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[devel] Changed PNG_UNUSED from "param=param;" to "{if(param){}}".

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Glenn Randers-Pehrson
2011-01-27 13:23:08 -06:00
parent 0e15da5b94
commit 4e2e14addf
3 changed files with 17 additions and 8 deletions
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21
pngpriv.h
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@@ -89,13 +89,22 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
* the terminating semicolon.
*/
#ifndef PNG_UNUSED
# define PNG_UNUSED(param) {(void)param;}
# define PNG_UNUSED(param) {if(param){}}
/* Other possiblities being discussed on png-mng-implement, Jan 2011 */
/* # define PNG_UNUSED(param) param = param; */
/* # define PNG_UNUSED(param) if(param); */ /* gcc-4.2 warns about this one */
/* # define PNG_UNUSED(param) if(param){} */
/* # define PNG_UNUSED(param) {if(param){}} */
/* # define PNG_UNUSED(param) ((void)(param ? 0 : 0)); */
/* #define PNG_UNUSED(param) param = param; */ /* What we used before */
/* #define PNG_UNUSED(param) {(void)param;} */ /* Visual C complains */
/* #define PNG_UNUSED(param) if(param); */ /* gcc-4.2 complains */
/* #define PNG_UNUSED(param) if(param){} */
/* #define PNG_UNUSED(param) ((void)(param ? 0 : 0)); */ /* 0:0 might be seen */
/* #define PNG_UNUSED(param) {if(&param){}} */ /* gcc-4 complains */
/* #define PNG_UNUSED(param) {if(&param-&param){}} */ /* No comment. */
/*
* #if defined(__GNUC__) || defined(_MSC_VER)
* # define UNUSED(param) (void)param;
* #else
* # define UNUSED(param)
* #endif
*/
#endif
/* Just a little check that someone hasn't tried to define something