
infback.c
inftrees.c
inffast.c
trees.c
uncompr.c
zutil.c
) )
if(NOT MINGW)
set(ZLIB_DLL_SRCS
win32/zlib1.rc # If present will override custom build rule below.
)
endif()
if(CMAKE_COMPILER_IS_GNUCC)
if(ASM686)
set(ZLIB_ASMS contrib/asm686/match.S)
elseif (AMD64)
set(ZLIB_ASMS contrib/amd64/amd64-match.S)
endif ()
if(ZLIB_ASMS)
add_definitions(-DASMV)
set_source_files_properties(${ZLIB_ASMS} PROPERTIES LANGUAGE C COMPILE_FLAGS -DNO_UNDERLINE)
endif()
endif()
if(MSVC)
if(ASM686)
ENABLE_LANGUAGE(ASM_MASM)
set(ZLIB_ASMS
contrib/masmx86/inffas32.asm
contrib/masmx86/match686.asm
)
elseif (AMD64)
ENABLE_LANGUAGE(ASM_MASM)
set(ZLIB_ASMS
contrib/masmx64/gvmat64.asm
contrib/masmx64/inffasx64.asm
)
endif()
if(ZLIB_ASMS)
add_definitions(-DASMV -DASMINF)
endif()
endif()
# parse the full version number from zlib.h and include in ZLIB_FULL_VERSION # parse the full version number from zlib.h and include in ZLIB_FULL_VERSION
file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents) file(READ ${CMAKE_CURRENT_SOURCE_DIR}/zlib.h _zlib_h_contents)
string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([0-9A-Za-z.]+)\".*" string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([-0-9A-Za-z.]+)\".*"
"\\1" ZLIB_FULL_VERSION ${_zlib_h_contents}) "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
add_library(zlib STATIC ${ZLIB_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS}) if(MINGW)
set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL COMPILE_FLAGS "${EXTRA_COMPILE_FLAGS}") # This gets us DLL resource information when compiling on MinGW.
if(NOT CMAKE_RC_COMPILER)
set(CMAKE_RC_COMPILER windres.exe)
endif()
add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
COMMAND ${CMAKE_RC_COMPILER}
-D GCC_WINDRES
-I ${CMAKE_CURRENT_SOURCE_DIR}
-I ${CMAKE_CURRENT_BINARY_DIR}
-o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
-i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
endif(MINGW)
add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
set_target_properties(zlib PROPERTIES SOVERSION 1) set_target_properties(zlib PROPERTIES SOVERSION 1)
if(NOT CYGWIN) if(NOT CYGWIN)
@ -99,43 +201,49 @@ endif()
if(UNIX) if(UNIX)
# On unix-like platforms the library is almost always called libz # On unix-like platforms the library is almost always called libz
set_target_properties(zlib PROPERTIES OUTPUT_NAME z) set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
if(NOT APPLE)
set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
endif()
elseif(BUILD_SHARED_LIBS AND WIN32) elseif(BUILD_SHARED_LIBS AND WIN32)
# Creates zlib1.dll when building shared library version # Creates zlib1.dll when building shared library version
set_target_properties(zlib PROPERTIES SUFFIX "1.dll") set_target_properties(zlib PROPERTIES SUFFIX "1.dll")
endif() endif()
#if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL ) if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
# install(TARGETS zlib install(TARGETS zlib zlibstatic
# RUNTIME DESTINATION bin RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
# ARCHIVE DESTINATION lib ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
# LIBRARY DESTINATION lib ) LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
#endif() endif()
#if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL ) if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
# install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION include) install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")
#endif() endif()
#if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL ) if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
# install(FILES zlib.3 DESTINATION share/man/man3) install(FILES zlib.3 DESTINATION "${INSTALL_MAN_DIR}/man3")
#endif() endif()
if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
install(FILES ${ZLIB_PC} DESTINATION "${INSTALL_PKGCONFIG_DIR}")
endif()
#============================================================================ #============================================================================
# Example binaries # Example binaries
#============================================================================ #============================================================================
#add_executable(example example.c) #add_executable(example test/example.c)
#target_link_libraries(example zlib) #target_link_libraries(example zlib)
#add_test(example example) #add_test(example example)
#
#add_executable(minigzip minigzip.c) #add_executable(minigzip test/minigzip.c)
#target_link_libraries(minigzip zlib) #target_link_libraries(minigzip zlib)
#
#if(HAVE_OFF64_T) if(HAVE_OFF64_T)
# add_executable(example64 example.c) add_executable(example64 test/example.c)
# target_link_libraries(example64 zlib) target_link_libraries(example64 zlib)
# set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64") set_target_properties(example64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
# add_test(example64 example64) add_test(example64 example64)
#
# add_executable(minigzip64 minigzip.c) add_executable(minigzip64 test/minigzip.c)
# target_link_libraries(minigzip64 zlib) target_link_libraries(minigzip64 zlib)
# set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64") set_target_properties(minigzip64 PROPERTIES COMPILE_FLAGS "-D_FILE_OFFSET_BITS=64")
#endif() endif()

24
contrib/zlib/README
View File

@ -1,22 +1,22 @@
ZLIB DATA COMPRESSION LIBRARY ZLIB DATA COMPRESSION LIBRARY
zlib 1.2.5 is a general purpose data compression library. All the code is zlib 1.2.8 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files (Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format) http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
and rfc1952.txt (gzip format). rfc1952 (gzip format).
All functions of the compression library are documented in the file zlib.h All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example (volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
of the library is given in the file example.c which also tests that the library of the library is given in the file test/example.c which also tests that
is working correctly. Another example is given in the file minigzip.c. The the library is working correctly. Another example is given in the file
compression library itself is composed of all source files except example.c and test/minigzip.c. The compression library itself is composed of all source
minigzip.c. files in the root directory.
To compile all files and run the test program, follow the instructions given at To compile all files and run the test program, follow the instructions given at
the top of Makefile.in. In short "./configure; make test", and if that goes the top of Makefile.in. In short "./configure; make test", and if that goes
well, "make install" should work for most flavors of Unix. For Windows, use one well, "make install" should work for most flavors of Unix. For Windows, use
of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use
make_vms.com. make_vms.com.
Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
@ -31,7 +31,7 @@ Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
issue of Dr. Dobb's Journal; a copy of the article is available at issue of Dr. Dobb's Journal; a copy of the article is available at
http://marknelson.us/1997/01/01/zlib-engine/ . http://marknelson.us/1997/01/01/zlib-engine/ .
The changes made in version 1.2.5 are documented in the file ChangeLog. The changes made in version 1.2.8 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory contrib/ . Unsupported third party contributions are provided in directory contrib/ .
@ -44,7 +44,7 @@ http://search.cpan.org/~pmqs/IO-Compress-Zlib/ .
A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
available in Python 1.5 and later versions, see available in Python 1.5 and later versions, see
http://www.python.org/doc/lib/module-zlib.html . http://docs.python.org/library/zlib.html .
zlib is built into tcl: http://wiki.tcl.tk/4610 . zlib is built into tcl: http://wiki.tcl.tk/4610 .
@ -84,7 +84,7 @@ Acknowledgments:
Copyright notice: Copyright notice:
(C) 1995-2010 Jean-loup Gailly and Mark Adler (C) 1995-2013 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages warranty. In no event will the authors be held liable for any damages

68
contrib/zlib/adler32.c
View File

@ -1,5 +1,5 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream /* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2007 Mark Adler * Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -9,9 +9,9 @@
#define local static #define local static
local uLong adler32_combine_(uLong adler1, uLong adler2, z_off64_t len2); local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
#define BASE 65521UL /* largest prime smaller than 65536 */ #define BASE 65521 /* largest prime smaller than 65536 */
#define NMAX 5552 #define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
@ -21,39 +21,44 @@ local uLong adler32_combine_(uLong adler1, uLong adler2, z_off64_t len2);
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4); #define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8); #define DO16(buf) DO8(buf,0); DO8(buf,8);
/* use NO_DIVIDE if your processor does not do division in hardware */ /* use NO_DIVIDE if your processor does not do division in hardware --
try it both ways to see which is faster */
#ifdef NO_DIVIDE #ifdef NO_DIVIDE
# define MOD(a) \ /* note that this assumes BASE is 65521, where 65536 % 65521 == 15
(thank you to John Reiser for pointing this out) */
# define CHOP(a) \
do { \ do { \
if (a >= (BASE << 16)) a -= (BASE << 16); \ unsigned long tmp = a >> 16; \
if (a >= (BASE << 15)) a -= (BASE << 15); \ a &= 0xffffUL; \
if (a >= (BASE << 14)) a -= (BASE << 14); \ a += (tmp << 4) - tmp; \
if (a >= (BASE << 13)) a -= (BASE << 13); \ } while (0)
if (a >= (BASE << 12)) a -= (BASE << 12); \ # define MOD28(a) \
if (a >= (BASE << 11)) a -= (BASE << 11); \ do { \
if (a >= (BASE << 10)) a -= (BASE << 10); \ CHOP(a); \
if (a >= (BASE << 9)) a -= (BASE << 9); \
if (a >= (BASE << 8)) a -= (BASE << 8); \
if (a >= (BASE << 7)) a -= (BASE << 7); \
if (a >= (BASE << 6)) a -= (BASE << 6); \
if (a >= (BASE << 5)) a -= (BASE << 5); \
if (a >= (BASE << 4)) a -= (BASE << 4); \
if (a >= (BASE << 3)) a -= (BASE << 3); \
if (a >= (BASE << 2)) a -= (BASE << 2); \
if (a >= (BASE << 1)) a -= (BASE << 1); \
if (a >= BASE) a -= BASE; \ if (a >= BASE) a -= BASE; \
} while (0) } while (0)
# define MOD4(a) \ # define MOD(a) \
do { \ do { \
if (a >= (BASE << 4)) a -= (BASE << 4); \ CHOP(a); \
if (a >= (BASE << 3)) a -= (BASE << 3); \ MOD28(a); \
if (a >= (BASE << 2)) a -= (BASE << 2); \ } while (0)
if (a >= (BASE << 1)) a -= (BASE << 1); \ # define MOD63(a) \
do { /* this assumes a is not negative */ \
z_off64_t tmp = a >> 32; \
a &= 0xffffffffL; \
a += (tmp << 8) - (tmp << 5) + tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
if (a >= BASE) a -= BASE; \ if (a >= BASE) a -= BASE; \
} while (0) } while (0)
#else #else
# define MOD(a) a %= BASE # define MOD(a) a %= BASE
# define MOD4(a) a %= BASE # define MOD28(a) a %= BASE
# define MOD63(a) a %= BASE
#endif #endif
/* ========================================================================= */ /* ========================================================================= */
@ -92,7 +97,7 @@ uLong ZEXPORT adler32(adler, buf, len)
} }
if (adler >= BASE) if (adler >= BASE)
adler -= BASE; adler -= BASE;
MOD4(sum2); /* only added so many BASE's */ MOD28(sum2); /* only added so many BASE's */
return adler | (sum2 << 16); return adler | (sum2 << 16);
} }
@ -137,8 +142,13 @@ local uLong adler32_combine_(adler1, adler2, len2)
unsigned long sum2; unsigned long sum2;
unsigned rem; unsigned rem;
/* for negative len, return invalid adler32 as a clue for debugging */
if (len2 < 0)
return 0xffffffffUL;
/* the derivation of this formula is left as an exercise for the reader */ /* the derivation of this formula is left as an exercise for the reader */
rem = (unsigned)(len2 % BASE); MOD63(len2); /* assumes len2 >= 0 */
rem = (unsigned)len2;
sum1 = adler1 & 0xffff; sum1 = adler1 & 0xffff;
sum2 = rem * sum1; sum2 = rem * sum1;
MOD(sum2); MOD(sum2);

2
contrib/zlib/compress.c
View File

@ -29,7 +29,7 @@ int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
z_stream stream; z_stream stream;
int err; int err;
stream.next_in = (Bytef*)source; stream.next_in = (z_const Bytef *)source;
stream.avail_in = (uInt)sourceLen; stream.avail_in = (uInt)sourceLen;
#ifdef MAXSEG_64K #ifdef MAXSEG_64K
/* Check for source > 64K on 16-bit machine: */ /* Check for source > 64K on 16-bit machine: */

83
contrib/zlib/crc32.c
View File

@ -1,5 +1,5 @@
/* crc32.c -- compute the CRC-32 of a data stream /* crc32.c -- compute the CRC-32 of a data stream
* Copyright (C) 1995-2006, 2010 Mark Adler * Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
* *
* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
@ -17,6 +17,8 @@
of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
first call get_crc_table() to initialize the tables before allowing more than first call get_crc_table() to initialize the tables before allowing more than
one thread to use crc32(). one thread to use crc32().
DYNAMIC_CRC_TABLE and MAKECRCH can be #defined to write out crc32.h.
*/ */
#ifdef MAKECRCH #ifdef MAKECRCH
@ -30,31 +32,11 @@
#define local static #define local static
/* Find a four-byte integer type for crc32_little() and crc32_big(). */
#ifndef NOBYFOUR
# ifdef STDC /* need ANSI C limits.h to determine sizes */
# include <limits.h>
# define BYFOUR
# if (UINT_MAX == 0xffffffffUL)
typedef unsigned int u4;
# else
# if (ULONG_MAX == 0xffffffffUL)
typedef unsigned long u4;
# else
# if (USHRT_MAX == 0xffffffffUL)
typedef unsigned short u4;
# else
# undef BYFOUR /* can't find a four-byte integer type! */
# endif
# endif
# endif
# endif /* STDC */
#endif /* !NOBYFOUR */
/* Definitions for doing the crc four data bytes at a time. */ /* Definitions for doing the crc four data bytes at a time. */
#if !defined(NOBYFOUR) && defined(Z_U4)
# define BYFOUR
#endif
#ifdef BYFOUR #ifdef BYFOUR
# define REV(w) ((((w)>>24)&0xff)+(((w)>>8)&0xff00)+ \
(((w)&0xff00)<<8)+(((w)&0xff)<<24))
local unsigned long crc32_little OF((unsigned long, local unsigned long crc32_little OF((unsigned long,
const unsigned char FAR *, unsigned)); const unsigned char FAR *, unsigned));
local unsigned long crc32_big OF((unsigned long, local unsigned long crc32_big OF((unsigned long,
@ -68,16 +50,16 @@
local unsigned long gf2_matrix_times OF((unsigned long *mat, local unsigned long gf2_matrix_times OF((unsigned long *mat,
unsigned long vec)); unsigned long vec));
local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat)); local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
local uLong crc32_combine_(uLong crc1, uLong crc2, z_off64_t len2); local uLong crc32_combine_ OF((uLong crc1, uLong crc2, z_off64_t len2));
#ifdef DYNAMIC_CRC_TABLE #ifdef DYNAMIC_CRC_TABLE
local volatile int crc_table_empty = 1; local volatile int crc_table_empty = 1;
local unsigned long FAR crc_table[TBLS][256]; local z_crc_t FAR crc_table[TBLS][256];
local void make_crc_table OF((void)); local void make_crc_table OF((void));
#ifdef MAKECRCH #ifdef MAKECRCH
local void write_table OF((FILE *, const unsigned long FAR *)); local void write_table OF((FILE *, const z_crc_t FAR *));
#endif /* MAKECRCH */ #endif /* MAKECRCH */
/* /*
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial: Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
@ -107,9 +89,9 @@ local void make_crc_table OF((void));
*/ */
local void make_crc_table() local void make_crc_table()
{ {
unsigned long c; z_crc_t c;
int n, k; int n, k;
unsigned long poly; /* polynomial exclusive-or pattern */ z_crc_t poly; /* polynomial exclusive-or pattern */
/* terms of polynomial defining this crc (except x^32): */ /* terms of polynomial defining this crc (except x^32): */
static volatile int first = 1; /* flag to limit concurrent making */ static volatile int first = 1; /* flag to limit concurrent making */
static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
@ -121,13 +103,13 @@ local void make_crc_table()
first = 0; first = 0;
/* make exclusive-or pattern from polynomial (0xedb88320UL) */ /* make exclusive-or pattern from polynomial (0xedb88320UL) */
poly = 0UL; poly = 0;
for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++) for (n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++)
poly |= 1UL << (31 - p[n]); poly |= (z_crc_t)1 << (31 - p[n]);
/* generate a crc for every 8-bit value */ /* generate a crc for every 8-bit value */
for (n = 0; n < 256; n++) { for (n = 0; n < 256; n++) {
c = (unsigned long)n; c = (z_crc_t)n;
for (k = 0; k < 8; k++) for (k = 0; k < 8; k++)
c = c & 1 ? poly ^ (c >> 1) : c >> 1; c = c & 1 ? poly ^ (c >> 1) : c >> 1;
crc_table[0][n] = c; crc_table[0][n] = c;
@ -138,11 +120,11 @@ local void make_crc_table()
and then the byte reversal of those as well as the first table */ and then the byte reversal of those as well as the first table */
for (n = 0; n < 256; n++) { for (n = 0; n < 256; n++) {
c = crc_table[0][n]; c = crc_table[0][n];
crc_table[4][n] = REV(c); crc_table[4][n] = ZSWAP32(c);
for (k = 1; k < 4; k++) { for (k = 1; k < 4; k++) {
c = crc_table[0][c & 0xff] ^ (c >> 8); c = crc_table[0][c & 0xff] ^ (c >> 8);
crc_table[k][n] = c; crc_table[k][n] = c;
crc_table[k + 4][n] = REV(c); crc_table[k + 4][n] = ZSWAP32(c);
} }
} }
#endif /* BYFOUR */ #endif /* BYFOUR */
@ -164,7 +146,7 @@ local void make_crc_table()
if (out == NULL) return; if (out == NULL) return;
fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n"); fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
fprintf(out, " * Generated automatically by crc32.c\n */\n\n"); fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
fprintf(out, "local const unsigned long FAR "); fprintf(out, "local const z_crc_t FAR ");
fprintf(out, "crc_table[TBLS][256] =\n{\n {\n"); fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
write_table(out, crc_table[0]); write_table(out, crc_table[0]);
# ifdef BYFOUR # ifdef BYFOUR
@ -184,12 +166,13 @@ local void make_crc_table()
#ifdef MAKECRCH #ifdef MAKECRCH
local void write_table(out, table) local void write_table(out, table)
FILE *out; FILE *out;
const unsigned long FAR *table; const z_crc_t FAR *table;
{ {
int n; int n;
for (n = 0; n < 256; n++) for (n = 0; n < 256; n++)
fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n], fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ",
(unsigned long)(table[n]),
n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", ")); n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
} }
#endif /* MAKECRCH */ #endif /* MAKECRCH */
@ -204,13 +187,13 @@ local void write_table(out, table)
/* ========================================================================= /* =========================================================================
* This function can be used by asm versions of crc32() * This function can be used by asm versions of crc32()
*/ */
const unsigned long FAR * ZEXPORT get_crc_table() const z_crc_t FAR * ZEXPORT get_crc_table()
{ {
#ifdef DYNAMIC_CRC_TABLE #ifdef DYNAMIC_CRC_TABLE
if (crc_table_empty) if (crc_table_empty)
make_crc_table(); make_crc_table();
#endif /* DYNAMIC_CRC_TABLE */ #endif /* DYNAMIC_CRC_TABLE */
return (const unsigned long FAR *)crc_table; return (const z_crc_t FAR *)crc_table;
} }
/* ========================================================================= */ /* ========================================================================= */
@ -232,7 +215,7 @@ unsigned long ZEXPORT crc32(crc, buf, len)
#ifdef BYFOUR #ifdef BYFOUR
if (sizeof(void *) == sizeof(ptrdiff_t)) { if (sizeof(void *) == sizeof(ptrdiff_t)) {
u4 endian; z_crc_t endian;
endian = 1; endian = 1;
if (*((unsigned char *)(&endian))) if (*((unsigned char *)(&endian)))
@ -266,17 +249,17 @@ local unsigned long crc32_little(crc, buf, len)
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; unsigned len;
{ {
register u4 c; register z_crc_t c;
register const u4 FAR *buf4; register const z_crc_t FAR *buf4;
c = (u4)crc; c = (z_crc_t)crc;
c = ~c; c = ~c;
while (len && ((ptrdiff_t)buf & 3)) { while (len && ((ptrdiff_t)buf & 3)) {
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8); c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
len--; len--;
} }
buf4 = (const u4 FAR *)(const void FAR *)buf; buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
while (len >= 32) { while (len >= 32) {
DOLIT32; DOLIT32;
len -= 32; len -= 32;
@ -306,17 +289,17 @@ local unsigned long crc32_big(crc, buf, len)
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; unsigned len;
{ {
register u4 c; register z_crc_t c;
register const u4 FAR *buf4; register const z_crc_t FAR *buf4;
c = REV((u4)crc); c = ZSWAP32((z_crc_t)crc);
c = ~c; c = ~c;
while (len && ((ptrdiff_t)buf & 3)) { while (len && ((ptrdiff_t)buf & 3)) {
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8); c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
len--; len--;
} }
buf4 = (const u4 FAR *)(const void FAR *)buf; buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
buf4--; buf4--;
while (len >= 32) { while (len >= 32) {
DOBIG32; DOBIG32;
@ -333,7 +316,7 @@ local unsigned long crc32_big(crc, buf, len)
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8); c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
} while (--len); } while (--len);
c = ~c; c = ~c;
return (unsigned long)(REV(c)); return (unsigned long)(ZSWAP32(c));
} }
#endif /* BYFOUR */ #endif /* BYFOUR */

2
contrib/zlib/crc32.h
View File

@ -2,7 +2,7 @@
* Generated automatically by crc32.c * Generated automatically by crc32.c
*/ */
local const unsigned long FAR crc_table[TBLS][256] = local const z_crc_t FAR crc_table[TBLS][256] =
{ {
{ {
0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL, 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,

