strend.c
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上传日期:2007-04-14
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- /* File : strend.c
- Author : Richard A. O'Keefe.
- Updated: 23 April 1984
- Defines: strend()
- strend(s) returns a character pointer to the NUL which ends s. That
- is, strend(s)-s == strlen(s). This is useful for adding things at
- the end of strings. It is redundant, because strchr(s,'') could
- be used instead, but this is clearer and faster.
- Beware: the asm version works only if strlen(s) < 65535.
- */
- #include <global.h>
- #include "m_string.h"
- #if VaxAsm
- char *strend(s)
- const char *s;
- {
- asm("locc $0,$65535,*4(ap)");
- asm("movl r1,r0");
- }
- #else /* ~VaxAsm */
- char *strend(register const char *s)
- {
- while (*s++);
- return (char*) (s-1);
- }
- #endif /* VaxAsm */