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Diffstat (limited to 'plugins/AdvaImg/src/FreeImage/ZLibInterface.cpp')
| -rw-r--r-- | plugins/AdvaImg/src/FreeImage/ZLibInterface.cpp | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/plugins/AdvaImg/src/FreeImage/ZLibInterface.cpp b/plugins/AdvaImg/src/FreeImage/ZLibInterface.cpp deleted file mode 100644 index 39c7ac0ecc..0000000000 --- a/plugins/AdvaImg/src/FreeImage/ZLibInterface.cpp +++ /dev/null @@ -1,223 +0,0 @@ -// ========================================================== -// ZLib library interface -// -// Design and implementation by -// - Floris van den Berg (flvdberg@wxs.nl) -// -// This file is part of FreeImage 3 -// -// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY -// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES -// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE -// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED -// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT -// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY -// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL -// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER -// THIS DISCLAIMER. -// -// Use at your own risk! -// ========================================================== - -#include "zlib.h" -#include "FreeImage.h" -#include "Utilities.h" -#include "zutil.h" /* must be the last header because of error C3163 in VS2008 (_vsnprintf defined in stdio.h) */ - -/** -Compresses a source buffer into a target buffer, using the ZLib library. -Upon entry, target_size is the total size of the destination buffer, -which must be at least 0.1% larger than source_size plus 12 bytes. - -@param target Destination buffer -@param target_size Size of the destination buffer, in bytes -@param source Source buffer -@param source_size Size of the source buffer, in bytes -@return Returns the actual size of the compressed buffer, returns 0 if an error occured -@see FreeImage_ZLibUncompress -*/ -DWORD DLL_CALLCONV -FreeImage_ZLibCompress(BYTE *target, DWORD target_size, BYTE *source, DWORD source_size) { - uLongf dest_len = (uLongf)target_size; - - int zerr = compress(target, &dest_len, source, source_size); - switch(zerr) { - case Z_MEM_ERROR: // not enough memory - case Z_BUF_ERROR: // not enough room in the output buffer - FreeImage_OutputMessageProc(FIF_UNKNOWN, "Zlib error : %s", zError(zerr)); - return 0; - case Z_OK: - return dest_len; - } - - return 0; -} - -/** -Decompresses a source buffer into a target buffer, using the ZLib library. -Upon entry, target_size is the total size of the destination buffer, -which must be large enough to hold the entire uncompressed data. -The size of the uncompressed data must have been saved previously by the compressor -and transmitted to the decompressor by some mechanism outside the scope of this -compression library. - -@param target Destination buffer -@param target_size Size of the destination buffer, in bytes -@param source Source buffer -@param source_size Size of the source buffer, in bytes -@return Returns the actual size of the uncompressed buffer, returns 0 if an error occured -@see FreeImage_ZLibCompress -*/ -DWORD DLL_CALLCONV -FreeImage_ZLibUncompress(BYTE *target, DWORD target_size, BYTE *source, DWORD source_size) { - uLongf dest_len = (uLongf)target_size; - - int zerr = uncompress(target, &dest_len, source, source_size); - switch(zerr) { - case Z_MEM_ERROR: // not enough memory - case Z_BUF_ERROR: // not enough room in the output buffer - case Z_DATA_ERROR: // input data was corrupted - FreeImage_OutputMessageProc(FIF_UNKNOWN, "Zlib error : %s", zError(zerr)); - return 0; - case Z_OK: - return dest_len; - } - - return 0; -} - -/** -Compresses a source buffer into a target buffer, using the ZLib library. -On success, the target buffer contains a GZIP compatible layout. -Upon entry, target_size is the total size of the destination buffer, -which must be at least 0.1% larger than source_size plus 24 bytes. - -@param target Destination buffer -@param target_size Size of the destination buffer, in bytes -@param source Source buffer -@param source_size Size of the source buffer, in bytes -@return Returns