1 | #include <iconv.h>
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2 | #include <errno.h>
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3 | #include <wchar.h>
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4 | #include <string.h>
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5 | #include <stdlib.h>
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6 | #include <limits.h>
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7 | #include <stdint.h>
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8 | #include "locale_impl.h"
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9 |
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10 | #define UTF_32BE 0300
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11 | #define UTF_16LE 0301
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12 | #define UTF_16BE 0302
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13 | #define UTF_32LE 0303
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14 | #define UCS2BE 0304
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15 | #define UCS2LE 0305
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16 | #define WCHAR_T 0306
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17 | #define US_ASCII 0307
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18 | #define UTF_8 0310
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19 | #define EUC_JP 0320
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20 | #define SHIFT_JIS 0321
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21 | #define GB18030 0330
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22 | #define GBK 0331
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23 | #define GB2312 0332
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24 | #define BIG5 0340
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25 | #define EUC_KR 0350
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26 |
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27 | /* Definitions of charmaps. Each charmap consists of:
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28 | * 1. Empty-string-terminated list of null-terminated aliases.
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29 | * 2. Special type code or number of elided entries.
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30 | * 3. Character table (size determined by field 2). */
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31 |
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32 | static const unsigned char charmaps[] =
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33 | "utf8\0char\0\0\310"
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34 | "wchart\0\0\306"
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35 | "ucs2\0ucs2be\0\0\304"
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36 | "ucs2le\0\0\305"
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37 | "utf16\0utf16be\0\0\302"
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38 | "utf16le\0\0\301"
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39 | "ucs4\0ucs4be\0utf32\0utf32be\0\0\300"
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40 | "ucs4le\0utf32le\0\0\303"
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41 | "ascii\0usascii\0iso646\0iso646us\0\0\307"
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42 | "eucjp\0\0\320"
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43 | "shiftjis\0sjis\0\0\321"
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44 | "gb18030\0\0\330"
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45 | "gbk\0\0\331"
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46 | "gb2312\0\0\332"
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47 | "big5\0bigfive\0cp950\0big5hkscs\0\0\340"
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48 | "euckr\0ksc5601\0ksx1001\0cp949\0\0\350"
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49 | #include "codepages.h"
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50 | ;
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51 |
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52 | static const unsigned short legacy_chars[] = {
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53 | #include "legacychars.h"
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54 | };
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55 |
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56 | static const unsigned short jis0208[84][94] = {
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57 | #include "jis0208.h"
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58 | };
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59 |
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60 | static const unsigned short gb18030[126][190] = {
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61 | #include "gb18030.h"
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62 | };
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63 |
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64 | static const unsigned short big5[89][157] = {
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65 | #include "big5.h"
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66 | };
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67 |
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68 | static const unsigned short hkscs[] = {
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69 | #include "hkscs.h"
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70 | };
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71 |
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72 | static const unsigned short ksc[93][94] = {
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73 | #include "ksc.h"
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74 | };
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75 |
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76 | static int fuzzycmp(const unsigned char *a, const unsigned char *b)
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77 | {
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78 | for (; *a && *b; a++, b++) {
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79 | while (*a && (*a|32U)-'a'>26 && *a-'0'>10U) a++;
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80 | if ((*a|32U) != *b) return 1;
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81 | }
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82 | return *a != *b;
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83 | }
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84 |
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85 | static size_t find_charmap(const void *name)
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86 | {
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87 | const unsigned char *s;
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88 | if (!*(char *)name) name=charmaps; /* "utf8" */
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89 | for (s=charmaps; *s; ) {
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90 | if (!fuzzycmp(name, s)) {
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91 | for (; *s; s+=strlen((void *)s)+1);
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92 | return s+1-charmaps;
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93 | }
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94 | s += strlen((void *)s)+1;
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95 | if (!*s) {
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96 | if (s[1] > 0200) s+=2;
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97 | else s+=2+(128U-s[1])/4*5;
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98 | }
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99 | }
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100 | return -1;
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101 | }
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102 |
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103 | iconv_t iconv_open(const char *to, const char *from)
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104 | {
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105 | size_t f, t;
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106 |
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107 | if ((t = find_charmap(to))==-1
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108 | || (f = find_charmap(from))==-1
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109 | || (charmaps[t] >= 0320)) {
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110 | errno = EINVAL;
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111 | return (iconv_t)-1;
