2/* $NetBSD: citrus_utf8.c,v 1.17 2008/06/14 16:01:08 tnozaki Exp $ */ 3 4/*- 5 * Copyright (c)2002 Citrus Project, 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/*- 31 * Copyright (c) 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * This code is derived from software contributed to Berkeley by 35 * Paul Borman at Krystal Technologies. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62#include <sys/cdefs.h> 63#include <sys/types.h> 64 65#include <assert.h> 66#include <errno.h> 67#include <limits.h> 68#include <stdbool.h> 69#include <stddef.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <string.h> 73#include <wchar.h> 74 75#include "citrus_namespace.h" 76#include "citrus_types.h" 77#include "citrus_module.h" 78#include "citrus_stdenc.h" 79#include "citrus_utf8.h" 80 81 82/* ---------------------------------------------------------------------- 83 * private stuffs used by templates 84 */ 85 86static uint8_t _UTF8_count_array[256] = { 87 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F */ 88 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */ 89 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 - 2F */ 90 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 - 3F */ 91 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 - 4F */ 92 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 - 5F */ 93 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 - 6F */ 94 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 - 7F */ 95 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */ 96 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */ 97 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */ 98 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */ 99 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* C0 - CF */ 100 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* D0 - DF */ 101 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* E0 - EF */ 102 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0 /* F0 - FF */ 103}; 104 105static uint8_t const *_UTF8_count = _UTF8_count_array; 106 107static const uint32_t _UTF8_range[] = { 108 0, /*dummy*/ 109 0x00000000, 0x00000080, 0x00000800, 0x00010000, 110 0x00200000, 0x04000000, 0x80000000, 111}; 112 113typedef struct { 114 int chlen; 115 char ch[6]; 116} _UTF8State; 117 118typedef void *_UTF8EncodingInfo; 119 120#define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 121#define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_ 122 123#define _FUNCNAME(m) _citrus_UTF8_##m 124#define _ENCODING_INFO _UTF8EncodingInfo 125#define _ENCODING_STATE _UTF8State 126#define _ENCODING_MB_CUR_MAX(_ei_) 6 127#define _ENCODING_IS_STATE_DEPENDENT 0 128#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 129 130static size_t 131_UTF8_findlen(wchar_t v) 132{ 133 size_t i; 134 uint32_t c; 135 136 c = (uint32_t)v; /*XXX*/ 137 for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; i++) 138 if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1]) 139 return (i); 140 141 return (-1); /*out of range*/ 142} 143 144static __inline bool 145_UTF8_surrogate(wchar_t wc) 146{ 147 148 return (wc >= 0xd800 && wc <= 0xdfff); 149} 150 151static __inline void 152/*ARGSUSED*/ 153_citrus_UTF8_init_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s) 154{ 155 156 s->chlen = 0; 157} 158 159#if 0 160static __inline void 161/*ARGSUSED*/ 162_citrus_UTF8_pack_state(_UTF8EncodingInfo *ei __unused, void *pspriv, 163 const _UTF8State *s) 164{ 165 166 memcpy(pspriv, (const void *)s, sizeof(*s)); 167} 168 169static __inline void 170/*ARGSUSED*/ 171_citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s, 172 const void *pspriv) 173{ 174 175 memcpy((void *)s, pspriv, sizeof(*s)); 176} 177#endif 178 179static int
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