[834] | 1 | // Copyright FreeHEP, 2005. |
---|
| 2 | |
---|
| 3 | #include "cheprep/DeflateOutputStreamBuffer.h" |
---|
| 4 | |
---|
| 5 | /** |
---|
| 6 | * @author Mark Donszelmann |
---|
| 7 | * @version $Id: DeflateOutputStreamBuffer.cc,v 1.6 2005/06/02 21:28:45 duns Exp $ |
---|
| 8 | */ |
---|
| 9 | namespace cheprep { |
---|
| 10 | |
---|
| 11 | using namespace std; |
---|
| 12 | |
---|
| 13 | unsigned long DeflateOutputStreamBuffer::crctable[] = { |
---|
| 14 | 0x00000000L, 0x77073096L, 0xEE0E612CL, 0x990951BAL, |
---|
| 15 | 0x076DC419L, 0x706AF48FL, 0xE963A535L, 0x9E6495A3L, |
---|
| 16 | 0x0EDB8832L, 0x79DCB8A4L, 0xE0D5E91EL, 0x97D2D988L, |
---|
| 17 | 0x09B64C2BL, 0x7EB17CBDL, 0xE7B82D07L, 0x90BF1D91L, |
---|
| 18 | 0x1DB71064L, 0x6AB020F2L, 0xF3B97148L, 0x84BE41DEL, |
---|
| 19 | 0x1ADAD47DL, 0x6DDDE4EBL, 0xF4D4B551L, 0x83D385C7L, |
---|
| 20 | 0x136C9856L, 0x646BA8C0L, 0xFD62F97AL, 0x8A65C9ECL, |
---|
| 21 | 0x14015C4FL, 0x63066CD9L, 0xFA0F3D63L, 0x8D080DF5L, |
---|
| 22 | 0x3B6E20C8L, 0x4C69105EL, 0xD56041E4L, 0xA2677172L, |
---|
| 23 | 0x3C03E4D1L, 0x4B04D447L, 0xD20D85FDL, 0xA50AB56BL, |
---|
| 24 | 0x35B5A8FAL, 0x42B2986CL, 0xDBBBC9D6L, 0xACBCF940L, |
---|
| 25 | 0x32D86CE3L, 0x45DF5C75L, 0xDCD60DCFL, 0xABD13D59L, |
---|
| 26 | 0x26D930ACL, 0x51DE003AL, 0xC8D75180L, 0xBFD06116L, |
---|
| 27 | 0x21B4F4B5L, 0x56B3C423L, 0xCFBA9599L, 0xB8BDA50FL, |
---|
| 28 | 0x2802B89EL, 0x5F058808L, 0xC60CD9B2L, 0xB10BE924L, |
---|
| 29 | 0x2F6F7C87L, 0x58684C11L, 0xC1611DABL, 0xB6662D3DL, |
---|
| 30 | 0x76DC4190L, 0x01DB7106L, 0x98D220BCL, 0xEFD5102AL, |
---|
| 31 | 0x71B18589L, 0x06B6B51FL, 0x9FBFE4A5L, 0xE8B8D433L, |
---|
| 32 | 0x7807C9A2L, 0x0F00F934L, 0x9609A88EL, 0xE10E9818L, |
---|
| 33 | 0x7F6A0DBBL, 0x086D3D2DL, 0x91646C97L, 0xE6635C01L, |
---|
| 34 | 0x6B6B51F4L, 0x1C6C6162L, 0x856530D8L, 0xF262004EL, |
---|
| 35 | 0x6C0695EDL, 0x1B01A57BL, 0x8208F4C1L, 0xF50FC457L, |
---|
| 36 | 0x65B0D9C6L, 0x12B7E950L, 0x8BBEB8EAL, 0xFCB9887CL, |
---|
| 37 | 0x62DD1DDFL, 0x15DA2D49L, 0x8CD37CF3L, 0xFBD44C65L, |
---|
| 38 | 0x4DB26158L, 0x3AB551CEL, 0xA3BC0074L, 0xD4BB30E2L, |
---|
| 39 | 0x4ADFA541L, 0x3DD895D7L, 0xA4D1C46DL, 0xD3D6F4FBL, |
---|
| 40 | 0x4369E96AL, 0x346ED9FCL, 0xAD678846L, 0xDA60B8D0L, |
---|
| 41 | 0x44042D73L, 0x33031DE5L, 0xAA0A4C5FL, 0xDD0D7CC9L, |
---|
| 42 | 0x5005713CL, 0x270241AAL, 0xBE0B1010L, 0xC90C2086L, |
---|
| 43 | 0x5768B525L, 0x206F85B3L, 0xB966D409L, 0xCE61E49FL, |
---|
| 44 | 0x5EDEF90EL, 0x29D9C998L, 0xB0D09822L, 0xC7D7A8B4L, |
---|
| 45 | 0x59B33D17L, 0x2EB40D81L, 0xB7BD5C3BL, 0xC0BA6CADL, |
---|
