16 /* builtin charmaps */
19 /* only 0-7 are valid as dest charset */
29 /* additional charsets with algorithmic conversion */
34 /* some programs like php need this */
35 int _libiconv_version = _LIBICONV_VERSION;
37 /* these must match the constants above */
38 static const unsigned char charsets[] =
41 "\000" "UTF-16BE" "\0"
42 "\001" "UTF-16LE" "\0"
43 "\002" "UTF-32BE" "\0"
44 "\003" "UTF-32LE" "\0"
46 "\006" "US-ASCII" "\0"
47 "\006" "ISO646-US" "\0"
48 "\006" "ISO_646.IRV:1991" "\0"
49 "\006" "ISO-IR-6" "\0"
50 "\006" "ANSI_X3.4-1968" "\0"
51 "\006" "ANSI_X3.4-1986" "\0"
56 "\007" "ISO-8859-1" "\0"
58 "\010" "ISO-8859-15""\0"
60 "\011" "ISO-8859-11""\0"
62 "\012" "JIS-0201" "\0"
65 /* separate identifiers for sbcs/dbcs/etc map type */
74 /* FIXME: these are not implemented yet
76 // GBK: 81-FE 40-7E,80-FE
77 // Big5: A1-FE 40-7E,A1-FE
80 static const unsigned short maplen[] = {
81 [UCS2_8BIT] = 4+ 2* 128,
82 [UCS3_8BIT] = 4+ 3* 128,
84 [SHIFT_JIS] = 4+ 2* 94*94,
85 [BIG5] = 4+ 2* 94*157,
86 [GBK] = 4+ 2* 126*190,
87 [EUC_TW] = 4+ 2* 2*94*94,
90 static int find_charmap(const char *name)
93 for (i = 0; i < (sizeof(charmaps) / sizeof(charmaps[0])); i++)
94 if (!strcasecmp(charmaps[i].name, name))
99 static int find_charset(const char *name)
101 const unsigned char *s;
102 for (s=charsets; *s<0xff && strcasecmp(s+1, name); s+=strlen(s)+1);
106 iconv_t iconv_open(const char *to, const char *from)
111 if ((t = find_charset(to)) > 8)
114 if ((f = find_charset(from)) < 255)
115 return 0 | (t<<1) | (f<<8);
117 if ((m = find_charmap(from)) > -1)
118 return 1 | (t<<1) | (m<<8);
123 int iconv_close(iconv_t cd)
128 static inline wchar_t get_16(const unsigned char *s, int endian)
131 return s[endian]<<8 | s[endian^1];
134 static inline void put_16(unsigned char *s, wchar_t c, int endian)
141 static inline int utf8enc_wchar(char *outb, wchar_t c)
147 else if (c <= 0x7FF) {
148 *outb++ = ((c >> 6) & 0x1F) | 0xC0;
149 *outb++ = ( c & 0x3F) | 0x80;
152 else if (c <= 0xFFFF) {
153 *outb++ = ((c >> 12) & 0x0F) | 0xE0;
154 *outb++ = ((c >> 6) & 0x3F) | 0x80;
155 *outb++ = ( c & 0x3F) | 0x80;
158 else if (c <= 0x10FFFF) {
159 *outb++ = ((c >> 18) & 0x07) | 0xF0;
160 *outb++ = ((c >> 12) & 0x3F) | 0x80;
161 *outb++ = ((c >> 6) & 0x3F) | 0x80;
162 *outb++ = ( c & 0x3F) | 0x80;
171 static inline int utf8seq_is_overlong(char *s, int n)
176 /* 1100000x (10xxxxxx) */
177 return (((*s >> 1) == 0x60) &&
178 ((*(s+1) >> 6) == 0x02));
181 /* 11100000 100xxxxx (10xxxxxx) */
182 return ((*s == 0xE0) &&
183 ((*(s+1) >> 5) == 0x04) &&
184 ((*(s+2) >> 6) == 0x02));
187 /* 11110000 1000xxxx (10xxxxxx 10xxxxxx) */
188 return ((*s == 0xF0) &&
189 ((*(s+1) >> 4) == 0x08) &&
190 ((*(s+2) >> 6) == 0x02) &&
191 ((*(s+3) >> 6) == 0x02));
197 static inline int utf8seq_is_surrogate(char *s, int n)
199 return ((n == 3) && (*s == 0xED) && (*(s+1) >= 0xA0) && (*(s+1) <= 0xBF));
202 static inline int utf8seq_is_illegal(char *s, int n)
204 return ((n == 3) && (*s == 0xEF) && (*(s+1) == 0xBF) &&
205 (*(s+2) >= 0xBE) && (*(s+2) <= 0xBF));
208 static inline int utf8dec_wchar(wchar_t *c, unsigned char *in, size_t inb)
219 /* find utf8 sequence length */
220 if ((*in & 0xE0) == 0xC0) n = 2;
221 else if ((*in & 0xF0) == 0xE0) n = 3;
