/* * Program: UTF-8 routines * * Author: Mark Crispin * Networks and Distributed Computing * Computing & Communications * University of Washington * Administration Building, AG-44 * Seattle, WA 98195 * Internet: MRC@CAC.Washington.EDU * * Date: 11 June 1997 * Last Edited: 26 July 1998 * * Copyright 1998 by the University of Washington * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose and without fee is hereby granted, provided * that the above copyright notices appear in all copies and that both the * above copyright notices and this permission notice appear in supporting * documentation, and that the name of the University of Washington not be * used in advertising or publicity pertaining to distribution of the software * without specific, written prior permission. This software is made * available "as is", and * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL, * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #include #include #include "mail.h" #include "osdep.h" #include "misc.h" #include "rfc822.h" #include "utf8.h" /* *** IMPORTANT *** * * There is a very important difference between "character set" and "charset", * and the comments in this file reflect these differences. A "character set" * (also known as "coded character set") is a mapping between codepoints and * characters. A "charset" is as defined in MIME, and incorporates one or more * coded character sets in a character encoding scheme. See RFC 2130 for more * details. */ /* Character set conversion tables */ #include "iso_8859.c" /* 8-bit single-byte coded graphic */ #include "koi8_r.c" /* Cyrillic - Russia */ #include "koi8_u.c" /* Cyrillic - Ukraine */ #include "tis_620.c" /* Thai */ #include "viscii.c" /* Vietnamese */ #include "gb_2312.c" /* Chinese (PRC) - simplified */ #include "gb_12345.c" /* Chinese (PRC) - traditional */ #include "jis_0208.c" /* Japanese - basic */ #include "jis_0212.c" /* Japanese - supplementary */ #include "ksc_5601.c" /* Korean */ #include "big5.c" /* Taiwanese (ROC) - industrial standard */ #include "cns11643.c" /* Taiwanese (ROC) - national standard */ #if 0 /* no charset accesses this table */ #include "cns-14.c" /* plane 14 of CNS 11643 */ #endif /* EUC parameters */ #ifdef GBTOUNICODE /* PRC simplified Chinese */ static const struct utf8_eucparam gb_param[] = { {BASE_GB2312_KU,BASE_GB2312_TEN,MAX_GB2312_KU,MAX_GB2312_TEN, (void *) gb2312tab}, {0,0,0,0,NIL}, {0,0,0,0,NIL}, }; #endif #ifdef GB12345TOUNICODE /* PRC traditional Chinese */ static const struct utf8_eucparam gbt_param[] = { {BASE_GB12345_KU,BASE_GB12345_TEN,MAX_GB12345_KU,MAX_GB12345_TEN, (void *) gb12345tab}, {0,0,0,0,NIL}, {0,0,0,0,NIL} }; #endif #ifdef BIG5TOUNICODE /* ROC traditional Chinese */ static const struct utf8_eucparam big5_param[] = { {BASE_BIG5_KU,BASE_BIG5_TEN_0,MAX_BIG5_KU,MAX_BIG5_TEN_0,(void *) big5tab}, {BASE_BIG5_KU,BASE_BIG5_TEN_1,MAX_BIG5_KU,MAX_BIG5_TEN_1,NIL} }; #endif #ifdef JISTOUNICODE /* Japanese */ static const struct utf8_eucparam jis_param[] = { {BASE_JIS0208_KU,BASE_JIS0208_TEN,MAX_JIS0208_KU,MAX_JIS0208_TEN, (void *) jis0208tab}, {MIN_KANA_8,0,MAX_KANA_8,0,(void *) KANA_8}, #ifdef JIS0212TOUNICODE /* Japanese extended */ {BASE_JIS0212_KU,BASE_JIS0212_TEN,MAX_JIS0212_KU,MAX_JIS0212_TEN, (void *) jis0212tab} #else {0,0,0,0,NIL} #endif }; #endif #ifdef KSCTOUNICODE /* Korean */ static const struct utf8_eucparam ksc_param = { BASE_KSC5601_KU,BASE_KSC5601_TEN,MAX_KSC5601_KU,MAX_KSC5601_TEN,(void *) ksc5601tab}; #endif /* List of supported charsets (note: all names must be uppercase!) */ static const struct utf8_csent utf8_csvalid[] = { {"US-ASCII",NIL,NIL},{"UTF-8",NIL,NIL}, {"ISO-8859-1",utf8_text_8859_1,NIL}, {"ISO-8859-2",utf8_text_1byte,(void *) iso8859_2tab}, {"ISO-8859-3",utf8_text_1byte,(void *) iso8859_3tab}, {"ISO-8859-4",utf8_text_1byte,(void *) iso8859_4tab}, {"ISO-8859-5",utf8_text_1byte,(void *) iso8859_5tab}, {"ISO-8859-6",utf8_text_1byte,(void *) iso8859_6tab}, {"ISO-8859-7",utf8_text_1byte,(void *) iso8859_7tab}, {"ISO-8859-8",utf8_text_1byte,(void *) iso8859_8tab}, {"ISO-8859-9",utf8_text_1byte,(void *) iso8859_9tab}, {"ISO-8859-10",utf8_text_1byte,(void *) iso8859_10tab}, {"ISO-8859-13",utf8_text_1byte,(void *) iso8859_13tab}, {"ISO-8859-15",utf8_text_1byte,(void *) iso8859_15tab}, #ifdef GBTOUNICODE {"GB2312",utf8_text_euc,(void *) gb_param}, {"CN-GB",utf8_text_euc,(void *) gb_param}, #ifdef CNS1TOUNICODE {"ISO-2022-CN",utf8_text_2022,NIL}, #endif #endif #ifdef GB12345TOUNICODE {"CN-GB-12345",utf8_text_euc,(void *) gbt_param}, #endif #ifdef BIG5TOUNICODE {"BIG5",utf8_text_dbyte2,(void *) big5_param}, {"CN-BIG5",utf8_text_dbyte2,(void *) big5_param}, #endif #ifdef JISTOUNICODE {"ISO-2022-JP",utf8_text_2022,NIL}, {"EUC-JP",utf8_text_euc,(void *) jis_param}, {"SHIFT_JIS",utf8_text_sjis,NIL},{"SHIFT-JIS",utf8_text_sjis,NIL}, #ifdef JIS0212TOUNICODE {"ISO-2022-JP-1",utf8_text_2022,NIL}, #ifdef GBTOUNICODE #ifdef KSCTOUNICODE {"ISO-2022-JP-2",utf8_text_2022,NIL}, #endif #endif #endif #endif #ifdef KSCTOUNICODE {"ISO-2022-KR",utf8_text_2022,NIL}, {"EUC-KR",utf8_text_dbyte,(void *) &ksc_param}, #endif {"KOI8-R",utf8_text_1byte,(void *) koi8rtab}, {"KOI8-U",utf8_text_1byte,(void *) koi8utab}, {"KOI8-RU",utf8_text_1byte,(void *) koi8utab}, {"TIS-620",utf8_text_1byte,(void *) tis620tab}, {"VISCII",utf8_text_1byte8,(void *) visciitab}, NIL }; /* Convert charset labelled sized text to UTF-8 * Accepts: source sized text * charset * pointer to returned sized text if non-NIL * flags (currently non-zero if want error for unknown charset) * Returns: T if successful, NIL if failure */ long utf8_text (SIZEDTEXT *text,char *charset,SIZEDTEXT *ret,long flags) { unsigned long i; char *t,tmp[MAILTMPLEN]; if (ret) { /* default is to just return identity */ ret->data = text->data; ret->size = text->size; } if (!charset || !*charset) { /* missing charset? */ if (ret && (text->size > 2)) for (i = 0; i < text->size - 1; i++) { /* special hack for untagged ISO-2022 */ if ((text->data[i] == '\033') && (text->data[i+1] == '$')) { utf8_text_2022 (text,ret,NIL); break; } /* special hack for "just send 8" cretins */ else if (text->data[i] & BIT8) { utf8_text_8859_1 (text,ret,NIL); break; } } return LONGT; } /* otherwise look for charset */ for (i = 0, ucase (strcpy (tmp,charset)); utf8_csvalid[i].name; i++) if (!strcmp (tmp,utf8_csvalid[i].name)) { if (ret && utf8_csvalid[i].dsp) (*utf8_csvalid[i].dsp) (text,ret,utf8_csvalid[i].tab); return LONGT; /* success */ } if (flags) { /* charset not found */ strcpy (tmp,"[BADCHARSET ("); for (i = 0, t = tmp + strlen (tmp); utf8_csvalid[i].name; i++,t += strlen (t)) sprintf (t,"%s ",utf8_csvalid[i].name); sprintf (t + strlen (t) - 1,")] Unknown charset: %.80s",charset); mm_log (tmp,ERROR); } return NIL; /* failed */ } /* Convert ISO-8859-1 sized text to UTF-8 * Accepts: source sized text * pointer to returned sized text * conversion table */ void utf8_text_8859_1 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int c; for (ret->size = i = 0; i < text->size; ret->size += (text->data[i++] & BIT8) ? 