603 lines
20 KiB
C++
603 lines
20 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2024, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file ZipArchiveIOSystem.cpp
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* @brief Zip File I/O implementation for #Importer
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*/
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#include <assimp/BaseImporter.h>
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#include <assimp/ZipArchiveIOSystem.h>
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#include <assimp/ai_assert.h>
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#include <map>
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#include <memory>
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#ifdef ASSIMP_USE_HUNTER
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# include <minizip/unzip.h>
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#else
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# include <unzip.h>
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#endif
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namespace Assimp {
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// ----------------------------------------------------------------
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// A read-only file inside a ZIP
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class ZipFile final : public IOStream {
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friend class ZipFileInfo;
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explicit ZipFile(std::string &filename, size_t size);
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public:
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std::string m_Filename;
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~ZipFile() override = default;
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// IOStream interface
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size_t Read(void *pvBuffer, size_t pSize, size_t pCount) override;
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size_t Write(const void * /*pvBuffer*/, size_t /*pSize*/, size_t /*pCount*/) override { return 0; }
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size_t FileSize() const override;
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aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override;
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size_t Tell() const override;
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void Flush() override {}
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private:
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size_t m_Size = 0;
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size_t m_SeekPtr = 0;
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std::unique_ptr<uint8_t[]> m_Buffer;
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};
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// ----------------------------------------------------------------
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// Wraps an existing Assimp::IOSystem for unzip
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class IOSystem2Unzip {
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public:
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IOSystem2Unzip() = default;
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~IOSystem2Unzip() = default;
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static voidpf open(voidpf opaque, const char *filename, int mode);
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static voidpf opendisk(voidpf opaque, voidpf stream, uint32_t number_disk, int mode);
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static uLong read(voidpf opaque, voidpf stream, void *buf, uLong size);
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static uLong write(voidpf opaque, voidpf stream, const void *buf, uLong size);
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static long tell(voidpf opaque, voidpf stream);
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static long seek(voidpf opaque, voidpf stream, uLong offset, int origin);
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static int close(voidpf opaque, voidpf stream);
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static int testerror(voidpf opaque, voidpf stream);
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static zlib_filefunc_def get(IOSystem *pIOHandler);
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};
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// ----------------------------------------------------------------
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voidpf IOSystem2Unzip::open(voidpf opaque, const char *filename, int mode) {
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IOSystem *io_system = reinterpret_cast<IOSystem *>(opaque);
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const char *mode_fopen = nullptr;
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ) {
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mode_fopen = "rb";
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} else {
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if (mode & ZLIB_FILEFUNC_MODE_EXISTING) {
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mode_fopen = "r+b";
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} else {
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if (mode & ZLIB_FILEFUNC_MODE_CREATE) {
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mode_fopen = "wb";
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}
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}
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}
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return (voidpf)io_system->Open(filename, mode_fopen);
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}
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// ----------------------------------------------------------------
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voidpf IOSystem2Unzip::opendisk(voidpf opaque, voidpf stream, uint32_t number_disk, int mode) {
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ZipFile *io_stream = (ZipFile *)stream;
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voidpf ret = nullptr;
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int i;
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char *disk_filename = (char*)malloc(io_stream->m_Filename.length() + 1);
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strncpy(disk_filename, io_stream->m_Filename.c_str(), io_stream->m_Filename.length() + 1);
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for (i = (int)io_stream->m_Filename.length() - 1; i >= 0; i -= 1)
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{
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if (disk_filename[i] != '.')