261
contrib/zlib/deflate.c
View File

@ -1,5 +1,5 @@
/* deflate.c -- compress data using the deflation algorithm /* deflate.c -- compress data using the deflation algorithm
* Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -37,7 +37,7 @@
* REFERENCES * REFERENCES
* *
* Deutsch, L.P.,"DEFLATE Compressed Data Format Specification". * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
* Available in http://www.ietf.org/rfc/rfc1951.txt * Available in http://tools.ietf.org/html/rfc1951
* *
* A description of the Rabin and Karp algorithm is given in the book * A description of the Rabin and Karp algorithm is given in the book
* "Algorithms" by R. Sedgewick, Addison-Wesley, p252. * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
@ -52,7 +52,7 @@
#include "deflate.h" #include "deflate.h"
const char deflate_copyright[] = const char deflate_copyright[] =
" deflate 1.2.5 Copyright 1995-2010 Jean-loup Gailly and Mark Adler "; " deflate 1.2.8 Copyright 1995-2013 Jean-loup Gailly and Mark Adler ";
/* /*
If you use the zlib library in a product, an acknowledgment is welcome If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot in the documentation of your product. If for some reason you cannot
@ -155,6 +155,9 @@ local const config configuration_table[10] = {
struct static_tree_desc_s {int dummy;}; /* for buggy compilers */ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
#endif #endif
/* rank Z_BLOCK between Z_NO_FLUSH and Z_PARTIAL_FLUSH */
#define RANK(f) (((f) << 1) - ((f) > 4 ? 9 : 0))
/* =========================================================================== /* ===========================================================================
* Update a hash value with the given input byte * Update a hash value with the given input byte
* IN assertion: all calls to to UPDATE_HASH are made with consecutive * IN assertion: all calls to to UPDATE_HASH are made with consecutive
@ -235,10 +238,19 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
strm->msg = Z_NULL; strm->msg = Z_NULL;
if (strm->zalloc == (alloc_func)0) { if (strm->zalloc == (alloc_func)0) {
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zalloc = zcalloc; strm->zalloc = zcalloc;
strm->opaque = (voidpf)0; strm->opaque = (voidpf)0;
#endif
} }
if (strm->zfree == (free_func)0) strm->zfree = zcfree; if (strm->zfree == (free_func)0)
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zfree = zcfree;
#endif
#ifdef FASTEST #ifdef FASTEST
if (level != 0) level = 1; if (level != 0) level = 1;
@ -293,7 +305,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL || if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
s->pending_buf == Z_NULL) { s->pending_buf == Z_NULL) {
s->status = FINISH_STATE; s->status = FINISH_STATE;
strm->msg = (char*)ERR_MSG(Z_MEM_ERROR); strm->msg = ERR_MSG(Z_MEM_ERROR);
deflateEnd (strm); deflateEnd (strm);
return Z_MEM_ERROR; return Z_MEM_ERROR;
} }
@ -314,43 +326,70 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
uInt dictLength; uInt dictLength;
{ {
deflate_state *s; deflate_state *s;
uInt length = dictLength; uInt str, n;
uInt n; int wrap;
IPos hash_head = 0; unsigned avail;
z_const unsigned char *next;
if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL || if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL)
strm->state->wrap == 2 || return Z_STREAM_ERROR;
(strm->state->wrap == 1 && strm->state->status != INIT_STATE)) s = strm->state;
wrap = s->wrap;
if (wrap == 2 || (wrap == 1 && s->status != INIT_STATE) || s->lookahead)
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
s = strm->state; /* when using zlib wrappers, compute Adler-32 for provided dictionary */
if (s->wrap) if (wrap == 1)
strm->adler = adler32(strm->adler, dictionary, dictLength); strm->adler = adler32(strm->adler, dictionary, dictLength);
s->wrap = 0; /* avoid computing Adler-32 in read_buf */
if (length < MIN_MATCH) return Z_OK; /* if dictionary would fill window, just replace the history */
if (length > s->w_size) { if (dictLength >= s->w_size) {
length = s->w_size; if (wrap == 0) { /* already empty otherwise */
dictionary += dictLength - length; /* use the tail of the dictionary */ CLEAR_HASH(s);
s->strstart = 0;
s->block_start = 0L;
s->insert = 0;
}
dictionary += dictLength - s->w_size; /* use the tail */
dictLength = s->w_size;
} }
zmemcpy(s->window, dictionary, length);
s->strstart = length;
s->block_start = (long)length;
/* Insert all strings in the hash table (except for the last two bytes). /* insert dictionary into window and hash */
* s->lookahead stays null, so s->ins_h will be recomputed at the next avail = strm->avail_in;
* call of fill_window. next = strm->next_in;
*/ strm->avail_in = dictLength;
s->ins_h = s->window[0]; strm->next_in = (z_const Bytef *)dictionary;
UPDATE_HASH(s, s->ins_h, s->window[1]); fill_window(s);
for (n = 0; n <= length - MIN_MATCH; n++) { while (s->lookahead >= MIN_MATCH) {
INSERT_STRING(s, n, hash_head); str = s->strstart;
n = s->lookahead - (MIN_MATCH-1);
do {
UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
#ifndef FASTEST
s->prev[str & s->w_mask] = s->head[s->ins_h];
#endif
s->head[s->ins_h] = (Pos)str;
str++;
} while (--n);
s->strstart = str;
s->lookahead = MIN_MATCH-1;
fill_window(s);
} }
if (hash_head) hash_head = 0; /* to make compiler happy */ s->strstart += s->lookahead;
s->block_start = (long)s->strstart;
s->insert = s->lookahead;
s->lookahead = 0;
s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0;
strm->next_in = next;
strm->avail_in = avail;
s->wrap = wrap;
return Z_OK; return Z_OK;
} }
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflateReset (strm) int ZEXPORT deflateResetKeep (strm)
z_streamp strm; z_streamp strm;
{ {
deflate_state *s; deflate_state *s;
@ -380,11 +419,22 @@ int ZEXPORT deflateReset (strm)
s->last_flush = Z_NO_FLUSH; s->last_flush = Z_NO_FLUSH;
_tr_init(s); _tr_init(s);
lm_init(s);
return Z_OK; return Z_OK;
} }
/* ========================================================================= */
int ZEXPORT deflateReset (strm)
z_streamp strm;
{
int ret;
ret = deflateResetKeep(strm);
if (ret == Z_OK)
lm_init(strm->state);
return ret;
}
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflateSetHeader (strm, head) int ZEXPORT deflateSetHeader (strm, head)
z_streamp strm; z_streamp strm;
@ -396,15 +446,43 @@ int ZEXPORT deflateSetHeader (strm, head)
return Z_OK; return Z_OK;
} }
/* ========================================================================= */
int ZEXPORT deflatePending (strm, pending, bits)
unsigned *pending;
int *bits;
z_streamp strm;
{
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
if (pending != Z_NULL)
*pending = strm->state->pending;
if (bits != Z_NULL)
*bits = strm->state->bi_valid;
return Z_OK;
}
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflatePrime (strm, bits, value) int ZEXPORT deflatePrime (strm, bits, value)
z_streamp strm; z_streamp strm;
int bits; int bits;
int value; int value;
{ {
deflate_state *s;
int put;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
strm->state->bi_valid = bits; s = strm->state;
strm->state->bi_buf = (ush)(value & ((1 << bits) - 1)); if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
return Z_BUF_ERROR;
do {
put = Buf_size - s->bi_valid;
if (put > bits)
put = bits;
s->bi_buf |= (ush)((value & ((1 << put) - 1)) << s->bi_valid);
s->bi_valid += put;
_tr_flush_bits(s);
value >>= put;
bits -= put;
} while (bits);
return Z_OK; return Z_OK;
} }
@ -435,6 +513,8 @@ int ZEXPORT deflateParams(strm, level, strategy)
strm->total_in != 0) { strm->total_in != 0) {
/* Flush the last buffer: */ /* Flush the last buffer: */
err = deflate(strm, Z_BLOCK); err = deflate(strm, Z_BLOCK);
if (err == Z_BUF_ERROR && s->pending == 0)
err = Z_OK;
} }
if (s->level != level) { if (s->level != level) {
s->level = level; s->level = level;
@ -562,19 +642,22 @@ local void putShortMSB (s, b)
local void flush_pending(strm) local void flush_pending(strm)
z_streamp strm; z_streamp strm;
{ {
unsigned len = strm->state->pending; unsigned len;
deflate_state *s = strm->state;
_tr_flush_bits(s);
len = s->pending;
if (len > strm->avail_out) len = strm->avail_out; if (len > strm->avail_out) len = strm->avail_out;
if (len == 0) return; if (len == 0) return;
zmemcpy(strm->next_out, strm->state->pending_out, len); zmemcpy(strm->next_out, s->pending_out, len);
strm->next_out += len; strm->next_out += len;
strm->state->pending_out += len; s->pending_out += len;
strm->total_out += len; strm->total_out += len;
strm->avail_out -= len; strm->avail_out -= len;
strm->state->pending -= len; s->pending -= len;
if (strm->state->pending == 0) { if (s->pending == 0) {
strm->state->pending_out = strm->state->pending_buf; s->pending_out = s->pending_buf;
} }
} }
@ -801,7 +884,7 @@ int ZEXPORT deflate (strm, flush)
* flushes. For repeated and useless calls with Z_FINISH, we keep * flushes. For repeated and useless calls with Z_FINISH, we keep
* returning Z_STREAM_END instead of Z_BUF_ERROR. * returning Z_STREAM_END instead of Z_BUF_ERROR.
*/ */
} else if (strm->avail_in == 0 && flush <= old_flush && } else if (strm->avail_in == 0 && RANK(flush) <= RANK(old_flush) &&
flush != Z_FINISH) { flush != Z_FINISH) {
ERR_RETURN(strm, Z_BUF_ERROR); ERR_RETURN(strm, Z_BUF_ERROR);
} }
@ -850,6 +933,7 @@ int ZEXPORT deflate (strm, flush)
if (s->lookahead == 0) { if (s->lookahead == 0) {
s->strstart = 0; s->strstart = 0;
s->block_start = 0L; s->block_start = 0L;
s->insert = 0;
} }
} }
} }
@ -945,12 +1029,12 @@ int ZEXPORT deflateCopy (dest, source)
ss = source->state; ss = source->state;
zmemcpy(dest, source, sizeof(z_stream)); zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state)); ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
if (ds == Z_NULL) return Z_MEM_ERROR; if (ds == Z_NULL) return Z_MEM_ERROR;
dest->state = (struct internal_state FAR *) ds; dest->state = (struct internal_state FAR *) ds;
zmemcpy(ds, ss, sizeof(deflate_state)); zmemcpy((voidpf)ds, (voidpf)ss, sizeof(deflate_state));
ds->strm = dest; ds->strm = dest;
ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte)); ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
@ -966,8 +1050,8 @@ int ZEXPORT deflateCopy (dest, source)
} }
/* following zmemcpy do not work for 16-bit MSDOS */ /* following zmemcpy do not work for 16-bit MSDOS */
zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte)); zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos)); zmemcpy((voidpf)ds->prev, (voidpf)ss->prev, ds->w_size * sizeof(Pos));
zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos)); zmemcpy((voidpf)ds->head, (voidpf)ss->head, ds->hash_size * sizeof(Pos));
zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size); zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf); ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
@ -1001,15 +1085,15 @@ local int read_buf(strm, buf, size)
strm->avail_in -= len; strm->avail_in -= len;
zmemcpy(buf, strm->next_in, len);
if (strm->state->wrap == 1) { if (strm->state->wrap == 1) {
strm->adler = adler32(strm->adler, strm->next_in, len); strm->adler = adler32(strm->adler, buf, len);
} }
#ifdef GZIP #ifdef GZIP
else if (strm->state->wrap == 2) { else if (strm->state->wrap == 2) {
strm->adler = crc32(strm->adler, strm->next_in, len); strm->adler = crc32(strm->adler, buf, len);
} }
#endif #endif
zmemcpy(buf, strm->next_in, len);
strm->next_in += len; strm->next_in += len;
strm->total_in += len; strm->total_in += len;
@ -1036,6 +1120,7 @@ local void lm_init (s)
s->strstart = 0; s->strstart = 0;
s->block_start = 0L; s->block_start = 0L;
s->lookahead = 0; s->lookahead = 0;
s->insert = 0;
s->match_length = s->prev_length = MIN_MATCH-1; s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0; s->match_available = 0;
s->ins_h = 0; s->ins_h = 0;
@ -1310,6 +1395,8 @@ local void fill_window(s)
unsigned more; /* Amount of free space at the end of the window. */ unsigned more; /* Amount of free space at the end of the window. */
uInt wsize = s->w_size; uInt wsize = s->w_size;
Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");
do { do {
more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart); more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
@ -1362,7 +1449,7 @@ local void fill_window(s)
#endif #endif
more += wsize; more += wsize;
} }
if (s->strm->avail_in == 0) return; if (s->strm->avail_in == 0) break;
/* If there was no sliding: /* If there was no sliding:
* strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 && * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
@ -1381,12 +1468,24 @@ local void fill_window(s)
s->lookahead += n; s->lookahead += n;
/* Initialize the hash value now that we have some input: */ /* Initialize the hash value now that we have some input: */
if (s->lookahead >= MIN_MATCH) { if (s->lookahead + s->insert >= MIN_MATCH) {
s->ins_h = s->window[s->strstart]; uInt str = s->strstart - s->insert;
UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]); s->ins_h = s->window[str];
UPDATE_HASH(s, s->ins_h, s->window[str + 1]);
#if MIN_MATCH != 3 #if MIN_MATCH != 3
Call UPDATE_HASH() MIN_MATCH-3 more times Call UPDATE_HASH() MIN_MATCH-3 more times
#endif #endif
while (s->insert) {
UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
#ifndef FASTEST
s->prev[str & s->w_mask] = s->head[s->ins_h];
#endif
s->head[s->ins_h] = (Pos)str;
str++;
s->insert--;
if (s->lookahead + s->insert < MIN_MATCH)
break;
}
} }
/* If the whole input has less than MIN_MATCH bytes, ins_h is garbage, /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
* but this is not important since only literal bytes will be emitted. * but this is not important since only literal bytes will be emitted.
@ -1427,6 +1526,9 @@ local void fill_window(s)
s->high_water += init; s->high_water += init;
} }
} }
Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
"not enough room for search");
} }
/* =========================================================================== /* ===========================================================================
@ -1506,8 +1608,14 @@ local block_state deflate_stored(s, flush)
FLUSH_BLOCK(s, 0); FLUSH_BLOCK(s, 0);
} }
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = 0;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if ((long)s->strstart > s->block_start)
FLUSH_BLOCK(s, 0);
return block_done;
} }
/* =========================================================================== /* ===========================================================================
@ -1603,8 +1711,14 @@ local block_state deflate_fast(s, flush)
} }
if (bflush) FLUSH_BLOCK(s, 0); if (bflush) FLUSH_BLOCK(s, 0);
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
#ifndef FASTEST #ifndef FASTEST
@ -1728,8 +1842,14 @@ local block_state deflate_slow(s, flush)
_tr_tally_lit(s, s->window[s->strstart-1], bflush); _tr_tally_lit(s, s->window[s->strstart-1], bflush);
s->match_available = 0; s->match_available = 0;
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
#endif /* FASTEST */ #endif /* FASTEST */
@ -1749,11 +1869,11 @@ local block_state deflate_rle(s, flush)
for (;;) { for (;;) {
/* Make sure that we always have enough lookahead, except /* Make sure that we always have enough lookahead, except
* at the end of the input file. We need MAX_MATCH bytes * at the end of the input file. We need MAX_MATCH bytes
* for the longest encodable run. * for the longest run, plus one for the unrolled loop.
*/ */
if (s->lookahead < MAX_MATCH) { if (s->lookahead <= MAX_MATCH) {
fill_window(s); fill_window(s);
if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) { if (s->lookahead <= MAX_MATCH && flush == Z_NO_FLUSH) {
return need_more; return need_more;
} }
if (s->lookahead == 0) break; /* flush the current block */ if (s->lookahead == 0) break; /* flush the current block */
@ -1776,6 +1896,7 @@ local block_state deflate_rle(s, flush)
if (s->match_length > s->lookahead) if (s->match_length > s->lookahead)
s->match_length = s->lookahead; s->match_length = s->lookahead;
} }
Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
} }
/* Emit match if have run of MIN_MATCH or longer, else emit literal */ /* Emit match if have run of MIN_MATCH or longer, else emit literal */
@ -1796,8 +1917,14 @@ local block_state deflate_rle(s, flush)
} }
if (bflush) FLUSH_BLOCK(s, 0); if (bflush) FLUSH_BLOCK(s, 0);
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = 0;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
/* =========================================================================== /* ===========================================================================
@ -1829,6 +1956,12 @@ local block_state deflate_huff(s, flush)
s->strstart++; s->strstart++;
if (bflush) FLUSH_BLOCK(s, 0); if (bflush) FLUSH_BLOCK(s, 0);
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = 0;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }

12
contrib/zlib/deflate.h
View File

@ -1,5 +1,5 @@
/* deflate.h -- internal compression state /* deflate.h -- internal compression state
* Copyright (C) 1995-2010 Jean-loup Gailly * Copyright (C) 1995-2012 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -48,6 +48,9 @@
#define MAX_BITS 15 #define MAX_BITS 15
/* All codes must not exceed MAX_BITS bits */ /* All codes must not exceed MAX_BITS bits */
#define Buf_size 16
/* size of bit buffer in bi_buf */
#define INIT_STATE 42 #define INIT_STATE 42
#define EXTRA_STATE 69 #define EXTRA_STATE 69
#define NAME_STATE 73 #define NAME_STATE 73
@ -101,7 +104,7 @@ typedef struct internal_state {
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
gz_headerp gzhead; /* gzip header information to write */ gz_headerp gzhead; /* gzip header information to write */
uInt gzindex; /* where in extra, name, or comment */ uInt gzindex; /* where in extra, name, or comment */
Byte method; /* STORED (for zip only) or DEFLATED */ Byte method; /* can only be DEFLATED */
int last_flush; /* value of flush param for previous deflate call */ int last_flush; /* value of flush param for previous deflate call */
/* used by deflate.c: */ /* used by deflate.c: */
@ -188,7 +191,7 @@ typedef struct internal_state {
int nice_match; /* Stop searching when current match exceeds this */ int nice_match; /* Stop searching when current match exceeds this */
/* used by trees.c: */ /* used by trees.c: */
/* Didn't use ct_data typedef below to supress compiler warning */ /* Didn't use ct_data typedef below to suppress compiler warning */
struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */ struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */ struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */ struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
@ -244,7 +247,7 @@ typedef struct internal_state {
ulg opt_len; /* bit length of current block with optimal trees */ ulg opt_len; /* bit length of current block with optimal trees */
ulg static_len; /* bit length of current block with static trees */ ulg static_len; /* bit length of current block with static trees */
uInt matches; /* number of string matches in current block */ uInt matches; /* number of string matches in current block */
int last_eob_len; /* bit length of EOB code for last block */ uInt insert; /* bytes at end of window left to insert */
#ifdef DEBUG #ifdef DEBUG
ulg compressed_len; /* total bit length of compressed file mod 2^32 */ ulg compressed_len; /* total bit length of compressed file mod 2^32 */
@ -294,6 +297,7 @@ void ZLIB_INTERNAL _tr_init OF((deflate_state *s));
int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc)); int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf, void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf,
ulg stored_len, int last)); ulg stored_len, int last));
void ZLIB_INTERNAL _tr_flush_bits OF((deflate_state *s));
void ZLIB_INTERNAL _tr_align OF((deflate_state *s)); void ZLIB_INTERNAL _tr_align OF((deflate_state *s));
void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf, void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
ulg stored_len, int last)); ulg stored_len, int last));

25
contrib/zlib/gzclose.c 100644
View File

@ -0,0 +1,25 @@
/* gzclose.c -- zlib gzclose() function
* Copyright (C) 2004, 2010 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
/* gzclose() is in a separate file so that it is linked in only if it is used.
That way the other gzclose functions can be used instead to avoid linking in
unneeded compression or decompression routines. */
int ZEXPORT gzclose(file)
gzFile file;
{
#ifndef NO_GZCOMPRESS
gz_statep state;
if (file == NULL)
return Z_STREAM_ERROR;
state = (gz_statep)file;
return state->mode == GZ_READ ? gzclose_r(file) : gzclose_w(file);
#else
return gzclose_r(file);
#endif
}

209
contrib/zlib/gzguts.h 100644
View File

@ -0,0 +1,209 @@
/* gzguts.h -- zlib internal header definitions for gz* operations
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#ifdef _LARGEFILE64_SOURCE
# ifndef _LARGEFILE_SOURCE
# define _LARGEFILE_SOURCE 1
# endif
# ifdef _FILE_OFFSET_BITS
# undef _FILE_OFFSET_BITS
# endif
#endif
#ifdef HAVE_HIDDEN
# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
# define ZLIB_INTERNAL
#endif
#include <stdio.h>
#include "zlib.h"
#ifdef STDC
# include <string.h>
# include <stdlib.h>
# include <limits.h>
#endif
#include <fcntl.h>
#ifdef _WIN32
# include <stddef.h>
#endif
#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
# include <io.h>
#endif
#ifdef WINAPI_FAMILY
# define open _open
# define read _read
# define write _write
# define close _close
#endif
#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
#endif
#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#if defined(__CYGWIN__)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#ifndef HAVE_VSNPRINTF
# ifdef MSDOS
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
but for now we just assume it doesn't. */
# define NO_vsnprintf
# endif
# ifdef __TURBOC__
# define NO_vsnprintf
# endif
# ifdef WIN32
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
# if !defined(vsnprintf) && !defined(NO_vsnprintf)
# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
# define vsnprintf _vsnprintf
# endif
# endif
# endif
# ifdef __SASC
# define NO_vsnprintf
# endif
# ifdef VMS
# define NO_vsnprintf
# endif
# ifdef __OS400__
# define NO_vsnprintf
# endif
# ifdef __MVS__
# define NO_vsnprintf
# endif
#endif
/* unlike snprintf (which is required in C99, yet still not supported by
Microsoft more than a decade later!), _snprintf does not guarantee null
termination of the result -- however this is only used in gzlib.c where
the result is assured to fit in the space provided */
#ifdef _MSC_VER
# define snprintf _snprintf
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
/* gz* functions always use library allocation functions */
#ifndef STDC
extern voidp malloc OF((uInt size));
extern void free OF((voidpf ptr));
#endif
/* get errno and strerror definition */
#if defined UNDER_CE
# include <windows.h>
# define zstrerror() gz_strwinerror((DWORD)GetLastError())
#else
# ifndef NO_STRERROR
# include <errno.h>
# define zstrerror() strerror(errno)
# else
# define zstrerror() "stdio error (consult errno)"
# endif
#endif
/* provide prototypes for these when building zlib without LFS */
#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
#endif
/* default memLevel */
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
/* default i/o buffer size -- double this for output when reading (this and
twice this must be able to fit in an unsigned type) */
#define GZBUFSIZE 8192
/* gzip modes, also provide a little integrity check on the passed structure */
#define GZ_NONE 0
#define GZ_READ 7247
#define GZ_WRITE 31153
#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
/* values for gz_state how */
#define LOOK 0 /* look for a gzip header */
#define COPY 1 /* copy input directly */
#define GZIP 2 /* decompress a gzip stream */
/* internal gzip file state data structure */
typedef struct {
/* exposed contents for gzgetc() macro */
struct gzFile_s x; /* "x" for exposed */
/* x.have: number of bytes available at x.next */
/* x.next: next output data to deliver or write */
/* x.pos: current position in uncompressed data */
/* used for both reading and writing */
int mode; /* see gzip modes above */
int fd; /* file descriptor */
char *path; /* path or fd for error messages */
unsigned size; /* buffer size, zero if not allocated yet */
unsigned want; /* requested buffer size, default is GZBUFSIZE */
unsigned char *in; /* input buffer */
unsigned char *out; /* output buffer (double-sized when reading) */
int direct; /* 0 if processing gzip, 1 if transparent */
/* just for reading */
int how; /* 0: get header, 1: copy, 2: decompress */
z_off64_t start; /* where the gzip data started, for rewinding */
int eof; /* true if end of input file reached */
int past; /* true if read requested past end */
/* just for writing */
int level; /* compression level */
int strategy; /* compression strategy */
/* seek request */
z_off64_t skip; /* amount to skip (already rewound if backwards) */
int seek; /* true if seek request pending */
/* error information */
int err; /* error code */
char *msg; /* error message */
/* zlib inflate or deflate stream */
z_stream strm; /* stream structure in-place (not a pointer) */
} gz_state;
typedef gz_state FAR *gz_statep;
/* shared functions */
void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
#if defined UNDER_CE
char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
#endif
/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
value -- needed when comparing unsigned to z_off64_t, which is signed
(possible z_off64_t types off_t, off64_t, and long are all signed) */
#ifdef INT_MAX
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
#else
unsigned ZLIB_INTERNAL gz_intmax OF((void));
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
#endif

