libpng/contrib/conftest/nolimits.dfa
John Bowler 812c34c13c test: add limit configuration tests
nocompile-limits.dfa: turns off all limits including run-time limits

nolimits.dfa: makes the compile time limits unlimited while leaving on
    the run-time limits.

Fixes compiler warnings exposed by these tests. These are just warnings,
there were no bugs other than a failure to handle systems with a 16-bit
at the appropriate time which would result in a later failure on malloc.

png.c: png_icc_check_length: in-line code was still used in place of
    png_chunk_max when checking the current chunk allocation limit.  The
    in-line code did not handle PNG_MAXSEG_64K and, anyway, issued
    compiler warnings in the 'nocompile-limits' case.  Changed to use
    png_malloc_max.

pngrutil.c: eliminated an erroneous 'truncation' warning with GCC-14 by
    using a safe cast.

pngtest.c: failed to check for PNG_USER_LIMITS_SUPPORTED around API
    calls which don't exist without PNG_USER_LIMITS.

Signed-off-by: John Bowler <jbowler@acm.org>
2025-01-31 09:46:21 -08:00

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# nolimits.dfa
# Build time configuration of libpng
#
# Author: John Bowler
# Copyright: (c) John Bowler, 2025
#
# Usage rights:
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work. This work is published from:
# United States.
#
# Build libpng without any limits. With these settigs run-time limits are still
# possible.
#
@# define PNG_USER_WIDTH_MAX PNG_UINT_31_MAX
@# define PNG_USER_HEIGHT_MAX PNG_UINT_31_MAX
@# define PNG_USER_CHUNK_CACHE_MAX 0
@# define PNG_USER_CHUNK_MALLOC_MAX 0