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[libpng15] Fixed FP division by zero in pngvalid.c; the 'test_pixel' code left

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the sBIT fields in the test pixel as 0, which resulted in a floating
point division by zero which was irrelevant but causes systems where
FP exceptions cause a crash. Added code to pngvalid to turn on FP
exceptions if the appropriate glibc support is there to ensure this is
tested in the future.
This commit is contained in:
John Bowler
2011-11-04 20:24:56 -05:00
committed by Glenn Randers-Pehrson
parent 88bcdc269b
commit a004e23a4c
4 changed files with 135 additions and 8 deletions
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10
png.h
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@@ -1,7 +1,7 @@
/* png.h - header file for PNG reference library
*
* libpng version 1.5.7beta02 - November 4, 2011
* libpng version 1.5.7beta02 - November 5, 2011
* Copyright (c) 1998-2011 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.)
@@ -11,7 +11,7 @@
* Authors and maintainers:
* 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 0.97, January 1998, through 1.5.7beta02 - November 4, 2011: Glenn
* libpng versions 0.97, January 1998, through 1.5.7beta02 - November 5, 2011: Glenn
* See also "Contributing Authors", below.
*
* Note about libpng version numbers:
@@ -195,7 +195,7 @@
*
* This code is released under the libpng license.
*
* libpng versions 1.2.6, August 15, 2004, through 1.5.7beta02, November 4, 2011, are
* libpng versions 1.2.6, August 15, 2004, through 1.5.7beta02, November 5, 2011, are
* Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
* distributed according to the same disclaimer and license as libpng-1.2.5
* with the following individual added to the list of Contributing Authors:
@@ -307,7 +307,7 @@
* Y2K compliance in libpng:
* =========================
*
* November 4, 2011
* November 5, 2011
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
@@ -370,7 +370,7 @@
/* Version information for png.h - this should match the version in png.c */
#define PNG_LIBPNG_VER_STRING "1.5.7beta02"
#define PNG_HEADER_VERSION_STRING \
" libpng version 1.5.7beta02 - November 4, 2011\n"
" libpng version 1.5.7beta02 - November 5, 2011\n"
#define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15