+++ /dev/null
-#include <iconv.h>
-#include <errno.h>
-#include <wchar.h>
-#include <string.h>
-#include <strings.h>
-#include <stdlib.h>
-#include <limits.h>
-
-#include <dirent.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdint.h>
-
-/* builtin charmaps */
-#include "charmaps.h"
-
-/* only 0-7 are valid as dest charset */
-#define UTF_16BE 000
-#define UTF_16LE 001
-#define UTF_32BE 002
-#define UTF_32LE 003
-#define WCHAR_T 004
-#define UTF_8 005
-#define US_ASCII 006
-#define LATIN_1 007
-
-/* additional charsets with algorithmic conversion */
-#define LATIN_9 010
-#define TIS_620 011
-#define JIS_0201 012
-
-/* some programs like php need this */
-int _libiconv_version = _LIBICONV_VERSION;
-
-/* these must match the constants above */
-static const unsigned char charsets[] =
- "\005" "UTF-8" "\0"
- "\004" "WCHAR_T" "\0"
- "\000" "UTF-16BE" "\0"
- "\001" "UTF-16LE" "\0"
- "\002" "UTF-32BE" "\0"
- "\003" "UTF-32LE" "\0"
- "\006" "ASCII" "\0"
- "\006" "US-ASCII" "\0"
- "\006" "ISO646-US" "\0"
- "\006" "ISO_646.IRV:1991" "\0"
- "\006" "ISO-IR-6" "\0"
- "\006" "ANSI_X3.4-1968" "\0"
- "\006" "ANSI_X3.4-1986" "\0"
- "\006" "CP367" "\0"
- "\006" "IBM367" "\0"
- "\006" "US" "\0"
- "\006" "CSASCII" "\0"
- "\007" "ISO-8859-1" "\0"
- "\007" "LATIN1" "\0"
- "\010" "ISO-8859-15""\0"
- "\010" "LATIN9" "\0"
- "\011" "ISO-8859-11""\0"
- "\011" "TIS-620" "\0"
- "\012" "JIS-0201" "\0"
- "\377";
-
-/* separate identifiers for sbcs/dbcs/etc map type */
-#define UCS2_8BIT 000
-#define UCS3_8BIT 001
-#define EUC 002
-#define EUC_TW 003
-#define SHIFT_JIS 004
-#define BIG5 005
-#define GBK 006
-
-/* FIXME: these are not implemented yet
-// EUC: A1-FE A1-FE
-// GBK: 81-FE 40-7E,80-FE
-// Big5: A1-FE 40-7E,A1-FE
-*/
-
-static const unsigned short maplen[] = {
- [UCS2_8BIT] = 4+ 2* 128,
- [UCS3_8BIT] = 4+ 3* 128,
- [EUC] = 4+ 2* 94*94,
- [SHIFT_JIS] = 4+ 2* 94*94,
- [BIG5] = 4+ 2* 94*157,
- [GBK] = 4+ 2* 126*190,
- [EUC_TW] = 4+ 2* 2*94*94,
-};
-
-static int find_charmap(const char *name)
-{
- int i;
- for (i = 0; i < (sizeof(charmaps) / sizeof(charmaps[0])); i++)
- if (!strcasecmp(charmaps[i].name, name))
- return i;
- return -1;
-}
-
-static int find_charset(const char *name)
-{
- const unsigned char *s;
- for (s=charsets; *s<0xff && strcasecmp(s+1, name); s+=strlen(s)+1);
- return *s;
-}
-
-iconv_t iconv_open(const char *to, const char *from)
-{
- unsigned f, t;
- int m;
-
- if ((t = find_charset(to)) > 8)
- return -1;
-
- if ((f = find_charset(from)) < 255)
- return 0 | (t<<1) | (f<<8);
-
- if ((m = find_charmap(from)) > -1)
- return 1 | (t<<1) | (m<<8);
-
- return -1;
-}
-
-int iconv_close(iconv_t cd)
-{
- return 0;
-}
-
-static inline wchar_t get_16(const unsigned char *s, int endian)
-{
- endian &= 1;
- return s[endian]<<8 | s[endian^1];
-}
-
-static inline void put_16(unsigned char *s, wchar_t c, int endian)
-{
- endian &= 1;
- s[endian] = c>>8;
- s[endian^1] = c;
-}
-
-static inline int utf8enc_wchar(char *outb, wchar_t c)
-{
- if (c <= 0x7F) {
- *outb = c;
- return 1;
- }
- else if (c <= 0x7FF) {
- *outb++ = ((c >> 6) & 0x1F) | 0xC0;
