| #include <iconv.h> |
| #include <errno.h> |
| #include <wchar.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <limits.h> |
| #include <stdint.h> |
| #include "locale_impl.h" |
| |
| #define UTF_32BE 0300 |
| #define UTF_16LE 0301 |
| #define UTF_16BE 0302 |
| #define UTF_32LE 0303 |
| #define UCS2BE 0304 |
| #define UCS2LE 0305 |
| #define WCHAR_T 0306 |
| #define US_ASCII 0307 |
| #define UTF_8 0310 |
| #define EUC_JP 0320 |
| #define SHIFT_JIS 0321 |
| #define ISO2022_JP 0322 |
| #define GB18030 0330 |
| #define GBK 0331 |
| #define GB2312 0332 |
| #define BIG5 0340 |
| #define EUC_KR 0350 |
| |
| /* Definitions of charmaps. Each charmap consists of: |
| * 1. Empty-string-terminated list of null-terminated aliases. |
| * 2. Special type code or number of elided entries. |
| * 3. Character table (size determined by field 2). */ |
| |
| static const unsigned char charmaps[] = |
| "utf8\0char\0\0\310" |
| "wchart\0\0\306" |
| "ucs2\0ucs2be\0\0\304" |
| "ucs2le\0\0\305" |
| "utf16\0utf16be\0\0\302" |
| "utf16le\0\0\301" |
| "ucs4\0ucs4be\0utf32\0utf32be\0\0\300" |
| "ucs4le\0utf32le\0\0\303" |
| "ascii\0usascii\0iso646\0iso646us\0\0\307" |
| "eucjp\0\0\320" |
| "shiftjis\0sjis\0\0\321" |
| "iso2022jp\0\0\322" |
| "gb18030\0\0\330" |
| "gbk\0\0\331" |
| "gb2312\0\0\332" |
| "big5\0bigfive\0cp950\0big5hkscs\0\0\340" |
| "euckr\0ksc5601\0ksx1001\0cp949\0\0\350" |
| #include "codepages.h" |
| ; |
| |
| static const unsigned short legacy_chars[] = { |
| #include "legacychars.h" |
| }; |
| |
| static const unsigned short jis0208[84][94] = { |
| #include "jis0208.h" |
| }; |
| |
| static const unsigned short gb18030[126][190] = { |
| #include "gb18030.h" |
| }; |
| |
| static const unsigned short big5[89][157] = { |
| #include "big5.h" |
| }; |
| |
| static const unsigned short hkscs[] = { |
| #include "hkscs.h" |
| }; |
| |
| static const unsigned short ksc[93][94] = { |
| #include "ksc.h" |
| }; |
| |
| static int fuzzycmp(const unsigned char *a, const unsigned char *b) |
| { |
| for (; *a && *b; a++, b++) { |
| while (*a && (*a|32U)-'a'>26 && *a-'0'>10U) a++; |
| if ((*a|32U) != *b) return 1; |
| } |
| return *a != *b; |
| } |
| |
| static size_t find_charmap(const void *name) |
| { |
| const unsigned char *s; |
| if (!*(char *)name) name=charmaps; /* "utf8" */ |
| for (s=charmaps; *s; ) { |
| if (!fuzzycmp(name, s)) { |
| for (; *s; s+=strlen((void *)s)+1); |
| return s+1-charmaps; |
| } |
| s += strlen((void *)s)+1; |
| if (!*s) { |
| if (s[1] > 0200) s+=2; |
| else s+=2+(128U-s[1])/4*5; |
| } |
| } |
| return -1; |
| } |
| |
| struct stateful_cd { |
| iconv_t base_cd; |
| unsigned state; |
| }; |
| |
| static iconv_t combine_to_from(size_t t, size_t f) |
| { |
| return (void *)(f<<16 | t<<1 | 1); |
| } |
| |
| static size_t extract_from(iconv_t cd) |
| { |
| return (size_t)cd >> 16; |
| } |
| |
| static size_t extract_to(iconv_t cd) |
| { |
| return (size_t)cd >> 1 & 0x7fff; |
| } |
| |
| iconv_t iconv_open(const char *to, const char *from) |
| { |
| size_t f, t; |