634
contrib/zlib/gzlib.c 100644
View File

@ -0,0 +1,634 @@
/* gzlib.c -- zlib functions common to reading and writing gzip files
* Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
#if defined(_WIN32) && !defined(__BORLANDC__)
# define LSEEK _lseeki64
#else
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
# define LSEEK lseek64
#else
# define LSEEK lseek
#endif
#endif
/* Local functions */
local void gz_reset OF((gz_statep));
local gzFile gz_open OF((const void *, int, const char *));
#if defined UNDER_CE
/* Map the Windows error number in ERROR to a locale-dependent error message
string and return a pointer to it. Typically, the values for ERROR come
from GetLastError.
The string pointed to shall not be modified by the application, but may be
overwritten by a subsequent call to gz_strwinerror
The gz_strwinerror function does not change the current setting of
GetLastError. */
char ZLIB_INTERNAL *gz_strwinerror (error)
DWORD error;
{
static char buf[1024];
wchar_t *msgbuf;
DWORD lasterr = GetLastError();
DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_ALLOCATE_BUFFER,
NULL,
error,
0, /* Default language */
(LPVOID)&msgbuf,
0,
NULL);
if (chars != 0) {
/* If there is an \r\n appended, zap it. */
if (chars >= 2
&& msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
chars -= 2;
msgbuf[chars] = 0;
}
if (chars > sizeof (buf) - 1) {
chars = sizeof (buf) - 1;
msgbuf[chars] = 0;
}
wcstombs(buf, msgbuf, chars + 1);
LocalFree(msgbuf);
}
else {
sprintf(buf, "unknown win32 error (%ld)", error);
}
SetLastError(lasterr);
return buf;
}
#endif /* UNDER_CE */
/* Reset gzip file state */
local void gz_reset(state)
gz_statep state;
{
state->x.have = 0; /* no output data available */
if (state->mode == GZ_READ) { /* for reading ... */
state->eof = 0; /* not at end of file */
state->past = 0; /* have not read past end yet */
state->how = LOOK; /* look for gzip header */
}
state->seek = 0; /* no seek request pending */
gz_error(state, Z_OK, NULL); /* clear error */
state->x.pos = 0; /* no uncompressed data yet */
state->strm.avail_in = 0; /* no input data yet */
}
/* Open a gzip file either by name or file descriptor. */
local gzFile gz_open(path, fd, mode)
const void *path;
int fd;
const char *mode;
{
gz_statep state;
size_t len;
int oflag;
#ifdef O_CLOEXEC
int cloexec = 0;
#endif
#ifdef O_EXCL
int exclusive = 0;
#endif
/* check input */
if (path == NULL)
return NULL;
/* allocate gzFile structure to return */
state = (gz_statep)malloc(sizeof(gz_state));
if (state == NULL)
return NULL;
state->size = 0; /* no buffers allocated yet */
state->want = GZBUFSIZE; /* requested buffer size */
state->msg = NULL; /* no error message yet */
/* interpret mode */
state->mode = GZ_NONE;
state->level = Z_DEFAULT_COMPRESSION;
state->strategy = Z_DEFAULT_STRATEGY;
state->direct = 0;
while (*mode) {
if (*mode >= '0' && *mode <= '9')
state->level = *mode - '0';
else
switch (*mode) {
case 'r':
state->mode = GZ_READ;
break;
#ifndef NO_GZCOMPRESS
case 'w':
state->mode = GZ_WRITE;
break;
case 'a':
state->mode = GZ_APPEND;
break;
#endif
case '+': /* can't read and write at the same time */
free(state);
return NULL;
case 'b': /* ignore -- will request binary anyway */
break;
#ifdef O_CLOEXEC
case 'e':
cloexec = 1;
break;
#endif
#ifdef O_EXCL
case 'x':
exclusive = 1;
break;
#endif
case 'f':
state->strategy = Z_FILTERED;
break;
case 'h':
state->strategy = Z_HUFFMAN_ONLY;
break;
case 'R':
state->strategy = Z_RLE;
break;
case 'F':
state->strategy = Z_FIXED;
break;
case 'T':
state->direct = 1;
break;
default: /* could consider as an error, but just ignore */
;
}
mode++;
}
/* must provide an "r", "w", or "a" */
if (state->mode == GZ_NONE) {
free(state);
return NULL;
}
/* can't force transparent read */
if (state->mode == GZ_READ) {
if (state->direct) {
free(state);
return NULL;
}
state->direct = 1; /* for empty file */
}
/* save the path name for error messages */
#ifdef _WIN32
if (fd == -2) {
len = wcstombs(NULL, path, 0);
if (len == (size_t)-1)
len = 0;
}
else
#endif
len = strlen((const char *)path);
state->path = (char *)malloc(len + 1);
if (state->path == NULL) {
free(state);
return NULL;
}
#ifdef _WIN32
if (fd == -2)
if (len)
wcstombs(state->path, path, len + 1);
else
*(state->path) = 0;
else
#endif
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
snprintf(state->path, len + 1, "%s", (const char *)path);
#else
strcpy(state->path, path);
#endif
/* compute the flags for open() */
oflag =
#ifdef O_LARGEFILE
O_LARGEFILE |
#endif
#ifdef O_BINARY
O_BINARY |
#endif
#ifdef O_CLOEXEC
(cloexec ? O_CLOEXEC : 0) |
#endif
(state->mode == GZ_READ ?
O_RDONLY :
(O_WRONLY | O_CREAT |
#ifdef O_EXCL
(exclusive ? O_EXCL : 0) |
#endif
(state->mode == GZ_WRITE ?
O_TRUNC :
O_APPEND)));
/* open the file with the appropriate flags (or just use fd) */
state->fd = fd > -1 ? fd : (
#ifdef _WIN32
fd == -2 ? _wopen(path, oflag, 0666) :
#endif
open((const char *)path, oflag, 0666));
if (state->fd == -1) {
free(state->path);
free(state);
return NULL;
}
if (state->mode == GZ_APPEND)
state->mode = GZ_WRITE; /* simplify later checks */
/* save the current position for rewinding (only if reading) */
if (state->mode == GZ_READ) {
state->start = LSEEK(state->fd, 0, SEEK_CUR);
if (state->start == -1) state->start = 0;
}
/* initialize stream */
gz_reset(state);
/* return stream */
return (gzFile)state;
}
/* -- see zlib.h -- */
gzFile ZEXPORT gzopen(path, mode)
const char *path;
const char *mode;
{
return gz_open(path, -1, mode);
}
/* -- see zlib.h -- */
gzFile ZEXPORT gzopen64(path, mode)
const char *path;
const char *mode;
{
return gz_open(path, -1, mode);
}
/* -- see zlib.h -- */
gzFile ZEXPORT gzdopen(fd, mode)
int fd;
const char *mode;
{
char *path; /* identifier for error messages */
gzFile gz;
if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
return NULL;
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
#else
sprintf(path, "<fd:%d>", fd); /* for debugging */
#endif
gz = gz_open(path, fd, mode);
free(path);
return gz;
}
/* -- see zlib.h -- */
#ifdef _WIN32
gzFile ZEXPORT gzopen_w(path, mode)
const wchar_t *path;
const char *mode;
{
return gz_open(path, -2, mode);
}
#endif
/* -- see zlib.h -- */
int ZEXPORT gzbuffer(file, size)
gzFile file;
unsigned size;
{
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return -1;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return -1;
/* make sure we haven't already allocated memory */
if (state->size != 0)
return -1;
/* check and set requested size */
if (size < 2)
size = 2; /* need two bytes to check magic header */
state->want = size;
return 0;
}
/* -- see zlib.h -- */
int ZEXPORT gzrewind(file)
gzFile file;
{
gz_statep state;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
/* check that we're reading and that there's no error */
if (state->mode != GZ_READ ||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
return -1;
/* back up and start over */
if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
return -1;
gz_reset(state);
return 0;
}
/* -- see zlib.h -- */
z_off64_t ZEXPORT gzseek64(file, offset, whence)
gzFile file;
z_off64_t offset;
int whence;
{
unsigned n;
z_off64_t ret;
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return -1;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return -1;
/* check that there's no error */
if (state->err != Z_OK && state->err != Z_BUF_ERROR)
return -1;
/* can only seek from start or relative to current position */
if (whence != SEEK_SET && whence != SEEK_CUR)
return -1;
/* normalize offset to a SEEK_CUR specification */
if (whence == SEEK_SET)
offset -= state->x.pos;
else if (state->seek)
offset += state->skip;
state->seek = 0;
/* if within raw area while reading, just go there */
if (state->mode == GZ_READ && state->how == COPY &&
state->x.pos + offset >= 0) {
ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
if (ret == -1)
return -1;
state->x.have = 0;
state->eof = 0;
state->past = 0;
state->seek = 0;
gz_error(state, Z_OK, NULL);
state->strm.avail_in = 0;
state->x.pos += offset;
return state->x.pos;
}
/* calculate skip amount, rewinding if needed for back seek when reading */
if (offset < 0) {
if (state->mode != GZ_READ) /* writing -- can't go backwards */
return -1;
offset += state->x.pos;
if (offset < 0) /* before start of file! */
return -1;
if (gzrewind(file) == -1) /* rewind, then skip to offset */
return -1;
}
/* if reading, skip what's in output buffer (one less gzgetc() check) */
if (state->mode == GZ_READ) {
n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
(unsigned)offset : state->x.have;
state->x.have -= n;
state->x.next += n;
state->x.pos += n;
offset -= n;
}
/* request skip (if not zero) */
if (offset) {
state->seek = 1;
state->skip = offset;
}
return state->x.pos + offset;
}
/* -- see zlib.h -- */
z_off_t ZEXPORT gzseek(file, offset, whence)
gzFile file;
z_off_t offset;
int whence;
{
z_off64_t ret;
ret = gzseek64(file, (z_off64_t)offset, whence);
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
}
/* -- see zlib.h -- */
z_off64_t ZEXPORT gztell64(file)
gzFile file;
{
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return -1;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return -1;
/* return position */
return state->x.pos + (state->seek ? state->skip : 0);
}
/* -- see zlib.h -- */
z_off_t ZEXPORT gztell(file)
gzFile file;
{
z_off64_t ret;
ret = gztell64(file);
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
}
/* -- see zlib.h -- */
z_off64_t ZEXPORT gzoffset64(file)
gzFile file;
{
z_off64_t offset;
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return -1;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return -1;
/* compute and return effective offset in file */
offset = LSEEK(state->fd, 0, SEEK_CUR);
if (offset == -1)
return -1;
if (state->mode == GZ_READ) /* reading */
offset -= state->strm.avail_in; /* don't count buffered input */
return offset;
}
/* -- see zlib.h -- */
z_off_t ZEXPORT gzoffset(file)
gzFile file;
{
z_off64_t ret;
ret = gzoffset64(file);
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
}
/* -- see zlib.h -- */
int ZEXPORT gzeof(file)
gzFile file;
{
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return 0;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return 0;
/* return end-of-file state */
return state->mode == GZ_READ ? state->past : 0;
}
/* -- see zlib.h -- */
const char * ZEXPORT gzerror(file, errnum)
gzFile file;
int *errnum;
{
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return NULL;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return NULL;
/* return error information */
if (errnum != NULL)
*errnum = state->err;
return state->err == Z_MEM_ERROR ? "out of memory" :
(state->msg == NULL ? "" : state->msg);
}
/* -- see zlib.h -- */
void ZEXPORT gzclearerr(file)
gzFile file;
{
gz_statep state;
/* get internal structure and check integrity */
if (file == NULL)
return;
state = (gz_statep)file;
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
return;
/* clear error and end-of-file */
if (state->mode == GZ_READ) {
state->eof = 0;
state->past = 0;
}
gz_error(state, Z_OK, NULL);
}
/* Create an error message in allocated memory and set state->err and
state->msg accordingly. Free any previous error message already there. Do
not try to free or allocate space if the error is Z_MEM_ERROR (out of
memory). Simply save the error message as a static string. If there is an
allocation failure constructing the error message, then convert the error to
out of memory. */
void ZLIB_INTERNAL gz_error(state, err, msg)
gz_statep state;
int err;
const char *msg;
{
/* free previously allocated message and clear */
if (state->msg != NULL) {
if (state->err != Z_MEM_ERROR)
free(state->msg);
state->msg = NULL;
}
/* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
if (err != Z_OK && err != Z_BUF_ERROR)
state->x.have = 0;
/* set error code, and if no message, then done */
state->err = err;
if (msg == NULL)
return;
/* for an out of memory error, return literal string when requested */
if (err == Z_MEM_ERROR)
return;
/* construct error message with path */
if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
NULL) {
state->err = Z_MEM_ERROR;
return;
}
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
"%s%s%s", state->path, ": ", msg);
#else
strcpy(state->msg, state->path);
strcat(state->msg, ": ");
strcat(state->msg, msg);
#endif
return;
}
#ifndef INT_MAX
/* portably return maximum value for an int (when limits.h presumed not
available) -- we need to do this to cover cases where 2's complement not
used, since C standard permits 1's complement and sign-bit representations,
otherwise we could just use ((unsigned)-1) >> 1 */
unsigned ZLIB_INTERNAL gz_intmax()
{
unsigned p, q;
p = 1;
do {
q = p;
p <<= 1;
p++;
} while (p > q);
return q >> 1;
}
#endif

594
contrib/zlib/gzread.c 100644
View File

@ -0,0 +1,594 @@
/* gzread.c -- zlib functions for reading gzip files
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
/* Local functions */
local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *));
local int gz_avail OF((gz_statep));
local int gz_look OF((gz_statep));
local int gz_decomp OF((gz_statep));
local int gz_fetch OF((gz_statep));
local int gz_skip OF((gz_statep, z_off64_t));
/* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from
state->fd, and update state->eof, state->err, and state->msg as appropriate.
This function needs to loop on read(), since read() is not guaranteed to
read the number of bytes requested, depending on the type of descriptor. */
local int gz_load(state, buf, len, have)
gz_statep state;
unsigned char *buf;
unsigned len;
unsigned *have;
{
int ret;
*have = 0;
do {
ret = read(state->fd, buf + *have, len - *have);
if (ret <= 0)
break;
*have += ret;
} while (*have < len);
if (ret < 0) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
}
if (ret == 0)
state->eof = 1;
return 0;
}
/* Load up input buffer and set eof flag if last data loaded -- return -1 on
error, 0 otherwise. Note that the eof flag is set when the end of the input
file is reached, even though there may be unused data in the buffer. Once
that data has been used, no more attempts will be made to read the file.
If strm->avail_in != 0, then the current data is moved to the beginning of
the input buffer, and then the remainder of the buffer is loaded with the
available data from the input file. */
local int gz_avail(state)
gz_statep state;
{
unsigned got;
z_streamp strm = &(state->strm);
if (state->err != Z_OK && state->err != Z_BUF_ERROR)
return -1;
if (state->eof == 0) {
if (strm->avail_in) { /* copy what's there to the start */
unsigned char *p = state->in;
unsigned const char *q = strm->next_in;
unsigned n = strm->avail_in;
do {
*p++ = *q++;
} while (--n);
}
if (gz_load(state, state->in + strm->avail_in,
state->size - strm->avail_in, &got) == -1)
return -1;
strm->avail_in += got;
strm->next_in = state->in;
}
return 0;
}
/* Look for gzip header, set up for inflate or copy. state->x.have must be 0.
If this is the first time in, allocate required memory. state->how will be
left unchanged if there is no more input data available, will be set to COPY
if there is no gzip header and direct copying will be performed, or it will
be set to GZIP for decompression. If direct copying, then leftover input
data from the input buffer will be copied to the output buffer. In that
case, all further file reads will be directly to either the output buffer or
a user buffer. If decompressing, the inflate state will be initialized.
gz_look() will return 0 on success or -1 on failure. */
local int gz_look(state)
gz_statep state;
{
z_streamp strm = &(state->strm);
/* allocate read buffers and inflate memory */
if (state->size == 0) {
/* allocate buffers */
state->in = (unsigned char *)malloc(state->want);
state->out = (unsigned char *)malloc(state->want << 1);
if (state->in == NULL || state->out == NULL) {
if (state->out != NULL)
free(state->out);
if (state->in != NULL)
free(state->in);
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
state->size = state->want;
/* allocate inflate memory */
state->strm.zalloc = Z_NULL;
state->strm.zfree = Z_NULL;
state->strm.opaque = Z_NULL;
state->strm.avail_in = 0;
state->strm.next_in = Z_NULL;
if (inflateInit2(&(state->strm), 15 + 16) != Z_OK) { /* gunzip */
free(state->out);
free(state->in);
state->size = 0;
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
}
/* get at least the magic bytes in the input buffer */
if (strm->avail_in < 2) {
if (gz_avail(state) == -1)
return -1;
if (strm->avail_in == 0)
return 0;
}
/* look for gzip magic bytes -- if there, do gzip decoding (note: there is
a logical dilemma here when considering the case of a partially written
gzip file, to wit, if a single 31 byte is written, then we cannot tell
whether this is a single-byte file, or just a partially written gzip
file -- for here we assume that if a gzip file is being written, then
the header will be written in a single operation, so that reading a
single byte is sufficient indication that it is not a gzip file) */
if (strm->avail_in > 1 &&
strm->next_in[0] == 31 && strm->next_in[1] == 139) {
inflateReset(strm);
state->how = GZIP;
state->direct = 0;
return 0;
}
/* no gzip header -- if we were decoding gzip before, then this is trailing
garbage. Ignore the trailing garbage and finish. */
if (state->direct == 0) {
strm->avail_in = 0;
state->eof = 1;
state->x.have = 0;
return 0;
}
/* doing raw i/o, copy any leftover input to output -- this assumes that
the output buffer is larger than the input buffer, which also assures
space for gzungetc() */
state->x.next = state->out;
if (strm->avail_in) {
memcpy(state->x.next, strm->next_in, strm->avail_in);
state->x.have = strm->avail_in;
strm->avail_in = 0;
}
state->how = COPY;
state->direct = 1;
return 0;
}
/* Decompress from input to the provided next_out and avail_out in the state.
On return, state->x.have and state->x.next point to the just decompressed
data. If the gzip stream completes, state->how is reset to LOOK to look for
the next gzip stream or raw data, once state->x.have is depleted. Returns 0
on success, -1 on failure. */
local int gz_decomp(state)
gz_statep state;
{
int ret = Z_OK;
unsigned had;
z_streamp strm = &(state->strm);
/* fill output buffer up to end of deflate stream */
had = strm->avail_out;
do {
/* get more input for inflate() */
if (strm->avail_in == 0 && gz_avail(state) == -1)
return -1;
if (strm->avail_in == 0) {
gz_error(state, Z_BUF_ERROR, "unexpected end of file");
break;
}
/* decompress and handle errors */
ret = inflate(strm, Z_NO_FLUSH);
if (ret == Z_STREAM_ERROR || ret == Z_NEED_DICT) {
gz_error(state, Z_STREAM_ERROR,
"internal error: inflate stream corrupt");
return -1;
}
if (ret == Z_MEM_ERROR) {
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
if (ret == Z_DATA_ERROR) { /* deflate stream invalid */
gz_error(state, Z_DATA_ERROR,
strm->msg == NULL ? "compressed data error" : strm->msg);
return -1;
}
} while (strm->avail_out && ret != Z_STREAM_END);
/* update available output */
state->x.have = had - strm->avail_out;
state->x.next = strm->next_out - state->x.have;
/* if the gzip stream completed successfully, look for another */
if (ret == Z_STREAM_END)
state->how = LOOK;
/* good decompression */
return 0;
}
/* Fetch data and put it in the output buffer. Assumes state->x.have is 0.
Data is either copied from the input file or decompressed from the input
file depending on state->how. If state->how is LOOK, then a gzip header is
looked for to determine whether to copy or decompress. Returns -1 on error,
otherwise 0. gz_fetch() will leave state->how as COPY or GZIP unless the
end of the input file has been reached and all data has been processed. */
local int gz_fetch(state)
gz_statep state;
{
z_streamp strm = &(state->strm);
do {
switch(state->how) {
case LOOK: /* -> LOOK, COPY (only if never GZIP), or GZIP */
if (gz_look(state) == -1)
return -1;
if (state->how == LOOK)
return 0;
break;
case COPY: /* -> COPY */
if (gz_load(state, state->out, state->size << 1, &(state->x.have))
== -1)
return -1;
state->x.next = state->out;
return 0;
case GZIP: /* -> GZIP or LOOK (if end of gzip stream) */
strm->avail_out = state->size << 1;
strm->next_out = state->out;
if (gz_decomp(state) == -1)
return -1;
}
} while (state->x.have == 0 && (!state->eof || strm->avail_in));
return 0;
}
/* Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */
local int gz_skip(state, len)
gz_statep state;
z_off64_t len;
{
unsigned n;
/* skip over len bytes or reach end-of-file, whichever comes first */
while (len)
/* skip over whatever is in output buffer */
if (state->x.have) {
n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > len ?
(unsigned)len : state->x.have;
state->x.have -= n;
state->x.next += n;
state->x.pos += n;
len -= n;
}
/* output buffer empty -- return if we're at the end of the input */
else if (state->eof && state->strm.avail_in == 0)
break;
/* need more data to skip -- load up output buffer */
else {
/* get more output, looking for header if required */
if (gz_fetch(state) == -1)
return -1;
}
return 0;
}
/* -- see zlib.h -- */
int ZEXPORT gzread(file, buf, len)
gzFile file;
voidp buf;
unsigned len;
{
unsigned got, n;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're reading and that there's no (serious) error */
if (state->mode != GZ_READ ||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
return -1;
/* since an int is returned, make sure len fits in one, otherwise return
with an error (this avoids the flaw in the interface) */
if ((int)len < 0) {
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return -1;
}
/* if len is zero, avoid unnecessary operations */
if (len == 0)
return 0;
/* process a skip request */
if (state->seek) {
state->seek = 0;
if (gz_skip(state, state->skip) == -1)
return -1;
}
/* get len bytes to buf, or less than len if at the end */
got = 0;
do {
/* first just try copying data from the output buffer */
if (state->x.have) {
n = state->x.have > len ? len : state->x.have;
memcpy(buf, state->x.next, n);
state->x.next += n;
state->x.have -= n;
}
/* output buffer empty -- return if we're at the end of the input */
else if (state->eof && strm->avail_in == 0) {
state->past = 1; /* tried to read past end */
break;
}
/* need output data -- for small len or new stream load up our output
buffer */
else if (state->how == LOOK || len < (state->size << 1)) {
/* get more output, looking for header if required */
if (gz_fetch(state) == -1)
return -1;
continue; /* no progress yet -- go back to copy above */
/* the copy above assures that we will leave with space in the
output buffer, allowing at least one gzungetc() to succeed */
}
/* large len -- read directly into user buffer */
else if (state->how == COPY) { /* read directly */
if (gz_load(state, (unsigned char *)buf, len, &n) == -1)
return -1;
}
/* large len -- decompress directly into user buffer */
else { /* state->how == GZIP */
strm->avail_out = len;
strm->next_out = (unsigned char *)buf;
if (gz_decomp(state) == -1)
return -1;
n = state->x.have;
state->x.have = 0;
}
/* update progress */
len -= n;
buf = (char *)buf + n;
got += n;
state->x.pos += n;
} while (len);
/* return number of bytes read into user buffer (will fit in int) */
return (int)got;
}
/* -- see zlib.h -- */
#ifdef Z_PREFIX_SET
# undef z_gzgetc
#else
# undef gzgetc
#endif
int ZEXPORT gzgetc(file)
gzFile file;
{
int ret;
unsigned char buf[1];
gz_statep state;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
/* check that we're reading and that there's no (serious) error */
if (state->mode != GZ_READ ||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
return -1;
/* try output buffer (no need to check for skip request) */
if (state->x.have) {
state->x.have--;
state->x.pos++;
return *(state->x.next)++;
}
/* nothing there -- try gzread() */
ret = gzread(file, buf, 1);
return ret < 1 ? -1 : buf[0];
}
int ZEXPORT gzgetc_(file)
gzFile file;
{
return gzgetc(file);
}
/* -- see zlib.h -- */
int ZEXPORT gzungetc(c, file)
int c;
gzFile file;
{
gz_statep state;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
/* check that we're reading and that there's no (serious) error */
if (state->mode != GZ_READ ||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
return -1;
/* process a skip request */
if (state->seek) {
state->seek = 0;
if (gz_skip(state, state->skip) == -1)
return -1;
}
/* can't push EOF */
if (c < 0)
return -1;
/* if output buffer empty, put byte at end (allows more pushing) */
if (state->x.have == 0) {
state->x.have = 1;
state->x.next = state->out + (state->size << 1) - 1;
state->x.next[0] = c;
state->x.pos--;
state->past = 0;
return c;
}
/* if no room, give up (must have already done a gzungetc()) */
if (state->x.have == (state->size << 1)) {
gz_error(state, Z_DATA_ERROR, "out of room to push characters");
return -1;
}
/* slide output data if needed and insert byte before existing data */
if (state->x.next == state->out) {
unsigned char *src = state->out + state->x.have;
unsigned char *dest = state->out + (state->size << 1);
while (src > state->out)
*--dest = *--src;
state->x.next = dest;
}
state->x.have++;
state->x.next--;
state->x.next[0] = c;
state->x.pos--;
state->past = 0;
return c;
}
/* -- see zlib.h -- */
char * ZEXPORT gzgets(file, buf, len)
gzFile file;
char *buf;
int len;
{
unsigned left, n;
char *str;
unsigned char *eol;
gz_statep state;
/* check parameters and get internal structure */
if (file == NULL || buf == NULL || len < 1)
return NULL;
state = (gz_statep)file;
/* check that we're reading and that there's no (serious) error */
if (state->mode != GZ_READ ||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
return NULL;
/* process a skip request */
if (state->seek) {
state->seek = 0;
if (gz_skip(state, state->skip) == -1)
return NULL;
}
/* copy output bytes up to new line or len - 1, whichever comes first --
append a terminating zero to the string (we don't check for a zero in
the contents, let the user worry about that) */
str = buf;
left = (unsigned)len - 1;
if (left) do {
/* assure that something is in the output buffer */
if (state->x.have == 0 && gz_fetch(state) == -1)
return NULL; /* error */
if (state->x.have == 0) { /* end of file */
state->past = 1; /* read past end */
break; /* return what we have */
}
/* look for end-of-line in current output buffer */
n = state->x.have > left ? left : state->x.have;
eol = (unsigned char *)memchr(state->x.next, '\n', n);
if (eol != NULL)
n = (unsigned)(eol - state->x.next) + 1;
/* copy through end-of-line, or remainder if not found */
memcpy(buf, state->x.next, n);
state->x.have -= n;
state->x.next += n;
state->x.pos += n;
left -= n;
buf += n;
} while (left && eol == NULL);
/* return terminated string, or if nothing, end of file */
if (buf == str)
return NULL;
buf[0] = 0;
return str;
}
/* -- see zlib.h -- */
int ZEXPORT gzdirect(file)
gzFile file;
{
gz_statep state;
/* get internal structure */
if (file == NULL)
return 0;
state = (gz_statep)file;
/* if the state is not known, but we can find out, then do so (this is
mainly for right after a gzopen() or gzdopen()) */
if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0)
(void)gz_look(state);
/* return 1 if transparent, 0 if processing a gzip stream */
return state->direct;
}
/* -- see zlib.h -- */
int ZEXPORT gzclose_r(file)
gzFile file;
{
int ret, err;
gz_statep state;
/* get internal structure */
if (file == NULL)
return Z_STREAM_ERROR;
state = (gz_statep)file;
/* check that we're reading */
if (state->mode != GZ_READ)
return Z_STREAM_ERROR;
/* free memory and close file */
if (state->size) {
inflateEnd(&(state->strm));
free(state->out);
free(state->in);
}
err = state->err == Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK;
gz_error(state, Z_OK, NULL);
free(state->path);
ret = close(state->fd);
free(state);
return ret ? Z_ERRNO : err;
}

