mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.9 KiB
61 lines
1.9 KiB
/***
|
|
*memccpy.c - copy bytes until a character is found
|
|
*
|
|
* Copyright (c) 1985-2001, 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.
|
|
* 09-01-93 GJF Replaced _CALLTYPE1 with __cdecl.
|
|
* 10-27-99 PML Win64 fix: unsigned int -> size_t
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#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
|
|
* size_t 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 * __cdecl _memccpy (
|
|
void * dest,
|
|
const void * src,
|
|
int c,
|
|
size_t count
|
|
)
|
|
{
|
|
while ( count && (*((char *)(dest = (char *)dest + 1) - 1) =
|
|
*((char *)(src = (char *)src + 1) - 1)) != (char)c )
|
|
count--;
|
|
|
|
return(count ? dest : NULL);
|
|
}
|