| 46 | 0xEDB88320L, 0x9ABFB3B6L, 0x03B6E20CL, 0x74B1D29AL, |
---|
| 47 | 0xEAD54739L, 0x9DD277AFL, 0x04DB2615L, 0x73DC1683L, |
---|
| 48 | 0xE3630B12L, 0x94643B84L, 0x0D6D6A3EL, 0x7A6A5AA8L, |
---|
| 49 | 0xE40ECF0BL, 0x9309FF9DL, 0x0A00AE27L, 0x7D079EB1L, |
---|
| 50 | 0xF00F9344L, 0x8708A3D2L, 0x1E01F268L, 0x6906C2FEL, |
---|
| 51 | 0xF762575DL, 0x806567CBL, 0x196C3671L, 0x6E6B06E7L, |
---|
| 52 | 0xFED41B76L, 0x89D32BE0L, 0x10DA7A5AL, 0x67DD4ACCL, |
---|
| 53 | 0xF9B9DF6FL, 0x8EBEEFF9L, 0x17B7BE43L, 0x60B08ED5L, |
---|
| 54 | 0xD6D6A3E8L, 0xA1D1937EL, 0x38D8C2C4L, 0x4FDFF252L, |
---|
| 55 | 0xD1BB67F1L, 0xA6BC5767L, 0x3FB506DDL, 0x48B2364BL, |
---|
| 56 | 0xD80D2BDAL, 0xAF0A1B4CL, 0x36034AF6L, 0x41047A60L, |
---|
| 57 | 0xDF60EFC3L, 0xA867DF55L, 0x316E8EEFL, 0x4669BE79L, |
---|
| 58 | 0xCB61B38CL, 0xBC66831AL, 0x256FD2A0L, 0x5268E236L, |
---|
| 59 | 0xCC0C7795L, 0xBB0B4703L, 0x220216B9L, 0x5505262FL, |
---|
| 60 | 0xC5BA3BBEL, 0xB2BD0B28L, 0x2BB45A92L, 0x5CB36A04L, |
---|
| 61 | 0xC2D7FFA7L, 0xB5D0CF31L, 0x2CD99E8BL, 0x5BDEAE1DL, |
---|
| 62 | 0x9B64C2B0L, 0xEC63F226L, 0x756AA39CL, 0x026D930AL, |
---|
| 63 | 0x9C0906A9L, 0xEB0E363FL, 0x72076785L, 0x05005713L, |
---|
| 64 | 0x95BF4A82L, 0xE2B87A14L, 0x7BB12BAEL, 0x0CB61B38L, |
---|
| 65 | 0x92D28E9BL, 0xE5D5BE0DL, 0x7CDCEFB7L, 0x0BDBDF21L, |
---|
| 66 | 0x86D3D2D4L, 0xF1D4E242L, 0x68DDB3F8L, 0x1FDA836EL, |
---|
| 67 | 0x81BE16CDL, 0xF6B9265BL, 0x6FB077E1L, 0x18B74777L, |
---|
| 68 | 0x88085AE6L, 0xFF0F6A70L, 0x66063BCAL, 0x11010B5CL, |
---|
| 69 | 0x8F659EFFL, 0xF862AE69L, 0x616BFFD3L, 0x166CCF45L, |
---|
| 70 | 0xA00AE278L, 0xD70DD2EEL, 0x4E048354L, 0x3903B3C2L, |
---|
| 71 | 0xA7672661L, 0xD06016F7L, 0x4969474DL, 0x3E6E77DBL, |
---|
| 72 | 0xAED16A4AL, 0xD9D65ADCL, 0x40DF0B66L, 0x37D83BF0L, |
---|
| 73 | 0xA9BCAE53L, 0xDEBB9EC5L, 0x47B2CF7FL, 0x30B5FFE9L, |
---|
| 74 | 0xBDBDF21CL, 0xCABAC28AL, 0x53B39330L, 0x24B4A3A6L, |
---|
| 75 | 0xBAD03605L, 0xCDD70693L, 0x54DE5729L, 0x23D967BFL, |
---|
| 76 | 0xB3667A2EL, 0xC4614AB8L, 0x5D681B02L, 0x2A6F2B94L, |
---|
| 77 | 0xB40BBE37L, 0xC30C8EA1L, 0x5A05DF1BL, 0x2D02EF8DL |
---|
| 78 | }; |
---|
| 79 | |
---|
| 80 | DeflateOutputStreamBuffer::DeflateOutputStreamBuffer(streambuf *buffer) |
---|
| 81 | : buffer(buffer) |
---|
| 82 | , crc(0) |
---|
| 83 | , size(0) |
---|
| 84 | #ifndef CHEPREP_NO_ZLIB |
---|
| 85 | , zStreamOpen(false) |
---|
| 86 | , in(inSize) |
---|
| 87 | , out(outSize) |
---|
| 88 | #endif // CHEPREP_NO_ZLIB |
---|
| 89 | { |
---|
| 90 | |
---|
| 91 | #ifndef CHEPREP_NO_ZLIB |
---|
| 92 | zStream.zalloc = Z_NULL; |
---|
