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+/* ========================================================================
+ * Copyright 1988-2008 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *
+ * ========================================================================
+ */
+
+/*
+ * 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: 17 January 2008
+ */
+
+
+#include <stdio.h>
+#include <ctype.h>
+#include "c-client.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 "windows.c" /* Windows */
+#include "ibm.c" /* IBM */
+#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 */
+
+
+#include "widths.c" /* Unicode character widths */
+#include "tmap.c" /* Unicode titlecase mapping */
+#include "decomtab.c" /* Unicode decomposions */
+
+/* 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};
+#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};
+#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 */
+
+static const CHARSET utf8_csvalid[] = {
+ {"US-ASCII",CT_ASCII,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ NIL,NIL,NIL},
+ {"UTF-8",CT_UTF8,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ NIL,SC_UNICODE,NIL},
+ {"UTF-7",CT_UTF7,CF_PRIMARY | CF_POSTING | CF_UNSUPRT,
+ NIL,SC_UNICODE,"UTF-8"},
+ {"ISO-8859-1",CT_1BYTE0,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ NIL,SC_LATIN_1,NIL},
+ {"ISO-8859-2",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_2tab,SC_LATIN_2,NIL},
+ {"ISO-8859-3",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_3tab,SC_LATIN_3,NIL},
+ {"ISO-8859-4",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_4tab,SC_LATIN_4,NIL},
+ {"ISO-8859-5",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_5tab,SC_CYRILLIC,"KOI8-R"},
+ {"ISO-8859-6",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_6tab,SC_ARABIC,NIL},
+ {"ISO-8859-7",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_7tab,SC_GREEK,NIL},
+ {"ISO-8859-8",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_8tab,SC_HEBREW,NIL},
+ {"ISO-8859-9",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_9tab,SC_LATIN_5,NIL},
+ {"ISO-8859-10",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_10tab,SC_LATIN_6,NIL},
+ {"ISO-8859-11",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_11tab,SC_THAI,NIL},
+#if 0 /* ISO 8859-12 reserved for ISCII(?) */
+ {"ISO-8859-12",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_12tab,NIL,NIL},
+#endif
+ {"ISO-8859-13",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_13tab,SC_LATIN_7,NIL},
+ {"ISO-8859-14",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_14tab,SC_LATIN_8,NIL},
+ {"ISO-8859-15",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_15tab,SC_LATIN_9,NIL},
+ {"ISO-8859-16",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) iso8859_16tab,SC_LATIN_10,NIL},
+ {"KOI8-R",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) koi8rtab,SC_CYRILLIC,NIL},
+ {"KOI8-U",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) koi8utab,SC_CYRILLIC | SC_UKRANIAN,NIL},
+ {"KOI8-RU",CT_1BYTE,CF_DISPLAY,
+ (void *) koi8utab,SC_CYRILLIC | SC_UKRANIAN,"KOI8-U"},
+ {"TIS-620",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) tis620tab,SC_THAI,"ISO-8859-11"},
+ {"VISCII",CT_1BYTE8,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) visciitab,SC_VIETNAMESE,NIL},
+
+#ifdef GBTOUNICODE
+ {"GBK",CT_DBYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) &gb_param,SC_CHINESE_SIMPLIFIED,NIL},
+ {"GB2312",CT_DBYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) &gb_param,SC_CHINESE_SIMPLIFIED,"GBK"},
+ {"CN-GB",CT_DBYTE,CF_DISPLAY,
+ (void *) &gb_param,SC_CHINESE_SIMPLIFIED,"GBK"},
+#ifdef CNS1TOUNICODE
+ {"ISO-2022-CN",CT_2022,CF_PRIMARY | CF_UNSUPRT,
+ NIL,SC_CHINESE_SIMPLIFIED | SC_CHINESE_TRADITIONAL,
+ NIL},
+#endif
+#endif
+#ifdef GB12345TOUNICODE
+ {"CN-GB-12345",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &gbt_param,SC_CHINESE_TRADITIONAL,"BIG5"},
+#endif
+#ifdef BIG5TOUNICODE
+ {"BIG5",CT_DBYTE2,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) big5_param,SC_CHINESE_TRADITIONAL,NIL},
+ {"CN-BIG5",CT_DBYTE2,CF_DISPLAY,
+ (void *) big5_param,SC_CHINESE_TRADITIONAL,"BIG5"},
+ {"BIG-5",CT_DBYTE2,CF_DISPLAY,
+ (void *) big5_param,SC_CHINESE_TRADITIONAL,"BIG5"},
+#endif
+#ifdef JISTOUNICODE
+ {"ISO-2022-JP",CT_2022,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ NIL,SC_JAPANESE,NIL},
+ {"EUC-JP",CT_EUC,CF_PRIMARY | CF_DISPLAY,
+ (void *) jis_param,SC_JAPANESE,"ISO-2022-JP"},
+ {"SHIFT_JIS",CT_SJIS,CF_PRIMARY | CF_DISPLAY,
+ NIL,SC_JAPANESE,"ISO-2022-JP"},
+ {"SHIFT-JIS",CT_SJIS,CF_PRIMARY | CF_DISPLAY,
+ NIL,SC_JAPANESE,"ISO-2022-JP"},
+#ifdef JIS0212TOUNICODE