| struct stateful_cd *scd; |
| |
| if ((t = find_charmap(to))==-1 |
| || (f = find_charmap(from))==-1 |
| || (charmaps[t] >= 0320)) { |
| errno = EINVAL; |
| return (iconv_t)-1; |
| } |
| iconv_t cd = combine_to_from(t, f); |
| |
| switch (charmaps[f]) { |
| case ISO2022_JP: |
| scd = malloc(sizeof *scd); |
| if (!scd) return (iconv_t)-1; |
| scd->base_cd = cd; |
| scd->state = 0; |
| cd = (iconv_t)scd; |
| } |
| |
| return cd; |
| } |
| |
| static unsigned get_16(const unsigned char *s, int e) |
| { |
| e &= 1; |
| return s[e]<<8 | s[1-e]; |
| } |
| |
| static void put_16(unsigned char *s, unsigned c, int e) |
| { |
| e &= 1; |
| s[e] = c>>8; |
| s[1-e] = c; |
| } |
| |
| static unsigned get_32(const unsigned char *s, int e) |
| { |
| e &= 3; |
| return s[e]+0U<<24 | s[e^1]<<16 | s[e^2]<<8 | s[e^3]; |
| } |
| |
| static void put_32(unsigned char *s, unsigned c, int e) |
| { |
| e &= 3; |
| s[e^0] = c>>24; |
| s[e^1] = c>>16; |
| s[e^2] = c>>8; |
| s[e^3] = c; |
| } |
| |
| /* Adapt as needed */ |
| #define mbrtowc_utf8 mbrtowc |
| #define wctomb_utf8 wctomb |
| |
| static unsigned legacy_map(const unsigned char *map, unsigned c) |
| { |
| unsigned x = c - 128 - map[-1]; |
| x = legacy_chars[ map[x*5/4]>>2*x%8 | |
| map[x*5/4+1]<<8-2*x%8 & 1023 ]; |
| return x ? x : c; |
| } |
| |
| size_t iconv(iconv_t cd, char **restrict in, size_t *restrict inb, char **restrict out, size_t *restrict outb) |
| { |
| size_t x=0; |
| struct stateful_cd *scd=0; |
| if (!((size_t)cd & 1)) { |
| scd = (void *)cd; |
| cd = scd->base_cd; |
| } |
| unsigned to = extract_to(cd); |
| unsigned from = extract_from(cd); |
| const unsigned char *map = charmaps+from+1; |
| const unsigned char *tomap = charmaps+to+1; |
| mbstate_t st = {0}; |
| wchar_t wc; |
| unsigned c, d; |
| size_t k, l; |
| int err; |
| unsigned char type = map[-1]; |
| unsigned char totype = tomap[-1]; |
| locale_t *ploc = &CURRENT_LOCALE, loc = *ploc; |
| |
| if (!in || !*in || !*inb) return 0; |
| |
| *ploc = UTF8_LOCALE; |
| |
| for (; *inb; *in+=l, *inb-=l) { |
| c = *(unsigned char *)*in; |
| l = 1; |
| |
| switch (type) { |
| case UTF_8: |
| if (c < 128) break; |
| l = mbrtowc_utf8(&wc, *in, *inb, &st); |
| if (l == (size_t)-1) goto ilseq; |
| if (l == (size_t)-2) goto starved; |
| c = wc; |
| break; |
| case US_ASCII: |
| if (c >= 128) goto ilseq; |
| break; |
| case WCHAR_T: |
| l = sizeof(wchar_t); |
| if (*inb < l) goto starved; |
| c = *(wchar_t *)*in; |
| if (0) { |
| case UTF_32BE: |
| case UTF_32LE: |
| l = 4; |
| if (*inb < 4) goto starved; |
| c = get_32((void *)*in, type); |
| } |
| if (c-0xd800u < 0x800u || c >= 0x110000u) goto ilseq; |
| break; |
| case UCS2BE: |
| case UCS2LE: |
| case UTF_16BE: |
| case UTF_16LE: |
| l = 2; |
| if (*inb < 2) goto starved; |
| c = get_16((void *)*in, type); |
| if ((unsigned)(c-0xdc00) < 0x400) goto ilseq; |
| if ((unsigned)(c-0xd800) < 0x400) { |
| if (type-UCS2BE < 2U) goto ilseq; |
| l = 4; |
| if (*inb < 4) goto starved; |
| d = get_16((void *)(*in + 2), type); |
| if ((unsigned)(d-0xdc00) >= 0x400) goto ilseq; |
