huwcampbell.com
Reactos
1/***
2*memccpy.c - copy bytes until a character is found
3*
4* Copyright (c) Microsoft Corporation. All rights reserved.
5*
6*Purpose:
7* defines _memccpy() - copies bytes until a specifed character
8* is found, or a maximum number of characters have been copied.
9*
10*******************************************************************************/
11
12#include <string.h>
13
14/***
15*char *_memccpy(dest, src, c, count) - copy bytes until character found
16*
17*Purpose:
18* Copies bytes from src to dest until count bytes have been
19* copied, or up to and including the character c, whichever
20* comes first.
21*
22*Entry:
23* void *dest - pointer to memory to receive copy
24* void *src - source of bytes
25* int c - character to stop copy at
26* size_t count - max number of bytes to copy
27*
28*Exit:
29* returns pointer to byte immediately after c in dest
30* returns NULL if c was never found
31*
32*Exceptions:
33*
34*******************************************************************************/
35
36void * __cdecl _memccpy (
37 void * dest,
38 const void * src,
39 int c,
40 size_t count
41 )
42{
43 while ( count && (*((char *)(dest = (char *)dest + 1) - 1) =
44 *((char *)(src = (char *)src + 1) - 1)) != (char)c )
45 count--;
46
47 return(count ? dest : NULL);
48}