| 93 | zStream.zfree = Z_NULL; |
---|
| 94 | zStream.opaque = Z_NULL; |
---|
| 95 | #endif // CHEPREP_NO_ZLIB |
---|
| 96 | } |
---|
| 97 | |
---|
| 98 | |
---|
| 99 | void DeflateOutputStreamBuffer::init(bool compress) { |
---|
| 100 | |
---|
| 101 | #ifndef CHEPREP_NO_ZLIB |
---|
| 102 | if (compress) { |
---|
| 103 | if (zStreamOpen) return; |
---|
| 104 | |
---|
| 105 | zStream.next_in = reinterpret_cast<unsigned char *>(&(in[0])); |
---|
| 106 | zStream.avail_in = 0 ; |
---|
| 107 | |
---|
| 108 | zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0])); |
---|
| 109 | zStream.avail_out = out.size(); |
---|
| 110 | |
---|
| 111 | if (deflateInit2(&zStream, 6, Z_DEFLATED, -MAX_WBITS, 8, Z_DEFAULT_STRATEGY ) != Z_OK) { |
---|
| 112 | cerr << "ERROR: deflateInit2 failed" << endl; |
---|
| 113 | } else { |
---|
| 114 | zStreamOpen = true; |
---|
| 115 | setp(&(in[0]), &(in[0])+inSize); |
---|
| 116 | } |
---|
| 117 | } |
---|
| 118 | #else |
---|
| 119 | // suppress warning about unused var |
---|
| 120 | compress = false; |
---|
| 121 | #endif // CHEPREP_NO_ZLIB |
---|
| 122 | |
---|
| 123 | crc = 0; |
---|
| 124 | size = 0; |
---|
| 125 | } |
---|
| 126 | |
---|
| 127 | void DeflateOutputStreamBuffer::finish() { |
---|
| 128 | |
---|
| 129 | #ifndef CHEPREP_NO_ZLIB |
---|
| 130 | if (zStreamOpen) { |
---|
| 131 | |
---|
| 132 | overflow() ; |
---|
| 133 | |
---|
| 134 | zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0])); |
---|
| 135 | zStream.avail_out = outSize; |
---|
| 136 | |
---|
| 137 | int err = Z_OK ; |
---|
| 138 | while ( err == Z_OK ) { |
---|
| 139 | if (zStream.avail_out == 0) { |
---|
| 140 | flushOut(); |
---|
| 141 | } |
---|
| 142 | err = deflate(&zStream, Z_FINISH); |
---|
| 143 | } |
---|
| 144 | |
---|
| 145 | flushOut() ; |
---|
| 146 | |
---|
| 147 | if (err != Z_STREAM_END) { |
---|
| 148 | cerr << "ERROR: deflation failed" << endl; |
---|
| 149 | } |
---|
| 150 | |
---|
| 151 | if (deflateEnd(&zStream) != Z_OK) { |
---|
| 152 | cerr << "ERROR: deflateEnd failed" << endl; |
---|
| 153 | } |
---|
| 154 | |
---|
| 155 | zStreamOpen = false ; |
---|
| 156 | } |
---|
| 157 | #endif // CHEPREP_NO_ZLIB |
---|
| 158 | } |
---|
| 159 | |
---|
| 160 | DeflateOutputStreamBuffer::~DeflateOutputStreamBuffer() { |
---|
| 161 | } |
---|
| 162 | |
---|
| 163 | |
---|
| 164 | #ifndef CHEPREP_NO_ZLIB |
---|
| 165 | #define DO1 crc = crctable[(crc ^ (*buf++)) & 0xff] ^ (crc >> 8) |
---|
| 166 | #define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1 |
---|
| 167 | #endif // CHEPREP_NO_ZLIB |
---|
| 168 | |
---|