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112 | }
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113 |
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114 | return (void *)(f<<16 | t);
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115 | }
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116 |
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117 | int iconv_close(iconv_t cd)
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118 | {
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119 | return 0;
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120 | }
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121 |
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122 | static unsigned get_16(const unsigned char *s, int e)
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123 | {
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124 | e &= 1;
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125 | return s[e]<<8 | s[1-e];
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126 | }
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127 |
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128 | static void put_16(unsigned char *s, unsigned c, int e)
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129 | {
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130 | e &= 1;
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131 | s[e] = c>>8;
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132 | s[1-e] = c;
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133 | }
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134 |
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135 | static unsigned get_32(const unsigned char *s, int e)
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136 | {
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137 | e &= 3;
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138 | return (s[e]+0U)<<24 | s[e^1]<<16 | s[e^2]<<8 | s[e^3];
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139 | }
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140 |
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141 | static void put_32(unsigned char *s, unsigned c, int e)
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142 | {
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143 | e &= 3;
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144 | s[e^0] = c>>24;
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145 | s[e^1] = c>>16;
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146 | s[e^2] = c>>8;
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147 | s[e^3] = c;
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148 | }
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149 |
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150 | /* Adapt as needed */
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151 | #define mbrtowc_utf8 mbrtowc
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152 | #define wctomb_utf8 wctomb
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153 |
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154 | static unsigned legacy_map(const unsigned char *map, unsigned c)
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155 | {
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156 | unsigned x = c - 128 - map[-1];
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157 | x = legacy_chars[ map[x*5/4]>>2*x%8 |
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158 | (map[x*5/4+1]<<(8-2*x%8) & 1023) ];
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159 | return x ? x : c;
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160 | }
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161 |
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162 | size_t iconv(iconv_t cd0, char **restrict in, size_t *restrict inb, char **restrict out, size_t *restrict outb)
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163 | {
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164 | size_t x=0;
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165 | unsigned long cd = (unsigned long)cd0;
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166 | unsigned to = cd & 0xffff;
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167 | unsigned from = cd >> 16;
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168 | const unsigned char *map = charmaps+from+1;
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169 | const unsigned char *tomap = charmaps+to+1;
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170 | mbstate_t st = {0};
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171 | wchar_t wc;
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172 | unsigned c, d;
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173 | size_t k, l;
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174 | int err;
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175 | unsigned char type = map[-1];
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176 | unsigned char totype = tomap[-1];
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177 | locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
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178 |
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179 | if (!in || !*in || !*inb) return 0;
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180 |
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181 | *ploc = UTF8_LOCALE;
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182 |
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183 | for (; *inb; *in+=l, *inb-=l) {
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184 | c = *(unsigned char *)*in;
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185 | l = 1;
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186 |
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187 | if (c >= 128 || type-UTF_32BE < 7U) switch (type) {
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188 | case UTF_8:
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189 | l = mbrtowc_utf8(&wc, *in, *inb, &st);
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190 | if (!l) l++;
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191 | else if (l == (size_t)-1) goto ilseq;
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192 | else if (l == (size_t)-2) goto starved;
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193 | c = wc;
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194 | break;
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195 | case US_ASCII:
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196 | goto ilseq;
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197 | case WCHAR_T:
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198 | l = sizeof(wchar_t);
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199 | if (*inb < l) goto starved;
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200 | c = *(wchar_t *)*in;
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201 | if (0) {
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202 | case UTF_32BE:
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203 | case UTF_32LE:
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204 | l = 4;
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205 | if (*inb < 4) goto starved;
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206 | c = get_32((void *)*in, type);
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207 | }
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208 | if (c-0xd800u < 0x800u || c >= 0x110000u) goto ilseq;
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209 | break;
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210 | case UCS2BE:
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211 | case UCS2LE:
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212 | case UTF_16BE:
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213 | case UTF_16LE:
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214 | l = 2;
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215 | if (*inb < 2) goto starved;
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216 | c = get_16((void *)*in, type);
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217 | if ((unsigned)(c-0xdc00) < 0x400) goto ilseq;
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218 | if ((unsigned)(c-0xd800) < 0x400) {
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219 | if (type-UCS2BE < 2U) goto ilseq;
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220 | l = 4;
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221 | if (*inb < 4) goto starved;
