in contrib/libz/contrib/minizip/unzip.c [1684:1886]
extern int ZEXPORT unzReadCurrentFile (unzFile file, voidp buf, unsigned len)
{
int err=UNZ_OK;
uInt iRead = 0;
unz64_s* s;
file_in_zip64_read_info_s* pfile_in_zip_read_info;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz64_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
if (pfile_in_zip_read_info->read_buffer == NULL)
return UNZ_END_OF_LIST_OF_FILE;
if (len==0)
return 0;
pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
pfile_in_zip_read_info->stream.avail_out = (uInt)len;
if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
(!(pfile_in_zip_read_info->raw)))
pfile_in_zip_read_info->stream.avail_out =
(uInt)pfile_in_zip_read_info->rest_read_uncompressed;
if ((len>pfile_in_zip_read_info->rest_read_compressed+
pfile_in_zip_read_info->stream.avail_in) &&
(pfile_in_zip_read_info->raw))
pfile_in_zip_read_info->stream.avail_out =
(uInt)pfile_in_zip_read_info->rest_read_compressed+
pfile_in_zip_read_info->stream.avail_in;
while (pfile_in_zip_read_info->stream.avail_out>0)
{
if ((pfile_in_zip_read_info->stream.avail_in==0) &&
(pfile_in_zip_read_info->rest_read_compressed>0))
{
uInt uReadThis = UNZ_BUFSIZE;
if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
if (uReadThis == 0)
return UNZ_EOF;
if (ZSEEK64(pfile_in_zip_read_info->z_filefunc,
pfile_in_zip_read_info->filestream,
pfile_in_zip_read_info->pos_in_zipfile +
pfile_in_zip_read_info->byte_before_the_zipfile,
ZLIB_FILEFUNC_SEEK_SET)!=0)
return UNZ_ERRNO;
if (ZREAD64(pfile_in_zip_read_info->z_filefunc,
pfile_in_zip_read_info->filestream,
pfile_in_zip_read_info->read_buffer,
uReadThis)!=uReadThis)
return UNZ_ERRNO;
# ifndef NOUNCRYPT
if(s->encrypted)
{
uInt i;
for(i=0;i<uReadThis;i++)
pfile_in_zip_read_info->read_buffer[i] =
zdecode(s->keys,s->pcrc_32_tab,
pfile_in_zip_read_info->read_buffer[i]);
}
# endif
pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
pfile_in_zip_read_info->stream.next_in =
(Bytef*)pfile_in_zip_read_info->read_buffer;
pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
}
if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw))
{
uInt uDoCopy,i ;
if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
(pfile_in_zip_read_info->rest_read_compressed == 0))
return (iRead==0) ? UNZ_EOF : (int)iRead;
if (pfile_in_zip_read_info->stream.avail_out <
pfile_in_zip_read_info->stream.avail_in)
uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
else
uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
for (i=0;i<uDoCopy;i++)
*(pfile_in_zip_read_info->stream.next_out+i) =
*(pfile_in_zip_read_info->stream.next_in+i);
pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uDoCopy;
pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
pfile_in_zip_read_info->stream.next_out,
uDoCopy);
pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
pfile_in_zip_read_info->stream.next_out += uDoCopy;
pfile_in_zip_read_info->stream.next_in += uDoCopy;
pfile_in_zip_read_info->stream.total_out += uDoCopy;
iRead += uDoCopy;
}
else if (pfile_in_zip_read_info->compression_method==Z_BZIP2ED)
{
#ifdef HAVE_BZIP2
uLong uTotalOutBefore,uTotalOutAfter;
const Bytef *bufBefore;
uLong uOutThis;
pfile_in_zip_read_info->bstream.next_in = (char*)pfile_in_zip_read_info->stream.next_in;
pfile_in_zip_read_info->bstream.avail_in = pfile_in_zip_read_info->stream.avail_in;
pfile_in_zip_read_info->bstream.total_in_lo32 = pfile_in_zip_read_info->stream.total_in;
pfile_in_zip_read_info->bstream.total_in_hi32 = 0;
pfile_in_zip_read_info->bstream.next_out = (char*)pfile_in_zip_read_info->stream.next_out;
pfile_in_zip_read_info->bstream.avail_out = pfile_in_zip_read_info->stream.avail_out;
pfile_in_zip_read_info->bstream.total_out_lo32 = pfile_in_zip_read_info->stream.total_out;
pfile_in_zip_read_info->bstream.total_out_hi32 = 0;
uTotalOutBefore = pfile_in_zip_read_info->bstream.total_out_lo32;
bufBefore = (const Bytef *)pfile_in_zip_read_info->bstream.next_out;
err=BZ2_bzDecompress(&pfile_in_zip_read_info->bstream);
uTotalOutAfter = pfile_in_zip_read_info->bstream.total_out_lo32;
uOutThis = uTotalOutAfter-uTotalOutBefore;
pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,bufBefore, (uInt)(uOutThis));
pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
pfile_in_zip_read_info->stream.next_in = (Bytef*)pfile_in_zip_read_info->bstream.next_in;
pfile_in_zip_read_info->stream.avail_in = pfile_in_zip_read_info->bstream.avail_in;
pfile_in_zip_read_info->stream.total_in = pfile_in_zip_read_info->bstream.total_in_lo32;
pfile_in_zip_read_info->stream.next_out = (Bytef*)pfile_in_zip_read_info->bstream.next_out;
pfile_in_zip_read_info->stream.avail_out = pfile_in_zip_read_info->bstream.avail_out;
pfile_in_zip_read_info->stream.total_out = pfile_in_zip_read_info->bstream.total_out_lo32;
if (err==BZ_STREAM_END)
return (iRead==0) ? UNZ_EOF : iRead;
if (err!=BZ_OK)
break;
#endif
} // end Z_BZIP2ED
else
{
ZPOS64_T uTotalOutBefore,uTotalOutAfter;
const Bytef *bufBefore;
ZPOS64_T uOutThis;
int flush=Z_SYNC_FLUSH;
uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
bufBefore = pfile_in_zip_read_info->stream.next_out;
/*
if ((pfile_in_zip_read_info->rest_read_uncompressed ==
pfile_in_zip_read_info->stream.avail_out) &&
(pfile_in_zip_read_info->rest_read_compressed == 0))
flush = Z_FINISH;
*/
err=inflate(&pfile_in_zip_read_info->stream,flush);
if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
err = Z_DATA_ERROR;
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
/* Detect overflow, because z_stream.total_out is uLong (32 bits) */
if (uTotalOutAfter<uTotalOutBefore)
uTotalOutAfter += 1LL << 32; /* Add maximum value of uLong + 1 */
uOutThis = uTotalOutAfter-uTotalOutBefore;
pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
pfile_in_zip_read_info->crc32 =
crc32(pfile_in_zip_read_info->crc32,bufBefore,
(uInt)(uOutThis));
pfile_in_zip_read_info->rest_read_uncompressed -=
uOutThis;
iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
if (err==Z_STREAM_END)
return (iRead==0) ? UNZ_EOF : (int)iRead;
if (err!=Z_OK)
break;
}
}
if (err==Z_OK)
return (int)iRead;
return err;
}