| 169 | |
---|
| 170 | int DeflateOutputStreamBuffer::overflow(int c) { |
---|
| 171 | |
---|
| 172 | #ifndef CHEPREP_NO_ZLIB |
---|
| 173 | if (zStreamOpen) { |
---|
| 174 | zStream.avail_in = pptr() - pbase() ; |
---|
| 175 | zStream.next_in = reinterpret_cast<unsigned char *>(&(in[0])); |
---|
| 176 | |
---|
| 177 | int len = zStream.avail_in; |
---|
| 178 | unsigned char* buf = zStream.next_in; |
---|
| 179 | |
---|
| 180 | crc = crc ^ 0xffffffffUL; |
---|
| 181 | while (len >= 8) { |
---|
| 182 | DO8; |
---|
| 183 | len -= 8; |
---|
| 184 | } |
---|
| 185 | if (len) do { |
---|
| 186 | DO1; |
---|
| 187 | } while (--len); |
---|
| 188 | crc = crc ^ 0xffffffffUL; |
---|
| 189 | |
---|
| 190 | size += zStream.avail_in; |
---|
| 191 | |
---|
| 192 | zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0])); |
---|
| 193 | zStream.avail_out = outSize ; |
---|
| 194 | |
---|
| 195 | int err = Z_OK ; |
---|
| 196 | while ((zStream.avail_in > 0 || zStream.avail_out == 0) && err == Z_OK) { |
---|
| 197 | if (zStream.avail_out == 0 ) { |
---|
| 198 | flushOut(); |
---|
| 199 | } |
---|
| 200 | err = deflate(&zStream, Z_NO_FLUSH); |
---|
| 201 | } |
---|
| 202 | |
---|
| 203 | flushOut(); |
---|
| 204 | |
---|
| 205 | setp(&(in[0]), &(in[0]) + inSize); |
---|
| 206 | |
---|
| 207 | if ((err != Z_OK) && (err != Z_STREAM_END)) { |
---|
| 208 | cerr << "ERROR: deflation failed" << endl; |
---|
| 209 | return EOF ; |
---|
| 210 | } |
---|
| 211 | |
---|
| 212 | if ( c != EOF ) { |
---|
| 213 | *pptr() = c ; |
---|
| 214 | pbump(1); |
---|
| 215 | } |
---|
| 216 | |
---|
| 217 | return 0 ; |
---|
| 218 | } else { |
---|
| 219 | #endif // CHEPREP_NO_ZLIB |
---|
| 220 | crc = crc ^ 0xffffffffUL; |
---|
| 221 | crc = crctable[(crc ^ c) & 0xff] ^ (crc >> 8); |
---|
| 222 | crc = crc ^ 0xffffffffUL; |
---|
| 223 | size++; |
---|
| 224 | return buffer->sputc((char)c); |
---|
| 225 | #ifndef CHEPREP_NO_ZLIB |
---|
| 226 | } |
---|
| 227 | #endif // CHEPREP_NO_ZLIB |
---|
| 228 | } |
---|
| 229 | |
---|
| 230 | |
---|
| 231 | #ifndef CHEPREP_NO_ZLIB |
---|
| 232 | bool DeflateOutputStreamBuffer::flushOut() { |
---|
| 233 | int deflatedCount = outSize - zStream.avail_out; |
---|
| 234 | int byteCount = buffer->sputn(&(out[0]), deflatedCount); |
---|
| 235 | |
---|
| 236 | zStream.next_out = reinterpret_cast<unsigned char *>(&(out[0])); |
---|
| 237 | zStream.avail_out = outSize ; |
---|
| 238 | |
---|
| 239 | return deflatedCount == byteCount ; |
---|
| 240 | } |
---|
| 241 | #endif // CHEPREP_NO_ZLIB |
---|
| 242 | |
---|
| 243 | } // cheprep |
---|