577
contrib/zlib/gzwrite.c 100644
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/* gzwrite.c -- zlib functions for writing gzip files
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
/* Local functions */
local int gz_init OF((gz_statep));
local int gz_comp OF((gz_statep, int));
local int gz_zero OF((gz_statep, z_off64_t));
/* Initialize state for writing a gzip file. Mark initialization by setting
state->size to non-zero. Return -1 on failure or 0 on success. */
local int gz_init(state)
gz_statep state;
{
int ret;
z_streamp strm = &(state->strm);
/* allocate input buffer */
state->in = (unsigned char *)malloc(state->want);
if (state->in == NULL) {
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
/* only need output buffer and deflate state if compressing */
if (!state->direct) {
/* allocate output buffer */
state->out = (unsigned char *)malloc(state->want);
if (state->out == NULL) {
free(state->in);
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
/* allocate deflate memory, set up for gzip compression */
strm->zalloc = Z_NULL;
strm->zfree = Z_NULL;
strm->opaque = Z_NULL;
ret = deflateInit2(strm, state->level, Z_DEFLATED,
MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);
if (ret != Z_OK) {
free(state->out);
free(state->in);
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
}
/* mark state as initialized */
state->size = state->want;
/* initialize write buffer if compressing */
if (!state->direct) {
strm->avail_out = state->size;
strm->next_out = state->out;
state->x.next = strm->next_out;
}
return 0;
}
/* Compress whatever is at avail_in and next_in and write to the output file.
Return -1 if there is an error writing to the output file, otherwise 0.
flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,
then the deflate() state is reset to start a new gzip stream. If gz->direct
is true, then simply write to the output file without compressing, and
ignore flush. */
local int gz_comp(state, flush)
gz_statep state;
int flush;
{
int ret, got;
unsigned have;
z_streamp strm = &(state->strm);
/* allocate memory if this is the first time through */
if (state->size == 0 && gz_init(state) == -1)
return -1;
/* write directly if requested */
if (state->direct) {
got = write(state->fd, strm->next_in, strm->avail_in);
if (got < 0 || (unsigned)got != strm->avail_in) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
}
strm->avail_in = 0;
return 0;
}
/* run deflate() on provided input until it produces no more output */
ret = Z_OK;
do {
/* write out current buffer contents if full, or if flushing, but if
doing Z_FINISH then don't write until we get to Z_STREAM_END */
if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
(flush != Z_FINISH || ret == Z_STREAM_END))) {
have = (unsigned)(strm->next_out - state->x.next);
if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||
(unsigned)got != have)) {
gz_error(state, Z_ERRNO, zstrerror());
return -1;
}
if (strm->avail_out == 0) {
strm->avail_out = state->size;
strm->next_out = state->out;
}
state->x.next = strm->next_out;
}
/* compress */
have = strm->avail_out;
ret = deflate(strm, flush);
if (ret == Z_STREAM_ERROR) {
gz_error(state, Z_STREAM_ERROR,
"internal error: deflate stream corrupt");
return -1;
}
have -= strm->avail_out;
} while (have);
/* if that completed a deflate stream, allow another to start */
if (flush == Z_FINISH)
deflateReset(strm);
/* all done, no errors */
return 0;
}
/* Compress len zeros to output. Return -1 on error, 0 on success. */
local int gz_zero(state, len)
gz_statep state;
z_off64_t len;
{
int first;
unsigned n;
z_streamp strm = &(state->strm);
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return -1;
/* compress len zeros (len guaranteed > 0) */
first = 1;
while (len) {
n = GT_OFF(state->size) || (z_off64_t)state->size > len ?
(unsigned)len : state->size;
if (first) {
memset(state->in, 0, n);
first = 0;
}
strm->avail_in = n;
strm->next_in = state->in;
state->x.pos += n;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return -1;
len -= n;
}
return 0;
}
/* -- see zlib.h -- */
int ZEXPORT gzwrite(file, buf, len)
gzFile file;
voidpc buf;
unsigned len;
{
unsigned put = len;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return 0;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return 0;
/* since an int is returned, make sure len fits in one, otherwise return
with an error (this avoids the flaw in the interface) */
if ((int)len < 0) {
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return 0;
}
/* if len is zero, avoid unnecessary operations */
if (len == 0)
return 0;
/* allocate memory if this is the first time through */
if (state->size == 0 && gz_init(state) == -1)
return 0;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return 0;
}
/* for small len, copy to input buffer, otherwise compress directly */
if (len < state->size) {
/* copy to input buffer, compress when full */
do {
unsigned have, copy;
if (strm->avail_in == 0)
strm->next_in = state->in;
have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
copy = state->size - have;
if (copy > len)
copy = len;
memcpy(state->in + have, buf, copy);
strm->avail_in += copy;
state->x.pos += copy;
buf = (const char *)buf + copy;
len -= copy;
if (len && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
} while (len);
}
else {
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* directly compress user buffer to file */
strm->avail_in = len;
strm->next_in = (z_const Bytef *)buf;
state->x.pos += len;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
}
/* input was all buffered or compressed (put will fit in int) */
return (int)put;
}
/* -- see zlib.h -- */
int ZEXPORT gzputc(file, c)
gzFile file;
int c;
{
unsigned have;
unsigned char buf[1];
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return -1;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return -1;
}
/* try writing to input buffer for speed (state->size == 0 if buffer not
initialized) */
if (state->size) {
if (strm->avail_in == 0)
strm->next_in = state->in;
have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
if (have < state->size) {
state->in[have] = c;
strm->avail_in++;
state->x.pos++;
return c & 0xff;
}
}
/* no room in buffer or not initialized, use gz_write() */
buf[0] = c;
if (gzwrite(file, buf, 1) != 1)
return -1;
return c & 0xff;
}
/* -- see zlib.h -- */
int ZEXPORT gzputs(file, str)
gzFile file;
const char *str;
{
int ret;
unsigned len;
/* write string */
len = (unsigned)strlen(str);
ret = gzwrite(file, str, len);
return ret == 0 && len != 0 ? -1 : ret;
}
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
#include <stdarg.h>
/* -- see zlib.h -- */
int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
{
int size, len;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return 0;
/* make sure we have some buffer space */
if (state->size == 0 && gz_init(state) == -1)
return 0;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return 0;
}
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* do the printf() into the input buffer, put length in len */
size = (int)(state->size);
state->in[size - 1] = 0;
#ifdef NO_vsnprintf
# ifdef HAS_vsprintf_void
(void)vsprintf((char *)(state->in), format, va);
for (len = 0; len < size; len++)
if (state->in[len] == 0) break;
# else
len = vsprintf((char *)(state->in), format, va);
# endif
#else
# ifdef HAS_vsnprintf_void
(void)vsnprintf((char *)(state->in), size, format, va);
len = strlen((char *)(state->in));
# else
len = vsnprintf((char *)(state->in), size, format, va);
# endif
#endif
/* check that printf() results fit in buffer */
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
return 0;
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
state->x.pos += len;
return len;
}
int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)
{
va_list va;
int ret;
va_start(va, format);
ret = gzvprintf(file, format, va);
va_end(va);
return ret;
}
#else /* !STDC && !Z_HAVE_STDARG_H */
/* -- see zlib.h -- */
int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
gzFile file;
const char *format;
int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
{
int size, len;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
strm = &(state->strm);
/* check that can really pass pointer in ints */
if (sizeof(int) != sizeof(void *))
return 0;
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return 0;
/* make sure we have some buffer space */
if (state->size == 0 && gz_init(state) == -1)
return 0;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return 0;
}
/* consume whatever's left in the input buffer */
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* do the printf() into the input buffer, put length in len */
size = (int)(state->size);
state->in[size - 1] = 0;
#ifdef NO_snprintf
# ifdef HAS_sprintf_void
sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
for (len = 0; len < size; len++)
if (state->in[len] == 0) break;
# else
len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
# endif
#else
# ifdef HAS_snprintf_void
snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
len = strlen((char *)(state->in));
# else
len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,
a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,
a19, a20);
# endif
#endif
/* check that printf() results fit in buffer */
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
return 0;
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
state->x.pos += len;
return len;
}
#endif
/* -- see zlib.h -- */
int ZEXPORT gzflush(file, flush)
gzFile file;
int flush;
{
gz_statep state;
/* get internal structure */
if (file == NULL)
return -1;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return Z_STREAM_ERROR;
/* check flush parameter */
if (flush < 0 || flush > Z_FINISH)
return Z_STREAM_ERROR;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return -1;
}
/* compress remaining data with requested flush */
gz_comp(state, flush);
return state->err;
}
/* -- see zlib.h -- */
int ZEXPORT gzsetparams(file, level, strategy)
gzFile file;
int level;
int strategy;
{
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
return Z_STREAM_ERROR;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return Z_STREAM_ERROR;
/* if no change is requested, then do nothing */
if (level == state->level && strategy == state->strategy)
return Z_OK;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
return -1;
}
/* change compression parameters for subsequent input */
if (state->size) {
/* flush previous input with previous parameters before changing */
if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)
return state->err;
deflateParams(strm, level, strategy);
}
state->level = level;
state->strategy = strategy;
return Z_OK;
}
/* -- see zlib.h -- */
int ZEXPORT gzclose_w(file)
gzFile file;
{
int ret = Z_OK;
gz_statep state;
/* get internal structure */
if (file == NULL)
return Z_STREAM_ERROR;
state = (gz_statep)file;
/* check that we're writing */
if (state->mode != GZ_WRITE)
return Z_STREAM_ERROR;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
ret = state->err;
}
/* flush, free memory, and close file */
if (gz_comp(state, Z_FINISH) == -1)
ret = state->err;
if (state->size) {
if (!state->direct) {
(void)deflateEnd(&(state->strm));
free(state->out);
}
free(state->in);
}
gz_error(state, Z_OK, NULL);
free(state->path);
if (close(state->fd) == -1)
ret = Z_ERRNO;
free(state);
return ret;
}

640
contrib/zlib/infback.c 100644
View File

@ -0,0 +1,640 @@
/* infback.c -- inflate using a call-back interface
* Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/*
This code is largely copied from inflate.c. Normally either infback.o or
inflate.o would be linked into an application--not both. The interface
with inffast.c is retained so that optimized assembler-coded versions of
inflate_fast() can be used with either inflate.c or infback.c.
*/
#include "zutil.h"
#include "inftrees.h"
#include "inflate.h"
#include "inffast.h"
/* function prototypes */
local void fixedtables OF((struct inflate_state FAR *state));
/*
strm provides memory allocation functions in zalloc and zfree, or
Z_NULL to use the library memory allocation functions.
windowBits is in the range 8..15, and window is a user-supplied
window and output buffer that is 2**windowBits bytes.
*/
int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
z_streamp strm;
int windowBits;
unsigned char FAR *window;
const char *version;
int stream_size;
{
struct inflate_state FAR *state;
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
stream_size != (int)(sizeof(z_stream)))
return Z_VERSION_ERROR;
if (strm == Z_NULL || window == Z_NULL ||
windowBits < 8 || windowBits > 15)
return Z_STREAM_ERROR;
strm->msg = Z_NULL; /* in case we return an error */
if (strm->zalloc == (alloc_func)0) {
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zalloc = zcalloc;
strm->opaque = (voidpf)0;
#endif
}
if (strm->zfree == (free_func)0)
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zfree = zcfree;
#endif
state = (struct inflate_state FAR *)ZALLOC(strm, 1,
sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR;
Tracev((stderr, "inflate: allocated\n"));
strm->state = (struct internal_state FAR *)state;
state->dmax = 32768U;
state->wbits = windowBits;
state->wsize = 1U << windowBits;
state->window = window;
state->wnext = 0;
state->whave = 0;
return Z_OK;
}
/*
Return state with length and distance decoding tables and index sizes set to
fixed code decoding. Normally this returns fixed tables from inffixed.h.
If BUILDFIXED is defined, then instead this routine builds the tables the
first time it's called, and returns those tables the first time and
thereafter. This reduces the size of the code by about 2K bytes, in
exchange for a little execution time. However, BUILDFIXED should not be
used for threaded applications, since the rewriting of the tables and virgin
may not be thread-safe.
*/
local void fixedtables(state)
struct inflate_state FAR *state;
{
#ifdef BUILDFIXED
static int virgin = 1;
static code *lenfix, *distfix;
static code fixed[544];
/* build fixed huffman tables if first call (may not be thread safe) */
if (virgin) {
unsigned sym, bits;
static code *next;
/* literal/length table */
sym = 0;
while (sym < 144) state->lens[sym++] = 8;
while (sym < 256) state->lens[sym++] = 9;
while (sym < 280) state->lens[sym++] = 7;
while (sym < 288) state->lens[sym++] = 8;
next = fixed;
lenfix = next;
bits = 9;
inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
/* distance table */
sym = 0;
while (sym < 32) state->lens[sym++] = 5;
distfix = next;
bits = 5;
inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
/* do this just once */
virgin = 0;
}
#else /* !BUILDFIXED */
# include "inffixed.h"
#endif /* BUILDFIXED */
state->lencode = lenfix;
state->lenbits = 9;
state->distcode = distfix;
state->distbits = 5;
}
/* Macros for inflateBack(): */
/* Load returned state from inflate_fast() */
#define LOAD() \
do { \
put = strm->next_out; \
left = strm->avail_out; \
next = strm->next_in; \
have = strm->avail_in; \
hold = state->hold; \
bits = state->bits; \
} while (0)
/* Set state from registers for inflate_fast() */
#define RESTORE() \
do { \
strm->next_out = put; \
strm->avail_out = left; \
strm->next_in = next; \
strm->avail_in = have; \
state->hold = hold; \
state->bits = bits; \
} while (0)
/* Clear the input bit accumulator */
#define INITBITS() \
do { \
hold = 0; \
bits = 0; \
} while (0)
/* Assure that some input is available. If input is requested, but denied,
then return a Z_BUF_ERROR from inflateBack(). */
#define PULL() \
do { \
if (have == 0) { \
have = in(in_desc, &next); \
if (have == 0) { \
next = Z_NULL; \
ret = Z_BUF_ERROR; \
goto inf_leave; \
} \
} \
} while (0)
/* Get a byte of input into the bit accumulator, or return from inflateBack()
with an error if there is no input available. */
#define PULLBYTE() \
do { \
PULL(); \
have--; \
hold += (unsigned long)(*next++) << bits; \
bits += 8; \
} while (0)
/* Assure that there are at least n bits in the bit accumulator. If there is
not enough available input to do that, then return from inflateBack() with
an error. */
#define NEEDBITS(n) \
do { \
while (bits < (unsigned)(n)) \
PULLBYTE(); \
} while (0)
/* Return the low n bits of the bit accumulator (n < 16) */
#define BITS(n) \
((unsigned)hold & ((1U << (n)) - 1))
/* Remove n bits from the bit accumulator */
#define DROPBITS(n) \
do { \
hold >>= (n); \
bits -= (unsigned)(n); \
} while (0)
/* Remove zero to seven bits as needed to go to a byte boundary */
#define BYTEBITS() \
do { \
hold >>= bits & 7; \
bits -= bits & 7; \
} while (0)
/* Assure that some output space is available, by writing out the window
if it's full. If the write fails, return from inflateBack() with a
Z_BUF_ERROR. */
#define ROOM() \
do { \
if (left == 0) { \
put = state->window; \
left = state->wsize; \
state->whave = left; \
if (out(out_desc, put, left)) { \
ret = Z_BUF_ERROR; \
goto inf_leave; \
} \
} \
} while (0)
/*
strm provides the memory allocation functions and window buffer on input,
and provides information on the unused input on return. For Z_DATA_ERROR
returns, strm will also provide an error message.
in() and out() are the call-back input and output functions. When
inflateBack() needs more input, it calls in(). When inflateBack() has
filled the window with output, or when it completes with data in the
window, it calls out() to write out the data. The application must not
change the provided input until in() is called again or inflateBack()
returns. The application must not change the window/output buffer until
inflateBack() returns.
in() and out() are called with a descriptor parameter provided in the
inflateBack() call. This parameter can be a structure that provides the
information required to do the read or write, as well as accumulated
information on the input and output such as totals and check values.
in() should return zero on failure. out() should return non-zero on
failure. If either in() or out() fails, than inflateBack() returns a
Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
was in() or out() that caused in the error. Otherwise, inflateBack()
returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
error, or Z_MEM_ERROR if it could not allocate memory for the state.
inflateBack() can also return Z_STREAM_ERROR if the input parameters
are not correct, i.e. strm is Z_NULL or the state was not initialized.
*/
int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
z_streamp strm;
in_func in;
void FAR *in_desc;
out_func out;
void FAR *out_desc;
{
struct inflate_state FAR *state;
z_const unsigned char FAR *next; /* next input */
unsigned char FAR *put; /* next output */
unsigned have, left; /* available input and output */
unsigned long hold; /* bit buffer */
unsigned bits; /* bits in bit buffer */
unsigned copy; /* number of stored or match bytes to copy */
unsigned char FAR *from; /* where to copy match bytes from */
code here; /* current decoding table entry */
code last; /* parent table entry */
unsigned len; /* length to copy for repeats, bits to drop */
int ret; /* return code */
static const unsigned short order[19] = /* permutation of code lengths */
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
/* Check that the strm exists and that the state was initialized */
if (strm == Z_NULL || strm->state == Z_NULL)
return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
/* Reset the state */
strm->msg = Z_NULL;
state->mode = TYPE;
state->last = 0;
state->whave = 0;
next = strm->next_in;
have = next != Z_NULL ? strm->avail_in : 0;
hold = 0;
bits = 0;
put = state->window;
left = state->wsize;
/* Inflate until end of block marked as last */
for (;;)
switch (state->mode) {
case TYPE:
/* determine and dispatch block type */
if (state->last) {
BYTEBITS();
state->mode = DONE;
break;
}
NEEDBITS(3);
state->last = BITS(1);
DROPBITS(1);
switch (BITS(2)) {
case 0: /* stored block */
Tracev((stderr, "inflate: stored block%s\n",
state->last ? " (last)" : ""));
state->mode = STORED;
break;
case 1: /* fixed block */
fixedtables(state);
Tracev((stderr, "inflate: fixed codes block%s\n",
state->last ? " (last)" : ""));
state->mode = LEN; /* decode codes */
break;
case 2: /* dynamic block */
Tracev((stderr, "inflate: dynamic codes block%s\n",
state->last ? " (last)" : ""));
state->mode = TABLE;
break;
case 3:
strm->msg = (char *)"invalid block type";
state->mode = BAD;
}
DROPBITS(2);
break;
case STORED:
/* get and verify stored block length */
BYTEBITS(); /* go to byte boundary */
NEEDBITS(32);
if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
strm->msg = (char *)"invalid stored block lengths";
state->mode = BAD;
break;
}
state->length = (unsigned)hold & 0xffff;
Tracev((stderr, "inflate: stored length %u\n",
state->length));
INITBITS();
/* copy stored block from input to output */
while (state->length != 0) {
copy = state->length;
PULL();
ROOM();
if (copy > have) copy = have;
if (copy > left) copy = left;
zmemcpy(put, next, copy);
have -= copy;
next += copy;
left -= copy;
put += copy;
state->length -= copy;
}
Tracev((stderr, "inflate: stored end\n"));
state->mode = TYPE;
break;
case TABLE:
/* get dynamic table entries descriptor */
NEEDBITS(14);
state->nlen = BITS(5) + 257;
DROPBITS(5);
state->ndist = BITS(5) + 1;
DROPBITS(5);
state->ncode = BITS(4) + 4;
DROPBITS(4);
#ifndef PKZIP_BUG_WORKAROUND
if (state->nlen > 286 || state->ndist > 30) {
strm->msg = (char *)"too many length or distance symbols";
state->mode = BAD;
break;
}
#endif
Tracev((stderr, "inflate: table sizes ok\n"));
/* get code length code lengths (not a typo) */
state->have = 0;
while (state->have < state->ncode) {
NEEDBITS(3);
state->lens[order[state->have++]] = (unsigned short)BITS(3);
DROPBITS(3);
}
while (state->have < 19)
state->lens[order[state->have++]] = 0;
state->next = state->codes;
state->lencode = (code const FAR *)(state->next);
state->lenbits = 7;
ret = inflate_table(CODES, state->lens, 19, &(state->next),
&(state->lenbits), state->work);
if (ret) {
strm->msg = (char *)"invalid code lengths set";
state->mode = BAD;
break;
}
Tracev((stderr, "inflate: code lengths ok\n"));
/* get length and distance code code lengths */
state->have = 0;
while (state->have < state->nlen + state->ndist) {
for (;;) {
here = state->lencode[BITS(state->lenbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if (here.val < 16) {
DROPBITS(here.bits);
state->lens[state->have++] = here.val;
}
else {
if (here.val == 16) {
NEEDBITS(here.bits + 2);
DROPBITS(here.bits);
if (state->have == 0) {
strm->msg = (char *)"invalid bit length repeat";
state->mode = BAD;
break;
}
len = (unsigned)(state->lens[state->have - 1]);
copy = 3 + BITS(2);
DROPBITS(2);
}
else if (here.val == 17) {
NEEDBITS(here.bits + 3);
DROPBITS(here.bits);
len = 0;
copy = 3 + BITS(3);
DROPBITS(3);
}
else {
NEEDBITS(here.bits + 7);
DROPBITS(here.bits);
len = 0;
copy = 11 + BITS(7);
DROPBITS(7);
}
if (state->have + copy > state->nlen + state->ndist) {
strm->msg = (char *)"invalid bit length repeat";
state->mode = BAD;
break;
}
while (copy--)
state->lens[state->have++] = (unsigned short)len;
}
}
/* handle error breaks in while */
if (state->mode == BAD) break;
/* check for end-of-block code (better have one) */
if (state->lens[256] == 0) {
strm->msg = (char *)"invalid code -- missing end-of-block";
state->mode = BAD;
break;
}
/* build code tables -- note: do not change the lenbits or distbits
values here (9 and 6) without reading the comments in inftrees.h
concerning the ENOUGH constants, which depend on those values */
state->next = state->codes;
state->lencode = (code const FAR *)(state->next);
state->lenbits = 9;
ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
&(state->lenbits), state->work);
if (ret) {
strm->msg = (char *)"invalid literal/lengths set";
state->mode = BAD;
break;
}
state->distcode = (code const FAR *)(state->next);
state->distbits = 6;
ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
&(state->next), &(state->distbits), state->work);
if (ret) {
strm->msg = (char *)"invalid distances set";
state->mode = BAD;
break;
}
Tracev((stderr, "inflate: codes ok\n"));
state->mode = LEN;
case LEN:
/* use inflate_fast() if we have enough input and output */
if (have >= 6 && left >= 258) {
RESTORE();
if (state->whave < state->wsize)
state->whave = state->wsize - left;
inflate_fast(strm, state->wsize);
LOAD();
break;
}
/* get a literal, length, or end-of-block code */
for (;;) {
here = state->lencode[BITS(state->lenbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if (here.op && (here.op & 0xf0) == 0) {
last = here;
for (;;) {
here = state->lencode[last.val +
(BITS(last.bits + last.op) >> last.bits)];
if ((unsigned)(last.bits + here.bits) <= bits) break;
PULLBYTE();
}
DROPBITS(last.bits);
}
DROPBITS(here.bits);
state->length = (unsigned)here.val;
/* process literal */
if (here.op == 0) {
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
"inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", here.val));
ROOM();
*put++ = (unsigned char)(state->length);
left--;
state->mode = LEN;
break;
}
/* process end of block */
if (here.op & 32) {
Tracevv((stderr, "inflate: end of block\n"));
state->mode = TYPE;
break;
}
/* invalid code */
if (here.op & 64) {
strm->msg = (char *)"invalid literal/length code";
state->mode = BAD;
break;
}
/* length code -- get extra bits, if any */
state->extra = (unsigned)(here.op) & 15;
if (state->extra != 0) {
NEEDBITS(state->extra);
state->length += BITS(state->extra);
DROPBITS(state->extra);
}
Tracevv((stderr, "inflate: length %u\n", state->length));
/* get distance code */
for (;;) {
here = state->distcode[BITS(state->distbits)];
if ((unsigned)(here.bits) <= bits) break;
PULLBYTE();
}
if ((here.op & 0xf0) == 0) {
last = here;
for (;;) {
here = state->distcode[last.val +
(BITS(last.bits + last.op) >> last.bits)];
if ((unsigned)(last.bits + here.bits) <= bits) break;
PULLBYTE();
}
DROPBITS(last.bits);
}
DROPBITS(here.bits);
if (here.op & 64) {
strm->msg = (char *)"invalid distance code";
state->mode = BAD;
break;
}
state->offset = (unsigned)here.val;
/* get distance extra bits, if any */
state->extra = (unsigned)(here.op) & 15;
if (state->extra != 0) {
NEEDBITS(state->extra);
state->offset += BITS(state->extra);
DROPBITS(state->extra);
}
if (state->offset > state->wsize - (state->whave < state->wsize ?
left : 0)) {
strm->msg = (char *)"invalid distance too far back";
state->mode = BAD;
break;
}
Tracevv((stderr, "inflate: distance %u\n", state->offset));
/* copy match from window to output */
do {
ROOM();
copy = state->wsize - state->offset;
if (copy < left) {
from = put + copy;
copy = left - copy;
}
else {
from = put - state->offset;
copy = left;
}
if (copy > state->length) copy = state->length;
state->length -= copy;
left -= copy;
do {
*put++ = *from++;
} while (--copy);
} while (state->length != 0);
break;
case DONE:
/* inflate stream terminated properly -- write leftover output */
ret = Z_STREAM_END;
if (left < state->wsize) {
if (out(out_desc, state->window, state->wsize - left))
ret = Z_BUF_ERROR;
}
goto inf_leave;
case BAD:
ret = Z_DATA_ERROR;
goto inf_leave;
default: /* can't happen, but makes compilers happy */
ret = Z_STREAM_ERROR;
goto inf_leave;
}
/* Return unused input */
inf_leave:
strm->next_in = next;
strm->avail_in = have;
return ret;
}
int ZEXPORT inflateBackEnd(strm)
z_streamp strm;
{
if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
return Z_STREAM_ERROR;
ZFREE(strm, strm->state);
strm->state = Z_NULL;
Tracev((stderr, "inflate: end\n"));
return Z_OK;
}

6
contrib/zlib/inffast.c
View File

@ -1,5 +1,5 @@
/* inffast.c -- fast decoding /* inffast.c -- fast decoding
* Copyright (C) 1995-2008, 2010 Mark Adler * Copyright (C) 1995-2008, 2010, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -69,8 +69,8 @@ z_streamp strm;
unsigned start; /* inflate()'s starting value for strm->avail_out */ unsigned start; /* inflate()'s starting value for strm->avail_out */
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
unsigned char FAR *in; /* local strm->next_in */ z_const unsigned char FAR *in; /* local strm->next_in */
unsigned char FAR *last; /* while in < last, enough input available */ z_const unsigned char FAR *last; /* have enough input while in < last */
unsigned char FAR *out; /* local strm->next_out */ unsigned char FAR *out; /* local strm->next_out */
unsigned char FAR *beg; /* inflate()'s initial strm->next_out */ unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
unsigned char FAR *end; /* while out < end, enough space available */ unsigned char FAR *end; /* while out < end, enough space available */

6
contrib/zlib/inffixed.h
View File

@ -2,9 +2,9 @@
* Generated automatically by makefixed(). * Generated automatically by makefixed().
*/ */
/* WARNING: this file should *not* be used by applications. It /* WARNING: this file should *not* be used by applications.
is part of the implementation of the compression library and It is part of the implementation of this library and is
is subject to change. Applications should only use zlib.h. subject to change. Applications should only use zlib.h.
*/ */
static const code lenfix[512] = { static const code lenfix[512] = {

