190 lines
7.3 KiB
C
190 lines
7.3 KiB
C
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// ----------------------------------------------------------------------------
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// endianness
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API int is_big();
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API int is_little();
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API uint16_t swap16( uint16_t x );
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API uint32_t swap32( uint32_t x );
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API uint64_t swap64( uint64_t x );
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API float swap32f(float n);
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API double swap64f(double n);
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API uint16_t lil16(uint16_t n);
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API uint32_t lil32(uint32_t n);
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API uint64_t lil64(uint64_t n);
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API uint16_t big16(uint16_t n);
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API uint32_t big32(uint32_t n);
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API uint64_t big64(uint64_t n);
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API float lil32f(float n);
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API double lil64f(double n);
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API float big32f(float n);
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API double big64f(double n);
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API uint16_t* lil16p(void *p, int sz);
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API uint16_t* big16p(void *p, int sz);
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API uint32_t* lil32p(void *p, int sz);
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API uint32_t* big32p(void *p, int sz);
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API uint64_t* lil64p(void *p, int sz);
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API uint64_t* big64p(void *p, int sz);
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API float * lil32pf(void *p, int sz);
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API float * big32pf(void *p, int sz);
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API double * lil64pf(void *p, int sz);
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API double * big64pf(void *p, int sz);
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#if is(cl)
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#define swap16 _byteswap_ushort
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#define swap32 _byteswap_ulong
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#define swap64 _byteswap_uint64
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#elif is(gcc)
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#define swap16 __builtin_bswap16
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#define swap32 __builtin_bswap32
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#define swap64 __builtin_bswap64
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#endif
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#define hton16 big16
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#define ntoh16 big16
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#define hton32 big32
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#define ntoh32 big32
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#define hton64 big64
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#define ntoh64 big64
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#define IS_BIG ((*(uint16_t *)"\0\1") == 1)
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#define IS_LITTLE ((*(uint16_t *)"\0\1") != 1)
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// ----------------------------------------------------------------------------
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// half packing
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typedef uint16_t half;
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API float half_to_float(half value);
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API half float_to_half(float value);
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// ----------------------------------------------------------------------------
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// int packing
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// pack16i() -- store a 16-bit int into a char buffer (like htons())
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// pack32i() -- store a 32-bit int into a char buffer (like htonl())
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// pack64i() -- store a 64-bit int into a char buffer (like htonl())
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API void pack16i(uint8_t *buf, uint16_t i, int swap);
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API void pack32i(uint8_t *buf, uint32_t i, int swap);
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API void pack64i(uint8_t *buf, uint64_t i, int swap);
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// unpack16i() -- unpack a 16-bit int from a char buffer (like ntohs())
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// unpack32i() -- unpack a 32-bit int from a char buffer (like ntohl())
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// unpack64i() -- unpack a 64-bit int from a char buffer (like ntohl())
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// changes unsigned numbers to signed if needed.
