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#include <iconv.h>
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#include <errno.h>
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#include <wchar.h>
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#include <string.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <stdint.h>
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#define UTF_32BE 0300
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#define UTF_16LE 0301
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#define UTF_16BE 0302
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#define UTF_32LE 0303
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#define UCS2BE 0304
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#define UCS2LE 0305
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#define WCHAR_T 0306
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#define US_ASCII 0307
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#define UTF_8 0310
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#define EUC_JP 0320
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#define SHIFT_JIS 0321
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#define GB18030 0330
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#define GBK 0331
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#define GB2312 0332
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#define BIG5 0340
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#define EUC_KR 0350
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/* Definitions of charmaps. Each charmap consists of:
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* 1. Empty-string-terminated list of null-terminated aliases.
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* 2. Special type code or number of elided entries.
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* 3. Character table (size determined by field 2). */
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static const unsigned char charmaps[] =
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"utf8\0char\0\0\310"
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"wchart\0\0\306"
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"ucs2\0ucs2be\0\0\304"
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"ucs2le\0\0\305"
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"utf16\0utf16be\0\0\302"
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"utf16le\0\0\301"
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"ucs4\0ucs4be\0utf32\0utf32be\0\0\300"
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"ucs4le\0utf32le\0\0\303"
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"ascii\0usascii\0iso646\0iso646us\0\0\307"
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"eucjp\0\0\320"
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"shiftjis\0sjis\0\0\321"
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"gb18030\0\0\330"
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"gbk\0\0\331"
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"gb2312\0\0\332"
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add hkscs/big5-2003/eten extensions to iconv big5
with these changes, the character set implemented as "big5" in musl is
a pure superset of cp950, the canonical "big5", and agrees with the
normative parts of Unicode. this means it has minor differences from
both hkscs and big5-2003:
- the range A2CC-A2CE maps to CJK ideographs rather than numerals,
contrary to changes made in big5-2003.
- C6CD maps to a CJK ideograph rather than its corresponding Kangxi
radical character, contrary to changes made in hkscs.
- F9FE maps to U+2593 rather than U+FFED.
of these differences, none but the last are visually distinct, and the
last is a character used purely for text-based graphics, not to convey
linguistic content.
should there be future demand for strict conformance to big5-2003 or
hkscs mappings, the present charset aliases can be replaced with
distinct variants.
reportedly there are other non-standard big5 extensions in common use
in Taiwan and perhaps elsewhere, which could also be added as layers
on top of the existing big5 support.
there may be additional characters which should be added to the hkscs
table: the whatwg standard for big5 defines what appears to be a
superset of hkscs.
13 years ago
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"big5\0bigfive\0cp950\0big5hkscs\0\0\340"
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"euckr\0ksc5601\0ksx1001\0cp949\0\0\350"
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#include "codepages.h"
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;
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static const unsigned short legacy_chars[] = {
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#include "legacychars.h"
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};
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static const unsigned short jis0208[84][94] = {
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#include "jis0208.h"
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};
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static const unsigned short gb18030[126][190] = {
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#include "gb18030.h"
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};
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static const unsigned short big5[89][157] = {
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#include "big5.h"
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};
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|
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add hkscs/big5-2003/eten extensions to iconv big5
with these changes, the character set implemented as "big5" in musl is
a pure superset of cp950, the canonical "big5", and agrees with the
normative parts of Unicode. this means it has minor differences from
both hkscs and big5-2003:
- the range A2CC-A2CE maps to CJK ideographs rather than numerals,
contrary to changes made in big5-2003.
- C6CD maps to a CJK ideograph rather than its corresponding Kangxi
radical character, contrary to changes made in hkscs.
- F9FE maps to U+2593 rather than U+FFED.
of these differences, none but the last are visually distinct, and the
last is a character used purely for text-based graphics, not to convey
linguistic content.
should there be future demand for strict conformance to big5-2003 or
hkscs mappings, the present charset aliases can be replaced with
distinct variants.
reportedly there are other non-standard big5 extensions in common use
in Taiwan and perhaps elsewhere, which could also be added as layers
on top of the existing big5 support.
there may be additional characters which should be added to the hkscs
table: the whatwg standard for big5 defines what appears to be a
superset of hkscs.
