| 286 | |
| 287 | |
| 288 | bool Unpack::ReadVMCode() |
| 289 | { |
| 290 | // Entire VM code is guaranteed to fully present in block defined |
| 291 | // by current Huffman table. Compressor checks that VM code does not cross |
| 292 | // Huffman block boundaries. |
| 293 | uint FirstByte=Inp.getbits()>>8; |
| 294 | Inp.addbits(8); |
| 295 | uint Length=(FirstByte & 7)+1; |
| 296 | if (Length==7) |
| 297 | { |
| 298 | Length=(Inp.getbits()>>8)+7; |
| 299 | Inp.addbits(8); |
| 300 | } |
| 301 | else |
| 302 | if (Length==8) |
| 303 | { |
| 304 | Length=Inp.getbits(); |
| 305 | Inp.addbits(16); |
| 306 | } |
| 307 | if (Length==0) |
| 308 | return false; |
| 309 | Array<byte> VMCode(Length); |
| 310 | for (uint I=0;I<Length;I++) |
| 311 | { |
| 312 | // Try to read the new buffer if only one byte is left. |
| 313 | // But if we read all bytes except the last, one byte is enough. |
| 314 | if (Inp.InAddr>=ReadTop-1 && !UnpReadBuf30() && I<Length-1) |
| 315 | return false; |
| 316 | VMCode[I]=Inp.getbits()>>8; |
| 317 | Inp.addbits(8); |
| 318 | } |
| 319 | return AddVMCode(FirstByte,&VMCode[0],Length); |
| 320 | } |
| 321 | |
| 322 | |
| 323 | bool Unpack::ReadVMCodePPM() |