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/***
*memchr.c - search block of memory for a given character
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines memchr() - search memory until a character is
* found or a limit is reached.
*
*Revision History:
* 05-31-89 JCR C version created.
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright.
* 08-14-90 SBM Compiles cleanly with -W3, removed now redundant
* #include <stddef.h>
* 10-01-90 GJF New-style function declarator. Also, rewrote expr. to
* avoid using cast as an lvalue.
* 04-26-91 SRW Removed level 3 warnings
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
/***
*char *memchr(buf, chr, cnt) - search memory for given character.
*
*Purpose:
* Searches at buf for the given character, stopping when chr is
* first found or cnt bytes have been searched through.
*
*Entry:
* void *buf - memory buffer to be searched
* int chr - character to search for
* size_t cnt - max number of bytes to search
*
*Exit:
* returns pointer to first occurence of chr in buf
* returns NULL if chr not found in the first cnt bytes
*
*Exceptions:
*
*******************************************************************************/
void * _CALLTYPE1 memchr (
const void * buf,
int chr,
size_t cnt
)
{
while ( cnt && *(char *)buf != (char)chr ) {
buf = (char *)buf + 1;
cnt--;
}
return(cnt ? (void *)buf : NULL);
}
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