2 : 1); s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = 0; i < text->size;) { if ((c = text->data[i++]) & BIT8) { *s++ = 0xc0 | ((c >> 6) & 0x3f); *s++ = BIT8 | (c & 0x3f); } else *s++ = c; /* ASCII character */ } } /* Convert single byte ASCII+8bit character set sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * conversion table */ void utf8_text_1byte (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int c; unsigned short *tbl = (unsigned short *) tab; for (ret->size = i = 0; i < text->size; ret->size += UTF8_SIZE (c)) if ((c = text->data[i++]) & BIT8) c = tbl[c & BITS7]; s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = 0; i < text->size;) { if ((c = text->data[i++]) & BIT8) c = tbl[c & BITS7]; UTF8_PUT (s,c) /* convert Unicode to UTF-8 */ } } /* Convert single byte 8bit character set sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * conversion table */ void utf8_text_1byte8 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int c; unsigned short *tbl = (unsigned short *) tab; for (ret->size = i = 0; i < text->size; ret->size += UTF8_SIZE (c)) c = tbl[text->data[i++]]; s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = 0; i < text->size;) { c = tbl[text->data[i++]]; UTF8_PUT (s,c) /* convert Unicode to UTF-8 */ } } /* Convert EUC sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * EUC parameter table */ void utf8_text_euc (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int pass,c,c1,ku,ten; struct utf8_eucparam *p1 = (struct utf8_eucparam *) tab; struct utf8_eucparam *p2 = p1 + 1; struct utf8_eucparam *p3 = p1 + 2; unsigned short *t1 = (unsigned short *) p1->tab; unsigned short *t2 = (unsigned short *) p2->tab; unsigned short *t3 = (unsigned short *) p3->tab; for (pass = 0,ret->size = 0; pass <= 1; pass++) { for (i = 0; i < text->size;) { /* not CS0? */ if ((c = text->data[i++]) & BIT8) { /* yes, must have another high byte */ if ((i >= text->size) || !((c1 = text->data[i++]) & BIT8)) c = BOGON; /* out of space or bogon */ else switch (c) { /* check 8bit code set */ case EUC_CS2: /* CS2 */ if (p2->base_ku) { /* CS2 set up? */ if (p2->base_ten) /* yes, multibyte? */ c = ((i < text->size) && ((c = text->data[i++]) & BIT8) && ((ku = (c1 & BITS7) - p2->base_ku) < p2->max_ku) && ((ten = (c & BITS7) - p2->base_ten) < p2->max_ten)) ? t2[(ku*p2->max_ten) + ten] : BOGON; else c = ((c1 >= p2->base_ku) && (c1 <= p2->max_ku)) ? c1 + ((unsigned int) p2->tab) : BOGON; } else { /* CS2 not set up */ c = BOGON; /* swallow byte, say bogon */ if (i < text->size) i++; } break; case EUC_CS3: /* CS3 */ if (p3->base_ku) { /* CS3 set up? */ if (p3->base_ten) /* yes, multibyte? */ c = ((i < text->size) && ((c = text->data[i++]) & BIT8) && ((ku = (c1 & BITS7) - p3->base_ku) < p3->max_ku) && ((ten = (c & BITS7) - p3->base_ten) < p3->max_ten)) ? t3[(ku*p3->max_ten) + ten] : BOGON; else c = ((c1 >= p3->base_ku) && (c1 <= p3->max_ku)) ? c1 + ((unsigned int) p3->tab) : BOGON; } else { /* CS3 not set up */ c = BOGON; /* swallow byte, say bogon */ if (i < text->size) i++; } break; default: c = (((ku = (c & BITS7) - p1->base_ku) < p1->max_ku) && ((ten = (c1 & BITS7) - p1->base_ten) < p1->max_ten)) ? t1[(ku*p1->max_ten) + ten] : BOGON; /* special hack for JIS X 0212: merge rows less than 10 */ if (!c && ku && (ku < 10) && t3 && p3->base_ten) c = t3[((ku - (p3->base_ku - p1->base_ku))*p3->max_ten) + ten]; } } if (pass) UTF8_PUT (s,c) else ret->size += UTF8_SIZE (c); } if (!pass) s = ret->data = (unsigned char *) fs_get (ret->size + 1); } } /* Convert ASCII + double-byte sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * conversion table */ void utf8_text_dbyte (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int c,c1,ku,ten; struct utf8_eucparam *p1 = (struct utf8_eucparam *) tab; unsigned short *t1 = (unsigned short *) p1->tab; for (ret->size = i = 0; i < text->size; ret->size += UTF8_SIZE (c)) if ((c = text->data[i++]) & BIT8) c = ((i < text->size) && (c1 = text->data[i++]) && ((ku = c - p1->base_ku) < p1->max_ku) && ((ten = c1 - p1->base_ten) < p1->max_ten)) ? t1[(ku*p1->max_ten) + ten] : BOGON; s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = 0; i < text->size;) { if ((c = text->data[i++]) & BIT8) c = ((i < text->size) && (c1 = text->data[i++]) && ((ku = c - p1->base_ku) < p1->max_ku) && ((ten = c1 - p1->base_ten) < p1->max_ten)) ? t1[(ku*p1->max_ten) + ten] : BOGON; UTF8_PUT (s,c) /* convert Unicode to UTF-8 */ } } /* Convert ASCII + double byte 2 plane sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * conversion table */ void utf8_text_dbyte2 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i,j; unsigned char *s; unsigned int c,c1,ku,ten; struct utf8_eucparam *p1 = (struct utf8_eucparam *) tab; struct utf8_eucparam *p2 = p1 + 1; unsigned short *t = (unsigned short *) p1->tab; for (ret->size = i = 0; i < text->size; ret->size += UTF8_SIZE (c)) if ((c = text->data[i++]) & BIT8) { if ((i >= text->size) || !(c1 = text->data[i++])) c = BOGON; /* out of space or bogon */ else if (c1 & BIT8) /* high vs. low plane */ c = ((ku = c - p2->base_ku) < p2->max_ku && ((ten = c1 - p2->base_ten) < p2->max_ten)) ? t[(ku*(p1->max_ten + p2->max_ten)) + p1->max_ten + ten] : BOGON; else c = ((ku = c - p1->base_ku) < p1->max_ku && ((ten = c1 - p1->base_ten) < p1->max_ten)) ? t[(ku*(p1->max_ten + p2->max_ten)) + ten] : BOGON; } s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = j = 0; i < text->size;) { if ((c = text->data[i++]) & BIT8) { if ((i >= text->size) || !(c1 = text->data[i++])) c = BOGON; /* out of space or bogon */ else if (c1 & BIT8) /* high vs. low plane */ c = ((ku = c - p2->base_ku) < p2->max_ku && ((ten = c1 - p2->base_ten) < p2->max_ten)) ? t[(ku*(p1->max_ten + p2->max_ten)) + p1->max_ten + ten] : BOGON; else c = ((ku = c - p1->base_ku) < p1->max_ku && ((ten = c1 - p1->base_ten) < p1->max_ten)) ? t[(ku*(p1->max_ten + p2->max_ten)) + ten] : BOGON; } UTF8_PUT (s,c) /* convert Unicode to UTF-8 */ } } #ifdef JISTOUNICODE /* Japanese */ /* Convert Shift JIS sized text to UTF-8 * Accepts: source sized text * pointer to return sized