+ {"ISO-2022-JP-1",CT_2022,CF_UNSUPRT,
+ NIL,SC_JAPANESE,"ISO-2022-JP"},
+#ifdef GBTOUNICODE
+#ifdef KSCTOUNICODE
+ {"ISO-2022-JP-2",CT_2022,CF_UNSUPRT,
+ NIL,
+ SC_LATIN_1 | SC_LATIN_2 | SC_LATIN_3 | SC_LATIN_4 | SC_LATIN_5 |
+ SC_LATIN_6 | SC_LATIN_7 | SC_LATIN_8 | SC_LATIN_9 | SC_LATIN_10 |
+ SC_ARABIC | SC_CYRILLIC | SC_GREEK | SC_HEBREW | SC_THAI |
+ SC_VIETNAMESE | SC_CHINESE_SIMPLIFIED | SC_JAPANESE | SC_KOREAN
+#ifdef CNS1TOUNICODE
+ | SC_CHINESE_TRADITIONAL
+#endif
+ ,"UTF-8"},
+#endif
+#endif
+#endif
+#endif
+
+#ifdef KSCTOUNICODE
+ {"ISO-2022-KR",CT_2022,CF_PRIMARY | CF_DISPLAY | CF_UNSUPRT,
+ NIL,SC_KOREAN,"EUC-KR"},
+ {"EUC-KR",CT_DBYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) &ksc_param,SC_KOREAN,NIL},
+ {"KSC5601",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"KSC_5601",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"KS_C_5601-1987",CT_DBYTE,CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"KS_C_5601-1989",CT_DBYTE,CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"KS_C_5601-1992",CT_DBYTE,CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"KS_C_5601-1997",CT_DBYTE,CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+#endif
+
+ /* deep sigh */
+ {"WINDOWS-874",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_874tab,SC_THAI,"ISO-8859-11"},
+ {"CP874",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_874tab,SC_THAI,"ISO-8859-11"},
+#ifdef GBTOUNICODE
+ {"WINDOWS-936",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &gb_param,SC_CHINESE_SIMPLIFIED,"GBK"},
+ {"CP936",CT_DBYTE,CF_DISPLAY,
+ (void *) &gb_param,SC_CHINESE_SIMPLIFIED,"GBK"},
+#endif
+#ifdef KSCTOUNICODE
+ {"WINDOWS-949",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"CP949",CT_DBYTE,CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+ {"X-WINDOWS-949",CT_DBYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) &ksc_param,SC_KOREAN,"EUC-KR"},
+#endif
+ {"WINDOWS-1250",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1250tab,SC_LATIN_2,"ISO-8859-2"},
+ {"CP1250",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1250tab,SC_LATIN_2,"ISO-8859-2"},
+ {"WINDOWS-1251",CT_1BYTE,CF_PRIMARY | CF_DISPLAY | CF_POSTING,
+ (void *) windows_1251tab,SC_CYRILLIC,"KOI8-R"},
+ {"CP1251",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1251tab,SC_CYRILLIC,"KOI8-R"},
+ {"WINDOWS-1252",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1252tab,SC_LATIN_1,"ISO-8859-1"},
+ {"CP1252",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1252tab,SC_LATIN_1,"ISO-8859-1"},
+ {"WINDOWS-1253",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1253tab,SC_GREEK,"ISO-8859-7"},
+ {"CP1253",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1253tab,SC_GREEK,"ISO-8859-7"},
+ {"WINDOWS-1254",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1254tab,SC_LATIN_5,"ISO-8859-9"},
+ {"CP1254",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1254tab,SC_LATIN_5,"ISO-8859-9"},
+ {"WINDOWS-1255",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1255tab,SC_HEBREW,"ISO-8859-8"},
+ {"CP1255",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1255tab,SC_HEBREW,"ISO-8859-8"},
+ {"WINDOWS-1256",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1256tab,SC_ARABIC,"ISO-8859-6"},
+ {"CP1256",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1256tab,SC_ARABIC,"ISO-8859-6"},
+ {"WINDOWS-1257",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1257tab,SC_LATIN_7,"ISO-8859-13"},
+ {"CP1257",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1257tab,SC_LATIN_7,"ISO-8859-13"},
+ {"WINDOWS-1258",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) windows_1258tab,SC_VIETNAMESE,"VISCII"},
+ {"CP1258",CT_1BYTE,CF_DISPLAY,
+ (void *) windows_1258tab,SC_VIETNAMESE,"VISCII"},
+
+ /* deeper sigh */
+ {"IBM367",CT_ASCII,CF_PRIMARY | CF_DISPLAY,
+ NIL,NIL,"US-ASCII"},
+ {"IBM437",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_437tab,SC_LATIN_1,"ISO-8859-1"},
+ {"IBM737",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_737tab,SC_GREEK,"ISO-8859-7"},
+ {"IBM775",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_775tab,SC_LATIN_7,"ISO-8859-13"},
+ {"IBM850",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_850tab,SC_LATIN_1,"ISO-8859-1"},
+ {"IBM852",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_852tab,SC_LATIN_2,"ISO-8859-2"},
+ {"IBM855",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_855tab,SC_CYRILLIC,"ISO-8859-5"},
+ {"IBM857",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_857tab,SC_LATIN_5,"ISO-8859-9"},
+ {"IBM860",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_860tab,SC_LATIN_1,"ISO-8859-1"},
