| /* |
| * 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. |
| * |
| * This file and rune.cc have been converted to compile as C++ code |
| * in name space re2. |
| */ |
| |
| #ifndef UTIL_UTF_H_ |
| #define UTIL_UTF_H_ |
| |
| #include <stdint.h> |
| |
| namespace re2 { |
| |
| typedef signed int Rune; /* Code-point values in Unicode 4.0 are 21 bits wide.*/ |
| |
| enum |
| { |
| UTFmax = 4, /* maximum bytes per rune */ |
| Runesync = 0x80, /* cannot represent part of a UTF sequence (<) */ |
| Runeself = 0x80, /* rune and UTF sequences are the same (<) */ |
| Runeerror = 0xFFFD, /* decoding error in UTF */ |
| Runemax = 0x10FFFF, /* maximum rune value */ |
| }; |
| |
| int runetochar(char* s, const Rune* r); |
| int chartorune(Rune* r, const char* s); |
| int fullrune(const char* s, int n); |
| int utflen(const char* s); |
| char* utfrune(const char*, Rune); |
| |
| } // namespace re2 |
| |
| #endif // UTIL_UTF_H_ |