136
contrib/zlib/inflate.c
View File

@ -1,5 +1,5 @@
/* inflate.c -- zlib decompression /* inflate.c -- zlib decompression
* Copyright (C) 1995-2010 Mark Adler * Copyright (C) 1995-2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -93,14 +93,15 @@
/* function prototypes */ /* function prototypes */
local void fixedtables OF((struct inflate_state FAR *state)); local void fixedtables OF((struct inflate_state FAR *state));
local int updatewindow OF((z_streamp strm, unsigned out)); local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
unsigned copy));
#ifdef BUILDFIXED #ifdef BUILDFIXED
void makefixed OF((void)); void makefixed OF((void));
#endif #endif
local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf, local unsigned syncsearch OF((unsigned FAR *have, const unsigned char FAR *buf,
unsigned len)); unsigned len));
int ZEXPORT inflateReset(strm) int ZEXPORT inflateResetKeep(strm)
z_streamp strm; z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
@ -109,15 +110,13 @@ z_streamp strm;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
strm->total_in = strm->total_out = state->total = 0; strm->total_in = strm->total_out = state->total = 0;
strm->msg = Z_NULL; strm->msg = Z_NULL;
strm->adler = 1; /* to support ill-conceived Java test suite */ if (state->wrap) /* to support ill-conceived Java test suite */
strm->adler = state->wrap & 1;
state->mode = HEAD; state->mode = HEAD;
state->last = 0; state->last = 0;
state->havedict = 0; state->havedict = 0;
state->dmax = 32768U; state->dmax = 32768U;
state->head = Z_NULL; state->head = Z_NULL;
state->wsize = 0;
state->whave = 0;
state->wnext = 0;
state->hold = 0; state->hold = 0;
state->bits = 0; state->bits = 0;
state->lencode = state->distcode = state->next = state->codes; state->lencode = state->distcode = state->next = state->codes;
@ -127,6 +126,19 @@ z_streamp strm;
return Z_OK; return Z_OK;
} }
int ZEXPORT inflateReset(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
state->wsize = 0;
state->whave = 0;
state->wnext = 0;
return inflateResetKeep(strm);
}
int ZEXPORT inflateReset2(strm, windowBits) int ZEXPORT inflateReset2(strm, windowBits)
z_streamp strm; z_streamp strm;
int windowBits; int windowBits;
@ -180,10 +192,19 @@ int stream_size;
if (strm == Z_NULL) return Z_STREAM_ERROR; if (strm == Z_NULL) return Z_STREAM_ERROR;
strm->msg = Z_NULL; /* in case we return an error */ strm->msg = Z_NULL; /* in case we return an error */
if (strm->zalloc == (alloc_func)0) { if (strm->zalloc == (alloc_func)0) {
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zalloc = zcalloc; strm->zalloc = zcalloc;
strm->opaque = (voidpf)0; strm->opaque = (voidpf)0;
#endif
} }
if (strm->zfree == (free_func)0) strm->zfree = zcfree; if (strm->zfree == (free_func)0)
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zfree = zcfree;
#endif
state = (struct inflate_state FAR *) state = (struct inflate_state FAR *)
ZALLOC(strm, 1, sizeof(struct inflate_state)); ZALLOC(strm, 1, sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR; if (state == Z_NULL) return Z_MEM_ERROR;
@ -321,8 +342,8 @@ void makefixed()
low = 0; low = 0;
for (;;) { for (;;) {
if ((low % 7) == 0) printf("\n "); if ((low % 7) == 0) printf("\n ");
printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits, printf("{%u,%u,%d}", (low & 127) == 99 ? 64 : state.lencode[low].op,
state.lencode[low].val); state.lencode[low].bits, state.lencode[low].val);
if (++low == size) break; if (++low == size) break;
putchar(','); putchar(',');
} }
@ -355,12 +376,13 @@ void makefixed()
output will fall in the output data, making match copies simpler and faster. output will fall in the output data, making match copies simpler and faster.
The advantage may be dependent on the size of the processor's data caches. The advantage may be dependent on the size of the processor's data caches.
*/ */
local int updatewindow(strm, out) local int updatewindow(strm, end, copy)
z_streamp strm; z_streamp strm;
unsigned out; const Bytef *end;
unsigned copy;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
unsigned copy, dist; unsigned dist;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
@ -380,19 +402,18 @@ unsigned out;
} }
/* copy state->wsize or less output bytes into the circular window */ /* copy state->wsize or less output bytes into the circular window */
copy = out - strm->avail_out;
if (copy >= state->wsize) { if (copy >= state->wsize) {
zmemcpy(state->window, strm->next_out - state->wsize, state->wsize); zmemcpy(state->window, end - state->wsize, state->wsize);
state->wnext = 0; state->wnext = 0;
state->whave = state->wsize; state->whave = state->wsize;
} }
else { else {
dist = state->wsize - state->wnext; dist = state->wsize - state->wnext;
if (dist > copy) dist = copy; if (dist > copy) dist = copy;
zmemcpy(state->window + state->wnext, strm->next_out - copy, dist); zmemcpy(state->window + state->wnext, end - copy, dist);
copy -= dist; copy -= dist;
if (copy) { if (copy) {
zmemcpy(state->window, strm->next_out - copy, copy); zmemcpy(state->window, end - copy, copy);
state->wnext = copy; state->wnext = copy;
state->whave = state->wsize; state->whave = state->wsize;
} }
@ -499,11 +520,6 @@ unsigned out;
bits -= bits & 7; \ bits -= bits & 7; \
} while (0) } while (0)
/* Reverse the bytes in a 32-bit value */
#define REVERSE(q) \
((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
/* /*
inflate() uses a state machine to process as much input data and generate as inflate() uses a state machine to process as much input data and generate as
much output data as possible before returning. The state machine is much output data as possible before returning. The state machine is
@ -591,7 +607,7 @@ z_streamp strm;
int flush; int flush;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
unsigned char FAR *next; /* next input */ z_const unsigned char FAR *next; /* next input */
unsigned char FAR *put; /* next output */ unsigned char FAR *put; /* next output */
unsigned have, left; /* available input and output */ unsigned have, left; /* available input and output */
unsigned long hold; /* bit buffer */ unsigned long hold; /* bit buffer */
@ -797,7 +813,7 @@ int flush;
#endif #endif
case DICTID: case DICTID:
NEEDBITS(32); NEEDBITS(32);
strm->adler = state->check = REVERSE(hold); strm->adler = state->check = ZSWAP32(hold);
INITBITS(); INITBITS();
state->mode = DICT; state->mode = DICT;
case DICT: case DICT:
@ -905,7 +921,7 @@ int flush;
while (state->have < 19) while (state->have < 19)
state->lens[order[state->have++]] = 0; state->lens[order[state->have++]] = 0;
state->next = state->codes; state->next = state->codes;
state->lencode = (code const FAR *)(state->next); state->lencode = (const code FAR *)(state->next);
state->lenbits = 7; state->lenbits = 7;
ret = inflate_table(CODES, state->lens, 19, &(state->next), ret = inflate_table(CODES, state->lens, 19, &(state->next),
&(state->lenbits), state->work); &(state->lenbits), state->work);
@ -925,7 +941,6 @@ int flush;
PULLBYTE(); PULLBYTE();
} }
if (here.val < 16) { if (here.val < 16) {
NEEDBITS(here.bits);
DROPBITS(here.bits); DROPBITS(here.bits);
state->lens[state->have++] = here.val; state->lens[state->have++] = here.val;
} }
@ -980,7 +995,7 @@ int flush;
values here (9 and 6) without reading the comments in inftrees.h values here (9 and 6) without reading the comments in inftrees.h
concerning the ENOUGH constants, which depend on those values */ concerning the ENOUGH constants, which depend on those values */
state->next = state->codes; state->next = state->codes;
state->lencode = (code const FAR *)(state->next); state->lencode = (const code FAR *)(state->next);
state->lenbits = 9; state->lenbits = 9;
ret = inflate_table(LENS, state->lens, state->nlen, &(state->next), ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
&(state->lenbits), state->work); &(state->lenbits), state->work);
@ -989,7 +1004,7 @@ int flush;
state->mode = BAD; state->mode = BAD;
break; break;
} }
state->distcode = (code const FAR *)(state->next); state->distcode = (const code FAR *)(state->next);
state->distbits = 6; state->distbits = 6;
ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist, ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
&(state->next), &(state->distbits), state->work); &(state->next), &(state->distbits), state->work);
@ -1170,7 +1185,7 @@ int flush;
#ifdef GUNZIP #ifdef GUNZIP
state->flags ? hold : state->flags ? hold :
#endif #endif
REVERSE(hold)) != state->check) { ZSWAP32(hold)) != state->check) {
strm->msg = (char *)"incorrect data check"; strm->msg = (char *)"incorrect data check";
state->mode = BAD; state->mode = BAD;
break; break;
@ -1214,8 +1229,9 @@ int flush;
*/ */
inf_leave: inf_leave:
RESTORE(); RESTORE();
if (state->wsize || (state->mode < CHECK && out != strm->avail_out)) if (state->wsize || (out != strm->avail_out && state->mode < BAD &&
if (updatewindow(strm, out)) { (state->mode < CHECK || flush != Z_FINISH)))
if (updatewindow(strm, strm->next_out, out - strm->avail_out)) {
state->mode = MEM; state->mode = MEM;
return Z_MEM_ERROR; return Z_MEM_ERROR;
} }
@ -1249,13 +1265,37 @@ z_streamp strm;
return Z_OK; return Z_OK;
} }
int ZEXPORT inflateGetDictionary(strm, dictionary, dictLength)
z_streamp strm;
Bytef *dictionary;
uInt *dictLength;
{
struct inflate_state FAR *state;
/* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
/* copy dictionary */
if (state->whave && dictionary != Z_NULL) {
zmemcpy(dictionary, state->window + state->wnext,
state->whave - state->wnext);
zmemcpy(dictionary + state->whave - state->wnext,
state->window, state->wnext);
}
if (dictLength != Z_NULL)
*dictLength = state->whave;
return Z_OK;
}
int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength) int ZEXPORT inflateSetDictionary(strm, dictionary, dictLength)
z_streamp strm; z_streamp strm;
const Bytef *dictionary; const Bytef *dictionary;
uInt dictLength; uInt dictLength;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
unsigned long id; unsigned long dictid;
int ret;
/* check state */ /* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
@ -1263,29 +1303,21 @@ uInt dictLength;
if (state->wrap != 0 && state->mode != DICT) if (state->wrap != 0 && state->mode != DICT)
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
/* check for correct dictionary id */ /* check for correct dictionary identifier */
if (state->mode == DICT) { if (state->mode == DICT) {
id = adler32(0L, Z_NULL, 0); dictid = adler32(0L, Z_NULL, 0);
id = adler32(id, dictionary, dictLength); dictid = adler32(dictid, dictionary, dictLength);
if (id != state->check) if (dictid != state->check)
return Z_DATA_ERROR; return Z_DATA_ERROR;
} }
/* copy dictionary to window */ /* copy dictionary to window using updatewindow(), which will amend the
if (updatewindow(strm, strm->avail_out)) { existing dictionary if appropriate */
ret = updatewindow(strm, dictionary + dictLength, dictLength);
if (ret) {
state->mode = MEM; state->mode = MEM;
return Z_MEM_ERROR; return Z_MEM_ERROR;
} }
if (dictLength > state->wsize) {
zmemcpy(state->window, dictionary + dictLength - state->wsize,
state->wsize);
state->whave = state->wsize;
}
else {
zmemcpy(state->window + state->wsize - dictLength, dictionary,
dictLength);
state->whave = dictLength;
}
state->havedict = 1; state->havedict = 1;
Tracev((stderr, "inflate: dictionary set\n")); Tracev((stderr, "inflate: dictionary set\n"));
return Z_OK; return Z_OK;
@ -1321,7 +1353,7 @@ gz_headerp head;
*/ */
local unsigned syncsearch(have, buf, len) local unsigned syncsearch(have, buf, len)
unsigned FAR *have; unsigned FAR *have;
unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; unsigned len;
{ {
unsigned got; unsigned got;
@ -1433,8 +1465,8 @@ z_streamp source;
} }
/* copy state */ /* copy state */
zmemcpy(dest, source, sizeof(z_stream)); zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
zmemcpy(copy, state, sizeof(struct inflate_state)); zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state));
if (state->lencode >= state->codes && if (state->lencode >= state->codes &&
state->lencode <= state->codes + ENOUGH - 1) { state->lencode <= state->codes + ENOUGH - 1) {
copy->lencode = copy->codes + (state->lencode - state->codes); copy->lencode = copy->codes + (state->lencode - state->codes);

48
contrib/zlib/inftrees.c
View File

@ -1,5 +1,5 @@
/* inftrees.c -- generate Huffman trees for efficient decoding /* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2010 Mark Adler * Copyright (C) 1995-2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -9,7 +9,7 @@
#define MAXBITS 15 #define MAXBITS 15
const char inflate_copyright[] = const char inflate_copyright[] =
" inflate 1.2.5 Copyright 1995-2010 Mark Adler "; " inflate 1.2.8 Copyright 1995-2013 Mark Adler ";
/* /*
If you use the zlib library in a product, an acknowledgment is welcome If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot in the documentation of your product. If for some reason you cannot
@ -62,7 +62,7 @@ unsigned short FAR *work;
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
static const unsigned short lext[31] = { /* Length codes 257..285 extra */ static const unsigned short lext[31] = { /* Length codes 257..285 extra */
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 73, 195}; 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78};
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */ static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@ -208,8 +208,8 @@ unsigned short FAR *work;
mask = used - 1; /* mask for comparing low */ mask = used - 1; /* mask for comparing low */
/* check available table space */ /* check available table space */
if ((type == LENS && used >= ENOUGH_LENS) || if ((type == LENS && used > ENOUGH_LENS) ||
(type == DISTS && used >= ENOUGH_DISTS)) (type == DISTS && used > ENOUGH_DISTS))
return 1; return 1;
/* process all codes and make table entries */ /* process all codes and make table entries */
@ -277,8 +277,8 @@ unsigned short FAR *work;
/* check for enough space */ /* check for enough space */
used += 1U << curr; used += 1U << curr;
if ((type == LENS && used >= ENOUGH_LENS) || if ((type == LENS && used > ENOUGH_LENS) ||
(type == DISTS && used >= ENOUGH_DISTS)) (type == DISTS && used > ENOUGH_DISTS))
return 1; return 1;
/* point entry in root table to sub-table */ /* point entry in root table to sub-table */
@ -289,38 +289,14 @@ unsigned short FAR *work;
} }
} }
/* /* fill in remaining table entry if code is incomplete (guaranteed to have
Fill in rest of table for incomplete codes. This loop is similar to the at most one remaining entry, since if the code is incomplete, the
loop above in incrementing huff for table indices. It is assumed that maximum code length that was allowed to get this far is one bit) */
len is equal to curr + drop, so there is no loop needed to increment if (huff != 0) {
through high index bits. When the current sub-table is filled, the loop
drops back to the root table to fill in any remaining entries there.
*/
here.op = (unsigned char)64; /* invalid code marker */ here.op = (unsigned char)64; /* invalid code marker */
here.bits = (unsigned char)(len - drop); here.bits = (unsigned char)(len - drop);
here.val = (unsigned short)0; here.val = (unsigned short)0;
while (huff != 0) { next[huff] = here;
/* when done with sub-table, drop back to root table */
if (drop != 0 && (huff & mask) != low) {
drop = 0;
len = root;
next = *table;
here.bits = (unsigned char)len;
}
/* put invalid code marker in table */
next[huff >> drop] = here;
/* backwards increment the len-bit code huff */
incr = 1U << (len - 1);
while (huff & incr)
incr >>= 1;
if (incr != 0) {
huff &= incr - 1;
huff += incr;
}
else
huff = 0;
} }
/* set return parameters */ /* set return parameters */

54
contrib/zlib/trees.c
View File

@ -1,5 +1,5 @@
/* trees.c -- output deflated data using Huffman coding /* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1995-2010 Jean-loup Gailly * Copyright (C) 1995-2012 Jean-loup Gailly
* detect_data_type() function provided freely by Cosmin Truta, 2006 * detect_data_type() function provided freely by Cosmin Truta, 2006
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -74,11 +74,6 @@ local const uch bl_order[BL_CODES]
* probability, to avoid transmitting the lengths for unused bit length codes. * probability, to avoid transmitting the lengths for unused bit length codes.
*/ */
#define Buf_size (8 * 2*sizeof(char))
/* Number of bits used within bi_buf. (bi_buf might be implemented on
* more than 16 bits on some systems.)
*/
/* =========================================================================== /* ===========================================================================
* Local data. These are initialized only once. * Local data. These are initialized only once.
*/ */
@ -151,8 +146,8 @@ local void send_tree OF((deflate_state *s, ct_data *tree, int max_code));
local int build_bl_tree OF((deflate_state *s)); local int build_bl_tree OF((deflate_state *s));
local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes, local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
int blcodes)); int blcodes));
local void compress_block OF((deflate_state *s, ct_data *ltree, local void compress_block OF((deflate_state *s, const ct_data *ltree,
ct_data *dtree)); const ct_data *dtree));
local int detect_data_type OF((deflate_state *s)); local int detect_data_type OF((deflate_state *s));
local unsigned bi_reverse OF((unsigned value, int length)); local unsigned bi_reverse OF((unsigned value, int length));
local void bi_windup OF((deflate_state *s)); local void bi_windup OF((deflate_state *s));
@ -399,7 +394,6 @@ void ZLIB_INTERNAL _tr_init(s)
s->bi_buf = 0; s->bi_buf = 0;
s->bi_valid = 0; s->bi_valid = 0;
s->last_eob_len = 8; /* enough lookahead for inflate */
#ifdef DEBUG #ifdef DEBUG
s->compressed_len = 0L; s->compressed_len = 0L;
s->bits_sent = 0L; s->bits_sent = 0L;
@ -882,16 +876,18 @@ void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last)
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */ copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
} }
/* ===========================================================================
* Flush the bits in the bit buffer to pending output (leaves at most 7 bits)
*/
void ZLIB_INTERNAL _tr_flush_bits(s)
deflate_state *s;
{
bi_flush(s);
}
/* =========================================================================== /* ===========================================================================
* Send one empty static block to give enough lookahead for inflate. * Send one empty static block to give enough lookahead for inflate.
* This takes 10 bits, of which 7 may remain in the bit buffer. * This takes 10 bits, of which 7 may remain in the bit buffer.
* The current inflate code requires 9 bits of lookahead. If the
* last two codes for the previous block (real code plus EOB) were coded
* on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
* the last real code. In this case we send two empty static blocks instead
* of one. (There are no problems if the previous block is stored or fixed.)
* To simplify the code, we assume the worst case of last real code encoded
* on one bit only.
*/ */
void ZLIB_INTERNAL _tr_align(s) void ZLIB_INTERNAL _tr_align(s)
deflate_state *s; deflate_state *s;
@ -902,20 +898,6 @@ void ZLIB_INTERNAL _tr_align(s)
s->compressed_len += 10L; /* 3 for block type, 7 for EOB */ s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
#endif #endif
bi_flush(s); bi_flush(s);
/* Of the 10 bits for the empty block, we have already sent
* (10 - bi_valid) bits. The lookahead for the last real code (before
* the EOB of the previous block) was thus at least one plus the length
* of the EOB plus what we have just sent of the empty static block.
*/
if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
send_bits(s, STATIC_TREES<<1, 3);
send_code(s, END_BLOCK, static_ltree);
#ifdef DEBUG
s->compressed_len += 10L;
#endif
bi_flush(s);
}
s->last_eob_len = 7;
} }
/* =========================================================================== /* ===========================================================================
@ -990,7 +972,8 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
} else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) { } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
#endif #endif
send_bits(s, (STATIC_TREES<<1)+last, 3); send_bits(s, (STATIC_TREES<<1)+last, 3);
compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree); compress_block(s, (const ct_data *)static_ltree,
(const ct_data *)static_dtree);
#ifdef DEBUG #ifdef DEBUG
s->compressed_len += 3 + s->static_len; s->compressed_len += 3 + s->static_len;
#endif #endif
@ -998,7 +981,8 @@ void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
send_bits(s, (DYN_TREES<<1)+last, 3); send_bits(s, (DYN_TREES<<1)+last, 3);
send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1, send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
max_blindex+1); max_blindex+1);
compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree); compress_block(s, (const ct_data *)s->dyn_ltree,
(const ct_data *)s->dyn_dtree);
#ifdef DEBUG #ifdef DEBUG
s->compressed_len += 3 + s->opt_len; s->compressed_len += 3 + s->opt_len;
#endif #endif
@ -1075,8 +1059,8 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc)
*/ */
local void compress_block(s, ltree, dtree) local void compress_block(s, ltree, dtree)
deflate_state *s; deflate_state *s;
ct_data *ltree; /* literal tree */ const ct_data *ltree; /* literal tree */
ct_data *dtree; /* distance tree */ const ct_data *dtree; /* distance tree */
{ {
unsigned dist; /* distance of matched string */ unsigned dist; /* distance of matched string */
int lc; /* match length or unmatched char (if dist == 0) */ int lc; /* match length or unmatched char (if dist == 0) */
@ -1118,7 +1102,6 @@ local void compress_block(s, ltree, dtree)
} while (lx < s->last_lit); } while (lx < s->last_lit);
send_code(s, END_BLOCK, ltree); send_code(s, END_BLOCK, ltree);
s->last_eob_len = ltree[END_BLOCK].Len;
} }
/* =========================================================================== /* ===========================================================================
@ -1226,7 +1209,6 @@ local void copy_block(s, buf, len, header)
int header; /* true if block header must be written */ int header; /* true if block header must be written */
{ {
bi_windup(s); /* align on byte boundary */ bi_windup(s); /* align on byte boundary */
s->last_eob_len = 8; /* enough lookahead for inflate */
if (header) { if (header) {
put_short(s, (ush)len); put_short(s, (ush)len);

59
contrib/zlib/uncompr.c 100644
View File

@ -0,0 +1,59 @@
/* uncompr.c -- decompress a memory buffer
* Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
#define ZLIB_INTERNAL
#include "zlib.h"
/* ===========================================================================
Decompresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total
size of the destination buffer, which must be large enough to hold the
entire uncompressed data. (The size of the uncompressed data must have
been saved previously by the compressor and transmitted to the decompressor
by some mechanism outside the scope of this compression library.)
Upon exit, destLen is the actual size of the compressed buffer.
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer, or Z_DATA_ERROR if the input data was corrupted.
*/
int ZEXPORT uncompress (dest, destLen, source, sourceLen)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong sourceLen;
{
z_stream stream;
int err;
stream.next_in = (z_const Bytef *)source;
stream.avail_in = (uInt)sourceLen;
/* Check for source > 64K on 16-bit machine: */
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
stream.next_out = dest;
stream.avail_out = (uInt)*destLen;
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
err = inflateInit(&stream);
if (err != Z_OK) return err;
err = inflate(&stream, Z_FINISH);
if (err != Z_STREAM_END) {
inflateEnd(&stream);
if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
return Z_DATA_ERROR;
return err;
}
*destLen = stream.total_out;
err = inflateEnd(&stream);
return err;
}

