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38 lines
976 B
C
38 lines
976 B
C
/* MEMRCHR.C (c) Copyright Roger Bowler, 2006-2012 */
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/* Hercules Right to Left memory scan */
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/* */
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/* Released under "The Q Public License Version 1" */
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/* (http://www.hercules-390.org/herclic.html) as modifications to */
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/* Hercules. */
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#include "hstdinc.h"
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#define _MEMRCHR_C_
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#define _HUTIL_DLL_
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#include "hercules.h"
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#if !defined( HAVE_MEMRCHR )
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#include "memrchr.h"
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DLL_EXPORT void *memrchr(const void *buf, int c, size_t num)
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{
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unsigned char *pMem;
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if (num == 0)
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{
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return NULL;
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}
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for (pMem = (unsigned char *) buf + num - 1; pMem >= (unsigned char *) buf; pMem--)
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{
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if (*pMem == (unsigned char) c) break;
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}
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if (pMem >= (unsigned char *) buf)
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{
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return ((void *) pMem);
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}
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return NULL;
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}
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#endif // !defined(HAVE_MEMRCHR)
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