the actual size of the compressed buffer, returns 0 if an error occured -@see FreeImage_ZLibCompress -*/ -DWORD DLL_CALLCONV -FreeImage_ZLibGZip(BYTE *target, DWORD target_size, BYTE *source, DWORD source_size) { - uLongf dest_len = (uLongf)target_size - 12; - DWORD crc = crc32(0L, NULL, 0); - - // set up header (stolen from zlib/gzio.c) - sprintf((char *)target, "%c%c%c%c%c%c%c%c", 0x1f, 0x8b, - Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/); - int zerr = compress2(target + 8, &dest_len, source, source_size, Z_BEST_COMPRESSION); - switch(zerr) { - case Z_MEM_ERROR: // not enough memory - case Z_BUF_ERROR: // not enough room in the output buffer - FreeImage_OutputMessageProc(FIF_UNKNOWN, "Zlib error : %s", zError(zerr)); - return 0; - case Z_OK: { - // patch header, setup crc and length (stolen from mod_trace_output) - BYTE *p = target + 8; *p++ = 2; *p = OS_CODE; // xflags, os_code - crc = crc32(crc, source, source_size); - memcpy(target + 4 + dest_len, &crc, 4); - memcpy(target + 8 + dest_len, &source_size, 4); - return dest_len + 12; - } - } - return 0; -} - -/** -Decompresses a gzipped source buffer into a target buffer, using the ZLib library. -Upon entry, target_size is the total size of the destination buffer, -which must be large enough to hold the entire uncompressed data. -The size of the uncompressed data must have been saved previously by the compressor -and transmitted to the decompressor by some mechanism outside the scope of this -compression library. - -@param target Destination buffer -@param target_size Size of the destination buffer, in bytes -@param source Source buffer -@param source_size Size of the source buffer, in bytes -@return Returns the actual size of the uncompressed buffer, returns 0 if an error occured -@see FreeImage_ZLibGZip -*/ - -static int get_byte(z_stream *stream) { - if (stream->avail_in <= 0) return EOF; - stream->avail_in--; - return *(stream->next_in)++; -} - -static int checkheader(z_stream *stream) { - int flags, c; - DWORD len; - - if (get_byte(stream) != 0x1f || get_byte(stream) != 0x8b) - return Z_DATA_ERROR; - if (get_byte(stream) != Z_DEFLATED || ((flags = get_byte(stream)) & 0xE0) != 0) - return Z_DATA_ERROR; - for (len = 0; len < 6; len++) (void)get_byte(stream); - - if ((flags & 0x04) != 0) { /* skip the extra field */ - len = (DWORD)get_byte(stream); - len += ((DWORD)get_byte(stream)) << 8; - /* len is garbage if EOF but the loop below will quit anyway */ - while (len-- != 0 && get_byte(stream) != EOF) ; - } - if ((flags & 0x08) != 0) { /* skip the original file name */ - while ((c = get_byte(stream)) != 0 && c != EOF) ; - } - if ((flags & 0x10) != 0) { /* skip the .gz file comment */ - while ((c = get_byte(stream)) != 0 && c != EOF) ; - } - if ((flags & 0x02) != 0) { /* skip the header crc */ - for (len = 0; len < 2; len++) (void)get_byte(stream); - } - return Z_OK; -} - -DWORD DLL_CALLCONV -FreeImage_ZLibGUnzip(BYTE *target, DWORD target_size, BYTE *source, DWORD source_size) { - DWORD src_len = source_size; - DWORD dest_len = target_size; - int zerr = Z_DATA_ERROR; - - if (src_len > 0) { - z_stream stream; - memset(&stream, 0, sizeof (stream)); - if ((zerr = inflateInit2(&stream, -MAX_WBITS)) == Z_OK) { - stream.next_in = source; - stream.avail_in = source_size; - - stream.next_out = target; - stream.avail_out = target_size; - - if ((zerr = checkheader(&stream)) == Z_OK) { - zerr = inflate (&stream, Z_NO_FLUSH); - dest_len = target_size - stream.avail_out; - - if (zerr == Z_OK || zerr == Z_STREAM_END) - inflateEnd(&stream); - } - } - } - if (zerr != Z_OK && zerr != Z_STREAM_END) { - FreeImage_OutputMessageProc(FIF_UNKNOWN, "Zlib error : %s", zError(zerr)); - return 0; - } - return dest_len; -} - -/** -Update a running crc from source and return the updated crc, using the ZLib library. -If source is NULL, this function returns the required initial value for the crc. - -@param crc Running crc value -@param source Source buffer -@param source_size Size of the source buffer, in bytes -@return Returns the new crc value -*/ -DWORD DLL_CALLCONV -FreeImage_ZLibCRC32(DWORD crc, BYTE *source, DWORD source_size) { - - return crc32(crc, source, source_size); -} |