+ {"IBM861",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_861tab,SC_LATIN_6,"ISO-8859-10"},
+ {"IBM862",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_862tab,SC_HEBREW,"ISO-8859-8"},
+ {"IBM863",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_863tab,SC_LATIN_1,"ISO-8859-1"},
+ {"IBM864",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_864tab,SC_ARABIC,"ISO-8859-6"},
+ {"IBM865",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_865tab,SC_LATIN_6,"ISO-8859-10"},
+ {"IBM866",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_866tab,SC_CYRILLIC,"KOI8-R"},
+ {"IBM869",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_869tab,SC_GREEK,"ISO-8859-7"},
+ {"IBM874",CT_1BYTE,CF_PRIMARY | CF_DISPLAY,
+ (void *) ibm_874tab,SC_THAI,"ISO-8859-11"},
+ /* deepest sigh */
+ {"ANSI_X3.4-1968",CT_ASCII,CF_DISPLAY,
+ NIL,NIL,"US-ASCII"},
+ {"UNICODE-1-1-UTF-7",CT_UTF7,CF_UNSUPRT,
+ NIL,SC_UNICODE,"UTF-8"},
+ /* these should never appear in email */
+ {"UCS-2",CT_UCS2,CF_PRIMARY | CF_DISPLAY | CF_NOEMAIL,
+ NIL,SC_UNICODE,"UTF-8"},
+ {"UCS-4",CT_UCS4,CF_PRIMARY | CF_DISPLAY | CF_NOEMAIL,
+ NIL,SC_UNICODE,"UTF-8"},
+ {"UTF-16",CT_UTF16,CF_PRIMARY | CF_DISPLAY | CF_NOEMAIL,
+ NIL,SC_UNICODE,"UTF-8"},
+ NIL
+};
+
+/* Non-Unicode Script table */
+
+static const SCRIPT utf8_scvalid[] = {
+ {"Arabic",NIL,SC_ARABIC},
+ {"Chinese Simplified","China, Singapore",SC_CHINESE_SIMPLIFIED},
+ {"Chinese Traditional","Taiwan, Hong Kong, Macao",SC_CHINESE_TRADITIONAL},
+ {"Cyrillic",NIL,SC_CYRILLIC},
+ {"Cyrillic Ukranian",NIL,SC_UKRANIAN},
+ {"Greek",NIL,SC_GREEK},
+ {"Hebrew",NIL,SC_HEBREW},
+ {"Japanese",NIL,SC_JAPANESE},
+ {"Korean",NIL,SC_KOREAN},
+ {"Latin-1","Western Europe",SC_LATIN_1},
+ {"Latin-2","Eastern Europe",SC_LATIN_2},
+ {"Latin-3","Southern Europe",SC_LATIN_3},
+ {"Latin-4","Northern Europe",SC_LATIN_4},
+ {"Latin-5","Turkish",SC_LATIN_5},
+ {"Latin-6","Nordic",SC_LATIN_6},
+ {"Latin-7","Baltic",SC_LATIN_7},
+ {"Latin-8","Celtic",SC_LATIN_8},
+ {"Latin-9","Euro",SC_LATIN_9},
+ {"Latin-10","Balkan",SC_LATIN_10},
+ {"Thai",NIL,SC_THAI},
+ {"Vietnamese",NIL,SC_VIETNAMESE},
+ NIL
+};
+
+/* Look up script name or return entire table
+ * Accepts: script name or NIL
+ * Returns: pointer to script table entry or NIL if unknown
+ */
+
+SCRIPT *utf8_script (char *script)
+{
+ unsigned long i;
+ if (!script) return (SCRIPT *) &utf8_scvalid[0];
+ else if (*script && (strlen (script) < 128))
+ for (i = 0; utf8_scvalid[i].name; i++)
+ if (!compare_cstring (script,utf8_scvalid[i].name))
+ return (SCRIPT *) &utf8_scvalid[i];
+ return NIL; /* failed */
+}
+
+
+/* Look up charset name or return entire table
+ * Accepts: charset name or NIL
+ * Returns: charset table entry or NIL if unknown
+ */
+
+const CHARSET *utf8_charset (char *charset)
+{
+ unsigned long i;
+ if (!charset) return (CHARSET *) &utf8_csvalid[0];
+ else if (*charset && (strlen (charset) < 128))
+ for (i = 0; utf8_csvalid[i].name; i++)
+ if (!compare_cstring (charset,utf8_csvalid[i].name))
+ return (CHARSET *) &utf8_csvalid[i];
+ return NIL; /* failed */
+}
+
+/* Validate charset and generate error message if invalid
+ * Accepts: bad character set
+ * Returns: NIL if good charset, else error message string
+ */
+
+#define BADCSS "[BADCHARSET ("
+#define BADCSE ")] Unknown charset: "
+
+char *utf8_badcharset (char *charset)
+{
+ char *msg = NIL;
+ if (!utf8_charset (charset)) {
+ char *s,*t;
+ unsigned long i,j;
+ /* calculate size of header, trailer, and bad
+ * charset plus charset names */
+ for (i = 0, j = sizeof (BADCSS) + sizeof (BADCSE) + strlen (charset) - 2;
+ utf8_csvalid[i].name; i++)
+ j += strlen (utf8_csvalid[i].name) + 1;
+ /* not built right */
+ if (!i) fatal ("No valid charsets!");
+ /* header */
+ for (s = msg = (char *) fs_get (j), t = BADCSS; *t; *s++ = *t++);
+ /* each charset */
+ for (i = 0; utf8_csvalid[i].name; *s++ = ' ', i++)
+ for (t = utf8_csvalid[i].name; *t; *s++ = *t++);
+ /* back over last space, trailer */
+ for (t = BADCSE, --s; *t; *s++ = *t++);
+ /* finally bogus charset */
+ for (t = charset; *t; *s++ = *t++);
+ *s++ = '\0'; /* finally tie off string */
+ if (s != (msg + j)) fatal ("charset msg botch");
+ }
+ return msg;
+}
+
+/* Convert charset labelled sized text to UTF-8
+ * Accepts: source sized text
+ * charset
+ * pointer to returned sized text if non-NIL
+ * flags
+ * Returns: T if successful, NIL if failure
+ */
+
+long utf8_text (SIZEDTEXT *text,char *charset,SIZEDTEXT *ret,long flags)
+{
+ ucs4cn_t cv = (flags & U8T_CASECANON) ? ucs4_titlecase : NIL;
+ ucs4de_t de = (flags & U8T_DECOMPOSE) ? ucs4_decompose_recursive : NIL;
+ const CHARSET *cs = (charset && *charset) ?
