|
| 1 | +#include "compression.h" |
| 2 | + |
| 3 | +#ifdef ZLIB_FOUND |
| 4 | +GZipDecoder::GZipDecoder(const std::string& path, size_t size) : Decoder(path, size) |
| 5 | +{ |
| 6 | + stream_.zalloc = Z_NULL; |
| 7 | + stream_.zfree = Z_NULL; |
| 8 | + stream_.opaque = Z_NULL; |
| 9 | + stream_.avail_in = 0; |
| 10 | + stream_.next_in = Z_NULL; |
| 11 | + if (inflateInit2(&stream_, 16 + MAX_WBITS) != Z_OK) |
| 12 | + log_fatal("Error initializing gzip decoder: %s", stream_.msg); |
| 13 | +} |
| 14 | + |
| 15 | +GZipDecoder::~GZipDecoder() |
| 16 | +{ |
| 17 | + inflateEnd(&stream_); |
| 18 | +} |
| 19 | + |
| 20 | +int GZipDecoder::decode() |
| 21 | +{ |
| 22 | + int ret = inflate(&stream_, Z_NO_FLUSH); |
| 23 | + if (ret != Z_OK && ret != Z_STREAM_END) { |
| 24 | + log_error("Error running gzip decoder: %s", stream_.msg); |
| 25 | + return ret; |
| 26 | + } |
| 27 | + return 0; |
| 28 | +} |
| 29 | + |
| 30 | +GZipEncoder::GZipEncoder(const std::string& path, size_t size) : Encoder(path, size) |
| 31 | +{ |
| 32 | + stream_.zalloc = Z_NULL; |
| 33 | + stream_.zfree = Z_NULL; |
| 34 | + stream_.opaque = Z_NULL; |
| 35 | + if (deflateInit2(&stream_, Z_DEFAULT_COMPRESSION, Z_DEFLATED, |
| 36 | + 16 + MAX_WBITS, 8, Z_DEFAULT_STRATEGY) != Z_OK) |
| 37 | + log_fatal("Error initializing gzip encoder: %s", stream_.msg); |
| 38 | +} |
| 39 | + |
| 40 | +GZipEncoder::~GZipEncoder() |
| 41 | +{ |
| 42 | + sync(); |
| 43 | + deflateEnd(&stream_); |
| 44 | +} |
| 45 | + |
| 46 | +int GZipEncoder::encode(bool flush) |
| 47 | +{ |
| 48 | + int ret = deflate(&stream_, flush ? Z_FINISH : Z_NO_FLUSH); |
| 49 | + if (ret == Z_STREAM_ERROR) { |
| 50 | + log_error("Error running gzip encoder: %s", stream_.msg); |
| 51 | + return ret; |
| 52 | + } |
| 53 | + return 0; |
| 54 | +} |
| 55 | +#endif |
| 56 | + |
| 57 | +#ifdef BZIP2_FOUND |
| 58 | +BZip2Decoder::BZip2Decoder(const std::string& path, size_t size) : Decoder(path, size) |
| 59 | +{ |
| 60 | + stream_.bzalloc = nullptr; |
| 61 | + stream_.bzfree = nullptr; |
| 62 | + stream_.opaque = nullptr; |
| 63 | + stream_.avail_in = 0; |
| 64 | + stream_.next_in = nullptr; |
| 65 | + if (BZ2_bzDecompressInit(&stream_, 0, 0) != BZ_OK) |
| 66 | + log_fatal("Error initializing bzip2 decoder"); |
| 67 | +} |
| 68 | + |
| 69 | +BZip2Decoder::~BZip2Decoder() |
| 70 | +{ |
| 71 | + BZ2_bzDecompressEnd(&stream_); |
| 72 | +} |
| 73 | + |
| 74 | +int BZip2Decoder::decode() |
| 75 | +{ |
| 76 | + int ret = BZ2_bzDecompress(&stream_); |
| 77 | + if (ret != BZ_OK && ret != BZ_STREAM_END) { |
| 78 | + log_error("Error running bzip2 decoder"); |