397
contrib/zlib/win32/DLL_FAQ.txt 100644
View File

@ -0,0 +1,397 @@
Frequently Asked Questions about ZLIB1.DLL
This document describes the design, the rationale, and the usage
of the official DLL build of zlib, named ZLIB1.DLL. If you have
general questions about zlib, you should see the file "FAQ" found
in the zlib distribution, or at the following location:
http://www.gzip.org/zlib/zlib_faq.html
1. What is ZLIB1.DLL, and how can I get it?
- ZLIB1.DLL is the official build of zlib as a DLL.
(Please remark the character '1' in the name.)
Pointers to a precompiled ZLIB1.DLL can be found in the zlib
web site at:
http://www.zlib.net/
Applications that link to ZLIB1.DLL can rely on the following
specification:
* The exported symbols are exclusively defined in the source
files "zlib.h" and "zlib.def", found in an official zlib
source distribution.
* The symbols are exported by name, not by ordinal.
* The exported names are undecorated.
* The calling convention of functions is "C" (CDECL).
* The ZLIB1.DLL binary is linked to MSVCRT.DLL.
The archive in which ZLIB1.DLL is bundled contains compiled
test programs that must run with a valid build of ZLIB1.DLL.
It is recommended to download the prebuilt DLL from the zlib
web site, instead of building it yourself, to avoid potential
incompatibilities that could be introduced by your compiler
and build settings. If you do build the DLL yourself, please
make sure that it complies with all the above requirements,
and it runs with the precompiled test programs, bundled with
the original ZLIB1.DLL distribution.
If, for any reason, you need to build an incompatible DLL,
please use a different file name.
2. Why did you change the name of the DLL to ZLIB1.DLL?
What happened to the old ZLIB.DLL?
- The old ZLIB.DLL, built from zlib-1.1.4 or earlier, required
compilation settings that were incompatible to those used by
a static build. The DLL settings were supposed to be enabled
by defining the macro ZLIB_DLL, before including "zlib.h".
Incorrect handling of this macro was silently accepted at
build time, resulting in two major problems:
* ZLIB_DLL was missing from the old makefile. When building
the DLL, not all people added it to the build options. In
consequence, incompatible incarnations of ZLIB.DLL started
to circulate around the net.
* When switching from using the static library to using the
DLL, applications had to define the ZLIB_DLL macro and
to recompile all the sources that contained calls to zlib
functions. Failure to do so resulted in creating binaries
that were unable to run with the official ZLIB.DLL build.
The only possible solution that we could foresee was to make
a binary-incompatible change in the DLL interface, in order to
remove the dependency on the ZLIB_DLL macro, and to release
the new DLL under a different name.
We chose the name ZLIB1.DLL, where '1' indicates the major
zlib version number. We hope that we will not have to break
the binary compatibility again, at least not as long as the
zlib-1.x series will last.
There is still a ZLIB_DLL macro, that can trigger a more
efficient build and use of the DLL, but compatibility no
longer dependents on it.
3. Can I build ZLIB.DLL from the new zlib sources, and replace
an old ZLIB.DLL, that was built from zlib-1.1.4 or earlier?
- In principle, you can do it by assigning calling convention
keywords to the macros ZEXPORT and ZEXPORTVA. In practice,
it depends on what you mean by "an old ZLIB.DLL", because the
old DLL exists in several mutually-incompatible versions.
You have to find out first what kind of calling convention is
being used in your particular ZLIB.DLL build, and to use the
same one in the new build. If you don't know what this is all
about, you might be better off if you would just leave the old
DLL intact.
4. Can I compile my application using the new zlib interface, and
link it to an old ZLIB.DLL, that was built from zlib-1.1.4 or
earlier?
- The official answer is "no"; the real answer depends again on
what kind of ZLIB.DLL you have. Even if you are lucky, this
course of action is unreliable.
If you rebuild your application and you intend to use a newer
version of zlib (post- 1.1.4), it is strongly recommended to
link it to the new ZLIB1.DLL.
5. Why are the zlib symbols exported by name, and not by ordinal?
- Although exporting symbols by ordinal is a little faster, it
is risky. Any single glitch in the maintenance or use of the
DEF file that contains the ordinals can result in incompatible
builds and frustrating crashes. Simply put, the benefits of
exporting symbols by ordinal do not justify the risks.
Technically, it should be possible to maintain ordinals in
the DEF file, and still export the symbols by name. Ordinals
exist in every DLL, and even if the dynamic linking performed
at the DLL startup is searching for names, ordinals serve as
hints, for a faster name lookup. However, if the DEF file
contains ordinals, the Microsoft linker automatically builds
an implib that will cause the executables linked to it to use
those ordinals, and not the names. It is interesting to
notice that the GNU linker for Win32 does not suffer from this
problem.
It is possible to avoid the DEF file if the exported symbols
are accompanied by a "__declspec(dllexport)" attribute in the
source files. You can do this in zlib by predefining the
ZLIB_DLL macro.
6. I see that the ZLIB1.DLL functions use the "C" (CDECL) calling
convention. Why not use the STDCALL convention?
STDCALL is the standard convention in Win32, and I need it in
my Visual Basic project!
(For readability, we use CDECL to refer to the convention
triggered by the "__cdecl" keyword, STDCALL to refer to
the convention triggered by "__stdcall", and FASTCALL to
refer to the convention triggered by "__fastcall".)
- Most of the native Windows API functions (without varargs) use
indeed the WINAPI convention (which translates to STDCALL in
Win32), but the standard C functions use CDECL. If a user
application is intrinsically tied to the Windows API (e.g.
it calls native Windows API functions such as CreateFile()),
sometimes it makes sense to decorate its own functions with
WINAPI. But if ANSI C or POSIX portability is a goal (e.g.
it calls standard C functions such as fopen()), it is not a
sound decision to request the inclusion of <windows.h>, or to
use non-ANSI constructs, for the sole purpose to make the user
functions STDCALL-able.
The functionality offered by zlib is not in the category of
"Windows functionality", but is more like "C functionality".
Technically, STDCALL is not bad; in fact, it is slightly
faster than CDECL, and it works with variable-argument
functions, just like CDECL. It is unfortunate that, in spite
of using STDCALL in the Windows API, it is not the default
convention used by the C compilers that run under Windows.
The roots of the problem reside deep inside the unsafety of
the K&R-style function prototypes, where the argument types
are not specified; but that is another story for another day.
The remaining fact is that CDECL is the default convention.
Even if an explicit convention is hard-coded into the function
prototypes inside C headers, problems may appear. The
necessity to expose the convention in users' callbacks is one
of these problems.
The calling convention issues are also important when using
zlib in other programming languages. Some of them, like Ada
(GNAT) and Fortran (GNU G77), have C bindings implemented
initially on Unix, and relying on the C calling convention.
On the other hand, the pre- .NET versions of Microsoft Visual
Basic require STDCALL, while Borland Delphi prefers, although
it does not require, FASTCALL.
In fairness to all possible uses of zlib outside the C
programming language, we choose the default "C" convention.
Anyone interested in different bindings or conventions is
encouraged to maintain specialized projects. The "contrib/"
directory from the zlib distribution already holds a couple
of foreign bindings, such as Ada, C++, and Delphi.
7. I need a DLL for my Visual Basic project. What can I do?
- Define the ZLIB_WINAPI macro before including "zlib.h", when
building both the DLL and the user application (except that
you don't need to define anything when using the DLL in Visual
Basic). The ZLIB_WINAPI macro will switch on the WINAPI
(STDCALL) convention. The name of this DLL must be different
than the official ZLIB1.DLL.
Gilles Vollant has contributed a build named ZLIBWAPI.DLL,
with the ZLIB_WINAPI macro turned on, and with the minizip
functionality built in. For more information, please read
the notes inside "contrib/vstudio/readme.txt", found in the
zlib distribution.
8. I need to use zlib in my Microsoft .NET project. What can I
do?
- Henrik Ravn has contributed a .NET wrapper around zlib. Look
into contrib/dotzlib/, inside the zlib distribution.
9. If my application uses ZLIB1.DLL, should I link it to
MSVCRT.DLL? Why?
- It is not required, but it is recommended to link your
application to MSVCRT.DLL, if it uses ZLIB1.DLL.
The executables (.EXE, .DLL, etc.) that are involved in the
same process and are using the C run-time library (i.e. they
are calling standard C functions), must link to the same
library. There are several libraries in the Win32 system:
CRTDLL.DLL, MSVCRT.DLL, the static C libraries, etc.
Since ZLIB1.DLL is linked to MSVCRT.DLL, the executables that
depend on it should also be linked to MSVCRT.DLL.
10. Why are you saying that ZLIB1.DLL and my application should
be linked to the same C run-time (CRT) library? I linked my
application and my DLLs to different C libraries (e.g. my
application to a static library, and my DLLs to MSVCRT.DLL),
and everything works fine.
- If a user library invokes only pure Win32 API (accessible via
<windows.h> and the related headers), its DLL build will work
in any context. But if this library invokes standard C API,
things get more complicated.
There is a single Win32 library in a Win32 system. Every
function in this library resides in a single DLL module, that
is safe to call from anywhere. On the other hand, there are
multiple versions of the C library, and each of them has its
own separate internal state. Standalone executables and user
DLLs that call standard C functions must link to a C run-time
(CRT) library, be it static or shared (DLL). Intermixing
occurs when an executable (not necessarily standalone) and a
DLL are linked to different CRTs, and both are running in the
same process.
Intermixing multiple CRTs is possible, as long as their
internal states are kept intact. The Microsoft Knowledge Base
articles KB94248 "HOWTO: Use the C Run-Time" and KB140584
"HOWTO: Link with the Correct C Run-Time (CRT) Library"
mention the potential problems raised by intermixing.
If intermixing works for you, it's because your application
and DLLs are avoiding the corruption of each of the CRTs'
internal states, maybe by careful design, or maybe by fortune.
Also note that linking ZLIB1.DLL to non-Microsoft CRTs, such
as those provided by Borland, raises similar problems.
11. Why are you linking ZLIB1.DLL to MSVCRT.DLL?
- MSVCRT.DLL exists on every Windows 95 with a new service pack
installed, or with Microsoft Internet Explorer 4 or later, and
on all other Windows 4.x or later (Windows 98, Windows NT 4,
or later). It is freely distributable; if not present in the
system, it can be downloaded from Microsoft or from other
software provider for free.
The fact that MSVCRT.DLL does not exist on a virgin Windows 95
is not so problematic. Windows 95 is scarcely found nowadays,
Microsoft ended its support a long time ago, and many recent
applications from various vendors, including Microsoft, do not
even run on it. Furthermore, no serious user should run
Windows 95 without a proper update installed.
12. Why are you not linking ZLIB1.DLL to
<<my favorite C run-time library>> ?
- We considered and abandoned the following alternatives:
* Linking ZLIB1.DLL to a static C library (LIBC.LIB, or
LIBCMT.LIB) is not a good option. People are using the DLL
mainly to save disk space. If you are linking your program
to a static C library, you may as well consider linking zlib
in statically, too.
* Linking ZLIB1.DLL to CRTDLL.DLL looks appealing, because
CRTDLL.DLL is present on every Win32 installation.
Unfortunately, it has a series of problems: it does not
work properly with Microsoft's C++ libraries, it does not
provide support for 64-bit file offsets, (and so on...),
and Microsoft discontinued its support a long time ago.
* Linking ZLIB1.DLL to MSVCR70.DLL or MSVCR71.DLL, supplied
with the Microsoft .NET platform, and Visual C++ 7.0/7.1,
raises problems related to the status of ZLIB1.DLL as a
system component. According to the Microsoft Knowledge Base
article KB326922 "INFO: Redistribution of the Shared C
Runtime Component in Visual C++ .NET", MSVCR70.DLL and
MSVCR71.DLL are not supposed to function as system DLLs,
because they may clash with MSVCRT.DLL. Instead, the
application's installer is supposed to put these DLLs
(if needed) in the application's private directory.
If ZLIB1.DLL depends on a non-system runtime, it cannot
function as a redistributable system component.
* Linking ZLIB1.DLL to non-Microsoft runtimes, such as
Borland's, or Cygwin's, raises problems related to the
reliable presence of these runtimes on Win32 systems.
It's easier to let the DLL build of zlib up to the people
who distribute these runtimes, and who may proceed as
explained in the answer to Question 14.
13. If ZLIB1.DLL cannot be linked to MSVCR70.DLL or MSVCR71.DLL,
how can I build/use ZLIB1.DLL in Microsoft Visual C++ 7.0
(Visual Studio .NET) or newer?
- Due to the problems explained in the Microsoft Knowledge Base
article KB326922 (see the previous answer), the C runtime that
comes with the VC7 environment is no longer considered a
system component. That is, it should not be assumed that this
runtime exists, or may be installed in a system directory.
Since ZLIB1.DLL is supposed to be a system component, it may
not depend on a non-system component.
In order to link ZLIB1.DLL and your application to MSVCRT.DLL
in VC7, you need the library of Visual C++ 6.0 or older. If
you don't have this library at hand, it's probably best not to
use ZLIB1.DLL.
We are hoping that, in the future, Microsoft will provide a
way to build applications linked to a proper system runtime,
from the Visual C++ environment. Until then, you have a
couple of alternatives, such as linking zlib in statically.
If your application requires dynamic linking, you may proceed
as explained in the answer to Question 14.
14. I need to link my own DLL build to a CRT different than
MSVCRT.DLL. What can I do?
- Feel free to rebuild the DLL from the zlib sources, and link
it the way you want. You should, however, clearly state that
your build is unofficial. You should give it a different file
name, and/or install it in a private directory that can be
accessed by your application only, and is not visible to the
others (i.e. it's neither in the PATH, nor in the SYSTEM or
SYSTEM32 directories). Otherwise, your build may clash with
applications that link to the official build.
For example, in Cygwin, zlib is linked to the Cygwin runtime
CYGWIN1.DLL, and it is distributed under the name CYGZ.DLL.
15. May I include additional pieces of code that I find useful,
link them in ZLIB1.DLL, and export them?
- No. A legitimate build of ZLIB1.DLL must not include code
that does not originate from the official zlib source code.
But you can make your own private DLL build, under a different
file name, as suggested in the previous answer.
For example, zlib is a part of the VCL library, distributed
with Borland Delphi and C++ Builder. The DLL build of VCL
is a redistributable file, named VCLxx.DLL.
16. May I remove some functionality out of ZLIB1.DLL, by enabling
macros like NO_GZCOMPRESS or NO_GZIP at compile time?
- No. A legitimate build of ZLIB1.DLL must provide the complete
zlib functionality, as implemented in the official zlib source
code. But you can make your own private DLL build, under a
different file name, as suggested in the previous answer.
17. I made my own ZLIB1.DLL build. Can I test it for compliance?
- We prefer that you download the official DLL from the zlib
web site. If you need something peculiar from this DLL, you
can send your suggestion to the zlib mailing list.
However, in case you do rebuild the DLL yourself, you can run
it with the test programs found in the DLL distribution.
Running these test programs is not a guarantee of compliance,
but a failure can imply a detected problem.
**
This document is written and maintained by
Cosmin Truta <cosmint@cs.ubbcluj.ro>

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# Makefile for zlib
# Borland C++ for Win32
#
# Usage:
# make -f win32/Makefile.bor
# make -f win32/Makefile.bor LOCAL_ZLIB=-DASMV OBJA=match.obj OBJPA=+match.obj
# ------------ Borland C++ ------------
# Optional nonstandard preprocessor flags (e.g. -DMAX_MEM_LEVEL=7)
# should be added to the environment via "set LOCAL_ZLIB=-DFOO" or
# added to the declaration of LOC here:
LOC = $(LOCAL_ZLIB)
CC = bcc32
AS = bcc32
LD = bcc32
AR = tlib
CFLAGS = -a -d -k- -O2 $(LOC)
ASFLAGS = $(LOC)
LDFLAGS = $(LOC)
# variables
ZLIB_LIB = zlib.lib
OBJ1 = adler32.obj compress.obj crc32.obj deflate.obj gzclose.obj gzlib.obj gzread.obj
OBJ2 = gzwrite.obj infback.obj inffast.obj inflate.obj inftrees.obj trees.obj uncompr.obj zutil.obj
#OBJA =
OBJP1 = +adler32.obj+compress.obj+crc32.obj+deflate.obj+gzclose.obj+gzlib.obj+gzread.obj
OBJP2 = +gzwrite.obj+infback.obj+inffast.obj+inflate.obj+inftrees.obj+trees.obj+uncompr.obj+zutil.obj
#OBJPA=
# targets
all: $(ZLIB_LIB) example.exe minigzip.exe
.c.obj:
$(CC) -c $(CFLAGS) $<
.asm.obj:
$(AS) -c $(ASFLAGS) $<
adler32.obj: adler32.c zlib.h zconf.h
compress.obj: compress.c zlib.h zconf.h
crc32.obj: crc32.c zlib.h zconf.h crc32.h
deflate.obj: deflate.c deflate.h zutil.h zlib.h zconf.h
gzclose.obj: gzclose.c zlib.h zconf.h gzguts.h
gzlib.obj: gzlib.c zlib.h zconf.h gzguts.h
gzread.obj: gzread.c zlib.h zconf.h gzguts.h
gzwrite.obj: gzwrite.c zlib.h zconf.h gzguts.h
infback.obj: infback.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inffast.obj: inffast.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h
inflate.obj: inflate.c zutil.h zlib.h zconf.h inftrees.h inflate.h \
inffast.h inffixed.h
inftrees.obj: inftrees.c zutil.h zlib.h zconf.h inftrees.h
trees.obj: trees.c zutil.h zlib.h zconf.h deflate.h trees.h
uncompr.obj: uncompr.c zlib.h zconf.h
zutil.obj: zutil.c zutil.h zlib.h zconf.h
example.obj: test/example.c zlib.h zconf.h
minigzip.obj: test/minigzip.c zlib.h zconf.h
# For the sake of the old Borland make,
# the command line is cut to fit in the MS-DOS 128 byte limit:
$(ZLIB_LIB): $(OBJ1) $(OBJ2) $(OBJA)
-del $(ZLIB_LIB)
$(AR) $(ZLIB_LIB) $(OBJP1)
$(AR) $(ZLIB_LIB) $(OBJP2)
$(AR) $(ZLIB_LIB) $(OBJPA)
# testing
test: example.exe minigzip.exe
example
echo hello world | minigzip | minigzip -d
example.exe: example.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) example.obj $(ZLIB_LIB)
minigzip.exe: minigzip.obj $(ZLIB_LIB)
$(LD) $(LDFLAGS) minigzip.obj $(ZLIB_LIB)
# cleanup
clean:
-del $(ZLIB_LIB)
-del *.obj
-del *.exe
-del *.tds
-del zlib.bak
-del foo.gz

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# Makefile for zlib, derived from Makefile.dj2.
# Modified for mingw32 by C. Spieler, 6/16/98.
# Updated for zlib 1.2.x by Christian Spieler and Cosmin Truta, Mar-2003.
# Last updated: Mar 2012.
# Tested under Cygwin and MinGW.
# Copyright (C) 1995-2003 Jean-loup Gailly.
# For conditions of distribution and use, see copyright notice in zlib.h
# To compile, or to compile and test, type from the top level zlib directory:
#
# make -fwin32/Makefile.gcc; make test testdll -fwin32/Makefile.gcc
#
# To use the asm code, type:
# cp contrib/asm?86/match.S ./match.S
# make LOC=-DASMV OBJA=match.o -fwin32/Makefile.gcc
#
# To install libz.a, zconf.h and zlib.h in the system directories, type:
#
# make install -fwin32/Makefile.gcc
#
# BINARY_PATH, INCLUDE_PATH and LIBRARY_PATH must be set.
#
# To install the shared lib, append SHARED_MODE=1 to the make command :
#
# make install -fwin32/Makefile.gcc SHARED_MODE=1
# Note:
# If the platform is *not* MinGW (e.g. it is Cygwin or UWIN),
# the DLL name should be changed from "zlib1.dll".
STATICLIB = libz.a
SHAREDLIB = zlib1.dll
IMPLIB = libz.dll.a
#
# Set to 1 if shared object needs to be installed
#
SHARED_MODE=0
#LOC = -DASMV
#LOC = -DDEBUG -g
PREFIX =
CC = $(PREFIX)gcc
CFLAGS = $(LOC) -O3 -Wall
AS = $(CC)
ASFLAGS = $(LOC) -Wall
LD = $(CC)
LDFLAGS = $(LOC)
AR = $(PREFIX)ar
ARFLAGS = rcs
RC = $(PREFIX)windres
RCFLAGS = --define GCC_WINDRES
STRIP = $(PREFIX)strip
CP = cp -fp
# If GNU install is available, replace $(CP) with install.
INSTALL = $(CP)
RM = rm -f
prefix ?= /usr/local
exec_prefix = $(prefix)
OBJS = adler32.o compress.o crc32.o deflate.o gzclose.o gzlib.o gzread.o \
gzwrite.o infback.o inffast.o inflate.o inftrees.o trees.o uncompr.o zutil.o
OBJA =
all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) example.exe minigzip.exe example_d.exe minigzip_d.exe
test: example.exe minigzip.exe
./example
echo hello world | ./minigzip | ./minigzip -d
testdll: example_d.exe minigzip_d.exe
./example_d
echo hello world | ./minigzip_d | ./minigzip_d -d
.c.o:
$(CC) $(CFLAGS) -c -o $@ $<
.S.o:
$(AS) $(ASFLAGS) -c -o $@ $<
$(STATICLIB): $(OBJS) $(OBJA)
$(AR) $(ARFLAGS) $@ $(OBJS) $(OBJA)
$(IMPLIB): $(SHAREDLIB)
$(SHAREDLIB): win32/zlib.def $(OBJS) $(OBJA) zlibrc.o
$(CC) -shared -Wl,--out-implib,$(IMPLIB) $(LDFLAGS) \
-o $@ win32/zlib.def $(OBJS) $(OBJA) zlibrc.o
$(STRIP) $@
example.exe: example.o $(STATICLIB)
$(LD) $(LDFLAGS) -o $@ example.o $(STATICLIB)
$(STRIP) $@
minigzip.exe: minigzip.o $(STATICLIB)
$(LD) $(LDFLAGS) -o $@ minigzip.o $(STATICLIB)
$(STRIP) $@
example_d.exe: example.o $(IMPLIB)
$(LD) $(LDFLAGS) -o $@ example.o $(IMPLIB)
$(STRIP) $@
minigzip_d.exe: minigzip.o $(IMPLIB)
$(LD) $(LDFLAGS) -o $@ minigzip.o $(IMPLIB)
$(STRIP) $@
example.o: test/example.c zlib.h zconf.h
$(CC) $(CFLAGS) -I. -c -o $@ test/example.c
minigzip.o: test/minigzip.c zlib.h zconf.h
$(CC) $(CFLAGS) -I. -c -o $@ test/minigzip.c
zlibrc.o: win32/zlib1.rc
$(RC) $(RCFLAGS) -o $@ win32/zlib1.rc
.PHONY: install uninstall clean
install: zlib.h zconf.h $(STATICLIB) $(IMPLIB)
@if test -z "$(DESTDIR)$(INCLUDE_PATH)" -o -z "$(DESTDIR)$(LIBRARY_PATH)" -o -z "$(DESTDIR)$(BINARY_PATH)"; then \
echo INCLUDE_PATH, LIBRARY_PATH, and BINARY_PATH must be specified; \
exit 1; \
fi
-@mkdir -p '$(DESTDIR)$(INCLUDE_PATH)'
-@mkdir -p '$(DESTDIR)$(LIBRARY_PATH)' '$(DESTDIR)$(LIBRARY_PATH)'/pkgconfig
-if [ "$(SHARED_MODE)" = "1" ]; then \
mkdir -p '$(DESTDIR)$(BINARY_PATH)'; \
$(INSTALL) $(SHAREDLIB) '$(DESTDIR)$(BINARY_PATH)'; \
$(INSTALL) $(IMPLIB) '$(DESTDIR)$(LIBRARY_PATH)'; \
fi
-$(INSTALL) zlib.h '$(DESTDIR)$(INCLUDE_PATH)'
-$(INSTALL) zconf.h '$(DESTDIR)$(INCLUDE_PATH)'
-$(INSTALL) $(STATICLIB) '$(DESTDIR)$(LIBRARY_PATH)'
sed \
-e 's|@prefix@|${prefix}|g' \
-e 's|@exec_prefix@|${exec_prefix}|g' \
-e 's|@libdir@|$(LIBRARY_PATH)|g' \
-e 's|@sharedlibdir@|$(LIBRARY_PATH)|g' \
-e 's|@includedir@|$(INCLUDE_PATH)|g' \
-e 's|@VERSION@|'`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' zlib.h`'|g' \
zlib.pc.in > '$(DESTDIR)$(LIBRARY_PATH)'/pkgconfig/zlib.pc
uninstall:
-if [ "$(SHARED_MODE)" = "1" ]; then \
$(RM) '$(DESTDIR)$(BINARY_PATH)'/$(SHAREDLIB); \
$(RM) '$(DESTDIR)$(LIBRARY_PATH)'/$(IMPLIB); \
fi
-$(RM) '$(DESTDIR)$(INCLUDE_PATH)'/zlib.h
-$(RM) '$(DESTDIR)$(INCLUDE_PATH)'/zconf.h
-$(RM) '$(DESTDIR)$(LIBRARY_PATH)'/$(STATICLIB)
clean:
-$(RM) $(STATICLIB)
-$(RM) $(SHAREDLIB)
-$(RM) $(IMPLIB)
-$(RM) *.o
-$(RM) *.exe
-$(RM) foo.gz
adler32.o: zlib.h zconf.h
compress.o: zlib.h zconf.h
crc32.o: crc32.h zlib.h zconf.h
deflate.o: deflate.h zutil.h zlib.h zconf.h
gzclose.o: zlib.h zconf.h gzguts.h
gzlib.o: zlib.h zconf.h gzguts.h
gzread.o: zlib.h zconf.h gzguts.h
gzwrite.o: zlib.h zconf.h gzguts.h
inffast.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inflate.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
infback.o: zutil.h zlib.h zconf.h inftrees.h inflate.h inffast.h
inftrees.o: zutil.h zlib.h zconf.h inftrees.h
trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
uncompr.o: zlib.h zconf.h
zutil.o: zutil.h zlib.h zconf.h

