| /* | |
| * 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" | |
| /* const - removed for go code */ | |
| char* | |
| utfrrune(const char *s, Rune c) | |
| { | |
| long c1; | |
| Rune r; | |
| const char *s1; | |
| if(c < Runesync) /* not part of utf sequence */ | |
| return strrchr(s, c); | |
| s1 = 0; | |
| for(;;) { | |
| c1 = *(uchar*)s; | |
| if(c1 < Runeself) { /* one byte rune */ | |
| if(c1 == 0) | |
| return (char*)s1; | |
| if(c1 == c) | |
| s1 = s; | |
| s++; | |
| continue; | |
| } | |
| c1 = chartorune(&r, s); | |
| if(r == c) | |
| s1 = s; | |
| s += c1; | |
| } | |
| return 0; | |
| } |