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API int16_t unpack16i(const uint8_t *buf, int swap);
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API int32_t unpack32i(const uint8_t *buf, int swap);
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API int64_t unpack64i(const uint8_t *buf, int swap);
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// ----------------------------------------------------------------------------
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// float un/packing: 8 (micro), 16 (half), 32 (float), 64 (double) types
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#define pack754_8(f) ( pack754((f), 8, 4))
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#define pack754_16(f) ( pack754((f), 16, 5))
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#define pack754_32(f) ( pack754((f), 32, 8))
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#define pack754_64(f) ( pack754((f), 64, 11))
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#define unpack754_8(u) (unpack754((u), 8, 4))
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#define unpack754_16(u) (unpack754((u), 16, 5))
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#define unpack754_32(u) (unpack754((u), 32, 8))
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#define unpack754_64(u) (unpack754((u), 64, 11))
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API uint64_t pack754(long double f, unsigned bits, unsigned expbits);
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API long double unpack754(uint64_t i, unsigned bits, unsigned expbits);
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// ----------------------------------------------------------------------------
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// variable-length integer packing
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API uint64_t pack64uv( uint8_t *buffer, uint64_t value );
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API uint64_t unpack64uv( const uint8_t *buffer, uint64_t *value );
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API uint64_t pack64iv( uint8_t *buffer, int64_t value_ );
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API uint64_t unpack64iv( const uint8_t *buffer, int64_t *value );
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// ----------------------------------------------------------------------------
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// msgpack v5, schema based struct/buffer bitpacking
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// api v2
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API int msgpack(const char *fmt, ... ); // va arg pack "n,b,u,d/i,s,p,f/g,e,[,{"
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API bool msgunpack(const char *fmt, ... ); // va arg pack "n,b,u,d/i,s,p,f/g,e,[,{"
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// api v1
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API int msgpack_new(uint8_t *w, size_t l);
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API int msgpack_nil(); // write null
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API int msgpack_chr(bool n); // write boolean
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API int msgpack_uns(uint64_t n); // write unsigned integer
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API int msgpack_int(int64_t n); // write integer
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API int msgpack_str(const char *s); // write string
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API int msgpack_bin(const char *s, size_t n); // write binary pointer
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API int msgpack_flt(double g); // write real
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API int msgpack_ext(uint8_t key, void *val, size_t n); // write extension type
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API int msgpack_arr(uint32_t n); // write array mark for next N items
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API int msgpack_map(uint32_t n); // write map mark for next N pairs (N keys + N values)
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API int msgpack_eof(); // write full?
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API int msgpack_err(); // write error?
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API bool msgunpack_new( const void *opaque_or_FILE, size_t bytes );
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API bool msgunpack_nil();
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API bool msgunpack_chr(bool *chr);
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API bool msgunpack_uns(uint64_t *uns);
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API bool msgunpack_int(int64_t *sig);
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API bool msgunpack_str(char **str);
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API bool msgunpack_bin(void **bin, uint64_t *len);
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API bool msgunpack_flt(float *flt);
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API bool msgunpack_dbl(double *dbl);
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API bool msgunpack_ext(uint8_t *key, void **val, uint64_t *len);
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API bool msgunpack_arr(uint64_t *len);
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API bool msgunpack_map(uint64_t *len);
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API bool msgunpack_eof();
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API bool msgunpack_err();
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// ----------------------------------------------------------------------------
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// Based on code by Brian "Beej Jorgensen" Hall (public domain) [1].
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// Based on code by Ginger Bill's half<->float (public domain) [2].
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// - rlyeh, public domain.
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//
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// pack.c -- perl/python-ish pack/unpack functions
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// like printf and scanf, but for binary data.
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//
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// format flags:
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// (<) little endian (>) big endian (! also) (=) native endian
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// (c) 8-bit char (b) 8-bit byte
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// (h) 16-bit half (w) 16-bit word
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// (i) 32-bit integer (u) 32-bit unsigned (f) 32-bit float
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// (l) 64-bit long (q) 64-bit quad (d) 64-bit double
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// (v) varint
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// (s) string (64-bit varint length prepended)
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// (S) string (32-bit fixed length prepended)
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// (m) memblock (64-bit varint length prepended)
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// (M) memblock (32-bit fixed length prepended)
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// (z) memblock (zeroed)
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// (#) number of arguments processed (only when unpacking)
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//
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// @todo:
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// - (x) document & test flag
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// @totest:
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// - (s) string (64-bit variable length automatically prepended)
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// - (S) string (32-bit fixed length automatically prepended)
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// - (m) memblock (64-bit variable length automatically prepended)
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// - (M) memblock (32-bit fixed length automatically prepended)
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// - (z) memblock (zeroed)
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// - (#) number of arguments processed (only when unpacking)
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// - save data dictated by the format string from the buffer. return: number of bytes written, or 0 if error.
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// if first argument is zero, returns number of bytes required for packing.
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API int savef(FILE *file, const char *format, ...);
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API int saveb(unsigned char *buf, const char *format, ...);
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// - load data dictated by the format string into the buffer. return: number of bytes read, or 0 if error.
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// if first argument is zero, returns number of bytes required for unpacking.
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API int loadf(FILE *file, const char *format, ...);
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API int loadb(const unsigned char *buf, const char *format, ...);
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