_gpak_compressor_deflate _gpak_compressor_generate_dictionary _gpak_compressor_none _gpak_compressor_zstd _gpak_decompressor_inflate _gpak_decompressor_none _gpak_decompressor_zstd

_gpak_compressor_deflate() GPAK_API uint32_t _gpak_compressor_deflate ( gpak_t *  _pak, FILE *  _infile, FILE *  _outfile  ) Brief Description:\n Compresses the input file using the Deflate algorithm. This function compresses the input file using the Deflate algorithm and writes the compressed data to the output file. Parameters _pak A pointer to the gpak_t. _infile A pointer to the input FILE. _outfile A pointer to the output FILE. Returns The number of bytes written to the output file. Definition at line 97 of file gpak_compressors.c. { z_stream strm; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; char* _bufferIn = (char*)malloc(_DEFAULT_BLOCK_SIZE); char* _bufferOut = (char*)malloc(_DEFAULT_BLOCK_SIZE); fseek(_infile, 0, SEEK_END); size_t _total_size = ftell(_infile); fseek(_infile, 0, SEEK_SET); int ret = deflateInit(&strm, _pak->header_.compression_level_); if (ret != Z_OK) return _gpak_make_error(_pak, GPAK_ERROR_DEFLATE_INIT); uint32_t _crc32 = crc32(0L, Z_NULL, 0); int flush; unsigned have; size_t _total_readed = 0ull; do { strm.avail_in = _freadb(_bufferIn, 1ull, _DEFAULT_BLOCK_SIZE, _infile); _total_readed += strm.avail_in; _crc32 = crc32(_crc32, _bufferIn, strm.avail_in); _gpak_pass_progress(_pak, _total_readed, _total_size, GPAK_STAGE_COMPRESSION); if (ferror(_infile)) { _gpak_make_error(_pak, GPAK_ERROR_READ); goto end; } flush = feof(_infile) ? Z_FINISH : Z_NO_FLUSH; strm.next_in = _bufferIn; do { strm.avail_out = _DEFAULT_BLOCK_SIZE; strm.next_out = _bufferOut; ret = deflate(&strm, flush); assert(ret != Z_STREAM_ERROR); have = _DEFAULT_BLOCK_SIZE - strm.avail_out; if (_fwriteb(_bufferOut, 1ull, have, _outfile) != have || ferror(_outfile)) { _gpak_make_error(_pak, GPAK_ERROR_WRITE); goto end; } } while (strm.avail_out == 0); assert(strm.avail_in == 0); } while (flush != Z_FINISH); end: deflateEnd(&strm); free(_bufferIn); free(_bufferOut); return _crc32; }