222 else if ((*in & 0xF8) == 0xF0) n = 4;
223 else if ((*in & 0xFC) == 0xF8) n = 5;
224 else if ((*in & 0xFE) == 0xFC) n = 6;
231 if (n > 1 && n < 5) {
232 /* reject invalid sequences */
233 if (utf8seq_is_overlong(in, n) ||
234 utf8seq_is_surrogate(in, n) ||
235 utf8seq_is_illegal(in, n))
239 *c = (char)(*in++ & (0x7F >> n));
241 for (i = 1; i < n; i++) {
242 /* illegal continuation byte */
243 if (*in < 0x80 || *in > 0xBF)
246 *c = (*c << 6) | (*in++ & 0x3F);
252 /* unmapped sequence (> 4) */
256 static inline wchar_t latin9_translit(wchar_t c)
258 /* a number of trivial iso-8859-15 <> utf-8 transliterations */
260 case 0x20AC: return 0xA4; /* Euro */
261 case 0x0160: return 0xA6; /* S caron */
262 case 0x0161: return 0xA8; /* s caron */
263 case 0x017D: return 0xB4; /* Z caron */
264 case 0x017E: return 0xB8; /* z caron */
265 case 0x0152: return 0xBC; /* OE */
266 case 0x0153: return 0xBD; /* oe */
267 case 0x0178: return 0xBE; /* Y diaeresis */
268 default: return 0xFFFD; /* cannot translate */
272 size_t iconv(iconv_t cd, char **in, size_t *inb, char **out, size_t *outb)
275 unsigned char to = (cd>>1)&127;
276 unsigned char from = 255;
277 const unsigned char *map = 0;
278 char tmp[MB_LEN_MAX];
283 if (!in || !*in || !*inb) return 0;
286 map = charmaps[cd>>8].map;
290 for (; *inb; *in+=l, *inb-=l) {
291 c = *(unsigned char *)*in;
293 if (from >= UTF_8 && c < 0x80) goto charok;
297 if (*inb < l) goto starved;
301 l = utf8dec_wchar(&c, *in, *inb);
303 else if (l == (size_t)-1) goto ilseq;
304 else if (l == (size_t)-2) goto starved;
309 if ((unsigned)c - 0xa4 <= 0xbe - 0xa4) {
310 static const unsigned char map[] = {
311 0, 0x60, 0, 0x61, 0, 0, 0, 0, 0, 0, 0,
312 0, 0, 0, 0, 0x7d, 0, 0, 0, 0x7e, 0, 0, 0,
315 if (c == 0xa4) c = 0x20ac;
316 else if (map[c-0xa5]) c = 0x100 | map[c-0xa5];
321 if (c >= 0xa1) c += 0x0e01-0xa1;
325 if (c <= 0xdf) c += 0xff61-0xa1;
332 if (*inb < 2) goto starved;
333 c = get_16(*in, from);
334 if ((unsigned)(c-0xdc00) < 0x400) goto ilseq;
335 if ((unsigned)(c-0xd800) < 0x400) {
337 if (*inb < 4) goto starved;
338 d = get_16(*in + 2, from);
339 if ((unsigned)(c-0xdc00) >= 0x400) goto ilseq;
340 c = ((c-0xd800)<<10) | (d-0xdc00);
346 if (*inb < 4) goto starved;
348 // c = get_32(*in, from);
351 /* only support ascii supersets */
358 if ((unsigned)c - 0xa1 >= 94) goto ilseq;
359 if ((unsigned)in[0][1] - 0xa1 >= 94) goto ilseq;
360 c = (c-0xa1)*94 + (in[0][1]-0xa1);
364 if ((unsigned)c - 0xa1 <= 0xdf-0xa1) {
374 c = get_16(map + 4 + 2*c, 0);
375 if (c == 0xffff) goto ilseq;
379 if ((unsigned)c - 0xd800 < 0x800 || (unsigned)c >= 0x110000)
384 if (*outb < sizeof(wchar_t)) goto toobig;
385 *(wchar_t *)*out = c;
386 *out += sizeof(wchar_t);
387 *outb -= sizeof(wchar_t);
391 k = utf8enc_wchar(tmp, c);
392 if (*outb < k) goto toobig;
393 memcpy(*out, tmp, k);
394 } else k = utf8enc_wchar(*out, c);
399 if (c > 0x7f) c = 0xfffd;
400 /* fall thru and count replacement in latin1 case */
402 if (c >= 0x100 && c != 0xfffd)
403 c = latin9_translit(c);
406 if (c > 0xff) goto ilseq;
407 if (!*outb) goto toobig;
415 if (*outb < 2) goto toobig;
421 if (*outb < 4) goto toobig;
422 put_16(*out, (c>>10)|0xd800, to);
423 put_16(*out + 2, (c&0x3ff)|0xdc00, to);