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continue;
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snprintf(&disk_filename[i], io_stream->m_Filename.length() - size_t(i), ".z%02u", number_disk + 1);
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break;
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}
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if (i >= 0)
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ret = open(opaque, disk_filename, mode);
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free(disk_filename);
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return ret;
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}
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// ----------------------------------------------------------------
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uLong IOSystem2Unzip::read(voidpf /*opaque*/, voidpf stream, void *buf, uLong size) {
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IOStream *io_stream = (IOStream *)stream;
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return static_cast<uLong>(io_stream->Read(buf, 1, size));
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}
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// ----------------------------------------------------------------
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uLong IOSystem2Unzip::write(voidpf /*opaque*/, voidpf stream, const void *buf, uLong size) {
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IOStream *io_stream = (IOStream *)stream;
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return static_cast<uLong>(io_stream->Write(buf, 1, size));
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}
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// ----------------------------------------------------------------
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long IOSystem2Unzip::tell(voidpf /*opaque*/, voidpf stream) {
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IOStream *io_stream = (IOStream *)stream;
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return static_cast<long>(io_stream->Tell());
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}
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// ----------------------------------------------------------------
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long IOSystem2Unzip::seek(voidpf /*opaque*/, voidpf stream, uLong offset, int origin) {
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IOStream *io_stream = (IOStream *)stream;
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aiOrigin assimp_origin;
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switch (origin) {
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default:
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case ZLIB_FILEFUNC_SEEK_CUR:
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assimp_origin = aiOrigin_CUR;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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assimp_origin = aiOrigin_END;
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break;
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case ZLIB_FILEFUNC_SEEK_SET:
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assimp_origin = aiOrigin_SET;
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break;
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}
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return (io_stream->Seek(offset, assimp_origin) == aiReturn_SUCCESS ? 0 : -1);
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}
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// ----------------------------------------------------------------
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int IOSystem2Unzip::close(voidpf opaque, voidpf stream) {
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IOSystem *io_system = (IOSystem *)opaque;
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IOStream *io_stream = (IOStream *)stream;
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io_system->Close(io_stream);
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return 0;
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}
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// ----------------------------------------------------------------
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int IOSystem2Unzip::testerror(voidpf /*opaque*/, voidpf /*stream*/) {
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return 0;
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}
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// ----------------------------------------------------------------
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zlib_filefunc_def IOSystem2Unzip::get(IOSystem *pIOHandler) {
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zlib_filefunc_def mapping;
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mapping.zopen_file = (open_file_func)open;
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#ifdef _UNZ_H
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mapping.zopendisk_file = (opendisk_file_func)opendisk;
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#endif
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mapping.zread_file = (read_file_func)read;
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mapping.zwrite_file = (write_file_func)write;
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mapping.ztell_file = (tell_file_func)tell;
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mapping.zseek_file = (seek_file_func)seek;
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mapping.zclose_file = (close_file_func)close;
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mapping.zerror_file = testerror;
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mapping.opaque = reinterpret_cast<voidpf>(pIOHandler);
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return mapping;
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}
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// ----------------------------------------------------------------
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// Info about a read-only file inside a ZIP
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class ZipFileInfo final {
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public:
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explicit ZipFileInfo(unzFile zip_handle, size_t size);
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~ZipFileInfo() = default;
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// Allocate and Extract data from the ZIP
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ZipFile *Extract(std::string &filename, unzFile zip_handle) const;
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private:
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size_t m_Size = 0;
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unz_file_pos_s m_ZipFilePos;
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};
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// ----------------------------------------------------------------
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ZipFileInfo::ZipFileInfo(unzFile zip_handle, size_t size) :
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m_Size(size) {
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ai_assert(m_Size != 0);