text * conversion table */ void utf8_text_sjis (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int c,c1,ku,ten; for (ret->size = i = 0; i < text->size; ret->size += UTF8_SIZE (c)) if ((c = text->data[i++]) & BIT8) { /* half-width katakana */ if ((c >= MIN_KANA_8) && (c <= MAX_KANA_8)) c += KANA_8; else if (i >= text->size) c = BOGON; else { /* Shift-JIS */ c1 = text->data[i++]; SJISTOJIS (c,c1); c = JISTOUNICODE (c,c1,ku,ten); } } s = ret->data = (unsigned char *) fs_get (ret->size + 1); for (i = 0; i < text->size;) { if ((c = text->data[i++]) & BIT8) { /* half-width katakana */ if ((c >= MIN_KANA_8) && (c <= MAX_KANA_8)) c += KANA_8; else { /* Shift-JIS */ c1 = text->data[i++]; SJISTOJIS (c,c1); c = JISTOUNICODE (c,c1,ku,ten); } } UTF8_PUT (s,c) /* convert Unicode to UTF-8 */ } } #endif /* Convert ISO-2022 sized text to UTF-8 * Accepts: source sized text * pointer to returned sized text * conversion table */ void utf8_text_2022 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab) { unsigned long i; unsigned char *s; unsigned int pass,state,c,co,gi,gl,gr,g[4],ku,ten; for (pass = 0,ret->size = 0; pass <= 1; pass++) { gi = 0; /* quell compiler warnings */ state = I2S_CHAR; /* initialize engine */ g[0]= g[2] = I2CS_ASCII; /* G0 and G2 are ASCII */ g[1]= g[3] = I2CS_ISO8859_1;/* G1 and G3 are ISO-8850-1 */ gl = I2C_G0; gr = I2C_G1; /* left is G0, right is G1 */ for (i = 0; i < text->size;) { c = text->data[i++]; switch (state) { /* dispatch based upon engine state */ case I2S_ESC: /* ESC seen */ switch (c) { /* process intermediate character */ case I2C_MULTI: /* multibyte character? */ state = I2S_MUL; /* mark multibyte flag seen */ break; case I2C_SS2: /* single shift GL to G2 */ case I2C_SS2_ALT: /* Taiwan SeedNet */ gl |= I2C_SG2; break; case I2C_SS3: /* single shift GL to G3 */ case I2C_SS3_ALT: /* Taiwan SeedNet */ gl |= I2C_SG3; break; case I2C_LS2: /* shift GL to G2 */ gl = I2C_G2; break; case I2C_LS3: /* shift GL to G3 */ gl = I2C_G3; break; case I2C_LS1R: /* shift GR to G1 */ gr = I2C_G1; break; case I2C_LS2R: /* shift GR to G2 */ gr = I2C_G2; break; case I2C_LS3R: /* shift GR to G3 */ gr = I2C_G3; break; case I2C_G0_94: case I2C_G1_94: case I2C_G2_94: case I2C_G3_94: g[gi = c - I2C_G0_94] = (state == I2S_MUL) ? I2CS_94x94 : I2CS_94; state = I2S_INT; /* ready for character set */ break; case I2C_G0_96: case I2C_G1_96: case I2C_G2_96: case I2C_G3_96: g[gi = c - I2C_G0_96] = (state == I2S_MUL) ? I2CS_96x96 : I2CS_96; state = I2S_INT; /* ready for character set */ break; default: /* bogon */ if (pass) *s++ = I2C_ESC,*s++ = c; else ret->size += 2; state = I2S_CHAR; /* return to previous state */ } break; case I2S_MUL: /* ESC $ */ switch (c) { /* process multibyte intermediate character */ case I2C_G0_94: case I2C_G1_94: case I2C_G2_94: case I2C_G3_94: g[gi = c - I2C_G0_94] = I2CS_94x94; state = I2S_INT; /* ready for character set */ break; case I2C_G0_96: case I2C_G1_96: case I2C_G2_96: case I2C_G3_96: g[gi = c - I2C_G0_96] = I2CS_96x96; state = I2S_INT; /* ready for character set */ break; default: /* probably omitted I2CS_94x94 */ g[gi = I2C_G0] = I2CS_94x94 | c; state = I2S_CHAR; /* return to character state */ } break; case I2S_INT: state = I2S_CHAR; /* return to character state */ g[gi] |= c; /* set character