| 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;
|
|---|
| 394 | *outb -= k;
|
|---|
| 395 | break;
|
|---|
| 396 | case US_ASCII:
|
|---|
| 397 | if (c > 0x7f) subst: x++, c='*';
|
|---|
| 398 | default:
|
|---|
| 399 | if (*outb < 1) goto toobig;
|
|---|
| 400 | if (c < 128+totype || (c<256 && c==legacy_map(tomap, c))) {
|
|---|
| 401 | revout:
|
|---|
| 402 | *(*out)++ = c;
|
|---|
| 403 | *outb -= 1;
|
|---|
| 404 | break;
|
|---|
| 405 | }
|
|---|
| 406 | d = c;
|
|---|
| 407 | for (c=128+totype; c<256; c++) {
|
|---|
| 408 | if (d == legacy_map(tomap, c)) {
|
|---|
| 409 | goto revout;
|
|---|
| 410 | }
|
|---|
| 411 | }
|
|---|
| 412 | goto subst;
|
|---|
| 413 | case UCS2BE:
|
|---|
| 414 | case UCS2LE:
|
|---|
| 415 | case UTF_16BE:
|
|---|
| 416 | case UTF_16LE:
|
|---|
| 417 | if (c < 0x10000 || type-UCS2BE < 2U) {
|
|---|
| 418 | if (c >= 0x10000) c = 0xFFFD;
|
|---|
| 419 | if (*outb < 2) goto toobig;
|
|---|
| 420 | put_16((void *)*out, c, totype);
|
|---|
| 421 | *out += 2;
|
|---|
| 422 | *outb -= 2;
|
|---|
| 423 | break;
|
|---|
| 424 | }
|
|---|
| 425 | if (*outb < 4) goto toobig;
|
|---|
| 426 | c -= 0x10000;
|
|---|
| 427 | put_16((void *)*out, (c>>10)|0xd800, totype);
|
|---|
| 428 | put_16((void *)(*out + 2), (c&0x3ff)|0xdc00, totype);
|
|---|
| 429 | *out += 4;
|
|---|
| 430 | *outb -= 4;
|
|---|
| 431 | break;
|
|---|
| 432 | case UTF_32BE:
|
|---|
| 433 | case UTF_32LE:
|
|---|
| 434 | if (*outb < 4) goto toobig;
|
|---|
| 435 | put_32((void *)*out, c, totype);
|
|---|
| 436 | *out += 4;
|
|---|
| 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 | }
|
|---|
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