+ utf8_charset (charset) : utf8_infercharset (text);
+ if (cs) return (text && ret) ? utf8_text_cs (text,cs,ret,cv,de) : LONGT;
+ if (ret) { /* no conversion possible */
+ ret->data = text->data; /* so return source */
+ ret->size = text->size;
+ }
+ return NIL; /* failure */
+}
+
+
+/* Operations used in converting data */
+
+#define UTF8_COUNT_BMP(count,c,cv,de) { \
+ void *more = NIL; \
+ if (cv) c = (*cv) (c); \
+ if (de) c = (*de) (c,&more); \
+ do count += UTF8_SIZE_BMP(c); \
+ while (more && (c = (*de) (U8G_ERROR,&more)));\
+}
+
+#define UTF8_WRITE_BMP(b,c,cv,de) { \
+ void *more = NIL; \
+ if (cv) c = (*cv) (c); \
+ if (de) c = (*de) (c,&more); \
+ do UTF8_PUT_BMP (b,c) \
+ while (more && (c = (*de) (U8G_ERROR,&more)));\
+}
+
+#define UTF8_COUNT(count,c,cv,de) { \
+ void *more = NIL; \
+ if (cv) c = (*cv) (c); \
+ if (de) c = (*de) (c,&more); \
+ do count += utf8_size (c); \
+ while (more && (c = (*de) (U8G_ERROR,&more)));\
+}
+
+#define UTF8_WRITE(b,c,cv,de) { \
+ void *more = NIL; \
+ if (cv) c = (*cv) (c); \
+ if (de) c = (*de) (c,&more); \
+ do b = utf8_put (b,c); \
+ while (more && (c = (*de) (U8G_ERROR,&more)));\
+}
+
+/* Convert sized text to UTF-8 given CHARSET block
+ * Accepts: source sized text
+ * CHARSET block
+ * pointer to returned sized text
+ * canonicalization function
+ * decomposition function
+ * Returns: T if successful, NIL if failure
+ */
+
+long utf8_text_cs (SIZEDTEXT *text,const CHARSET *cs,SIZEDTEXT *ret,
+ ucs4cn_t cv,ucs4de_t de)
+{
+ ret->data = text->data; /* default to source */
+ ret->size = text->size;
+ switch (cs->type) { /* convert if type known */
+ case CT_ASCII: /* 7-bit ASCII no table */
+ case CT_UTF8: /* variable UTF-8 encoded Unicode no table */
+ if (cv || de) utf8_text_utf8 (text,ret,cv,de);
+ break;
+ case CT_1BYTE0: /* 1 byte no table */
+ utf8_text_1byte0 (text,ret,cv,de);
+ break;
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ utf8_text_1byte (text,ret,cs->tab,cv,de);
+ break;
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ utf8_text_1byte8 (text,ret,cs->tab,cv,de);
+ break;
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ utf8_text_euc (text,ret,cs->tab,cv,de);
+ break;
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ utf8_text_dbyte (text,ret,cs->tab,cv,de);
+ break;
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ utf8_text_dbyte2 (text,ret,cs->tab,cv,de);
+ break;
+ case CT_UTF7: /* variable UTF-7 encoded Unicode no table */
+ utf8_text_utf7 (text,ret,cv,de);
+ break;
+ case CT_UCS2: /* 2 byte 16-bit Unicode no table */
+ utf8_text_ucs2 (text,ret,cv,de);
+ break;
+ case CT_UCS4: /* 4 byte 32-bit Unicode no table */
+ utf8_text_ucs4 (text,ret,cv,de);
+ break;
+ case CT_UTF16: /* variable UTF-16 encoded Unicode no table */
+ utf8_text_utf16 (text,ret,cv,de);
+ break;
+ case CT_2022: /* variable ISO-2022 encoded no table*/
+ utf8_text_2022 (text,ret,cv,de);
+ break;
+ case CT_SJIS: /* 2 byte Shift-JIS encoded JIS no table */
+ utf8_text_sjis (text,ret,cv,de);
+ break;
+ default: /* unknown character set type */
+ return NIL;
+ }
+ return LONGT; /* return success */
+}
+
+/* Reverse mapping routines
+ *
+ * These routines only support character sets, not all possible charsets. In
+ * particular, they do not support any Unicode encodings or ISO 2022.
+ *
+ * As a special dispensation, utf8_cstext() and utf8_cstocstext() support
+ * support ISO-2022-JP if EUC-JP can be reverse mapped; and utf8_rmaptext()
+ * will generated ISO-2022-JP using an EUC-JP rmap if flagged to do so.
+ *
+ * No attempt is made to map "equivalent" Unicode characters or Unicode
+ * characters that have the same glyph; nor is there any attempt to handle
+ * combining characters or otherwise do any stringprep. Maybe later.
+ */
+
+
+/* Convert UTF-8 sized text to charset
+ * Accepts: source sized text
+ * destination charset
+ * pointer to returned sized text
+ * substitute character if not in cs, else NIL to return failure
+ * Returns: T if successful, NIL if failure
+ */
+
+
+long utf8_cstext (SIZEDTEXT *text,char *charset,SIZEDTEXT *ret,
+ unsigned long errch)
+{
+ short iso2022jp = !compare_cstring (charset,"ISO-2022-JP");
+ unsigned short *rmap = utf8_rmap (iso2022jp ? "EUC-JP" : charset);
+ return rmap ? utf8_rmaptext (text,rmap,ret,errch,iso2022jp) : NIL;
+}
+
+/* Convert charset labelled sized text to another charset
+ * Accepts: source sized text
+ * source charset
+ * pointer to returned sized text
+ * destination charset
+ * substitute character if not in dest cs, else NIL to return failure
+ * Returns: T if successful, NIL if failure
+ *
+ * This routine has the same restricts as utf8_cstext().
+ */
+
+long utf8_cstocstext (SIZEDTEXT *src,char *sc,SIZEDTEXT *dst,char *dc,
+ unsigned long errch)
+{
+ SIZEDTEXT utf8;
+ const CHARSET *scs,*dcs;
+ unsigned short *rmap;
+ long ret = NIL;
+ long iso2022jp;
+ /* lookup charsets and reverse map */
+ if ((dc && (dcs = utf8_charset (dc))) &&
+ (rmap = (iso2022jp = ((dcs->type == CT_2022) &&
+ !compare_cstring (dcs->name,"ISO-2022-JP"))) ?
