62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
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/***
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*memccpy.c - copy bytes until a character is found
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _memccpy() - copies bytes until a specifed character
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* is found, or a maximum number of characters have been copied.
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*
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*Revision History:
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* 05-31-89 JCR C version created.
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* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
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* copyright. Also, fixed compiler warning.
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* 08-14-90 SBM Compiles cleanly with -W3, removed now redundant
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* #include <stddef.h>
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* 10-01-90 GJF New-style function declarator. Also, rewrote expr. to
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* avoid using cast as an lvalue.
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* 01-17-91 GJF ANSI naming.
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* 09-01-93 GJF Replaced _CALLTYPE1 with __cdecl.
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* 10-27-99 PML Win64 fix: unsigned int -> size_t
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <string.h>
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/***
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*char *_memccpy(dest, src, c, count) - copy bytes until character found
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*
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*Purpose:
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* Copies bytes from src to dest until count bytes have been
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* copied, or up to and including the character c, whichever
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* comes first.
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*
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*Entry:
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* void *dest - pointer to memory to receive copy
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* void *src - source of bytes
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* int c - character to stop copy at
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* size_t count - max number of bytes to copy
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*
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*Exit:
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* returns pointer to byte immediately after c in dest
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* returns NULL if c was never found
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*
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*Exceptions:
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*
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*******************************************************************************/
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void * __cdecl _memccpy (
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void * dest,
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const void * src,
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int c,
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size_t count
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)
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{
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while ( count && (*((char *)(dest = (char *)dest + 1) - 1) =
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*((char *)(src = (char *)src + 1) - 1)) != (char)c )
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count--;
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return(count ? dest : NULL);
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}
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