13 years ago
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static const unsigned short hkscs[] = {
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#include "hkscs.h"
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};
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static const unsigned short ksc[93][94] = {
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#include "ksc.h"
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};
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static int fuzzycmp(const unsigned char *a, const unsigned char *b)
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{
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for (; *a && *b; a++, b++) {
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while (*a && (*a|32U)-'a'>26 && *a-'0'>10U) a++;
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if ((*a|32U) != *b) return 1;
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}
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return *a != *b;
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}
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static size_t find_charmap(const void *name)
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{
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const unsigned char *s;
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if (!*(char *)name) name=charmaps; /* "utf8" */
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for (s=charmaps; *s; ) {
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if (!fuzzycmp(name, s)) {
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for (; *s; s+=strlen((void *)s)+1);
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return s+1-charmaps;
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}
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s += strlen((void *)s)+1;
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if (!*s) {
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if (s[1] > 0200) s+=2;
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else s+=2+(128U-s[1])/4*5;
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}
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}
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return -1;
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}
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iconv_t iconv_open(const char *to, const char *from)
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{
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size_t f, t;
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if ((t = find_charmap(to))==-1
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|| (f = find_charmap(from))==-1
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|| (charmaps[t] >= 0320)) {
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errno = EINVAL;
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return (iconv_t)-1;
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}
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return (void *)(f<<16 | t);
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}
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int iconv_close(iconv_t cd)
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{
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return 0;
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}
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static unsigned get_16(const unsigned char *s, int e)
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{
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e &= 1;
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return s[e]<<8 | s[1-e];
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}
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static void put_16(unsigned char *s, unsigned c, int e)
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{
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e &= 1;
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s[e] = c>>8;
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s[1-e] = c;
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}
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static unsigned get_32(const unsigned char *s, int e)
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{
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e &= 3;
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return s[e]+0U<<24 | s[e^1]<<16 | s[e^2]<<8 | s[e^3];
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}
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static void put_32(unsigned char *s, unsigned c, int e)
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{
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e &= 3;
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s[e^0] = c>>24;
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s[e^1] = c>>16;
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s[e^2] = c>>8;
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s[e^3] = c;
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}
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/* Adapt as needed */
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#define mbrtowc_utf8 mbrtowc
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#define wctomb_utf8 wctomb
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size_t iconv(iconv_t cd0, char **restrict in, size_t *restrict inb, char **restrict out, size_t *restrict outb)
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{
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size_t x=0;
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unsigned long cd = (unsigned long)cd0;
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unsigned to = cd & 0xffff;
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unsigned from = cd >> 16;
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const unsigned char *map = charmaps+from+1;
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const unsigned char *tomap = charmaps+to+1;
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mbstate_t st = {0};
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wchar_t wc;
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unsigned c, d;
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size_t k, l;
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int err;
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unsigned char type = map[-1];
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unsigned char totype = tomap[-1];
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if (!in || !*in || !*inb) return 0;
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for (; *inb; *in+=l, *inb-=l) {
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c = *(unsigned char *)*in;
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l = 1;
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if (c >= 128 || type-UTF_32BE < 7U) switch (type) {
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case UTF_8:
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l = mbrtowc_utf8(&wc, *in, *inb, &st);
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if (!l) l++;
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else if (l == (size_t)-1) goto ilseq;
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else if (l == (size_t)-2) goto starved;
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c = wc;
