107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/***
|
|
*mbsnbcpy.c - Copy one string to another, n bytes only (MBCS)
|
|
*
|
|
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* Copy one string to another, n bytes only (MBCS)
|
|
*
|
|
*Revision History:
|
|
* 05-19-93 KRS Created from mbsncpy.
|
|
* 08-03-93 KRS Fix logic bug.
|
|
* 10-05-93 GJF Replaced _CRTAPI1 with __cdecl.
|
|
* 04-15-93 CFW Add _MB_CP_LOCK.
|
|
* 05-09-94 CFW Optimize for SBCS.
|
|
* 05-19-94 CFW Enable non-Win32.
|
|
* 09-11-97 GJF Replaced __mbcodepage == 0 with _ISNOTMBCP.
|
|
* 04-13-98 GJF Revised multithread support based on threadmbcinfo
|
|
* structs
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#ifdef _MBCS
|
|
|
|
#include <mtdll.h>
|
|
#include <cruntime.h>
|
|
#include <string.h>
|
|
#include <mbdata.h>
|
|
#include <mbctype.h>
|
|
#include <mbstring.h>
|
|
|
|
/***
|
|
* _mbsnbcpy - Copy one string to another, n bytes only (MBCS)
|
|
*
|
|
*Purpose:
|
|
* Copies exactly cnt bytes from src to dst. If strlen(src) < cnt, the
|
|
* remaining character are padded with null bytes. If strlen >= cnt, no
|
|
* terminating null byte is added. 2-byte MBCS characters are handled
|
|
* correctly.
|
|
*
|
|
*Entry:
|
|
* unsigned char *dst = destination for copy
|
|
* unsigned char *src = source for copy
|
|
* int cnt = number of characters to copy
|
|
*
|
|
*Exit:
|
|
* returns dst = destination of copy
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
unsigned char * __cdecl _mbsnbcpy(
|
|
unsigned char *dst,
|
|
const unsigned char *src,
|
|
size_t cnt
|
|
)
|
|
{
|
|
|
|
unsigned char *start = dst;
|
|
#ifdef _MT
|
|
pthreadmbcinfo ptmbci = _getptd()->ptmbcinfo;
|
|
|
|
if ( ptmbci != __ptmbcinfo )
|
|
ptmbci = __updatetmbcinfo();
|
|
|
|
if ( _ISNOTMBCP_MT(ptmbci) )
|
|
#else
|
|
if ( _ISNOTMBCP )
|
|
#endif
|
|
return strncpy(dst, src, cnt);
|
|
|
|
while (cnt) {
|
|
|
|
cnt--;
|
|
#ifdef _MT
|
|
if ( __ismbblead_mt(ptmbci, *src) ) {
|
|
#else
|
|
if ( _ismbblead(*src) ) {
|
|
#endif
|
|
*dst++ = *src++;
|
|
if (!cnt) {
|
|
dst[-1] = '\0';
|
|
break;
|
|
}
|
|
cnt--;
|
|
if ((*dst++ = *src++) == '\0') {
|
|
dst[-2] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
|
|
else
|
|
if ((*dst++ = *src++) == '\0')
|
|
break;
|
|
|
|
}
|
|
|
|
/* pad with nulls as needed */
|
|
|
|
while (cnt--)
|
|
*dst++ = '\0';
|
|
|
|
return start;
|
|
}
|
|
|
|
#endif /* _MBCS */
|