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222 | d = get_16((void *)(*in + 2), type);
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223 | if ((unsigned)(d-0xdc00) >= 0x400) goto ilseq;
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224 | c = ((c-0xd7c0)<<10) + (d-0xdc00);
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225 | }
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226 | break;
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227 | case SHIFT_JIS:
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228 | if (c-0xa1 <= 0xdf-0xa1) {
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229 | c += 0xff61-0xa1;
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230 | break;
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231 | }
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232 | l = 2;
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233 | if (*inb < 2) goto starved;
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234 | d = *((unsigned char *)*in + 1);
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235 | if (c-129 <= 159-129) c -= 129;
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236 | else if (c-224 <= 239-224) c -= 193;
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237 | else goto ilseq;
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238 | c *= 2;
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239 | if (d-64 <= 158-64) {
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240 | if (d==127) goto ilseq;
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241 | if (d>127) d--;
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242 | d -= 64;
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243 | } else if (d-159 <= 252-159) {
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244 | c++;
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245 | d -= 159;
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246 | }
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247 | c = jis0208[c][d];
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248 | if (!c) goto ilseq;
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249 | break;
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250 | case EUC_JP:
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251 | l = 2;
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252 | if (*inb < 2) goto starved;
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253 | d = *((unsigned char *)*in + 1);
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254 | if (c==0x8e) {
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255 | c = d;
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256 | if (c-0xa1 > 0xdf-0xa1) goto ilseq;
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257 | c += 0xff61 - 0xa1;
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258 | break;
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259 | }
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260 | c -= 0xa1;
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261 | d -= 0xa1;
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262 | if (c >= 84 || d >= 94) goto ilseq;
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263 | c = jis0208[c][d];
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264 | if (!c) goto ilseq;
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265 | break;
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266 | case GB2312:
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267 | if (c < 0xa1) goto ilseq;
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268 | case GBK:
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269 | case GB18030:
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270 | c -= 0x81;
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271 | if (c >= 126) goto ilseq;
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272 | l = 2;
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273 | if (*inb < 2) goto starved;
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274 | d = *((unsigned char *)*in + 1);
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275 | if (d < 0xa1 && type == GB2312) goto ilseq;
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276 | if (d-0x40>=191 || d==127) {
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277 | if (d-'0'>9 || type != GB18030)
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278 | goto ilseq;
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279 | l = 4;
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280 | if (*inb < 4) goto starved;
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281 | c = (10*c + d-'0') * 1260;
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282 | d = *((unsigned char *)*in + 2);
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283 | if (d-0x81>126) goto ilseq;
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284 | c += 10*(d-0x81);
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285 | d = *((unsigned char *)*in + 3);
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286 | if (d-'0'>9) goto ilseq;
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287 | c += d-'0';
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288 | c += 128;
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289 | for (d=0; d<=c; ) {
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290 | k = 0;
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291 | for (int i=0; i<126; i++)
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292 | for (int j=0; j<190; j++)
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293 | if (gb18030[i][j]-d <= c-d)
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294 | k++;
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295 | d = c+1;
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296 | c += k;
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297 | }
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298 | break;
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299 | }
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300 | d -= 0x40;
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301 | if (d>63) d--;
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302 | c = gb18030[c][d];
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303 | break;
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304 | case BIG5:
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305 | l = 2;
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306 | if (*inb < 2) goto starved;
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307 | d = *((unsigned char *)*in + 1);
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308 | if (d-0x40>=0xff-0x40 || d-0x7f<0xa1-0x7f) goto ilseq;
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309 | d -= 0x40;
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310 | if (d > 0x3e) d -= 0x22;
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311 | if (c-0xa1>=0xfa-0xa1) {
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312 | if (c-0x87>=0xff-0x87) goto ilseq;
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313 | if (c < 0xa1) c -= 0x87;
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314 | else c -= 0x87 + (0xfa-0xa1);
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315 | c = (hkscs[4867+(c*157+d)/16]>>(c*157+d)%16)%2<<17
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316 | | hkscs[c*157+d];
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317 | /* A few HKSCS characters map to pairs of UCS
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318 | * characters. These are mapped to surrogate
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319 | * range in the hkscs table then hard-coded
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320 | * here. Ugly, yes. */
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321 | if (c/256 == 0xdc) {
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322 | if (totype-0300U > 8) k = 2;
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323 | else k = "\10\4\4\10\4\4\10\2\4"[totype-0300];
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324 | if (k > *outb) goto toobig;
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325 | x += iconv((iconv_t)(uintptr_t)to,
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326 | &(char *){"\303\212\314\204"
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327 | "\303\212\314\214"
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328 | "\303\252\314\204"
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329 | "\303\252\314\214"
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330 | +c%256}, &(size_t){4},