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break;
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case US_ASCII:
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goto ilseq;
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case WCHAR_T:
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l = sizeof(wchar_t);
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if (*inb < l) goto starved;
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c = *(wchar_t *)*in;
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if (0) {
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case UTF_32BE:
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case UTF_32LE:
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l = 4;
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if (*inb < 4) goto starved;
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c = get_32((void *)*in, type);
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}
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if (c-0xd800u < 0x800u || c >= 0x110000u) goto ilseq;
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break;
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case UCS2BE:
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case UCS2LE:
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case UTF_16BE:
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case UTF_16LE:
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l = 2;
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if (*inb < 2) goto starved;
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c = get_16((void *)*in, type);
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if ((unsigned)(c-0xdc00) < 0x400) goto ilseq;
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if ((unsigned)(c-0xd800) < 0x400) {
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if (type-UCS2BE < 2U) goto ilseq;
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l = 4;
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if (*inb < 4) goto starved;
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d = get_16((void *)(*in + 2), type);
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if ((unsigned)(d-0xdc00) >= 0x400) goto ilseq;
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c = ((c-0xd7c0)<<10) + (d-0xdc00);
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}
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break;
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case SHIFT_JIS:
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if (c-0xa1 <= 0xdf-0xa1) {
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c += 0xff61-0xa1;
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break;
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}
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l = 2;
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if (*inb < 2) goto starved;
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d = *((unsigned char *)*in + 1);
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if (c-129 <= 159-129) c -= 129;
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else if (c-224 <= 239-224) c -= 193;
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else goto ilseq;
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c *= 2;
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if (d-64 <= 158-64) {
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if (d==127) goto ilseq;
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if (d>127) d--;
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d -= 64;
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} else if (d-159 <= 252-159) {
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c++;
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d -= 159;
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}
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c = jis0208[c][d];
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if (!c) goto ilseq;
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break;
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case EUC_JP:
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l = 2;
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if (*inb < 2) goto starved;
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d = *((unsigned char *)*in + 1);
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|
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if (c==0x8e) {
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c = d;
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if (c-0xa1 > 0xdf-0xa1) goto ilseq;
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|
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c += 0xff61 - 0xa1;
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|
|
break;
|
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}
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|
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c -= 0xa1;
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|
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d -= 0xa1;
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|
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if (c >= 84 || d >= 94) goto ilseq;
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|
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c = jis0208[c][d];
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|
|
if (!c) goto ilseq;
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|
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break;
|
|
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|
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case GB2312:
|
|
|
|
|
if (c < 0xa1) goto ilseq;
|
|
|
|
|
case GBK:
|
|
|
|
|
case GB18030:
|
|
|
|
|
c -= 0x81;
|
|
|
|
|
if (c >= 126) goto ilseq;
|
|
|
|
|
l = 2;
|
|
|
|
|
if (*inb < 2) goto starved;
|
|
|
|
|
d = *((unsigned char *)*in + 1);
|
|
|
|
|
if (d < 0xa1 && type == GB2312) goto ilseq;
|
|
|
|
|
if (d-0x40>=191 || d==127) {
|
|
|
|
|
if (d-'0'>9 || type != GB18030)
|
|
|
|
|
goto ilseq;
|
|
|
|
|
l = 4;
|
|
|
|
|
if (*inb < 4) goto starved;
|
|
|
|
|
c = (10*c + d-'0') * 1260;
|
|
|
|
|
d = *((unsigned char *)*in + 2);
|
|
|
|
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if (d-0x81>126) goto ilseq;
|
|
|
|
|
c += 10*(d-0x81);
|
|
|
|
|
d = *((unsigned char *)*in + 3);
|
|
|
|
|
if (d-'0'>9) goto ilseq;
|
|
|
|
|
c += d-'0';
|
|
|
|
|
c += 128;
|
|
|
|
|
for (d=0; d<=c; ) {
|
|
|
|
|
k = 0;
|
|
|
|
|
for (int i=0; i<126; i++)
|
|
|
|
|
for (int j=0; j<190; j++)
|
|
|
|
|
if (gb18030[i][j]-d <= c-d)
|
|
|
|
|
k++;
|
|
|
|
|
d = c+1;
|
|
|
|
|
c += k;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
d -= 0x40;
|
|
|
|
|
if (d>63) d--;
|
|
|
|
|
c = gb18030[c][d];
|
|
|
|
|
break;
|
|
|
|
|
case BIG5:
|
|
|
|
|
l = 2;
|
|
|
|
|
if (*inb < 2) goto starved;
|
|
|
|
|
d = *((unsigned char *)*in + 1);
|
|
|
|
|
if (d-0x40>=0xff-0x40 || d-0x7f<0xa1-0x7f) goto ilseq;
|
|
|
|
|
d -= 0x40;
|
|
|
|
|
if (d > 0x3e) d -= 0x22;
|
add hkscs/big5-2003/eten extensions to iconv big5
with these changes, the character set implemented as "big5" in musl is
a pure superset of cp950, the canonical "big5", and agrees with the
normative parts of Unicode. this means it has minor differences from
both hkscs and big5-2003:
- the range A2CC-A2CE maps to CJK ideographs rather than numerals,
contrary to changes made in big5-2003.
