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[libpng16] Removed need for -Wno-cast-align with clang. clang correctly warns

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on alignment increasing pointer casts when -Wcast-align is passed. This
fixes the cases clang warns about either (pngread.c) by eliminating the
casts from png_bytep to png_uint_16p or, for pngrutil.c where the cast
is previously verified or pngstest.c where it is OK by introducing new
png_aligncast macros to do the cast in a way that clang accepts.
This commit is contained in:
John Bowler
2012-04-30 06:31:54 -05:00
committed by Glenn Randers-Pehrson
parent 040575c80b
commit b45416921b
8 changed files with 80 additions and 44 deletions
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6
pngpriv.h
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@@ -312,9 +312,15 @@ typedef const png_uint_16p * png_const_uint_16pp;
#ifdef __cplusplus
# define png_voidcast(type, value) static_cast<type>(value)
# define png_constcast(type, value) const_cast<type>(value)
# define png_aligncast(type, value) \
static_cast<type>(static_cast<void*>(value))
# define png_aligncastconst(type, value) \
static_cast<type>(static_cast<const void*>(value))
#else
# define png_voidcast(type, value) (value)
# define png_constcast(type, value) ((type)(value))
# define png_aligncast(type, value) ((void*)(value))
# define png_aligncastconst(type, value) ((const void*)(value))
#endif /* __cplusplus */
/* Some fixed point APIs are still required even if not exported because