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331 | out, outb);
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332 | continue;
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333 | }
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334 | if (!c) goto ilseq;
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335 | break;
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336 | }
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337 | c -= 0xa1;
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338 | c = big5[c][d]|(c==0x27&&(d==0x3a||d==0x3c||d==0x42))<<17;
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339 | if (!c) goto ilseq;
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340 | break;
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341 | case EUC_KR:
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342 | l = 2;
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343 | if (*inb < 2) goto starved;
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344 | d = *((unsigned char *)*in + 1);
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345 | c -= 0xa1;
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346 | d -= 0xa1;
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347 | if (c >= 93 || d >= 94) {
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348 | c += (0xa1-0x81);
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349 | d += 0xa1;
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350 | if (c >= 93 || (c>=0xc6-0x81 && d>0x52))
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351 | goto ilseq;
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352 | if (d-'A'<26) d = d-'A';
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353 | else if (d-'a'<26) d = d-'a'+26;
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354 | else if (d-0x81<0xff-0x81) d = d-0x81+52;
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355 | else goto ilseq;
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356 | if (c < 0x20) c = 178*c + d;
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357 | else c = 178*0x20 + 84*(c-0x20) + d;
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358 | c += 0xac00;
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359 | for (d=0xac00; d<=c; ) {
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360 | k = 0;
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361 | for (int i=0; i<93; i++)
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362 | for (int j=0; j<94; j++)
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363 | if (ksc[i][j]-d <= c-d)
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364 | k++;
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365 | d = c+1;
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366 | c += k;
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367 | }
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368 | break;
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369 | }
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370 | c = ksc[c][d];
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371 | if (!c) goto ilseq;
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372 | break;
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373 | default:
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374 | if (c < 128+type) break;
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375 | c = legacy_map(map, c);
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376 | if (c==1) goto ilseq;
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377 | }
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378 |
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379 | switch (totype) {
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380 | case WCHAR_T:
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381 | if (*outb < sizeof(wchar_t)) goto toobig;
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382 | *(wchar_t *)*out = c;
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383 | *out += sizeof(wchar_t);
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384 | *outb -= sizeof(wchar_t);
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385 | break;
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386 | case UTF_8:
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387 | if (*outb < 4) {
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388 | char tmp[4];
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389 | k = wctomb_utf8(tmp, c);
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390 | if (*outb < k) goto toobig;
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391 | memcpy(*out, tmp, k);
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392 | } else k = wctomb_utf8(*out, c);
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393 | *out += k;
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394 | *outb -= k;
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395 | break;
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396 | case US_ASCII:
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397 | if (c > 0x7f) subst: x++, c='*';
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398 | default:
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399 | if (*outb < 1) goto toobig;
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400 | if (c < 128+totype || (c<256 && c==legacy_map(tomap, c))) {
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401 | revout:
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402 | *(*out)++ = c;
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403 | *outb -= 1;
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404 | break;
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405 | }
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406 | d = c;
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407 | for (c=128+totype; c<256; c++) {
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408 | if (d == legacy_map(tomap, c)) {
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409 | goto revout;
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410 | }
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411 | }
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412 | goto subst;
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413 | case UCS2BE:
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414 | case UCS2LE:
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415 | case UTF_16BE:
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416 | case UTF_16LE:
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417 | if (c < 0x10000 || type-UCS2BE < 2U) {
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418 | if (c >= 0x10000) c = 0xFFFD;
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419 | if (*outb < 2) goto toobig;
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420 | put_16((void *)*out, c, totype);
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421 | *out += 2;
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422 | *outb -= 2;
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423 | break;
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424 | }
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425 | if (*outb < 4) goto toobig;
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426 | c -= 0x10000;
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427 | put_16((void *)*out, (c>>10)|0xd800, totype);
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428 | put_16((void *)(*out + 2), (c&0x3ff)|0xdc00, totype);
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429 | *out += 4;
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430 | *outb -= 4;
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431 | break;
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432 | case UTF_32BE:
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433 | case UTF_32LE:
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434 | if (*outb < 4) goto toobig;
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435 | put_32((void *)*out, c, totype);
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436 | *out += 4;
|
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437 | *outb -= 4;
|
---|
438 | break;
|
---|
439 | }
|
---|
440 | }
|
---|
441 | *ploc = loc;
|
---|
442 | return x;
|
---|
443 | ilseq:
|
---|
444 | err = EILSEQ;
|
---|
445 | x = -1;
|
---|
446 | goto end;
|
---|
447 | toobig:
|
---|
448 | err = E2BIG;
|
---|
449 | x = -1;
|
---|
450 | goto end;
|
---|
451 | starved:
|
---|
452 | err = EINVAL;
|
---|
453 | x = -1;
|
---|
454 | end:
|
---|
455 | errno = err;
|
---|
456 | *ploc = loc;
|
---|
457 | return x;
|
---|
458 | }
|
---|