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[devel] Apply png_user_chunk_cache_max within png_decompress_chunk()

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and merged libpng-1.2.41.txt with libpng-1.4.0.txt where appropriate.
This commit is contained in:
Glenn Randers-Pehrson
2009-10-31 19:37:05 -05:00
parent 8fe28948ca
commit ef29a5e827
7 changed files with 51 additions and 17 deletions
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22
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.4.0 [October 30, 2009]
* Last changed in libpng 1.4.0 [November 1, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -286,9 +286,23 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
png_charp tmp;
tmp = text;
text = (png_charp)png_malloc_warn(png_ptr,
(png_size_t)(text_size +
png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
if ((png_ptr->user_chunk_cache_max != 0) &&
(--png_ptr->user_chunk_cache_max == 0))
{
png_warning(png_ptr, "No space in chunk cache");
text = NULL;
}
else
{
#endif
text = (png_charp)png_malloc_warn(png_ptr,
(png_size_t)(text_size +
png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1));
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
}
#endif
if (text == NULL)
{
png_free(png_ptr, tmp);