kc3-lang/libpng/contrib/conftest/nocompile-limits.dfa

Branch - branch -libpng16libpng17

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• Hash : 812c34c1
  Author :
  Date : 2025-01-31T09:46:21
  

  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>
  

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• contrib/conftest/nocompile-limits.dfa

• # 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 and without run-time settable limits.  Turning
  # USER_LIMITS off reduces libpng code size by allowing compile-time elimination
  # of some checking code.
  #
  option USER_LIMITS off
  
  @# 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
  

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