+ utf8_rmap ("EUC-JP") : utf8_rmap_cs (dcs)) &&
+ (scs = (sc && *sc) ? utf8_charset (sc) : utf8_infercharset (src))) {
+ /* init temporary buffer */
+ memset (&utf8,NIL,sizeof (SIZEDTEXT));
+ /* source cs equivalent to dest cs? */
+ if ((scs->type == dcs->type) && (scs->tab == dcs->tab)) {
+ dst->data = src->data; /* yes, just copy pointers */
+ dst->size = src->size;
+ ret = LONGT;
+ }
+ /* otherwise do the conversion */
+ else ret = (utf8_text_cs (src,scs,&utf8,NIL,NIL) &&
+ utf8_rmaptext (&utf8,rmap,dst,errch,iso2022jp));
+ /* flush temporary buffer */
+ if (utf8.data && (utf8.data != src->data) && (utf8.data != dst->data))
+ fs_give ((void **) &utf8.data);
+ }
+ return ret;
+}
+
+/* Cached rmap */
+
+static const CHARSET *currmapcs = NIL;
+static unsigned short *currmap = NIL;
+
+
+/* Cache and return map for UTF-8 -> character set
+ * Accepts: character set name
+ * Returns: cached map if character set found, else NIL
+ */
+
+unsigned short *utf8_rmap (char *charset)
+{
+ return (currmapcs && !compare_cstring (charset,currmapcs->name)) ? currmap :
+ utf8_rmap_cs (utf8_charset (charset));
+}
+
+
+/* Cache and return map for UTF-8 -> character set given CHARSET block
+ * Accepts: CHARSET block
+ * Returns: cached map if character set found, else NIL
+ */
+
+unsigned short *utf8_rmap_cs (const CHARSET *cs)
+{
+ unsigned short *ret = NIL;
+ if (!cs); /* have charset? */
+ else if (cs == currmapcs) ret = currmap;
+ else if (ret = utf8_rmap_gen (cs,currmap)) {
+ currmapcs = cs;
+ currmap = ret;
+ }
+ return ret;
+}
+
+/* Return map for UTF-8 -> character set given CHARSET block
+ * Accepts: CHARSET block
+ * old map to recycle
+ * Returns: map if character set found, else NIL
+ */
+
+unsigned short *utf8_rmap_gen (const CHARSET *cs,unsigned short *oldmap)
+{
+ unsigned short u,*tab,*rmap;
+ unsigned int i,m,ku,ten;
+ struct utf8_eucparam *param,*p2;
+ switch (cs->type) { /* is a character set? */
+ case CT_ASCII: /* 7-bit ASCII no table */
+ case CT_1BYTE0: /* 1 byte no table */
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ case CT_SJIS: /* 2 byte Shift-JIS */
+ rmap = oldmap ? oldmap : /* recycle old map if supplied else make new */
+ (unsigned short *) fs_get (65536 * sizeof (unsigned short));
+ /* initialize table for ASCII */
+ for (i = 0; i < 128; i++) rmap[i] = (unsigned short) i;
+ /* populate remainder of table with NOCHAR */
+#define NOCHARBYTE (NOCHAR & 0xff)
+#if NOCHAR - ((NOCHARBYTE << 8) | NOCHARBYTE)
+ while (i < 65536) rmap[i++] = NOCHAR;
+#else
+ memset (rmap + 128,NOCHARBYTE,(65536 - 128) * sizeof (unsigned short));
+#endif
+ break;
+ default: /* unsupported charset type */
+ rmap = NIL; /* no map possible */
+ }
+ if (rmap) { /* have a map? */
+ switch (cs->type) { /* additional reverse map actions */
+ case CT_1BYTE0: /* 1 byte no table */
+ for (i = 128; i < 256; i++) rmap[i] = (unsigned short) i;
+ break;
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ for (tab = (unsigned short *) cs->tab,i = 128; i < 256; i++)
+ if (tab[i & BITS7] != UBOGON) rmap[tab[i & BITS7]] = (unsigned short)i;
+ break;
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ for (tab = (unsigned short *) cs->tab,i = 0; i < 256; i++)
+ if (tab[i] != UBOGON) rmap[tab[i]] = (unsigned short) i;
+ break;
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ for (param = (struct utf8_eucparam *) cs->tab,
+ tab = (unsigned short *) param->tab, ku = 0;
+ ku < param->max_ku; ku++)
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * param->max_ten) + ten]) != UBOGON)
+ rmap[u] = ((ku + param->base_ku) << 8) +
+ (ten + param->base_ten) + 0x8080;
+ break;
+
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ for (param = (struct utf8_eucparam *) cs->tab,
+ tab = (unsigned short *) param->tab, ku = 0;
+ ku < param->max_ku; ku++)
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * param->max_ten) + ten]) != UBOGON)
+ rmap[u] = ((ku + param->base_ku) << 8) + (ten + param->base_ten);
+ break;
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ param = (struct utf8_eucparam *) cs->tab;
+ p2 = param + 1; /* plane 2 parameters */
+ /* only ten parameters should differ */
+ if ((param->base_ku != p2->base_ku) || (param->max_ku != p2->max_ku))
+ fatal ("ku definition error for CT_DBYTE2 charset");
+ /* total codepoints in each ku */
+ m = param->max_ten + p2->max_ten;
+ tab = (unsigned short *) param->tab;
+ for (ku = 0; ku < param->max_ku; ku++) {
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * m) + ten]) != UBOGON)
+ rmap[u] = ((ku + param->base_ku) << 8) + (ten + param->base_ten);
+ for (ten = 0; ten < p2->max_ten; ten++)
+ if ((u = tab[(ku * m) + param->max_ten + ten]) != UBOGON)
+ rmap[u] = ((ku + param->base_ku) << 8) + (ten + p2->base_ten);
+ }
+ break;
+ case CT_SJIS: /* 2 byte Shift-JIS */
+ for (ku = 0; ku < MAX_JIS0208_KU; ku++)
+ for (ten = 0; ten < MAX_JIS0208_TEN; ten++)
+ if ((u = jis0208tab[ku][ten]) != UBOGON) {
+ int sku = ku + BASE_JIS0208_KU;
+ int sten = ten + BASE_JIS0208_TEN;
+ rmap[u] = ((((sku + 1) >> 1) + ((sku < 95) ? 112 : 176)) << 8) +
+ sten + ((sku % 2) ? ((sten > 95) ? 32 : 31) : 126);
+ }
+ /* JIS Roman */
+ rmap[UCS2_YEN] = JISROMAN_YEN;
+ rmap[UCS2_OVERLINE] = JISROMAN_OVERLINE;
+ /* JIS hankaku katakana */
+ for (u = 0; u < (MAX_KANA_8 - MIN_KANA_8); u++)
+ rmap[UCS2_KATAKANA + u] = MIN_KANA_8 + u;
+ break;
+ }
+ /* hack: map NBSP to SP if otherwise no map */
+ if (rmap[0x00a0] == NOCHAR) rmap[0x00a0] = rmap[0x0020];
+ }
+ return rmap; /* return map */
+}
+
+/* Convert UTF-8 sized text to charset using rmap
+ * Accepts: source sized text
+ * conversion rmap
+ * pointer to returned sized text
+ * substitute character if not in rmap, else NIL to return failure
+ * ISO-2022-JP conversion flag
+ * Returns T if successful, NIL if failure
+ *
+ * This routine doesn't try to convert to all possible charsets; in particular
+ * it doesn't support other Unicode encodings or any ISO 2022 other than
+ * ISO-2022-JP.