- C6CD maps to a CJK ideograph rather than its corresponding Kangxi
radical character, contrary to changes made in hkscs.
- F9FE maps to U+2593 rather than U+FFED.
of these differences, none but the last are visually distinct, and the
last is a character used purely for text-based graphics, not to convey
linguistic content.
should there be future demand for strict conformance to big5-2003 or
hkscs mappings, the present charset aliases can be replaced with
distinct variants.
reportedly there are other non-standard big5 extensions in common use
in Taiwan and perhaps elsewhere, which could also be added as layers
on top of the existing big5 support.
there may be additional characters which should be added to the hkscs
table: the whatwg standard for big5 defines what appears to be a
superset of hkscs.
13 years ago
|
|
|
if (c-0xa1>=0xfa-0xa1) {
|
|
|
|
|
if (c-0x87>=0xff-0x87) goto ilseq;
|
|
|
|
|
if (c < 0xa1) c -= 0x87;
|
|
|
|
|
else c -= 0x87 + (0xfa-0xa1);
|
|
|
|
|
c = (hkscs[4867+(c*157+d)/16]>>(c*157+d)%16)%2<<17
|
|
|
|
|
| hkscs[c*157+d];
|
|
|
|
|
/* A few HKSCS characters map to pairs of UCS
|
|
|
|
|
* characters. These are mapped to surrogate
|
|
|
|
|
* range in the hkscs table then hard-coded
|
|
|
|
|
* here. Ugly, yes. */
|
|
|
|
|
if (c/256 == 0xdc) {
|
|
|
|
|
if (totype-0300U > 8) k = 2;
|
|
|
|
|
else k = "\10\4\4\10\4\4\10\2\4"[totype-0300];
|
|
|
|
|
if (k > *outb) goto toobig;
|
|
|
|
|
x += iconv((iconv_t)(uintptr_t)to,
|
|
|
|
|
&(char *){"\303\212\314\204"
|
|
|
|
|
"\303\212\314\214"
|
|
|
|
|
"\303\252\314\204"
|
|
|
|
|
"\303\252\314\214"
|
|
|
|
|
+c%256}, &(size_t){4},
|
|
|
|
|
out, outb);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
if (!c) goto ilseq;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
c -= 0xa1;
|
|
|
|
|
c = big5[c][d]|(c==0x27&&(d==0x3a||d==0x3c||d==0x42))<<17;
|
|
|
|
|
if (!c) goto ilseq;
|
|
|
|
|
break;
|
|
|
|
|
case EUC_KR:
|
|
|
|
|
l = 2;
|
|
|
|
|
if (*inb < 2) goto starved;
|
|
|
|
|
d = *((unsigned char *)*in + 1);
|
|
|
|
|
c -= 0xa1;
|
|
|
|
|
d -= 0xa1;
|
|
|
|
|
if (c >= 93 || d >= 94) {
|
|
|
|
|
c += (0xa1-0x81);
|
|
|
|
|
d += 0xa1;
|
|
|
|
|
if (c >= 93 || c>=0xc6-0x81 && d>0x52)
|
|
|
|
|
goto ilseq;
|
|
|
|
|
if (d-'A'<26) d = d-'A';
|
|
|
|
|
else if (d-'a'<26) d = d-'a'+26;
|
|
|
|
|
else if (d-0x81<0xff-0x81) d = d-0x81+52;
|
|
|
|
|
else goto ilseq;
|
|
|
|
|
if (c < 0x20) c = 178*c + d;
|
|
|
|
|
else c = 178*0x20 + 84*(c-0x20) + d;
|
|
|
|
|
c += 0xac00;
|
|
|
|
|
for (d=0xac00; d<=c; ) {
|
|
|
|
|
k = 0;
|
|
|
|
|
for (int i=0; i<93; i++)
|
|
|
|
|
for (int j=0; j<94; j++)
|
|
|
|
|