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// Workaround for MSVC 2013 - C2797
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m_ZipFilePos.num_of_file = 0;
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m_ZipFilePos.pos_in_zip_directory = 0;
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unzGetFilePos(zip_handle, &(m_ZipFilePos));
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}
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// ----------------------------------------------------------------
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ZipFile *ZipFileInfo::Extract(std::string &filename, unzFile zip_handle) const {
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// Find in the ZIP. This cannot fail
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unz_file_pos_s *filepos = const_cast<unz_file_pos_s *>(&(m_ZipFilePos));
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if (unzGoToFilePos(zip_handle, filepos) != UNZ_OK)
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return nullptr;
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if (unzOpenCurrentFile(zip_handle) != UNZ_OK)
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return nullptr;
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ZipFile *zip_file = new ZipFile(filename, m_Size);
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// Unzip has a limit of UINT16_MAX bytes buffer
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uint16_t unzipBufferSize = zip_file->m_Size <= UINT16_MAX ? static_cast<uint16_t>(zip_file->m_Size) : UINT16_MAX;
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std::unique_ptr<uint8_t[]> unzipBuffer = std::unique_ptr<uint8_t[]>(new uint8_t[unzipBufferSize]);
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size_t readCount = 0;
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while (readCount < zip_file->m_Size)
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{
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size_t bufferSize = zip_file->m_Size - readCount;
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if (bufferSize > UINT16_MAX) {
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bufferSize = UINT16_MAX;
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}
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int ret = unzReadCurrentFile(zip_handle, unzipBuffer.get(), static_cast<unsigned int>(bufferSize));
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if (ret != static_cast<int>(bufferSize))
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{
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// Failed, release the memory
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delete zip_file;
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zip_file = nullptr;
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break;
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}
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std::memcpy(zip_file->m_Buffer.get() + readCount, unzipBuffer.get(), ret);
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readCount += ret;
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}
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ai_assert(unzCloseCurrentFile(zip_handle) == UNZ_OK);
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return zip_file;
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}
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// ----------------------------------------------------------------
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ZipFile::ZipFile(std::string &filename, size_t size) :
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m_Filename(filename), m_Size(size) {
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ai_assert(m_Size != 0);
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m_Buffer = std::unique_ptr<uint8_t[]>(new uint8_t[m_Size]);
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}
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// ----------------------------------------------------------------
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size_t ZipFile::Read(void *pvBuffer, size_t pSize, size_t pCount) {
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// Should be impossible
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ai_assert(m_Buffer != nullptr);
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ai_assert(nullptr != pvBuffer);
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ai_assert(0 != pSize);
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ai_assert(0 != pCount);
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// Clip down to file size
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size_t byteSize = pSize * pCount;
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if ((byteSize + m_SeekPtr) > m_Size) {
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pCount = (m_Size - m_SeekPtr) / pSize;
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byteSize = pSize * pCount;
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if (byteSize == 0) {
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return 0;
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}
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}
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std::memcpy(pvBuffer, m_Buffer.get() + m_SeekPtr, byteSize);
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m_SeekPtr += byteSize;
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return pCount;
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}
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// ----------------------------------------------------------------
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size_t ZipFile::FileSize() const {
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return m_Size;
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}
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// ----------------------------------------------------------------
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aiReturn ZipFile::Seek(size_t pOffset, aiOrigin pOrigin) {
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switch (pOrigin) {
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case aiOrigin_SET: {
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if (pOffset > m_Size) return aiReturn_FAILURE;
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m_SeekPtr = pOffset;
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return aiReturn_SUCCESS;
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}
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case aiOrigin_CUR: {
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if ((pOffset + m_SeekPtr) > m_Size) return aiReturn_FAILURE;
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m_SeekPtr += pOffset;
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return aiReturn_SUCCESS;
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}
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case aiOrigin_END: {
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if (pOffset > m_Size) return aiReturn_FAILURE;
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m_SeekPtr = m_Size - pOffset;
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return aiReturn_SUCCESS;
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}
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default:;
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}
