strmov.c
上传用户:jmzj888
上传日期:2007-01-02
资源大小:220k
文件大小:1k
- /*
- 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 <global.h>
- #include "m_string.h"
- #ifdef BAD_STRING_COMPILER
- #undef strmov
- #define strmov strmov_overlapp
- #endif
- #if !defined(MC68000) && !defined(DS90)
- char *strmov(dst, src)
- 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