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Added a helpful comment to the va_copy() Windows hack.

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Dana Robinson 2018-12-17 10:34:20 -08:00
parent 1b9326d37f
commit 6306766fb4
1 changed files with 4 additions and 0 deletions
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4
src/H5win32defs.h
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@ -67,6 +67,10 @@ typedef __int64 h5_stat_size_t;
#define HDunlink(S) _unlink(S)
#define HDwrite(F,M,Z) _write(F,M,Z)
#if (_MSC_VER < 1800)
/* va_copy() does not exist on pre-2013 Visual Studio. Since va_lists are
* just pointers into the stack in those CRTs, the usual work-around
* is to just define the operation as a pointer copy.
*/
#define HDva_copy(D,S) ((D) = (S))
#endif /* MSC_VER < 1800 */