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[devel] Comment about 1.4.0 through 1.4.4 versions of png_get_uint_16 macro

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which returned the wrong type (png_uint_32 instead of png_uint_16).
This commit is contained in:
Glenn Randers-Pehrson 2010-11-25 06:56:20 -06:00
parent 2776d5e9e6
commit b93e0326d2
1 changed files with 10 additions and 5 deletions
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15
png.h
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@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library /* png.h - header file for PNG reference library
* *
* libpng version 1.5.0beta56 - November 21, 2010 * libpng version 1.5.0beta56 - November 25, 2010
* Copyright (c) 1998-2010 Glenn Randers-Pehrson * Copyright (c) 1998-2010 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -11,7 +11,7 @@
* Authors and maintainers: * Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
* libpng versions 0.97, January 1998, through 1.5.0beta56 - November 21, 2010: Glenn * libpng versions 0.97, January 1998, through 1.5.0beta56 - November 25, 2010: Glenn
* See also "Contributing Authors", below. * See also "Contributing Authors", below.
* *
* Note about libpng version numbers: * Note about libpng version numbers:
@ -173,7 +173,7 @@
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* *
* libpng versions 1.2.6, August 15, 2004, through 1.5.0beta56, November 21, 2010, are * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta56, November 25, 2010, are
* Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5 * distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors: * with the following individual added to the list of Contributing Authors:
@ -285,7 +285,7 @@
* Y2K compliance in libpng: * Y2K compliance in libpng:
* ========================= * =========================
* *
* November 21, 2010 * November 25, 2010
* *
* Since the PNG Development group is an ad-hoc body, we can't make * Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration. * an official declaration.
@ -349,7 +349,7 @@
/* Version information for png.h - this should match the version in png.c */ /* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.5.0beta56" #define PNG_LIBPNG_VER_STRING "1.5.0beta56"
#define PNG_HEADER_VERSION_STRING \ #define PNG_HEADER_VERSION_STRING \
" libpng version 1.5.0beta56 - November 21, 2010\n" " libpng version 1.5.0beta56 - November 25, 2010\n"
#define PNG_LIBPNG_VER_SONUM 15 #define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15 #define PNG_LIBPNG_VER_DLLNUM 15
@ -2044,10 +2044,15 @@ PNG_EXPORT(png_const_bytep,png_get_io_chunk_name,(png_structp png_ptr),,200);
((png_uint_32)(*((buf) + 1)) << 16) + \ ((png_uint_32)(*((buf) + 1)) << 16) + \
((png_uint_32)(*((buf) + 2)) << 8) + \ ((png_uint_32)(*((buf) + 2)) << 8) + \
((png_uint_32)(*((buf) + 3)))) ((png_uint_32)(*((buf) + 3))))
/* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
* function) incorrectly returned a value of type png_uint_32.
*/
# define png_get_uint_16(buf) \ # define png_get_uint_16(buf) \
((png_uint_16) \ ((png_uint_16) \
(((unsigned int)(*(buf)) << 8) + \ (((unsigned int)(*(buf)) << 8) + \
((unsigned int)(*((buf) + 1))))) ((unsigned int)(*((buf) + 1)))))
# define png_get_int_32(buf) \ # define png_get_int_32(buf) \
((png_int_32)((*(buf) & 0x80) \ ((png_int_32)((*(buf) & 0x80) \
? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \