1234567891011121314151617181920212223242526272829303132333435363738394041424344 |
- /*
- * The authors of this software are Rob Pike and Ken Thompson.
- * Copyright (c) 2002 by Lucent Technologies.
- * Permission to use, copy, modify, and distribute this software for any
- * purpose without fee is hereby granted, provided that this entire notice
- * is included in all copies of any software which is or includes a copy
- * or modification of this software and in all copies of the supporting
- * documentation for such software.
- * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
- * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
- * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
- */
- #include <stdarg.h>
- #include <string.h>
- #include "utf.h"
- #include "utfdef.h"
- char*
- utfrune(char *s, long c)
- {
- long c1;
- Rune r;
- int n;
- if(c < Runesync) /* not part of utf sequence */
- return strchr(s, c);
- for(;;) {
- c1 = *(uchar*)s;
- if(c1 < Runeself) { /* one byte rune */
- if(c1 == 0)
- return 0;
- if(c1 == c)
- return s;
- s++;
- continue;
- }
- n = chartorune(&r, s);
- if(r == c)
- return s;
- s += n;
- }
- }
|