- *outb++ = ( c & 0x3F) | 0x80;
- return 2;
- }
- else if (c <= 0xFFFF) {
- *outb++ = ((c >> 12) & 0x0F) | 0xE0;
- *outb++ = ((c >> 6) & 0x3F) | 0x80;
- *outb++ = ( c & 0x3F) | 0x80;
- return 3;
- }
- else if (c <= 0x10FFFF) {
- *outb++ = ((c >> 18) & 0x07) | 0xF0;
- *outb++ = ((c >> 12) & 0x3F) | 0x80;
- *outb++ = ((c >> 6) & 0x3F) | 0x80;
- *outb++ = ( c & 0x3F) | 0x80;
- return 4;
- }
- else {
- *outb++ = '?';
- return 1;
- }
-}
-
-static inline int utf8seq_is_overlong(char *s, int n)
-{
- switch (n)
- {
- case 2:
- /* 1100000x (10xxxxxx) */
- return (((*s >> 1) == 0x60) &&
- ((*(s+1) >> 6) == 0x02));
-
- case 3:
- /* 11100000 100xxxxx (10xxxxxx) */
- return ((*s == 0xE0) &&
- ((*(s+1) >> 5) == 0x04) &&
- ((*(s+2) >> 6) == 0x02));
-
- case 4:
- /* 11110000 1000xxxx (10xxxxxx 10xxxxxx) */
- return ((*s == 0xF0) &&
- ((*(s+1) >> 4) == 0x08) &&
- ((*(s+2) >> 6) == 0x02) &&
- ((*(s+3) >> 6) == 0x02));
- }
-
- return 0;
-}
-
-static inline int utf8seq_is_surrogate(char *s, int n)
-{
- return ((n == 3) && (*s == 0xED) && (*(s+1) >= 0xA0) && (*(s+1) <= 0xBF));
-}
-
-static inline int utf8seq_is_illegal(char *s, int n)
-{
- return ((n == 3) && (*s == 0xEF) && (*(s+1) == 0xBF) &&
- (*(s+2) >= 0xBE) && (*(s+2) <= 0xBF));
-}
-
-static inline int utf8dec_wchar(wchar_t *c, unsigned char *in, size_t inb)
-{
- int i;
- int n = -1;
-
- /* trivial char */
- if (*in <= 0x7F) {
- *c = *in;
- return 1;
- }
-
- /* find utf8 sequence length */
- if ((*in & 0xE0) == 0xC0) n = 2;
- else if ((*in & 0xF0) == 0xE0) n = 3;
- else if ((*in & 0xF8) == 0xF0) n = 4;
- else if ((*in & 0xFC) == 0xF8) n = 5;
- else if ((*in & 0xFE) == 0xFC) n = 6;
-
- /* starved? */
- if (n > inb)
- return -2;
-
- /* decode ... */
- if (n > 1 && n < 5) {
- /* reject invalid sequences */
- if (utf8seq_is_overlong(in, n) ||
- utf8seq_is_surrogate(in, n) ||
- utf8seq_is_illegal(in, n))
- return -1;
-
- /* decode ... */
- *c = (char)(*in++ & (0x7F >> n));
-
- for (i = 1; i < n; i++) {
- /* illegal continuation byte */
- if (*in < 0x80 || *in > 0xBF)
- return -1;
-
- *c = (*c << 6) | (*in++ & 0x3F);
- }
-
- return n;
- }
-
- /* unmapped sequence (> 4) */
- return -1;
-}
-
-static inline wchar_t latin9_translit(wchar_t c)
-{
- /* a number of trivial iso-8859-15 <> utf-8 transliterations */
- switch (c) {
- case 0x20AC: return 0xA4; /* Euro */
- case 0x0160: return 0xA6; /* S caron */
- case 0x0161: return 0xA8; /* s caron */
- case 0x017D: return 0xB4; /* Z caron */
- case 0x017E: return 0xB8; /* z caron */
- case 0x0152: return 0xBC; /* OE */
- case 0x0153: return 0xBD; /* oe */
- case 0x0178: return 0xBE; /* Y diaeresis */
- default: return 0xFFFD; /* cannot translate */
- }
-}
-
-size_t iconv(iconv_t cd, char **in, size_t *inb, char **out, size_t *outb)
-{
- size_t x=0;
- unsigned char to = (cd>>1)&127;
- unsigned char from = 255;
- const unsigned char *map = 0;
- char tmp[MB_LEN_MAX];
- wchar_t c, d;
- size_t k, l;
- int err;
-
- if (!in || !*in || !*inb) return 0;
-
- if (cd & 1)
- map = charmaps[cd>>8].map;
- else
- from = cd>>8;
-
- for (; *inb; *in+=l, *inb-=l) {
- c = *(unsigned char *)*in;