+ */
+
+long utf8_rmaptext (SIZEDTEXT *text,unsigned short *rmap,SIZEDTEXT *ret,
+ unsigned long errch,long iso2022jp)
+{
+ unsigned long i,u,c;
+ /* get size of buffer */
+ if (i = utf8_rmapsize (text,rmap,errch,iso2022jp)) {
+ unsigned char *s = text->data;
+ unsigned char *t = ret->data = (unsigned char *) fs_get (i);
+ ret->size = i - 1; /* number of octets in destination buffer */
+ /* start non-zero ISO-2022-JP state at 1 */
+ if (iso2022jp) iso2022jp = 1;
+ /* convert string, ignore BOM */
+ for (i = text->size; i;) if ((u = utf8_get (&s,&i)) != UCS2_BOM) {
+ /* substitute error character for NOCHAR */
+ if ((u & U8GM_NONBMP) || ((c = rmap[u]) == NOCHAR)) c = errch;
+ switch (iso2022jp) { /* depends upon ISO 2022 mode */
+ case 0: /* ISO 2022 not in effect */
+ /* two-byte character */
+ if (c > 0xff) *t++ = (unsigned char) (c >> 8);
+ /* single-byte or low-byte of two-byte */
+ *t++ = (unsigned char) (c & 0xff);
+ break;
+ case 1: /* ISO 2022 Roman */
+ /* <ch> */
+ if (c < 0x80) *t++ = (unsigned char) c;
+ else { /* JIS character */
+ *t++ = I2C_ESC; /* ESC $ B <hi> <lo> */
+ *t++ = I2C_MULTI;
+ *t++ = I2CS_94x94_JIS_NEW;
+ *t++ = (unsigned char) (c >> 8) & 0x7f;
+ *t++ = (unsigned char) c & 0x7f;
+ iso2022jp = 2; /* shift to ISO 2022 JIS */
+ }
+ break;
+ case 2: /* ISO 2022 JIS */
+ if (c > 0x7f) { /* <hi> <lo> */
+ *t++ = (unsigned char) (c >> 8) & 0x7f;
+ *t++ = (unsigned char) c & 0x7f;
+ }
+ else { /* ASCII character */
+ *t++ = I2C_ESC; /* ESC ( J <ch> */
+ *t++ = I2C_G0_94;
+ *t++ = I2CS_94_JIS_ROMAN;
+ *t++ = (unsigned char) c;
+ iso2022jp = 1; /* shift to ISO 2022 Roman */
+ }
+ break;
+ }
+ }
+ if (iso2022jp == 2) { /* ISO-2022-JP string must end in Roman */
+ *t++ = I2C_ESC; /* ESC ( J */
+ *t++ = I2C_G0_94;
+ *t++ = I2CS_94_JIS_ROMAN;
+ }
+ *t++ = NIL; /* tie off returned data */
+ return LONGT; /* return success */
+ }
+ ret->data = NIL;
+ ret->size = 0;
+ return NIL; /* failure */
+}
+
+/* Calculate size of convertsion of UTF-8 sized text to charset using rmap
+ * Accepts: source sized text
+ * conversion rmap
+ * pointer to returned sized text
+ * substitute character if not in rmap, else NIL to return failure
+ * ISO-2022-JP conversion flag
+ * Returns size+1 if successful, NIL if failure
+ *
+ * This routine doesn't try to handle to all possible charsets; in particular
+ * it doesn't support other Unicode encodings or any ISO 2022 other than
+ * ISO-2022-JP.
+ */
+
+unsigned long utf8_rmapsize (SIZEDTEXT *text,unsigned short *rmap,
+ unsigned long errch,long iso2022jp)
+{
+ unsigned long i,u,c;
+ unsigned long ret = 1; /* terminating NUL */
+ unsigned char *s = text->data;
+ if (iso2022jp) iso2022jp = 1; /* start non-zero ISO-2022-JP state at 1 */
+ for (i = text->size; i;) if ((u = utf8_get (&s,&i)) != UCS2_BOM) {
+ if ((u & U8GM_NONBMP) || (((c = rmap[u]) == NOCHAR) && !(c = errch)))
+ return NIL; /* not in BMP, or NOCHAR and no err char */
+ switch (iso2022jp) { /* depends upon ISO 2022 mode */
+ case 0: /* ISO 2022 not in effect */
+ ret += (c > 0xff) ? 2 : 1;
+ break;
+ case 1: /* ISO 2022 Roman */
+ if (c < 0x80) ret += 1; /* <ch> */
+ else { /* JIS character */
+ ret += 5; /* ESC $ B <hi> <lo> */
+ iso2022jp = 2; /* shift to ISO 2022 JIS */
+ }
+ break;
+ case 2: /* ISO 2022 JIS */
+ if (c > 0x7f) ret += 2; /* <hi> <lo> */
+ else { /* ASCII character */
+ ret += 4; /* ESC ( J <ch> */
+ iso2022jp = 1; /* shift to ISO 2022 Roman */
+ }
+ break;
+ }
+ }
+ if (iso2022jp == 2) { /* ISO-2022-JP string must end in Roman */
+ ret += 3; /* ESC ( J */
+ iso2022jp = 1; /* reset state to Roman */
+ }
+ return ret;
+}
+
+/* Convert UCS-4 to charset using rmap
+ * Accepts: source UCS-4 character(s)
+ * numver of UCS-4 characters
+ * conversion rmap
+ * pointer to returned sized text
+ * substitute character if not in rmap, else NIL to return failure
+ * Returns T if successful, NIL if failure
+ *
+ * Currently only supports BMP characters, and does not support ISO-2022
+ */
+
+long ucs4_rmaptext (unsigned long *ucs4,unsigned long len,unsigned short *rmap,
+ SIZEDTEXT *ret,unsigned long errch)
+{
+ long size = ucs4_rmaplen (ucs4,len,rmap,errch);
+ return (size >= 0) ? /* build in newly-created buffer */
+ ucs4_rmapbuf (ret->data = (unsigned char *) fs_get ((ret->size = size) +1),
+ ucs4,len,rmap,errch) : NIL;
+}
+
+/* Return size of UCS-4 string converted to other CS via rmap
+ * Accepts: source UCS-4 character(s)
+ * numver of UCS-4 characters
+ * conversion rmap
