strmov.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /*
- strmov(dst, src) moves all the characters of src (including the
- closing NUL) to dst, and returns a pointer to the new closing NUL in
- dst. The similar UNIX routine strcpy returns the old value of dst,
- which I have never found useful. strmov(strmov(dst,a),b) moves a//b
- into dst, which seems useful.
- */
- #include <my_global.h>
- #include "m_string.h"
- #ifdef BAD_STRING_COMPILER
- #undef strmov
- #define strmov strmov_overlapp
- #endif
- #ifndef strmov
- #if !defined(MC68000) && !defined(DS90)
- char *strmov(register char *dst, register const char *src)
- {
- while ((*dst++ = *src++)) ;
- return dst-1;
- }
- #else
- char *strmov(dst, src)
- char *dst, *src;
- {
- asm(" movl 4(a7),a1 ");
- asm(" movl 8(a7),a0 ");
- asm(".L4: movb (a0)+,(a1)+ ");
- asm(" jne .L4 ");
- asm(" movl a1,d0 ");
- asm(" subql #1,d0 ");
- }
- #endif
- #endif /* strmov */