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# Makefile for zlib using Microsoft (Visual) C
# zlib is copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
#
# Usage:
# nmake -f win32/Makefile.msc (standard build)
# nmake -f win32/Makefile.msc LOC=-DFOO (nonstandard build)
# nmake -f win32/Makefile.msc LOC="-DASMV -DASMINF" \
# OBJA="inffas32.obj match686.obj" (use ASM code, x86)
# nmake -f win32/Makefile.msc AS=ml64 LOC="-DASMV -DASMINF -I." \
# OBJA="inffasx64.obj gvmat64.obj inffas8664.obj" (use ASM code, x64)
# The toplevel directory of the source tree.
#
TOP = .
# optional build flags
LOC =
# variables
STATICLIB = zlib.lib
SHAREDLIB = zlib1.dll
IMPLIB = zdll.lib
CC = cl
AS = ml
LD = link
AR = lib
RC = rc
CFLAGS = -nologo -MD -W3 -O2 -Oy- -Zi -Fd"zlib" $(LOC)
WFLAGS = -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE
ASFLAGS = -coff -Zi $(LOC)
LDFLAGS = -nologo -debug -incremental:no -opt:ref
ARFLAGS = -nologo
RCFLAGS = /dWIN32 /r
OBJS = adler32.obj compress.obj crc32.obj deflate.obj gzclose.obj gzlib.obj gzread.obj \
gzwrite.obj infback.obj inflate.obj inftrees.obj inffast.obj trees.obj uncompr.obj zutil.obj
OBJA =
# targets
all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) \
example.exe minigzip.exe example_d.exe minigzip_d.exe
$(STATICLIB): $(OBJS) $(OBJA)
$(AR) $(ARFLAGS) -out:$@ $(OBJS) $(OBJA)
$(IMPLIB): $(SHAREDLIB)
$(SHAREDLIB): $(TOP)/win32/zlib.def $(OBJS) $(OBJA) zlib1.res
$(LD) $(LDFLAGS) -def:$(TOP)/win32/zlib.def -dll -implib:$(IMPLIB) \
-out:$@ -base:0x5A4C0000 $(OBJS) $(OBJA) zlib1.res
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;2
example.exe: example.obj $(STATICLIB)
$(LD) $(LDFLAGS) example.obj $(STATICLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
minigzip.exe: minigzip.obj $(STATICLIB)
$(LD) $(LDFLAGS) minigzip.obj $(STATICLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
example_d.exe: example.obj $(IMPLIB)
$(LD) $(LDFLAGS) -out:$@ example.obj $(IMPLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
minigzip_d.exe: minigzip.obj $(IMPLIB)
$(LD) $(LDFLAGS) -out:$@ minigzip.obj $(IMPLIB)
if exist $@.manifest \
mt -nologo -manifest $@.manifest -outputresource:$@;1
{$(TOP)}.c.obj:
$(CC) -c $(WFLAGS) $(CFLAGS) $<
{$(TOP)/test}.c.obj:
$(CC) -c -I$(TOP) $(WFLAGS) $(CFLAGS) $<
{$(TOP)/contrib/masmx64}.c.obj:
$(CC) -c $(WFLAGS) $(CFLAGS) $<
{$(TOP)/contrib/masmx64}.asm.obj:
$(AS) -c $(ASFLAGS) $<
{$(TOP)/contrib/masmx86}.asm.obj:
$(AS) -c $(ASFLAGS) $<
adler32.obj: $(TOP)/adler32.c $(TOP)/zlib.h $(TOP)/zconf.h
compress.obj: $(TOP)/compress.c $(TOP)/zlib.h $(TOP)/zconf.h
crc32.obj: $(TOP)/crc32.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/crc32.h
deflate.obj: $(TOP)/deflate.c $(TOP)/deflate.h $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h
gzclose.obj: $(TOP)/gzclose.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzlib.obj: $(TOP)/gzlib.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzread.obj: $(TOP)/gzread.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
gzwrite.obj: $(TOP)/gzwrite.c $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/gzguts.h
infback.obj: $(TOP)/infback.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h $(TOP)/inffixed.h
inffast.obj: $(TOP)/inffast.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h
inflate.obj: $(TOP)/inflate.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h $(TOP)/inflate.h \
$(TOP)/inffast.h $(TOP)/inffixed.h
inftrees.obj: $(TOP)/inftrees.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/inftrees.h
trees.obj: $(TOP)/trees.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h $(TOP)/deflate.h $(TOP)/trees.h
uncompr.obj: $(TOP)/uncompr.c $(TOP)/zlib.h $(TOP)/zconf.h
zutil.obj: $(TOP)/zutil.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h
gvmat64.obj: $(TOP)/contrib\masmx64\gvmat64.asm
inffasx64.obj: $(TOP)/contrib\masmx64\inffasx64.asm
inffas8664.obj: $(TOP)/contrib\masmx64\inffas8664.c $(TOP)/zutil.h $(TOP)/zlib.h $(TOP)/zconf.h \
$(TOP)/inftrees.h $(TOP)/inflate.h $(TOP)/inffast.h
inffas32.obj: $(TOP)/contrib\masmx86\inffas32.asm
match686.obj: $(TOP)/contrib\masmx86\match686.asm
example.obj: $(TOP)/test/example.c $(TOP)/zlib.h $(TOP)/zconf.h
minigzip.obj: $(TOP)/test/minigzip.c $(TOP)/zlib.h $(TOP)/zconf.h
zlib1.res: $(TOP)/win32/zlib1.rc
$(RC) $(RCFLAGS) /fo$@ $(TOP)/win32/zlib1.rc
# testing
test: example.exe minigzip.exe
example
echo hello world | minigzip | minigzip -d
testdll: example_d.exe minigzip_d.exe
example_d
echo hello world | minigzip_d | minigzip_d -d
# cleanup
clean:
-del $(STATICLIB)
-del $(SHAREDLIB)
-del $(IMPLIB)
-del *.obj
-del *.res
-del *.exp
-del *.exe
-del *.pdb
-del *.manifest
-del foo.gz

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ZLIB DATA COMPRESSION LIBRARY
zlib 1.2.8 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
and rfc1952.txt (gzip format).
All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact zlib@gzip.org). Two compiled
examples are distributed in this package, example and minigzip. The example_d
and minigzip_d flavors validate that the zlib1.dll file is working correctly.
Questions about zlib should be sent to <zlib@gzip.org>. The zlib home page
is http://zlib.net/ . Before reporting a problem, please check this site to
verify that you have the latest version of zlib; otherwise get the latest
version and check whether the problem still exists or not.
PLEASE read DLL_FAQ.txt, and the the zlib FAQ http://zlib.net/zlib_faq.html
before asking for help.
Manifest:
The package zlib-1.2.8-win32-x86.zip will contain the following files:
README-WIN32.txt This document
ChangeLog Changes since previous zlib packages
DLL_FAQ.txt Frequently asked questions about zlib1.dll
zlib.3.pdf Documentation of this library in Adobe Acrobat format
example.exe A statically-bound example (using zlib.lib, not the dll)
example.pdb Symbolic information for debugging example.exe
example_d.exe A zlib1.dll bound example (using zdll.lib)
example_d.pdb Symbolic information for debugging example_d.exe
minigzip.exe A statically-bound test program (using zlib.lib, not the dll)
minigzip.pdb Symbolic information for debugging minigzip.exe
minigzip_d.exe A zlib1.dll bound test program (using zdll.lib)
minigzip_d.pdb Symbolic information for debugging minigzip_d.exe
zlib.h Install these files into the compilers' INCLUDE path to
zconf.h compile programs which use zlib.lib or zdll.lib
zdll.lib Install these files into the compilers' LIB path if linking
zdll.exp a compiled program to the zlib1.dll binary
zlib.lib Install these files into the compilers' LIB path to link zlib
zlib.pdb into compiled programs, without zlib1.dll runtime dependency
(zlib.pdb provides debugging info to the compile time linker)
zlib1.dll Install this binary shared library into the system PATH, or
the program's runtime directory (where the .exe resides)
zlib1.pdb Install in the same directory as zlib1.dll, in order to debug
an application crash using WinDbg or similar tools.
All .pdb files above are entirely optional, but are very useful to a developer
attempting to diagnose program misbehavior or a crash. Many additional
important files for developers can be found in the zlib127.zip source package
available from http://zlib.net/ - review that package's README file for details.
Acknowledgments:
The deflate format used by zlib was defined by Phil Katz. The deflate and
zlib specifications were written by L. Peter Deutsch. Thanks to all the
people who reported problems and suggested various improvements in zlib; they
are too numerous to cite here.
Copyright notice:
(C) 1995-2012 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly Mark Adler
jloup@gzip.org madler@alumni.caltech.edu
If you use the zlib library in a product, we would appreciate *not* receiving
lengthy legal documents to sign. The sources are provided for free but without
warranty of any kind. The library has been entirely written by Jean-loup
Gailly and Mark Adler; it does not include third-party code.
If you redistribute modified sources, we would appreciate that you include in
the file ChangeLog history information documenting your changes. Please read
the FAQ for more information on the distribution of modified source versions.

3
contrib/zlib/win32/VisualC.txt 100644
View File

@ -0,0 +1,3 @@
To build zlib using the Microsoft Visual C++ environment,
use the appropriate project from the projects/ directory.

86
contrib/zlib/win32/zlib.def 100644
View File

@ -0,0 +1,86 @@
; zlib data compression library
EXPORTS
; basic functions
zlibVersion
deflate
deflateEnd
inflate
inflateEnd
; advanced functions
deflateSetDictionary
deflateCopy
deflateReset
deflateParams
deflateTune
deflateBound
deflatePending
deflatePrime
deflateSetHeader
inflateSetDictionary
inflateGetDictionary
inflateSync
inflateCopy
inflateReset
inflateReset2
inflatePrime
inflateMark
inflateGetHeader
inflateBack
inflateBackEnd
zlibCompileFlags
; utility functions
compress
compress2
compressBound
uncompress
gzopen
gzdopen
gzbuffer
gzsetparams
gzread
gzwrite
gzprintf
gzvprintf
gzputs
gzgets
gzputc
gzgetc
gzungetc
gzflush
gzseek
gzrewind
gztell
gzoffset
gzeof
gzdirect
gzclose
gzclose_r
gzclose_w
gzerror
gzclearerr
; large file functions
gzopen64
gzseek64
gztell64
gzoffset64
adler32_combine64
crc32_combine64
; checksum functions
adler32
crc32
adler32_combine
crc32_combine
; various hacks, don't look :)
deflateInit_
deflateInit2_
inflateInit_
inflateInit2_
inflateBackInit_
gzgetc_
zError
inflateSyncPoint
get_crc_table
inflateUndermine
inflateResetKeep
deflateResetKeep
gzopen_w

40
contrib/zlib/win32/zlib1.rc 100644
View File

@ -0,0 +1,40 @@
#include <winver.h>
#include "../zlib.h"
#ifdef GCC_WINDRES
VS_VERSION_INFO VERSIONINFO
#else
VS_VERSION_INFO VERSIONINFO MOVEABLE IMPURE LOADONCALL DISCARDABLE
#endif
FILEVERSION ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
PRODUCTVERSION ZLIB_VER_MAJOR,ZLIB_VER_MINOR,ZLIB_VER_REVISION,0
FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
#ifdef _DEBUG
FILEFLAGS 1
#else
FILEFLAGS 0
#endif
FILEOS VOS__WINDOWS32
FILETYPE VFT_DLL
FILESUBTYPE 0 // not used
BEGIN
BLOCK "StringFileInfo"
BEGIN
BLOCK "040904E4"
//language ID = U.S. English, char set = Windows, Multilingual
BEGIN
VALUE "FileDescription", "zlib data compression library\0"
VALUE "FileVersion", ZLIB_VERSION "\0"
VALUE "InternalName", "zlib1.dll\0"
VALUE "LegalCopyright", "(C) 1995-2013 Jean-loup Gailly & Mark Adler\0"
VALUE "OriginalFilename", "zlib1.dll\0"
VALUE "ProductName", "zlib\0"
VALUE "ProductVersion", ZLIB_VERSION "\0"
VALUE "Comments", "For more information visit http://www.zlib.net/\0"
END
END
BLOCK "VarFileInfo"
BEGIN
VALUE "Translation", 0x0409, 1252
END
END

113
contrib/zlib/zconf.h
View File

@ -1,5 +1,5 @@
/* zconf.h -- configuration of the zlib compression library /* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995-2010 Jean-loup Gailly. * Copyright (C) 1995-2013 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -7,6 +7,8 @@
#ifndef ZCONF_H #ifndef ZCONF_H
#define ZCONF_H #define ZCONF_H
/* #undef Z_PREFIX */
/* #undef Z_HAVE_UNISTD_H */
/* /*
* If you *really* need a unique prefix for all types and library functions, * If you *really* need a unique prefix for all types and library functions,
@ -15,11 +17,13 @@
* this permanently in zconf.h using "./configure --zprefix". * this permanently in zconf.h using "./configure --zprefix".
*/ */
#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */ #ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
# define Z_PREFIX_SET
/* all linked symbols */ /* all linked symbols */
# define _dist_code z__dist_code # define _dist_code z__dist_code
# define _length_code z__length_code # define _length_code z__length_code
# define _tr_align z__tr_align # define _tr_align z__tr_align
# define _tr_flush_bits z__tr_flush_bits
# define _tr_flush_block z__tr_flush_block # define _tr_flush_block z__tr_flush_block
# define _tr_init z__tr_init # define _tr_init z__tr_init
# define _tr_stored_block z__tr_stored_block # define _tr_stored_block z__tr_stored_block
@ -27,9 +31,11 @@
# define adler32 z_adler32 # define adler32 z_adler32
# define adler32_combine z_adler32_combine # define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64 # define adler32_combine64 z_adler32_combine64
# ifndef Z_SOLO
# define compress z_compress # define compress z_compress
# define compress2 z_compress2 # define compress2 z_compress2
# define compressBound z_compressBound # define compressBound z_compressBound
# endif
# define crc32 z_crc32 # define crc32 z_crc32
# define crc32_combine z_crc32_combine # define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64 # define crc32_combine64 z_crc32_combine64
@ -40,13 +46,16 @@
# define deflateInit2_ z_deflateInit2_ # define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_ # define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams # define deflateParams z_deflateParams
# define deflatePending z_deflatePending
# define deflatePrime z_deflatePrime # define deflatePrime z_deflatePrime
# define deflateReset z_deflateReset # define deflateReset z_deflateReset
# define deflateResetKeep z_deflateResetKeep
# define deflateSetDictionary z_deflateSetDictionary # define deflateSetDictionary z_deflateSetDictionary
# define deflateSetHeader z_deflateSetHeader # define deflateSetHeader z_deflateSetHeader
# define deflateTune z_deflateTune # define deflateTune z_deflateTune
# define deflate_copyright z_deflate_copyright # define deflate_copyright z_deflate_copyright
# define get_crc_table z_get_crc_table # define get_crc_table z_get_crc_table
# ifndef Z_SOLO
# define gz_error z_gz_error # define gz_error z_gz_error
# define gz_intmax z_gz_intmax # define gz_intmax z_gz_intmax
# define gz_strwinerror z_gz_strwinerror # define gz_strwinerror z_gz_strwinerror
@ -61,12 +70,17 @@
# define gzerror z_gzerror # define gzerror z_gzerror
# define gzflush z_gzflush # define gzflush z_gzflush
# define gzgetc z_gzgetc # define gzgetc z_gzgetc
# define gzgetc_ z_gzgetc_
# define gzgets z_gzgets # define gzgets z_gzgets
# define gzoffset z_gzoffset # define gzoffset z_gzoffset
# define gzoffset64 z_gzoffset64 # define gzoffset64 z_gzoffset64
# define gzopen z_gzopen # define gzopen z_gzopen
# define gzopen64 z_gzopen64 # define gzopen64 z_gzopen64
# ifdef _WIN32
# define gzopen_w z_gzopen_w
# endif
# define gzprintf z_gzprintf # define gzprintf z_gzprintf
# define gzvprintf z_gzvprintf
# define gzputc z_gzputc # define gzputc z_gzputc
# define gzputs z_gzputs # define gzputs z_gzputs
# define gzread z_gzread # define gzread z_gzread
@ -78,6 +92,7 @@
# define gztell64 z_gztell64 # define gztell64 z_gztell64
# define gzungetc z_gzungetc # define gzungetc z_gzungetc
# define gzwrite z_gzwrite # define gzwrite z_gzwrite
# endif
# define inflate z_inflate # define inflate z_inflate
# define inflateBack z_inflateBack # define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd # define inflateBackEnd z_inflateBackEnd
@ -92,16 +107,22 @@
# define inflateReset z_inflateReset # define inflateReset z_inflateReset
# define inflateReset2 z_inflateReset2 # define inflateReset2 z_inflateReset2
# define inflateSetDictionary z_inflateSetDictionary # define inflateSetDictionary z_inflateSetDictionary
# define inflateGetDictionary z_inflateGetDictionary
# define inflateSync z_inflateSync # define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint # define inflateSyncPoint z_inflateSyncPoint
# define inflateUndermine z_inflateUndermine # define inflateUndermine z_inflateUndermine
# define inflateResetKeep z_inflateResetKeep
# define inflate_copyright z_inflate_copyright # define inflate_copyright z_inflate_copyright
# define inflate_fast z_inflate_fast # define inflate_fast z_inflate_fast
# define inflate_table z_inflate_table # define inflate_table z_inflate_table
# ifndef Z_SOLO
# define uncompress z_uncompress # define uncompress z_uncompress
# endif
# define zError z_zError # define zError z_zError
# ifndef Z_SOLO
# define zcalloc z_zcalloc # define zcalloc z_zcalloc
# define zcfree z_zcfree # define zcfree z_zcfree
# endif
# define zlibCompileFlags z_zlibCompileFlags # define zlibCompileFlags z_zlibCompileFlags
# define zlibVersion z_zlibVersion # define zlibVersion z_zlibVersion
@ -111,7 +132,9 @@
# define alloc_func z_alloc_func # define alloc_func z_alloc_func
# define charf z_charf # define charf z_charf
# define free_func z_free_func # define free_func z_free_func
# ifndef Z_SOLO
# define gzFile z_gzFile # define gzFile z_gzFile
# endif
# define gz_header z_gz_header # define gz_header z_gz_header
# define gz_headerp z_gz_headerp # define gz_headerp z_gz_headerp
# define in_func z_in_func # define in_func z_in_func
@ -197,6 +220,12 @@
# endif # endif
#endif #endif
#if defined(ZLIB_CONST) && !defined(z_const)
# define z_const const
#else
# define z_const
#endif
/* Some Mac compilers merge all .h files incorrectly: */ /* Some Mac compilers merge all .h files incorrectly: */
#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__) #if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
# define NO_DUMMY_DECL # define NO_DUMMY_DECL
@ -243,6 +272,14 @@
# endif # endif
#endif #endif
#ifndef Z_ARG /* function prototypes for stdarg */
# if defined(STDC) || defined(Z_HAVE_STDARG_H)
# define Z_ARG(args) args
# else
# define Z_ARG(args) ()
# endif
#endif
/* The following definitions for FAR are needed only for MSDOS mixed /* The following definitions for FAR are needed only for MSDOS mixed
* model programming (small or medium model with some far allocations). * model programming (small or medium model with some far allocations).
* This was tested only with MSC; for other MSDOS compilers you may have * This was tested only with MSC; for other MSDOS compilers you may have
@ -356,12 +393,47 @@ typedef uLong FAR uLongf;
typedef Byte *voidp; typedef Byte *voidp;
#endif #endif
#if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
# include <limits.h>
# if (UINT_MAX == 0xffffffffUL)
# define Z_U4 unsigned
# elif (ULONG_MAX == 0xffffffffUL)
# define Z_U4 unsigned long
# elif (USHRT_MAX == 0xffffffffUL)
# define Z_U4 unsigned short
# endif
#endif
#ifdef Z_U4
typedef Z_U4 z_crc_t;
#else
typedef unsigned long z_crc_t;
#endif
#ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */ #ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */
# define Z_HAVE_UNISTD_H # define Z_HAVE_UNISTD_H
#endif #endif
#ifdef HAVE_STDARG_H /* may be set to #if 1 by ./configure */
# define Z_HAVE_STDARG_H
#endif
#ifdef STDC #ifdef STDC
# ifndef Z_SOLO
# include <sys/types.h> /* for off_t */ # include <sys/types.h> /* for off_t */
# endif
#endif
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
# ifndef Z_SOLO
# include <stdarg.h> /* for va_list */
# endif
#endif
#ifdef _WIN32
# ifndef Z_SOLO
# include <stddef.h> /* for wchar_t */
# endif
#endif #endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and /* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
@ -370,21 +442,38 @@ typedef uLong FAR uLongf;
* both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as * both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as
* equivalently requesting no 64-bit operations * equivalently requesting no 64-bit operations
*/ */
#if -_LARGEFILE64_SOURCE - -1 == 1 #if defined(_LARGEFILE64_SOURCE) && -_LARGEFILE64_SOURCE - -1 == 1
# undef _LARGEFILE64_SOURCE # undef _LARGEFILE64_SOURCE
#endif #endif
#if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE) #if defined(__WATCOMC__) && !defined(Z_HAVE_UNISTD_H)
# include <unistd.h> /* for SEEK_* and off_t */ # define Z_HAVE_UNISTD_H
#endif
#ifndef Z_SOLO
# if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE)
# include <unistd.h> /* for SEEK_*, off_t, and _LFS64_LARGEFILE */
# ifdef VMS # ifdef VMS
# include <unixio.h> /* for off_t */ # include <unixio.h> /* for off_t */
# endif # endif
# ifndef z_off_t # ifndef z_off_t
# define z_off_t off_t # define z_off_t off_t
# endif # endif
# endif
#endif #endif
#ifndef SEEK_SET #if defined(_LFS64_LARGEFILE) && _LFS64_LARGEFILE-0
# define Z_LFS64
#endif
#if defined(_LARGEFILE64_SOURCE) && defined(Z_LFS64)
# define Z_LARGE64
#endif
#if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS-0 == 64 && defined(Z_LFS64)
# define Z_WANT64
#endif
#if !defined(SEEK_SET) && !defined(Z_SOLO)
# define SEEK_SET 0 /* Seek from beginning of file. */ # define SEEK_SET 0 /* Seek from beginning of file. */
# define SEEK_CUR 1 /* Seek from current position. */ # define SEEK_CUR 1 /* Seek from current position. */
# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */ # define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
@ -394,18 +483,14 @@ typedef uLong FAR uLongf;
# define z_off_t long # define z_off_t long
#endif #endif
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 #if !defined(_WIN32) && defined(Z_LARGE64)
# define z_off64_t off64_t # define z_off64_t off64_t
#else #else
# if defined(_WIN32) && !defined(__GNUC__) && !defined(Z_SOLO)
# define z_off64_t __int64
# else
# define z_off64_t z_off_t # define z_off64_t z_off_t
#endif # endif
#if defined(__OS400__)
# define NO_vsnprintf
#endif
#if defined(__MVS__)
# define NO_vsnprintf
#endif #endif
/* MVS linker does not support external names larger than 8 bytes */ /* MVS linker does not support external names larger than 8 bytes */

