void BZ2Stream::write(void* ptr, size_t size) {
BZ2_bzWrite(&bzerror_, bzfile_, ptr, size);
switch (bzerror_) {
case BZ_IO_ERROR: throw BagException("BZ_IO_ERROR: error writing the compressed file");
}
setCompressedIn(getCompressedIn() + size);
}
void BZ2Stream::startRead() {
bzfile_ = BZ2_bzReadOpen(&bzerror_, getFilePointer(), verbosity_, 0, getUnused(), getUnusedLength());
switch (bzerror_) {
case BZ_OK: break;
default: {
BZ2_bzReadClose(&bzerror_, bzfile_);
throw BagException("Error opening file for reading compressed stream");
}
}
clearUnused();
}
void BZ2Stream::startWrite() {
bzfile_ = BZ2_bzWriteOpen(&bzerror_, getFilePointer(), block_size_100k_, verbosity_, work_factor_);
switch (bzerror_) {
case BZ_OK: break;
default: {
BZ2_bzWriteClose(&bzerror_, bzfile_, 0, NULL, NULL);
throw BagException("Error opening file for writing compressed stream");
}
}
setCompressedIn(0);
}
void BZ2Stream::decompress(uint8_t* dest, unsigned int dest_len, uint8_t* source, unsigned int source_len) {
int result = BZ2_bzBuffToBuffDecompress((char*) dest, &dest_len, (char*) source, source_len, 0, verbosity_);
switch (result) {
case BZ_OK: break;
case BZ_CONFIG_ERROR: throw BagException("library has been mis-compiled"); break;
case BZ_PARAM_ERROR: throw BagException("dest is NULL or destLen is NULL or small != 0 && small != 1 or verbosity < 0 or verbosity > 4"); break;
case BZ_MEM_ERROR: throw BagException("insufficient memory is available"); break;
case BZ_OUTBUFF_FULL: throw BagException("size of the compressed data exceeds *destLen"); break;
case BZ_DATA_ERROR: throw BagException("data integrity error was detected in the compressed data"); break;
case BZ_DATA_ERROR_MAGIC: throw BagException("compressed data doesn't begin with the right magic bytes"); break;
case BZ_UNEXPECTED_EOF: throw BagException("compressed data ends unexpectedly"); break;
}
}
void UncompressedStream::decompress(uint8_t* dest, unsigned int dest_len, uint8_t* source, unsigned int source_len) {
if (dest_len < source_len)
throw BagException("dest_len not large enough");
memcpy(dest, source, source_len);
}