set */ break; case I2S_CHAR: /* character data */ switch (c) { case I2C_ESC: /* ESC character */ state = I2S_ESC; /* see if ISO-2022 prefix */ break; case I2C_SI: /* shift GL to G0 */ gl = I2C_G0; break; case I2C_SO: /* shift GL to G1 */ gl = I2C_G1; break; case I2C_SS2_ALT: /* single shift GL to G2 */ case I2C_SS2_ALT_7: gl |= I2C_SG2; break; case I2C_SS3_ALT: /* single shift GL to G3 */ case I2C_SS3_ALT_7: gl |= I2C_SG3; break; default: /* ordinary character */ co = c; /* note original character */ if (gl & (3 << 2)) { /* single shifted? */ gi = g[gl >> 2]; /* get shifted character set */ gl &= 0x3; /* cancel shift */ } /* select left or right half */ else gi = (c & BIT8) ? g[gr] : g[gl]; c &= BITS7; /* make 7-bit */ switch (gi) { /* interpret in character set */ case I2CS_ASCII: /* ASCII */ break; /* easy! */ case I2CS_BRITISH: /* British ASCII */ /* Pound sterling sign */ if (c == 0x23) c = UCS2_POUNDSTERLING; break; case I2CS_JIS_ROMAN: /* JIS Roman */ case I2CS_JIS_BUGROM: /* old bugs */ switch (c) { /* two exceptions to ASCII */ case 0x5c: /* Yen sign */ c = UCS2_YEN; break; case 0x7e: /* overline */ c = UCS2_OVERLINE; break; } break; case I2CS_JIS_KANA: /* JIS katakana */ if ((c >= MIN_KANA_7) && (c <= MAX_KANA_7)) c += KANA_7; break; case I2CS_ISO8859_1: /* Latin-1 (West European) */ c |= BIT8; /* just turn on high bit */ break; case I2CS_ISO8859_2: /* Latin-2 (Czech, Slovak) */ c = iso8859_2tab[c]; break; case I2CS_ISO8859_3: /* Latin-3 (Dutch, Turkish) */ c = iso8859_3tab[c]; break; case I2CS_ISO8859_4: /* Latin-4 (Scandinavian) */ c = iso8859_4tab[c]; break; case I2CS_ISO8859_5: /* Cyrillic */ c = iso8859_5tab[c]; break; case I2CS_ISO8859_6: /* Arabic */ c = iso8859_6tab[c]; break; case I2CS_ISO8859_7: /* Greek */ c = iso8859_7tab[c]; break; case I2CS_ISO8859_8: /* Hebrew */ c = iso8859_8tab[c]; break; case I2CS_ISO8859_9: /* Latin-5 (Finnish, Portuguese) */ c = iso8859_9tab[c]; break; case I2CS_TIS620: /* Thai */ c = tis620tab[c]; break; case I2CS_ISO8859_10: /* Latin-6 (Northern Europe) */ c = iso8859_10tab[c]; break; case I2CS_ISO8859_13: /* Baltic */ c = iso8859_13tab[c]; break; case I2CS_VSCII: /* Vietnamese */ c = visciitab[c]; break; case I2CS_ISO8859_15: /* Euro */ c = iso8859_15tab[c]; break; default: /* all other character sets */ /* multibyte character set */ if ((gi & I2CS_MUL) && !(c & BIT8) && isgraph (c)) { c = (i < text->size) ? text->data[i++] : 0; switch (gi) { #ifdef GBTOUNICODE case I2CS_GB: /* GB 2312 */ c = GBTOUNICODE (co,c,ku,ten); break; #endif #ifdef JISTOUNICODE case I2CS_JIS_OLD:/* JIS X 0208-1978 */ case I2CS_JIS_NEW:/* JIS X 0208-1983 */ c = JISTOUNICODE (co,c,ku,ten); break; #endif #ifdef JIS0212TOUNICODE case I2CS_JIS_EXT:/* JIS X 0212-1990 */ c = JIS0212TOUNICODE (co,c,ku,ten); break; #endif #ifdef KSCTOUNICODE case I2CS_KSC: /* KSC 5601 */ co |= BIT8; /* make into EUC */ c |= BIT8; c = KSCTOUNICODE (co,c,ku,ten); break; #endif #ifdef CNS1TOUNICODE case I2CS_CNS1: /* CNS 11643 plane 1 */ c = CNS1TOUNICODE (co,c,ku,ten); break; #endif #ifdef CNS2TOUNICODE case I2CS_CNS2: /* CNS 11643 plane 2 */ c = CNS2TOUNICODE (co,c,ku,ten); break; #endif default: /* unknown multibyte, treat as UCS-2 */ c |= (co << 8); /* wrong, but nothing else to do */ break; } } else c = co; /* unknown single