+ * substitute character if not in rmap, else NIL to return failure
+ * Returns: length if success, negative if failure (no-convert)
+ */
+
+long ucs4_rmaplen (unsigned long *ucs4,unsigned long len,unsigned short *rmap,
+ unsigned long errch)
+{
+ long ret;
+ unsigned long i,u,c;
+ /* count non-BOM characters */
+ for (ret = 0,i = 0; i < len; ++i) if ((u = ucs4[i]) != UCS2_BOM) {
+ if ((u & U8GM_NONBMP) || (((c = rmap[u]) == NOCHAR) && !(c = errch)))
+ return -1; /* not in BMP, or NOCHAR and no err char? */
+ ret += (c > 0xff) ? 2 : 1;
+ }
+ return ret;
+}
+
+
+/* Stuff buffer with UCS-4 string converted to other CS via rmap
+ * Accepts: destination buffer
+ * source UCS-4 character(s)
+ * number of UCS-4 characters
+ * conversion rmap
+ * substitute character if not in rmap, else NIL to return failure
+ * Returns: T, always
+ */
+
+long ucs4_rmapbuf (unsigned char *t,unsigned long *ucs4,unsigned long len,
+ unsigned short *rmap,unsigned long errch)
+{
+ unsigned long i,u,c;
+ /* convert non-BOM characters */
+ for (i = 0; i < len; ++i) if ((u = ucs4[i]) != UCS2_BOM) {
+ /* substitute error character for NOCHAR */
+ if ((u & U8GM_NONBMP) || ((c = rmap[u]) == NOCHAR)) c = errch;
+ /* two-byte character? */
+ if (c > 0xff) *t++ = (unsigned char) (c >> 8);
+ /* single-byte or low-byte of two-byte */
+ *t++ = (unsigned char) (c & 0xff);
+ }
+ *t++ = NIL; /* tie off returned data */
+ return LONGT;
+}
+
+/* Return UCS-4 Unicode character from UTF-8 string
+ * Accepts: pointer to string
+ * remaining octets in string
+ * Returns: UCS-4 character with pointer and count updated
+ * or error code with pointer and count unchanged
+ */
+
+unsigned long utf8_get (unsigned char **s,unsigned long *i)
+{
+ unsigned char *t = *s;
+ unsigned long j = *i;
+ /* decode raw UTF-8 string */
+ unsigned long ret = utf8_get_raw (&t,&j);
+ if (ret & U8G_ERROR); /* invalid raw UTF-8 decoding? */
+ /* no, is it surrogate? */
+ else if ((ret >= UTF16_SURR) && (ret <= UTF16_MAXSURR)) ret = U8G_SURROGA;
+ /* or in non-Unicode ISO 10646 space? */
+ else if (ret > UCS4_MAXUNICODE) ret = U8G_NOTUNIC;
+ else {
+ *s = t; /* all is well, update pointer */
+ *i = j; /* and counter */
+ }
+ return ret; /* return value */
+}
+
+/* Return raw (including non-Unicode) UCS-4 character from UTF-8 string
+ * Accepts: pointer to string
+ * remaining octets in string
+ * Returns: UCS-4 character with pointer and count updated
+ * or error code with pointer and count unchanged
+ */
+
+unsigned long utf8_get_raw (unsigned char **s,unsigned long *i)
+{
+ unsigned char c,c1;
+ unsigned char *t = *s;
+ unsigned long j = *i;
+ unsigned long ret = U8G_NOTUTF8;
+ int more = 0;
+ do { /* make sure have source octets available */
+ if (!j--) return more ? U8G_ENDSTRI : U8G_ENDSTRG;
+ /* UTF-8 continuation? */
+ else if (((c = *t++) > 0x7f) && (c < 0xc0)) {
+ /* continuation when not in progress */
+ if (!more) return U8G_BADCONT;
+ --more; /* found a continuation octet */
+ ret <<= 6; /* shift current value by 6 bits */
+ ret |= c & 0x3f; /* merge continuation octet */
+ }
+ /* incomplete UTF-8 character */
+ else if (more) return U8G_INCMPLT;
+ else { /* start of sequence */
+ c1 = j ? *t : 0xbf; /* assume valid continuation if incomplete */
+ if (c < 0x80) ret = c; /* U+0000 - U+007f */
+ else if (c < 0xc2); /* c0 and c1 never valid */
+ else if (c < 0xe0) { /* U+0080 - U+07ff */
+ if (c &= 0x1f) more = 1;
+ }
+ else if (c < 0xf0) { /* U+0800 - U+ffff */
+ if ((c &= 0x0f) || (c1 >= 0xa0)) more = 2;
+ }
+ else if (c < 0xf8) { /* U+10000 - U+10ffff (and 110000 - 1fffff) */
+ if ((c &= 0x07) || (c1 >= 0x90)) more = 3;
+ }
+ else if (c < 0xfc) { /* ISO 10646 200000 - 3ffffff */
+ if ((c &= 0x03) || (c1 >= 0x88)) more = 4;
+ }
+ else if (c < 0xfe) { /* ISO 10646 4000000 - 7fffffff */
+ if ((c &= 0x01) || (c1 >= 0x84)) more = 5;
+ }
+ /* fe and ff never valid */
+ if (more) { /* multi-octet, make sure more to come */
+ if (!j) return U8G_ENDSTRI;
+ ret = c; /* continuation needed, save start bits */
+ }
+ }
+ } while (more);
+ if (!(ret & U8G_ERROR)) { /* success return? */
+ *s = t; /* yes, update pointer */
+ *i = j; /* and counter */
+ }
+ return ret; /* return value */
+}
+
+/* Return UCS-4 character from named charset string
+ * Accepts: charset
+ * pointer to string
+ * remaining octets in string
+ * Returns: UCS-4 character with pointer and count updated, negative if error
+ *
+ * Error codes are the same as utf8_get().