331
contrib/zlib/zlib.h
View File

@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library /* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.5, April 19th, 2010 version 1.2.8, April 28th, 2013
Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages warranty. In no event will the authors be held liable for any damages
@ -24,8 +24,8 @@
The data format used by the zlib library is described by RFCs (Request for The data format used by the zlib library is described by RFCs (Request for
Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
*/ */
#ifndef ZLIB_H #ifndef ZLIB_H
@ -37,11 +37,11 @@
extern "C" { extern "C" {
#endif #endif
#define ZLIB_VERSION "1.2.5" #define ZLIB_VERSION "1.2.8"
#define ZLIB_VERNUM 0x1250 #define ZLIB_VERNUM 0x1280
#define ZLIB_VER_MAJOR 1 #define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2 #define ZLIB_VER_MINOR 2
#define ZLIB_VER_REVISION 5 #define ZLIB_VER_REVISION 8
#define ZLIB_VER_SUBREVISION 0 #define ZLIB_VER_SUBREVISION 0
/* /*
@ -83,15 +83,15 @@ typedef void (*free_func) OF((voidpf opaque, voidpf address));
struct internal_state; struct internal_state;
typedef struct z_stream_s { typedef struct z_stream_s {
Bytef *next_in; /* next input byte */ z_const Bytef *next_in; /* next input byte */
uInt avail_in; /* number of bytes available at next_in */ uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total nb of input bytes read so far */ uLong total_in; /* total number of input bytes read so far */
Bytef *next_out; /* next output byte should be put there */ Bytef *next_out; /* next output byte should be put there */
uInt avail_out; /* remaining free space at next_out */ uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total nb of bytes output so far */ uLong total_out; /* total number of bytes output so far */
char *msg; /* last error message, NULL if no error */ z_const char *msg; /* last error message, NULL if no error */
struct internal_state FAR *state; /* not visible by applications */ struct internal_state FAR *state; /* not visible by applications */
alloc_func zalloc; /* used to allocate the internal state */ alloc_func zalloc; /* used to allocate the internal state */
@ -327,8 +327,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
Z_FINISH can be used immediately after deflateInit if all the compression Z_FINISH can be used immediately after deflateInit if all the compression
is to be done in a single step. In this case, avail_out must be at least the is to be done in a single step. In this case, avail_out must be at least the
value returned by deflateBound (see below). If deflate does not return value returned by deflateBound (see below). Then deflate is guaranteed to
Z_STREAM_END, then it must be called again as described above. return Z_STREAM_END. If not enough output space is provided, deflate will
not return Z_STREAM_END, and it must be called again as described above.
deflate() sets strm->adler to the adler32 checksum of all input read deflate() sets strm->adler to the adler32 checksum of all input read
so far (that is, total_in bytes). so far (that is, total_in bytes).
@ -451,23 +452,29 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
error. However if all decompression is to be performed in a single step (a error. However if all decompression is to be performed in a single step (a
single call of inflate), the parameter flush should be set to Z_FINISH. In single call of inflate), the parameter flush should be set to Z_FINISH. In
this case all pending input is processed and all pending output is flushed; this case all pending input is processed and all pending output is flushed;
avail_out must be large enough to hold all the uncompressed data. (The size avail_out must be large enough to hold all of the uncompressed data for the
of the uncompressed data may have been saved by the compressor for this operation to complete. (The size of the uncompressed data may have been
purpose.) The next operation on this stream must be inflateEnd to deallocate saved by the compressor for this purpose.) The use of Z_FINISH is not
the decompression state. The use of Z_FINISH is never required, but can be required to perform an inflation in one step. However it may be used to
used to inform inflate that a faster approach may be used for the single inform inflate that a faster approach can be used for the single inflate()
inflate() call. call. Z_FINISH also informs inflate to not maintain a sliding window if the
stream completes, which reduces inflate's memory footprint. If the stream
does not complete, either because not all of the stream is provided or not
enough output space is provided, then a sliding window will be allocated and
inflate() can be called again to continue the operation as if Z_NO_FLUSH had
been used.
In this implementation, inflate() always flushes as much output as In this implementation, inflate() always flushes as much output as
possible to the output buffer, and always uses the faster approach on the possible to the output buffer, and always uses the faster approach on the
first call. So the only effect of the flush parameter in this implementation first call. So the effects of the flush parameter in this implementation are
is on the return value of inflate(), as noted below, or when it returns early on the return value of inflate() as noted below, when inflate() returns early
because Z_BLOCK or Z_TREES is used. when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of
memory for a sliding window when Z_FINISH is used.
If a preset dictionary is needed after this call (see inflateSetDictionary If a preset dictionary is needed after this call (see inflateSetDictionary
below), inflate sets strm->adler to the adler32 checksum of the dictionary below), inflate sets strm->adler to the Adler-32 checksum of the dictionary
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the adler32 checksum of all output produced so far (that is, strm->adler to the Adler-32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
below. At the end of the stream, inflate() checks that its computed adler32 below. At the end of the stream, inflate() checks that its computed adler32
checksum is equal to that saved by the compressor and returns Z_STREAM_END checksum is equal to that saved by the compressor and returns Z_STREAM_END
@ -478,7 +485,9 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
initializing with inflateInit2(). Any information contained in the gzip initializing with inflateInit2(). Any information contained in the gzip
header is not retained, so applications that need that information should header is not retained, so applications that need that information should
instead use raw inflate, see inflateInit2() below, or inflateBack() and instead use raw inflate, see inflateInit2() below, or inflateBack() and
perform their own processing of the gzip header and trailer. perform their own processing of the gzip header and trailer. When processing
gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
producted so far. The CRC-32 is checked against the gzip trailer.
inflate() returns Z_OK if some progress has been made (more input processed inflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_END if the end of the compressed data has or more output produced), Z_STREAM_END if the end of the compressed data has
@ -580,10 +589,15 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
uInt dictLength)); uInt dictLength));
/* /*
Initializes the compression dictionary from the given byte sequence Initializes the compression dictionary from the given byte sequence
without producing any compressed output. This function must be called without producing any compressed output. When using the zlib format, this
immediately after deflateInit, deflateInit2 or deflateReset, before any call function must be called immediately after deflateInit, deflateInit2 or
of deflate. The compressor and decompressor must use exactly the same deflateReset, and before any call of deflate. When doing raw deflate, this
dictionary (see inflateSetDictionary). function must be called either before any call of deflate, or immediately
after the completion of a deflate block, i.e. after all input has been
consumed and all output has been delivered when using any of the flush
options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The
compressor and decompressor must use exactly the same dictionary (see
inflateSetDictionary).
The dictionary should consist of strings (byte sequences) that are likely The dictionary should consist of strings (byte sequences) that are likely
to be encountered later in the data to be compressed, with the most commonly to be encountered later in the data to be compressed, with the most commonly
@ -610,8 +624,8 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent (for example if deflate has already been called for this stream inconsistent (for example if deflate has already been called for this stream
or if the compression method is bsort). deflateSetDictionary does not or if not at a block boundary for raw deflate). deflateSetDictionary does
perform any compression: this will be done by deflate(). not perform any compression: this will be done by deflate().
*/ */
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
@ -688,9 +702,29 @@ ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
deflation of sourceLen bytes. It must be called after deflateInit() or deflation of sourceLen bytes. It must be called after deflateInit() or
deflateInit2(), and after deflateSetHeader(), if used. This would be used deflateInit2(), and after deflateSetHeader(), if used. This would be used
to allocate an output buffer for deflation in a single pass, and so would be to allocate an output buffer for deflation in a single pass, and so would be
called before deflate(). called before deflate(). If that first deflate() call is provided the
sourceLen input bytes, an output buffer allocated to the size returned by
deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed
to return Z_STREAM_END. Note that it is possible for the compressed size to
be larger than the value returned by deflateBound() if flush options other
than Z_FINISH or Z_NO_FLUSH are used.
*/ */
ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm,
unsigned *pending,
int *bits));
/*
deflatePending() returns the number of bytes and bits of output that have
been generated, but not yet provided in the available output. The bytes not
provided would be due to the available output space having being consumed.
The number of bits of output not provided are between 0 and 7, where they
await more bits to join them in order to fill out a full byte. If pending
or bits are Z_NULL, then those values are not set.
deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
int bits, int bits,
int value)); int value));
@ -703,8 +737,9 @@ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
than or equal to 16, and that many of the least significant bits of value than or equal to 16, and that many of the least significant bits of value
will be inserted in the output. will be inserted in the output.
deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough
stream state was inconsistent. room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the
source stream state was inconsistent.
*/ */
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
@ -790,10 +825,11 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate. can be determined from the adler32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called deflateSetDictionary). For raw inflate, this function can be called at any
immediately after inflateInit2() or inflateReset() and before any call of time to set the dictionary. If the provided dictionary is smaller than the
inflate() to set the dictionary. The application must insure that the window and there is already data in the window, then the provided dictionary
dictionary that was used for compression is provided. will amend what's there. The application must insure that the dictionary
that was used for compression is provided.
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
@ -803,19 +839,38 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
inflate(). inflate().
*/ */
ZEXTERN int ZEXPORT inflateGetDictionary OF((z_streamp strm,
Bytef *dictionary,
uInt *dictLength));
/*
Returns the sliding dictionary being maintained by inflate. dictLength is
set to the number of bytes in the dictionary, and that many bytes are copied
to dictionary. dictionary must have enough space, where 32768 bytes is
always enough. If inflateGetDictionary() is called with dictionary equal to
Z_NULL, then only the dictionary length is returned, and nothing is copied.
Similary, if dictLength is Z_NULL, then it is not set.
inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
stream state is inconsistent.
*/
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
/* /*
Skips invalid compressed data until a full flush point (see above the Skips invalid compressed data until a possible full flush point (see above
description of deflate with Z_FULL_FLUSH) can be found, or until all for the description of deflate with Z_FULL_FLUSH) can be found, or until all
available input is skipped. No output is provided. available input is skipped. No output is provided.
inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR inflateSync searches for a 00 00 FF FF pattern in the compressed data.
if no more input was provided, Z_DATA_ERROR if no flush point has been All full flush points have this pattern, but not all occurrences of this
found, or Z_STREAM_ERROR if the stream structure was inconsistent. In the pattern are full flush points.
success case, the application may save the current current value of total_in
which indicates where valid compressed data was found. In the error case, inflateSync returns Z_OK if a possible full flush point has been found,
the application may repeatedly call inflateSync, providing more input each Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point
time, until success or end of the input data. has been found, or Z_STREAM_ERROR if the stream structure was inconsistent.
In the success case, the application may save the current current value of
total_in which indicates where valid compressed data was found. In the
error case, the application may repeatedly call inflateSync, providing more
input each time, until success or end of the input data.
*/ */
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
@ -962,12 +1017,13 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
See inflateBack() for the usage of these routines. See inflateBack() for the usage of these routines.
inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
the paramaters are invalid, Z_MEM_ERROR if the internal state could not be the parameters are invalid, Z_MEM_ERROR if the internal state could not be
allocated, or Z_VERSION_ERROR if the version of the library does not match allocated, or Z_VERSION_ERROR if the version of the library does not match
the version of the header file. the version of the header file.
*/ */
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *)); typedef unsigned (*in_func) OF((void FAR *,
z_const unsigned char FAR * FAR *));
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
@ -975,11 +1031,12 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
out_func out, void FAR *out_desc)); out_func out, void FAR *out_desc));
/* /*
inflateBack() does a raw inflate with a single call using a call-back inflateBack() does a raw inflate with a single call using a call-back
interface for input and output. This is more efficient than inflate() for interface for input and output. This is potentially more efficient than
file i/o applications in that it avoids copying between the output and the inflate() for file i/o applications, in that it avoids copying between the
sliding window by simply making the window itself the output buffer. This output and the sliding window by simply making the window itself the output
function trusts the application to not change the output buffer passed by buffer. inflate() can be faster on modern CPUs when used with large
the output function, at least until inflateBack() returns. buffers. inflateBack() trusts the application to not change the output
buffer passed by the output function, at least until inflateBack() returns.
inflateBackInit() must be called first to allocate the internal state inflateBackInit() must be called first to allocate the internal state
and to initialize the state with the user-provided window buffer. and to initialize the state with the user-provided window buffer.
@ -1088,6 +1145,7 @@ ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
27-31: 0 (reserved) 27-31: 0 (reserved)
*/ */
#ifndef Z_SOLO
/* utility functions */ /* utility functions */
@ -1149,10 +1207,11 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In
the case where there is not enough room, uncompress() will fill the output
buffer with the uncompressed data up to that point.
*/ */
/* gzip file access functions */ /* gzip file access functions */
/* /*
@ -1162,7 +1221,7 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
wrapper, documented in RFC 1952, wrapped around a deflate stream. wrapper, documented in RFC 1952, wrapped around a deflate stream.
*/ */
typedef voidp gzFile; /* opaque gzip file descriptor */ typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */
/* /*
ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
@ -1172,13 +1231,28 @@ ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only
compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F'
for fixed code compression as in "wb9F". (See the description of for fixed code compression as in "wb9F". (See the description of
deflateInit2 for more information about the strategy parameter.) Also "a" deflateInit2 for more information about the strategy parameter.) 'T' will
can be used instead of "w" to request that the gzip stream that will be request transparent writing or appending with no compression and not using
written be appended to the file. "+" will result in an error, since reading the gzip format.
and writing to the same gzip file is not supported.
"a" can be used instead of "w" to request that the gzip stream that will
be written be appended to the file. "+" will result in an error, since
reading and writing to the same gzip file is not supported. The addition of
"x" when writing will create the file exclusively, which fails if the file
already exists. On systems that support it, the addition of "e" when
reading or writing will set the flag to close the file on an execve() call.
These functions, as well as gzip, will read and decode a sequence of gzip
streams in a file. The append function of gzopen() can be used to create
such a file. (Also see gzflush() for another way to do this.) When
appending, gzopen does not test whether the file begins with a gzip stream,
nor does it look for the end of the gzip streams to begin appending. gzopen
will simply append a gzip stream to the existing file.
gzopen can be used to read a file which is not in gzip format; in this gzopen can be used to read a file which is not in gzip format; in this
case gzread will directly read from the file without decompression. case gzread will directly read from the file without decompression. When
reading, this will be detected automatically by looking for the magic two-
byte gzip header.
gzopen returns NULL if the file could not be opened, if there was gzopen returns NULL if the file could not be opened, if there was
insufficient memory to allocate the gzFile state, or if an invalid mode was insufficient memory to allocate the gzFile state, or if an invalid mode was
@ -1197,7 +1271,11 @@ ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor
fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd,
mode);. The duplicated descriptor should be saved to avoid a leak, since mode);. The duplicated descriptor should be saved to avoid a leak, since
gzdopen does not close fd if it fails. gzdopen does not close fd if it fails. If you are using fileno() to get the
file descriptor from a FILE *, then you will have to use dup() to avoid
double-close()ing the file descriptor. Both gzclose() and fclose() will
close the associated file descriptor, so they need to have different file
descriptors.
gzdopen returns NULL if there was insufficient memory to allocate the gzdopen returns NULL if there was insufficient memory to allocate the
gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not
@ -1235,14 +1313,26 @@ ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
/* /*
Reads the given number of uncompressed bytes from the compressed file. If Reads the given number of uncompressed bytes from the compressed file. If
the input file was not in gzip format, gzread copies the given number of the input file is not in gzip format, gzread copies the given number of
bytes into the buffer. bytes into the buffer directly from the file.
After reaching the end of a gzip stream in the input, gzread will continue After reaching the end of a gzip stream in the input, gzread will continue
to read, looking for another gzip stream, or failing that, reading the rest to read, looking for another gzip stream. Any number of gzip streams may be
of the input file directly without decompression. The entire input file concatenated in the input file, and will all be decompressed by gzread().
will be read if gzread is called until it returns less than the requested If something other than a gzip stream is encountered after a gzip stream,
len. that remaining trailing garbage is ignored (and no error is returned).
gzread can be used to read a gzip file that is being concurrently written.
Upon reaching the end of the input, gzread will return with the available
data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then
gzclearerr can be used to clear the end of file indicator in order to permit
gzread to be tried again. Z_OK indicates that a gzip stream was completed
on the last gzread. Z_BUF_ERROR indicates that the input file ended in the
middle of a gzip stream. Note that gzread does not return -1 in the event
of an incomplete gzip stream. This error is deferred until gzclose(), which
will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip
stream. Alternatively, gzerror can be used before gzclose to detect this
case.
gzread returns the number of uncompressed bytes actually read, less than gzread returns the number of uncompressed bytes actually read, less than
len for end of file, or -1 for error. len for end of file, or -1 for error.
@ -1256,7 +1346,7 @@ ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
error. error.
*/ */
ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...)); ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
/* /*
Converts, formats, and writes the arguments to the compressed file under Converts, formats, and writes the arguments to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of control of the format string, as in fprintf. gzprintf returns the number of
@ -1301,7 +1391,10 @@ ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
/* /*
Reads one byte from the compressed file. gzgetc returns this byte or -1 Reads one byte from the compressed file. gzgetc returns this byte or -1
in case of end of file or error. in case of end of file or error. This is implemented as a macro for speed.
As such, it does not do all of the checking the other functions do. I.e.
it does not check to see if file is NULL, nor whether the structure file
points to has been clobbered or not.
*/ */
ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
@ -1397,9 +1490,7 @@ ZEXTERN int ZEXPORT gzeof OF((gzFile file));
ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/* /*
Returns true (1) if file is being copied directly while reading, or false Returns true (1) if file is being copied directly while reading, or false
(0) if file is a gzip stream being decompressed. This state can change from (0) if file is a gzip stream being decompressed.
false to true while reading the input file if the end of a gzip stream is
reached, but is followed by data that is not another gzip stream.
If the input file is empty, gzdirect() will return true, since the input If the input file is empty, gzdirect() will return true, since the input
does not contain a gzip stream. does not contain a gzip stream.
@ -1408,6 +1499,13 @@ ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
cause buffers to be allocated to allow reading the file to determine if it cause buffers to be allocated to allow reading the file to determine if it
is a gzip file. Therefore if gzbuffer() is used, it should be called before is a gzip file. Therefore if gzbuffer() is used, it should be called before
gzdirect(). gzdirect().
When writing, gzdirect() returns true (1) if transparent writing was
requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note:
gzdirect() is not needed when writing. Transparent writing must be
explicitly requested, so the application already knows the answer. When
linking statically, using gzdirect() will include all of the zlib code for
gzip file reading and decompression, which may not be desired.)
*/ */
ZEXTERN int ZEXPORT gzclose OF((gzFile file)); ZEXTERN int ZEXPORT gzclose OF((gzFile file));
@ -1419,7 +1517,8 @@ ZEXTERN int ZEXPORT gzclose OF((gzFile file));
must not be called more than once on the same allocation. must not be called more than once on the same allocation.
gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a
file operation error, or Z_OK on success. file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the
last read ended in the middle of a gzip stream, or Z_OK on success.
*/ */
ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); ZEXTERN int ZEXPORT gzclose_r OF((gzFile file));
@ -1457,6 +1556,7 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
file that is being written concurrently. file that is being written concurrently.
*/ */
#endif /* !Z_SOLO */
/* checksum functions */ /* checksum functions */
@ -1492,16 +1592,17 @@ ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note
that the z_off_t type (like off_t) is a signed integer. If len2 is
negative, the result has no meaning or utility.
*/ */
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
/* /*
Update a running CRC-32 with the bytes buf[0..len-1] and return the Update a running CRC-32 with the bytes buf[0..len-1] and return the
updated CRC-32. If buf is Z_NULL, this function returns the required updated CRC-32. If buf is Z_NULL, this function returns the required
initial value for the for the crc. Pre- and post-conditioning (one's initial value for the crc. Pre- and post-conditioning (one's complement) is
complement) is performed within this function so it shouldn't be done by the performed within this function so it shouldn't be done by the application.
application.
Usage example: Usage example:
@ -1544,17 +1645,42 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
const char *version, const char *version,
int stream_size)); int stream_size));
#define deflateInit(strm, level) \ #define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream)) deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit(strm) \ #define inflateInit(strm) \
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream)) inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ #define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
(strategy), ZLIB_VERSION, sizeof(z_stream)) (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit2(strm, windowBits) \ #define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream)) inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
(int)sizeof(z_stream))
#define inflateBackInit(strm, windowBits, window) \ #define inflateBackInit(strm, windowBits, window) \
inflateBackInit_((strm), (windowBits), (window), \ inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, sizeof(z_stream)) ZLIB_VERSION, (int)sizeof(z_stream))
#ifndef Z_SOLO
/* gzgetc() macro and its supporting function and exposed data structure. Note
* that the real internal state is much larger than the exposed structure.
* This abbreviated structure exposes just enough for the gzgetc() macro. The
* user should not mess with these exposed elements, since their names or
* behavior could change in the future, perhaps even capriciously. They can
* only be used by the gzgetc() macro. You have been warned.
*/
struct gzFile_s {
unsigned have;
unsigned char *next;
z_off64_t pos;
};
ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
#ifdef Z_PREFIX_SET
# undef z_gzgetc
# define z_gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
#else
# define gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
#endif
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or /* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
* change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if
@ -1562,7 +1688,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
* functions are changed to 64 bits) -- in case these are set on systems * functions are changed to 64 bits) -- in case these are set on systems
* without large file support, _LFS64_LARGEFILE must also be true * without large file support, _LFS64_LARGEFILE must also be true
*/ */
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 #ifdef Z_LARGE64
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
@ -1571,14 +1697,23 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t));
#endif #endif
#if !defined(ZLIB_INTERNAL) && _FILE_OFFSET_BITS-0 == 64 && _LFS64_LARGEFILE-0 #if !defined(ZLIB_INTERNAL) && defined(Z_WANT64)
# ifdef Z_PREFIX_SET
# define z_gzopen z_gzopen64
# define z_gzseek z_gzseek64
# define z_gztell z_gztell64
# define z_gzoffset z_gzoffset64
# define z_adler32_combine z_adler32_combine64
# define z_crc32_combine z_crc32_combine64
# else
# define gzopen gzopen64 # define gzopen gzopen64
# define gzseek gzseek64 # define gzseek gzseek64
# define gztell gztell64 # define gztell gztell64
# define gzoffset gzoffset64 # define gzoffset gzoffset64
# define adler32_combine adler32_combine64 # define adler32_combine adler32_combine64
# define crc32_combine crc32_combine64 # define crc32_combine crc32_combine64
# ifdef _LARGEFILE64_SOURCE # endif
# ifndef Z_LARGE64
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int));
ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));
@ -1595,6 +1730,13 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
#endif #endif
#else /* Z_SOLO */
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
#endif /* !Z_SOLO */
/* hack for buggy compilers */ /* hack for buggy compilers */
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) #if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;}; struct internal_state {int dummy;};
@ -1603,8 +1745,21 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
/* undocumented functions */ /* undocumented functions */
ZEXTERN const char * ZEXPORT zError OF((int)); ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void)); ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
#if defined(_WIN32) && !defined(Z_SOLO)
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path,
const char *mode));
#endif
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
# ifndef Z_SOLO
ZEXTERN int ZEXPORTVA gzvprintf Z_ARG((gzFile file,
const char *format,
va_list va));
# endif
#endif
#ifdef __cplusplus #ifdef __cplusplus
} }

12
contrib/zlib/zutil.c
View File

@ -1,17 +1,20 @@
/* zutil.c -- target dependent utility functions for the compression library /* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995-2005, 2010 Jean-loup Gailly. * Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
/* @(#) $Id$ */ /* @(#) $Id$ */
#include "zutil.h" #include "zutil.h"
#ifndef Z_SOLO
# include "gzguts.h"
#endif
#ifndef NO_DUMMY_DECL #ifndef NO_DUMMY_DECL
struct internal_state {int dummy;}; /* for buggy compilers */ struct internal_state {int dummy;}; /* for buggy compilers */
#endif #endif
const char * const z_errmsg[10] = { z_const char * const z_errmsg[10] = {
"need dictionary", /* Z_NEED_DICT 2 */ "need dictionary", /* Z_NEED_DICT 2 */
"stream end", /* Z_STREAM_END 1 */ "stream end", /* Z_STREAM_END 1 */
"", /* Z_OK 0 */ "", /* Z_OK 0 */
@ -85,7 +88,7 @@ uLong ZEXPORT zlibCompileFlags()
#ifdef FASTEST #ifdef FASTEST
flags += 1L << 21; flags += 1L << 21;
#endif #endif
#ifdef STDC #if defined(STDC) || defined(Z_HAVE_STDARG_H)
# ifdef NO_vsnprintf # ifdef NO_vsnprintf
flags += 1L << 25; flags += 1L << 25;
# ifdef HAS_vsprintf_void # ifdef HAS_vsprintf_void
@ -181,6 +184,7 @@ void ZLIB_INTERNAL zmemzero(dest, len)
} }
#endif #endif
#ifndef Z_SOLO
#ifdef SYS16BIT #ifdef SYS16BIT
@ -316,3 +320,5 @@ void ZLIB_INTERNAL zcfree (opaque, ptr)
} }
#endif /* MY_ZCALLOC */ #endif /* MY_ZCALLOC */
#endif /* !Z_SOLO */

73
contrib/zlib/zutil.h
View File

@ -1,5 +1,5 @@
/* zutil.h -- internal interface and configuration of the compression library /* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2010 Jean-loup Gailly. * Copyright (C) 1995-2013 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -13,7 +13,7 @@
#ifndef ZUTIL_H #ifndef ZUTIL_H
#define ZUTIL_H #define ZUTIL_H
#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ) #ifdef HAVE_HIDDEN
# define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else #else
# define ZLIB_INTERNAL # define ZLIB_INTERNAL
@ -21,7 +21,7 @@
#include "zlib.h" #include "zlib.h"
#ifdef STDC #if defined(STDC) && !defined(Z_SOLO)
# if !(defined(_WIN32_WCE) && defined(_MSC_VER)) # if !(defined(_WIN32_WCE) && defined(_MSC_VER))
# include <stddef.h> # include <stddef.h>
# endif # endif
@ -29,6 +29,10 @@
# include <stdlib.h> # include <stdlib.h>
#endif #endif
#ifdef Z_SOLO
typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
#endif
#ifndef local #ifndef local
# define local static # define local static
#endif #endif
@ -40,13 +44,13 @@ typedef unsigned short ush;
typedef ush FAR ushf; typedef ush FAR ushf;
typedef unsigned long ulg; typedef unsigned long ulg;
extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */ /* (size given to avoid silly warnings with Visual C++) */
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
#define ERR_RETURN(strm,err) \ #define ERR_RETURN(strm,err) \
return (strm->msg = (char*)ERR_MSG(err), (err)) return (strm->msg = ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */ /* To be used only when the state is known to be valid */
/* common constants */ /* common constants */
@ -78,6 +82,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
# define OS_CODE 0x00 # define OS_CODE 0x00
# ifndef Z_SOLO
# if defined(__TURBOC__) || defined(__BORLANDC__) # if defined(__TURBOC__) || defined(__BORLANDC__)
# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
/* Allow compilation with ANSI keywords only enabled */ /* Allow compilation with ANSI keywords only enabled */
@ -89,6 +94,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# else /* MSC or DJGPP */ # else /* MSC or DJGPP */
# include <malloc.h> # include <malloc.h>
# endif # endif
# endif
#endif #endif
#ifdef AMIGA #ifdef AMIGA
@ -107,13 +113,14 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
#ifdef OS2 #ifdef OS2
# define OS_CODE 0x06 # define OS_CODE 0x06
# ifdef M_I86 # if defined(M_I86) && !defined(Z_SOLO)
# include <malloc.h> # include <malloc.h>
# endif # endif
#endif #endif
#if defined(MACOS) || defined(TARGET_OS_MAC) #if defined(MACOS) || defined(TARGET_OS_MAC)
# define OS_CODE 0x07 # define OS_CODE 0x07
# ifndef Z_SOLO
# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
# include <unix.h> /* for fdopen */ # include <unix.h> /* for fdopen */
# else # else
@ -121,6 +128,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define fdopen(fd,mode) NULL /* No fdopen() */ # define fdopen(fd,mode) NULL /* No fdopen() */
# endif # endif
# endif # endif
# endif
#endif #endif
#ifdef TOPS20 #ifdef TOPS20
@ -153,14 +161,15 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# endif # endif
#endif #endif
#if defined(__BORLANDC__) #if defined(__BORLANDC__) && !defined(MSDOS)
#pragma warn -8004 #pragma warn -8004
#pragma warn -8008 #pragma warn -8008
#pragma warn -8066 #pragma warn -8066
#endif #endif
/* provide prototypes for these when building zlib without LFS */ /* provide prototypes for these when building zlib without LFS */
#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 #if !defined(_WIN32) && \
(!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
#endif #endif
@ -177,42 +186,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
/* functions */ /* functions */
#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) #if defined(pyr) || defined(Z_SOLO)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#if defined(__CYGWIN__)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#ifndef HAVE_VSNPRINTF
# ifdef MSDOS
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
but for now we just assume it doesn't. */
# define NO_vsnprintf
# endif
# ifdef __TURBOC__
# define NO_vsnprintf
# endif
# ifdef WIN32
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
# if !defined(vsnprintf) && !defined(NO_vsnprintf)
# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
# define vsnprintf _vsnprintf
# endif
# endif
# endif
# ifdef __SASC
# define NO_vsnprintf
# endif
#endif
#ifdef VMS
# define NO_vsnprintf
#endif
#if defined(pyr)
# define NO_MEMCPY # define NO_MEMCPY
#endif #endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
@ -261,14 +235,19 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define Tracecv(c,x) # define Tracecv(c,x)
#endif #endif
#ifndef Z_SOLO
voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
unsigned size)); unsigned size));
void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
#endif
#define ZALLOC(strm, items, size) \ #define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size)) (*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
/* Reverse the bytes in a 32-bit value */
#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
#endif /* ZUTIL_H */ #endif /* ZUTIL_H */