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return aiReturn_FAILURE;
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}
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// ----------------------------------------------------------------
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size_t ZipFile::Tell() const {
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return m_SeekPtr;
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}
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// ----------------------------------------------------------------
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// pImpl of the Zip Archive IO
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class ZipArchiveIOSystem::Implement {
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public:
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static const unsigned int FileNameSize = 256;
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Implement(IOSystem *pIOHandler, const char *pFilename, const char *pMode);
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~Implement();
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bool isOpen() const;
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void getFileList(std::vector<std::string> &rFileList);
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void getFileListExtension(std::vector<std::string> &rFileList, const std::string &extension);
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bool Exists(std::string &filename);
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IOStream *OpenFile(std::string &filename);
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static void SimplifyFilename(std::string &filename);
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private:
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void MapArchive();
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private:
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typedef std::map<std::string, ZipFileInfo> ZipFileInfoMap;
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unzFile m_ZipFileHandle = nullptr;
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ZipFileInfoMap m_ArchiveMap;
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};
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// ----------------------------------------------------------------
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ZipArchiveIOSystem::Implement::Implement(IOSystem *pIOHandler, const char *pFilename, const char *pMode) {
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ai_assert(strcmp(pMode, "r") == 0);
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ai_assert(pFilename != nullptr);
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if (pFilename[0] == 0 || nullptr == pMode) {
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return;
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}
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zlib_filefunc_def mapping = IOSystem2Unzip::get(pIOHandler);
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m_ZipFileHandle = unzOpen2(pFilename, &mapping);
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}
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// ----------------------------------------------------------------
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ZipArchiveIOSystem::Implement::~Implement() {
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if (m_ZipFileHandle != nullptr) {
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unzClose(m_ZipFileHandle);
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}
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}
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// ----------------------------------------------------------------
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void ZipArchiveIOSystem::Implement::MapArchive() {
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if (m_ZipFileHandle == nullptr)
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return;
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if (!m_ArchiveMap.empty())
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return;
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// At first ensure file is already open
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if (unzGoToFirstFile(m_ZipFileHandle) != UNZ_OK)
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return;
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// Loop over all files
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do {
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char filename[FileNameSize];
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unz_file_info fileInfo;
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if (unzGetCurrentFileInfo(m_ZipFileHandle, &fileInfo, filename, FileNameSize, nullptr, 0, nullptr, 0) == UNZ_OK) {
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if (fileInfo.uncompressed_size != 0 && fileInfo.size_filename <= FileNameSize) {
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std::string filename_string(filename, fileInfo.size_filename);
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SimplifyFilename(filename_string);
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m_ArchiveMap.emplace(filename_string, ZipFileInfo(m_ZipFileHandle, fileInfo.uncompressed_size));
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}
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}
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} while (unzGoToNextFile(m_ZipFileHandle) != UNZ_END_OF_LIST_OF_FILE);
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}
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// ----------------------------------------------------------------
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bool ZipArchiveIOSystem::Implement::isOpen() const {
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return (m_ZipFileHandle != nullptr);
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}
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// ----------------------------------------------------------------
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void ZipArchiveIOSystem::Implement::getFileList(std::vector<std::string> &rFileList) {
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MapArchive();
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rFileList.clear();
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for (const auto &file : m_ArchiveMap) {
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rFileList.push_back(file.first);
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}
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}
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// ----------------------------------------------------------------
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void ZipArchiveIOSystem::Implement::getFileListExtension(std::vector<std::string> &rFileList, const std::string &extension) {
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MapArchive();
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rFileList.clear();
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for (const auto &file : m_ArchiveMap) {
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if (extension == BaseImporter::GetExtension(file.first))
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rFileList.push_back(file.first);