byte, treat as 8859-1 */ } if (pass) UTF8_PUT (s,c) else ret->size += UTF8_SIZE (c); } } } if (!pass) s = ret->data = (unsigned char *) fs_get (ret->size + 1); else if (((unsigned long) (s - ret->data)) != ret->size) fatal ("ISO-2022 to UTF-8 botch"); } } /* Convert charset labelled searchpgm to UTF-8 in place * Accepts: search program * charset */ void utf8_searchpgm (SEARCHPGM *pgm,char *charset) { SIZEDTEXT txt; SEARCHHEADER *hl; SEARCHOR *ol; SEARCHPGMLIST *pl; if (pgm) { /* must have a search program */ utf8_stringlist (pgm->bcc,charset); utf8_stringlist (pgm->cc,charset); utf8_stringlist (pgm->from,charset); utf8_stringlist (pgm->to,charset); utf8_stringlist (pgm->subject,charset); for (hl = pgm->header; hl; hl = hl->next) { if (utf8_text (&hl->line,charset,&txt,NIL)) { fs_give ((void **) &hl->line.data); hl->line.data = txt.data; hl->line.size = txt.size; } if (utf8_text (&hl->text,charset,&txt,NIL)) { fs_give ((void **) &hl->text.data); hl->text.data = txt.data; hl->text.size = txt.size; } } utf8_stringlist (pgm->body,charset); utf8_stringlist (pgm->text,charset); for (ol = pgm->or; ol; ol = ol->next) { utf8_searchpgm (ol->first,charset); utf8_searchpgm (ol->second,charset); } for (pl = pgm->not; pl; pl = pl->next) utf8_searchpgm (pl->pgm,charset); } } /* Convert charset labelled stringlist to UTF-8 in place * Accepts: string list * charset */ void utf8_stringlist (STRINGLIST *st,char *charset) { SIZEDTEXT txt; /* convert entire stringstruct */ if (st) do if (utf8_text (&st->text,charset,&txt,NIL)) { fs_give ((void **) &st->text.data); st->text.data = txt.data; /* transfer this text */ st->text.size = txt.size; } while (st = st->next); } /* Convert MIME-2 sized text to UTF-8 * Accepts: source sized text * charset * Returns: T if successful, NIL if failure */ #define MINENCWORD 9 long utf8_mime2text (SIZEDTEXT *src,SIZEDTEXT *dst) { unsigned char *s,*se,*e,*ee,*t,*te; char *cs,*ce,*ls; SIZEDTEXT txt,rtxt; unsigned long i; dst->data = NIL; /* default is no encoded words */ /* look for encoded words */ for (s = src->data, se = src->data + src->size; s < se; s++) { if (((se - s) > MINENCWORD) && (*s == '=') && (s[1] == '?') && (cs = (char *) mime2_token (s+2,se,(unsigned char **) &ce)) && (e = mime2_token ((unsigned char *) ce+1,se,&ee)) && (t = mime2_text (e+2,se,&te)) && (ee == e + 1)) { if (mime2_decode (e,t,te,&txt)) { *ce = '\0'; /* temporarily tie off charset */ if (ls = strchr (cs,'*')) *ls = '\0'; if (utf8_text (&txt,cs,&rtxt,NIL)) { if (!dst->data) { /* need to create buffer now? */ /* allocate for worst case */ dst->data = (unsigned char *) fs_get ((size_t) ((src->size / 8) + 1) * 9); memcpy (dst->data,src->data,(size_t) (dst->size = s - src->data)); } for (i=0; i < rtxt.size; i++) dst->data[dst->size++] = rtxt.data[i]; /* all done with converted text */ if (rtxt.data != txt.data) fs_give ((void **) &rtxt.data); } if (ls) *ls = '*'; /* restore language tag delimiter */ *ce = '?'; /* restore charset delimiter */ /* all done with decoded text */ fs_give ((void **) &txt.data); s = te+1; /* continue scan after encoded word */ /* skip leading whitespace */ for (t = s + 1; (t < se) && ((*t == ' ') || (*t == '\t')); t++); /* see if likely continuation encoded word */ if (t < (se - MINENCWORD)) switch (*t) { case '=': /* possible encoded word? */ if (t[1] == '?') s = t - 1; break; case '\015': /* CR, eat a following LF */ if (t[1] == '\012') t++; case '\012': /* possible end of logical line */ if ((t[1] == ' ') || (t[1] == '\t')) { do t++; while ((t < (se - MINENCWORD)) && ((t[1] == ' ')||(t[1] == '\t'))); if ((t < (se - MINENCWORD)) && (t[1] == '=') && (t[2] == '?')) s = t; /* definitely looks like continuation */ } } } else { /* restore original text */ if (dst->data) fs_give ((void **) &dst->data); dst->data = src->data; dst->size = src->size; return NIL; /* syntax error: MIME-2 decoding failure */ } } /* stash ordinary character */ else if (dst->data) dst->data[dst->size++] = *s; } if (dst->data) dst->data[dst->size] = '\0'; else { /* nothing converted, return identity */ dst->data = src->data; dst->size = src->size; } return T; /* success */ } /* Decode MIME-2 text * Accepts: Encoding * text * text end * destination sized text * Returns: T if successful, else NIL */ long mime2_decode (unsigned char *e,unsigned char *t,unsigned char *te, SIZEDTEXT *txt) { unsigned char *q; txt->data = NIL; /* initially no returned data */ switch (*e) { /* dispatch based upon encoding */ case 'Q': case 'q': /* sort-of QUOTED-PRINTABLE */ txt->data = (unsigned char *) fs_get ((size_t) (te - t) + 1); for (q = t,txt->size = 0; q < te; q++) switch (*q) { case '=': /* quoted character */ /* both must be hex */ if (!isxdigit (q[1]) || !isxdigit (q[2])) { fs_give ((void **) &txt->data); return NIL; /* syntax error: bad quoted character */ } txt->data[txt->size++] = /* assemble character */ ((q[1] - (isdigit (q[1]) ? '0' : ((isupper (q[1]) ? 'A' : 'a') - 10))) << 4) + (q[2] - (isdigit (q[2]) ? '0' : ((isupper (q[2]) ? 'A' : 'a') - 10))); q += 2; /* advance past quoted character */ break; case '_': /* convert to space */ txt->data[txt->size++] = ' '; break; default: /* ordinary character */ txt->data[txt->size++] = *q; break; } txt->data[txt->size] = '\0'; break; case 'B': case 'b': /* BASE64 */ if (txt->data = (unsigned char *) rfc822_base64 (t,te - t,&txt->size)) break; default: /* any other encoding is unknown */ return NIL; /* syntax error: unknown encoding */ } return T; } /* Get MIME-2 token from encoded word * Accepts: current text pointer * text limit pointer * pointer to returned end pointer * Returns: current text pointer & end pointer if success, else NIL */ unsigned char *mime2_token (unsigned char *s,unsigned char *se, unsigned char **t) { for (*t = s; **t != '?'; ++*t) { if ((*t < se) && isgraph (**t)) switch (**t) { case '(': case ')': case '<': case '>': case '@': case ',': case ';': case ':': case '\\': case '"': case '/': case '[': case ']': case '.': case '=': return NIL; /* none of these are valid in tokens */ } else return NIL; /* out of text or CTL or space */ } return s; } /* Get MIME-2 text from encoded word * Accepts: current text pointer * text limit pointer * pointer to returned end pointer * Returns: current text pointer & end pointer if success, else NIL */ unsigned char *mime2_text (unsigned char *s,unsigned char *se, unsigned char **t) { /* make sure valid, search for closing ? */ for (*t = s; **t != '?'; ++*t) if ((*t >= se) || !isgraph (**t)) return NIL; /* make sure terminated properly */ if ((*t)[1] != '=') return NIL; return s; }