| 79 | + return ret; |
| 80 | + } |
| 81 | + return 0; |
| 82 | +} |
| 83 | + |
| 84 | +BZip2Encoder::BZip2Encoder(const std::string& path, size_t size) : Encoder(path, size) |
| 85 | +{ |
| 86 | + stream_.bzalloc = nullptr; |
| 87 | + stream_.bzfree = nullptr; |
| 88 | + stream_.opaque = nullptr; |
| 89 | + if (BZ2_bzCompressInit(&stream_, 9, 0, 0) != BZ_OK) |
| 90 | + log_fatal("Error initializing bzip2 encoder"); |
| 91 | +} |
| 92 | + |
| 93 | +BZip2Encoder::~BZip2Encoder() |
| 94 | +{ |
| 95 | + sync(); |
| 96 | + BZ2_bzCompressEnd(&stream_); |
| 97 | +} |
| 98 | + |
| 99 | +int BZip2Encoder::encode(bool flush) |
| 100 | +{ |
| 101 | + int ret = BZ2_bzCompress(&stream_, flush ? BZ_FINISH : BZ_RUN); |
| 102 | + if (ret == BZ_SEQUENCE_ERROR) { |
| 103 | + log_error("Error running bzip2 encoder"); |
| 104 | + return ret; |
| 105 | + } |
| 106 | + return 0; |
| 107 | +} |
| 108 | +#endif |
| 109 | + |
| 110 | +#ifdef LZMA_FOUND |
| 111 | +LZMADecoder::LZMADecoder(const std::string& path, size_t size) : Decoder(path, size) |
| 112 | +{ |
| 113 | + stream_ = LZMA_STREAM_INIT; |
| 114 | + lzma_ret ret = lzma_stream_decoder(&stream_, UINT64_MAX, |
| 115 | + LZMA_CONCATENATED); |
| 116 | + if (ret != LZMA_OK) |
| 117 | + log_fatal("Error initializing LZMA decoder."); |
| 118 | +} |
| 119 | + |
| 120 | +LZMADecoder::~LZMADecoder() |
| 121 | +{ |
| 122 | + lzma_end(&stream_); |
| 123 | +} |
| 124 | + |
| 125 | +int LZMADecoder::decode() |
| 126 | +{ |
| 127 | + lzma_ret ret = lzma_code(&stream_, LZMA_RUN); |
| 128 | + if (ret != LZMA_OK && ret != LZMA_STREAM_END) { |
| 129 | + log_error("Error running LZMA decoder"); |
| 130 | + return ret; |
| 131 | + } |
| 132 | + return 0; |
| 133 | +} |
| 134 | + |
| 135 | +LZMAEncoder::LZMAEncoder(const std::string& path, size_t size) : Encoder(path, size) |
| 136 | +{ |
| 137 | + stream_ = LZMA_STREAM_INIT; |
| 138 | + lzma_ret ret = lzma_easy_encoder(&stream_, LZMA_PRESET_DEFAULT, |
| 139 | + LZMA_CHECK_CRC64); |
| 140 | + if (ret != LZMA_OK) |
| 141 | + log_fatal("Error initializing LZMA encoder."); |
| 142 | +} |
| 143 | + |
| 144 | +LZMAEncoder::~LZMAEncoder() |
| 145 | +{ |
| 146 | + sync(); |
| 147 | + lzma_end(&stream_); |
| 148 | +} |
| 149 | + |
| 150 | +int LZMAEncoder::encode(bool flush) |
| 151 | +{ |
| 152 | + lzma_action action = flush ? LZMA_FINISH : LZMA_RUN; |
| 153 | + lzma_ret ret = lzma_code(&stream_, action); |
| 154 | + if (ret != LZMA_OK && ret != LZMA_STREAM_END) { |
| 155 | + log_error("Error running LZMA encoder"); |
| 156 | + return ret; |
| 157 | + } |
| 158 | + return 0; |
| 159 | +} |
| 160 | +#endif |
0 commit comments