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/***
*memccpy.c - copy bytes until a character is found
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _memccpy() - copies bytes until a specifed character
* is found, or a maximum number of characters have been copied.
*
*Revision History:
* 05-31-89 JCR C version created.
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright. Also, fixed compiler warning.
* 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.
* 01-17-91 GJF ANSI naming.
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
/***
*char *_memccpy(dest, src, c, count) - copy bytes until character found
*
*Purpose:
* Copies bytes from src to dest until count bytes have been
* copied, or up to and including the character c, whichever
* comes first.
*
*Entry:
* void *dest - pointer to memory to receive copy
* void *src - source of bytes
* int c - character to stop copy at
* unsigned int count - max number of bytes to copy
*
*Exit:
* returns pointer to byte immediately after c in dest
* returns NULL if c was never found
*
*Exceptions:
*
*******************************************************************************/
void * _CALLTYPE1 _memccpy (
void * dest,
const void * src,
int c,
unsigned count
)
{
while ( count && (*((char *)(dest = (char *)dest + 1) - 1) =
*((char *)(src = (char *)src + 1) - 1)) != (char)c )
count--;
return(count ? dest : NULL);
}
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