- l = 1;
- if (from >= UTF_8 && c < 0x80) goto charok;
- switch (from) {
- case WCHAR_T:
- l = sizeof(wchar_t);
- if (*inb < l) goto starved;
- c = *(wchar_t *)*in;
- break;
- case UTF_8:
- l = utf8dec_wchar(&c, *in, *inb);
- if (!l) l++;
- else if (l == (size_t)-1) goto ilseq;
- else if (l == (size_t)-2) goto starved;
- break;
- case US_ASCII:
- goto ilseq;
- case LATIN_9:
- if ((unsigned)c - 0xa4 <= 0xbe - 0xa4) {
- static const unsigned char map[] = {
- 0, 0x60, 0, 0x61, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0x7d, 0, 0, 0, 0x7e, 0, 0, 0,
- 0x52, 0x53, 0x78
- };
- if (c == 0xa4) c = 0x20ac;
- else if (map[c-0xa5]) c = 0x100 | map[c-0xa5];
- }
- case LATIN_1:
- goto charok;
- case TIS_620:
- if (c >= 0xa1) c += 0x0e01-0xa1;
- goto charok;
- case JIS_0201:
- if (c >= 0xa1) {
- if (c <= 0xdf) c += 0xff61-0xa1;
- else goto ilseq;
- }
- goto charok;
- case UTF_16BE:
- case UTF_16LE:
- l = 2;
- if (*inb < 2) goto starved;
- c = get_16(*in, from);
- if ((unsigned)(c-0xdc00) < 0x400) goto ilseq;
- if ((unsigned)(c-0xd800) < 0x400) {
- l = 4;
- if (*inb < 4) goto starved;
- d = get_16(*in + 2, from);
- if ((unsigned)(c-0xdc00) >= 0x400) goto ilseq;
- c = ((c-0xd800)<<10) | (d-0xdc00);
- }
- break;
- case UTF_32BE:
- case UTF_32LE:
- l = 4;
- if (*inb < 4) goto starved;
- // FIXME
- // c = get_32(*in, from);
- break;
- default:
- /* only support ascii supersets */
- if (c < 0x80) break;
- switch (map[0]) {
- case UCS2_8BIT:
- c -= 0x80;
- break;
- case EUC:
- if ((unsigned)c - 0xa1 >= 94) goto ilseq;
- if ((unsigned)in[0][1] - 0xa1 >= 94) goto ilseq;
- c = (c-0xa1)*94 + (in[0][1]-0xa1);
- l = 2;
- break;
- case SHIFT_JIS:
- if ((unsigned)c - 0xa1 <= 0xdf-0xa1) {
- c += 0xff61-0xa1;
- goto charok;
- }
- // FIXME...
- l = 2;
- break;
- default:
- goto badf;
- }
- c = get_16(map + 4 + 2*c, 0);
- if (c == 0xffff) goto ilseq;
- goto charok;
- }
-
- if ((unsigned)c - 0xd800 < 0x800 || (unsigned)c >= 0x110000)
- goto ilseq;
-charok:
- switch (to) {
- 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) {
- k = utf8enc_wchar(tmp, c);
- if (*outb < k) goto toobig;
- memcpy(*out, tmp, k);
- } else k = utf8enc_wchar(*out, c);
- *out += k;
- *outb -= k;
- break;
- case US_ASCII:
- if (c > 0x7f) c = 0xfffd;
- /* fall thru and count replacement in latin1 case */
- case LATIN_9:
- if (c >= 0x100 && c != 0xfffd)
- c = latin9_translit(c);
- /* fall through */
- case LATIN_1:
- if (c > 0xff) goto ilseq;
- if (!*outb) goto toobig;
- **out = c;
- ++*out;
- --*outb;
- break;
- case UTF_16BE:
- case UTF_16LE:
- if (c < 0x10000) {
- if (*outb < 2) goto toobig;
- put_16(*out, c, to);
- *out += 2;
- *outb -= 2;
- break;
- }
- if (*outb < 4) goto toobig;
- put_16(*out, (c>>10)|0xd800, to);
- put_16(*out + 2, (c&0x3ff)|0xdc00, to);
- *out += 4;
- *outb -= 4;
- break;
- default:
- goto badf;
- }
- }
- return x;
-ilseq:
- err = EILSEQ;
- x = -1;
- goto end;
-badf:
- err = EBADF;
- x = -1;
- goto end;
-toobig:
- err = E2BIG;
- x = -1;
- goto end;
-starved:
- err = EINVAL;
-end:
- errno = err;
- return x;
-}
projects / openwrt / staging / wigyori.git / blobdiff