| c = ((c-0xd7c0)<<10) + (d-0xdc00); |
| } |
| break; |
| case SHIFT_JIS: |
| if (c < 128) break; |
| if (c-0xa1 <= 0xdf-0xa1) { |
| c += 0xff61-0xa1; |
| break; |
| } |
| l = 2; |
| if (*inb < 2) goto starved; |
| d = *((unsigned char *)*in + 1); |
| if (c-129 <= 159-129) c -= 129; |
| else if (c-224 <= 239-224) c -= 193; |
| else goto ilseq; |
| c *= 2; |
| if (d-64 <= 158-64) { |
| if (d==127) goto ilseq; |
| if (d>127) d--; |
| d -= 64; |
| } else if (d-159 <= 252-159) { |
| c++; |
| d -= 159; |
| } |
| c = jis0208[c][d]; |
| if (!c) goto ilseq; |
| break; |
| case EUC_JP: |
| if (c < 128) break; |
| l = 2; |
| if (*inb < 2) goto starved; |
| d = *((unsigned char *)*in + 1); |
| if (c==0x8e) { |
| c = d; |
| if (c-0xa1 > 0xdf-0xa1) goto ilseq; |
| c += 0xff61 - 0xa1; |
| break; |
| } |
| c -= 0xa1; |
| d -= 0xa1; |
| if (c >= 84 || d >= 94) goto ilseq; |
| c = jis0208[c][d]; |
| if (!c) goto ilseq; |
| break; |
| case ISO2022_JP: |
| if (c >= 128) goto ilseq; |
| if (c == '\033') { |
| l = 3; |
| if (*inb < 3) goto starved; |
| c = *((unsigned char *)*in + 1); |
| d = *((unsigned char *)*in + 2); |
| if (c != '(' && c != '$') goto ilseq; |
| switch (128*(c=='$') + d) { |
| case 'B': scd->state=0; continue; |
| case 'J': scd->state=1; continue; |
| case 'I': scd->state=4; continue; |
| case 128+'@': scd->state=2; continue; |
| case 128+'B': scd->state=3; continue; |
| } |
| goto ilseq; |
| } |
| switch (scd->state) { |
| case 1: |
| if (c=='\\') c = 0xa5; |
| if (c=='~') c = 0x203e; |
| break; |
| case 2: |
| case 3: |
| l = 2; |
| if (*inb < 2) goto starved; |
| d = *((unsigned char *)*in + 1); |
| c -= 0x21; |
| d -= 0x21; |
| if (c >= 84 || d >= 94) goto ilseq; |
| c = jis0208[c][d]; |
| if (!c) goto ilseq; |
| break; |
| case 4: |
| if (c-0x60 < 0x1f) goto ilseq; |
| if (c-0x21 < 0x5e) c += 0xff61-0x21; |
| break; |
| } |
| break; |
| case GB2312: |
| if (c < 128) break; |
| if (c < 0xa1) goto ilseq; |
| case GBK: |
| case GB18030: |
| if (c < 128) break; |
| 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); |
| 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: |
| if (c < 128) break; |
| 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; |
| 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(combine_to_from(to, 0), |
| &(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: |
| if (c < 128) break; |
| 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 = legacy_map(map, c); |
| 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 || (c<256 && c==legacy_map(tomap, c))) { |
| revout: |
| *(*out)++ = c; |
| *outb -= 1; |
| break; |
| } |
| d = c; |
| for (c=128+totype; c<256; c++) { |
| if (d == legacy_map(tomap, c)) { |
| 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; |
| } |
| } |
| *ploc = loc; |
| return x; |
| ilseq: |
| err = EILSEQ; |
| x = -1; |
| goto end; |
| toobig: |
| err = E2BIG; |
| x = -1; |
| goto end; |
| starved: |
| err = EINVAL; |
| x = -1; |
| end: |
| errno = err; |
| *ploc = loc; |
| return x; |
| } |