if (ksc[i][j]-d <= c-d)
|
|
|
|
|
k++;
|
|
|
|
|
d = c+1;
|
|
|
|
|
c += k;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
c = ksc[c][d];
|
|
|
|
|
if (!c) goto ilseq;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
if (c < 128+type) break;
|
|
|
|
|
c -= 128+type;
|
|
|
|
|
c = legacy_chars[ map[c*5/4]>>2*c%8 |
|
|
|
|
|
map[c*5/4+1]<<8-2*c%8 & 1023 ];
|
|
|
|
|
if (!c) c = *(unsigned char *)*in;
|
|
|
|
|
if (c==1) goto ilseq;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (totype) {
|
|
|
|
|
case WCHAR_T:
|
|
|
|
|
if (*outb < sizeof(wchar_t)) goto toobig;
|
|
|
|
|
*(wchar_t *)*out = c;
|
|
|
|
|
*out += sizeof(wchar_t);
|
|
|
|
|
*outb -= sizeof(wchar_t);
|
|
|
|
|
break;
|
|
|
|
|
case UTF_8:
|
|
|
|
|
if (*outb < 4) {
|
|
|
|
|
char tmp[4];
|
|
|
|
|
k = wctomb_utf8(tmp, c);
|
|
|
|
|
if (*outb < k) goto toobig;
|
|
|
|
|
memcpy(*out, tmp, k);
|
|
|
|
|
} else k = wctomb_utf8(*out, c);
|
|
|
|
|
*out += k;
|
|
|
|
|
*outb -= k;
|
|
|
|
|
break;
|
|
|
|
|
case US_ASCII:
|
|
|
|
|
if (c > 0x7f) subst: x++, c='*';
|
|
|
|
|
default:
|
|
|
|
|
if (*outb < 1) goto toobig;
|
|
|
|
|
if (c < 128+totype) {
|
|
|
|
|
revout:
|
|
|
|
|
*(*out)++ = c;
|
|
|
|
|
*outb -= 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
d = c;
|
|
|
|
|
for (c=0; c<128-totype; c++) {
|
|
|
|
|
if (d == legacy_chars[ tomap[c*5/4]>>2*c%8 |
|
|
|
|
|
tomap[c*5/4+1]<<8-2*c%8 & 1023 ]) {
|
|
|
|
|
c += 128;
|
|
|
|
|
goto revout;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
goto subst;
|
|
|
|
|
case UCS2BE:
|
|
|
|
|
case UCS2LE:
|
|
|
|
|
case UTF_16BE:
|
|
|
|
|
case UTF_16LE:
|
|
|
|
|
if (c < 0x10000 || type-UCS2BE < 2U) {
|
|
|
|
|
if (c >= 0x10000) c = 0xFFFD;
|
|
|
|
|
if (*outb < 2) goto toobig;
|
|
|
|
|
put_16((void *)*out, c, totype);
|
|
|
|
|
*out += 2;
|
|
|
|
|
*outb -= 2;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (*outb < 4) goto toobig;
|
|
|
|
|
c -= 0x10000;
|
|
|
|
|
put_16((void *)*out, (c>>10)|0xd800, totype);
|
|
|
|
|
put_16((void *)(*out + 2), (c&0x3ff)|0xdc00, totype);
|
|
|
|
|
*out += 4;
|
|
|
|
|
*outb -= 4;
|
|
|
|
|
break;
|
|
|
|
|
case UTF_32BE:
|
|
|
|
|
case UTF_32LE:
|
|
|
|
|
if (*outb < 4) goto toobig;
|
|
|
|
|
put_32((void *)*out, c, totype);
|
|
|
|
|
*out += 4;
|
|
|
|
|
*outb -= 4;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return x;
|
|
|
|
|
ilseq:
|
|
|
|
|
err = EILSEQ;
|
|
|
|
|
x = -1;
|
|
|
|
|
goto end;
|
|
|
|
|
toobig:
|
|
|
|
|
err = E2BIG;
|
|
|
|
|
x = -1;
|
|
|
|
|
goto end;
|
|
|
|
|
starved:
|
|
|
|
|
err = EINVAL;
|
|
|
|
|
x = -1;
|
|
|
|
|
end:
|
|
|
|
|
errno = err;
|
|
|
|
|
return x;
|
|
|
|
|
}
|
