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44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
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/*
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* The authors of this software are Rob Pike and Ken Thompson.
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* Copyright (c) 2002 by Lucent Technologies.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose without fee is hereby granted, provided that this entire notice
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* is included in all copies of any software which is or includes a copy
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* or modification of this software and in all copies of the supporting
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* documentation for such software.
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
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* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
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*
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* This file and rune.cc have been converted to compile as C++ code
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* in name space re2.
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*/
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#ifndef RE2_UTIL_UTF_H__
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#define RE2_UTIL_UTF_H__
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#include <stdint.h>
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namespace re2 {
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typedef signed int Rune; /* Code-point values in Unicode 4.0 are 21 bits wide.*/
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enum
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{
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UTFmax = 4, /* maximum bytes per rune */
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Runesync = 0x80, /* cannot represent part of a UTF sequence (<) */
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Runeself = 0x80, /* rune and UTF sequences are the same (<) */
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Runeerror = 0xFFFD, /* decoding error in UTF */
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Runemax = 0x10FFFF, /* maximum rune value */
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};
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int runetochar(char* s, const Rune* r);
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int chartorune(Rune* r, const char* s);
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int fullrune(const char* s, int n);
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int utflen(const char* s);
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char* utfrune(const char*, Rune);
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} // namespace re2
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#endif // RE2_UTIL_UTF_H__
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