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}
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}
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// ----------------------------------------------------------------
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bool ZipArchiveIOSystem::Implement::Exists(std::string &filename) {
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MapArchive();
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ZipFileInfoMap::const_iterator it = m_ArchiveMap.find(filename);
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return (it != m_ArchiveMap.end());
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}
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// ----------------------------------------------------------------
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IOStream *ZipArchiveIOSystem::Implement::OpenFile(std::string &filename) {
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MapArchive();
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SimplifyFilename(filename);
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// Find in the map
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ZipFileInfoMap::const_iterator zip_it = m_ArchiveMap.find(filename);
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if (zip_it == m_ArchiveMap.cend())
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return nullptr;
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const ZipFileInfo &zip_file = (*zip_it).second;
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return zip_file.Extract(filename, m_ZipFileHandle);
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}
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// ----------------------------------------------------------------
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inline void ReplaceAll(std::string &data, const std::string &before, const std::string &after) {
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size_t pos = data.find(before);
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while (pos != std::string::npos) {
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data.replace(pos, before.size(), after);
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pos = data.find(before, pos + after.size());
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}
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}
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// ----------------------------------------------------------------
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inline void ReplaceAllChar(std::string &data, const char before, const char after) {
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size_t pos = data.find(before);
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while (pos != std::string::npos) {
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data[pos] = after;
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pos = data.find(before, pos + 1);
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}
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}
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// ----------------------------------------------------------------
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void ZipArchiveIOSystem::Implement::SimplifyFilename(std::string &filename) {
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ReplaceAllChar(filename, '\\', '/');
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// Remove all . and / from the beginning of the path
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size_t pos = filename.find_first_not_of("./");
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if (pos != 0)
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filename.erase(0, pos);
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// Simplify "my/folder/../file.png" constructions, if any
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static const std::string relative("/../");
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const size_t relsize = relative.size() - 1;
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pos = filename.find(relative);
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while (pos != std::string::npos) {
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// Previous slash
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size_t prevpos = filename.rfind('/', pos - 1);
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if (prevpos == pos)
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filename.erase(0, pos + relative.size());
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else
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filename.erase(prevpos, pos + relsize - prevpos);
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pos = filename.find(relative);
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
ZipArchiveIOSystem::ZipArchiveIOSystem(IOSystem *pIOHandler, const char *pFilename, const char *pMode) :
|
|
pImpl(new Implement(pIOHandler, pFilename, pMode)) {
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
// The ZipArchiveIO
|
|
ZipArchiveIOSystem::ZipArchiveIOSystem(IOSystem *pIOHandler, const std::string &rFilename, const char *pMode) :
|
|
pImpl(new Implement(pIOHandler, rFilename.c_str(), pMode)) {
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
ZipArchiveIOSystem::~ZipArchiveIOSystem() {
|
|
delete pImpl;
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
bool ZipArchiveIOSystem::Exists(const char *pFilename) const {
|
|
ai_assert(pFilename != nullptr);
|
|
|
|
if (pFilename == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
std::string filename(pFilename);
|
|
return pImpl->Exists(filename);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
// This is always '/' in a ZIP
|
|
char ZipArchiveIOSystem::getOsSeparator() const {
|
|
return '/';
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
// Only supports Reading
|
|
IOStream *ZipArchiveIOSystem::Open(const char *pFilename, const char *pMode) {
|
|
ai_assert(pFilename != nullptr);
|
|
|
|
for (size_t i = 0; pMode[i] != 0; ++i) {
|
|
ai_assert(pMode[i] != 'w');
|
|
if (pMode[i] == 'w')
|
|
return nullptr;
|
|
}
|
|
|
|
std::string filename(pFilename);
|
|
return pImpl->OpenFile(filename);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
void ZipArchiveIOSystem::Close(IOStream *pFile) {
|
|
delete pFile;
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
bool ZipArchiveIOSystem::isOpen() const {
|
|
return (pImpl->isOpen());
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
void ZipArchiveIOSystem::getFileList(std::vector<std::string> &rFileList) const {
|
|
return pImpl->getFileList(rFileList);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
void ZipArchiveIOSystem::getFileListExtension(std::vector<std::string> &rFileList, const std::string &extension) const {
|
|
return pImpl->getFileListExtension(rFileList, extension);
|
|
}
|
|
|
|
// ----------------------------------------------------------------
|
|
bool ZipArchiveIOSystem::isZipArchive(IOSystem *pIOHandler, const char *pFilename) {
|
|
Implement tmp(pIOHandler, pFilename, "r");
|
|
return tmp.isOpen();
|
|
}
|
|
|
|
bool ZipArchiveIOSystem::isZipArchive(IOSystem *pIOHandler, const std::string &rFilename) {
|
|
return isZipArchive(pIOHandler, rFilename.c_str());
|
|
}
|
|
|
|
} // namespace Assimp
|