+ */
+
+unsigned long ucs4_cs_get (CHARSET *cs,unsigned char **s,unsigned long *i)
+{
+ unsigned char c,c1,ku,ten;
+ unsigned long ret,d;
+ unsigned char *t = *s;
+ unsigned long j = *i;
+ struct utf8_eucparam *p1,*p2,*p3;
+ if (j--) c = *t++; /* get first octet */
+ else return U8G_ENDSTRG; /* empty string */
+ switch (cs->type) { /* convert if type known */
+ case CT_UTF8: /* variable UTF-8 encoded Unicode no table */
+ return utf8_get (s,i);
+ case CT_ASCII: /* 7-bit ASCII no table */
+ if (c >= 0x80) return U8G_NOTUTF8;
+ case CT_1BYTE0: /* 1 byte no table */
+ ret = c; /* identity */
+ break;
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ ret = (c > 0x80) ? ((unsigned short *) cs->tab)[c & BITS7] : c;
+ break;
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ ret = ((unsigned short *) cs->tab)[c];
+ break;
+
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ if (c & BIT8) {
+ p1 = (struct utf8_eucparam *) cs->tab;
+ p2 = p1 + 1;
+ p3 = p1 + 2;
+ if (j--) c1 = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ if (!(c1 & BIT8)) return U8G_NOTUTF8;
+ switch (c) { /* check 8bit code set */
+ case EUC_CS2: /* CS2 */
+ if (p2->base_ku) { /* CS2 set up? */
+ if (p2->base_ten) { /* yes, multibyte? */
+ if (j--) c = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ if ((c & BIT8) &&
+ ((ku = (c1 & BITS7) - p2->base_ku) < p2->max_ku) &&
+ ((ten = (c & BITS7) - p2->base_ten) < p2->max_ten)) {
+ ret = ((unsigned short *) p2->tab)[(ku*p2->max_ten) + ten];
+ break;
+ }
+ }
+ else if ((c1 >= p2->base_ku) && (c1 < p2->max_ku)) {
+ ret = c1 + ((unsigned long) p2->tab);
+ break;
+ }
+ }
+ return U8G_NOTUTF8; /* CS2 not set up or bogus */
+ case EUC_CS3: /* CS3 */
+ if (p3->base_ku) { /* CS3 set up? */
+ if (p3->base_ten) { /* yes, multibyte? */
+ if (j--) c = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ if ((c & BIT8) &&
+ ((ku = (c1 & BITS7) - p3->base_ku) < p3->max_ku) &&
+ ((ten = (c & BITS7) - p3->base_ten) < p3->max_ten)) {
+ ret = ((unsigned short *) p3->tab)[(ku*p3->max_ten) + ten];
+ break;
+ }
+ }
+ else if ((c1 >= p3->base_ku) && (c1 < p3->max_ku)) {
+ ret = c1 + ((unsigned long) p3->tab);
+ break;
+ }
+ }
+ return U8G_NOTUTF8; /* CS3 not set up or bogus */
+ default:
+ if (((ku = (c & BITS7) - p1->base_ku) >= p1->max_ku) ||
+ ((ten = (c1 & BITS7) - p1->base_ten) >= p1->max_ten))
+ return U8G_NOTUTF8;
+ ret = ((unsigned short *) p1->tab)[(ku*p1->max_ten) + ten];
+ /* special hack for JIS X 0212: merge rows less than 10 */
+ if ((ret == UBOGON) && ku && (ku < 10) && p3->tab && p3->base_ten)
+ ret = ((unsigned short *) p3->tab)
+ [((ku - (p3->base_ku - p1->base_ku))*p3->max_ten) + ten];
+ break;
+ }
+ }
+ else ret = c; /* ASCII character */
+ break;
+
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ if (c & BIT8) { /* double-byte character? */
+ p1 = (struct utf8_eucparam *) cs->tab;
+ if (j--) c1 = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ if (((ku = c - p1->base_ku) < p1->max_ku) &&
+ ((ten = c1 - p1->base_ten) < p1->max_ten))
+ ret = ((unsigned short *) p1->tab)[(ku*p1->max_ten) + ten];
+ else return U8G_NOTUTF8;
+ }
+ else ret = c; /* ASCII character */
+ break;
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ if (c & BIT8) { /* double-byte character? */
+ p1 = (struct utf8_eucparam *) cs->tab;
+ p2 = p1 + 1;
+ if (j--) c1 = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ if (c1 & BIT8) { /* high vs. low plane */
+ if ((ku = c - p2->base_ku) < p2->max_ku &&
+ ((ten = c1 - p2->base_ten) < p2->max_ten))
+ ret = ((unsigned short *) p1->tab)
+ [(ku*(p1->max_ten + p2->max_ten)) + p1->max_ten + ten];
+ else return U8G_NOTUTF8;
+ }
+ else if ((ku = c - p1->base_ku) < p1->max_ku &&
+ ((ten = c1 - p1->base_ten) < p1->max_ten))
+ ret = ((unsigned short *) p1->tab)
+ [(ku*(p1->max_ten + p2->max_ten)) + ten];
+ else return U8G_NOTUTF8;
+ }
+ else ret = c; /* ASCII character */
+ break;
+ case CT_SJIS: /* 2 byte Shift-JIS encoded JIS no table */
+ /* compromise - do yen sign but not overline */
+ if (!(c & BIT8)) ret = (c == JISROMAN_YEN) ? UCS2_YEN : c;
+ /* half-width katakana? */
+ else if ((c >= MIN_KANA_8) && (c < MAX_KANA_8)) ret = c + KANA_8;
+ else { /* Shift-JIS */
+ if (j--) c1 = *t++; /* get second octet */
+ else return U8G_ENDSTRI;
+ SJISTOJIS (c,c1);
+ c = JISTOUNICODE (c,c1,ku,ten);
+ }
+ break;
+
+ case CT_UCS2: /* 2 byte 16-bit Unicode no table */
+ ret = c << 8;
+ if (j--) c = *t++; /* get second octet */
+ else return U8G_ENDSTRI; /* empty string */
+ ret |= c;
+ break;
+ case CT_UCS4: /* 4 byte 32-bit Unicode no table */
+ if (c & 0x80) return U8G_NOTUTF8;
+ if (j < 3) return U8G_ENDSTRI;
+ j -= 3; /* count three octets */
+ ret = c << 24;
+ ret |= (*t++) << 16;
+ ret |= (*t++) << 8;
+ ret |= (*t++);
+ break;
+ case CT_UTF16: /* variable UTF-16 encoded Unicode no table */
+ ret = c << 8;
+ if (j--) c = *t++; /* get second octet */
+ else return U8G_ENDSTRI; /* empty string */
+ ret |= c;
+ /* surrogate? */
+ if ((ret >= UTF16_SURR) && (ret <= UTF16_MAXSURR)) {
+ /* invalid first surrogate */
+ if ((ret > UTF16_SURRHEND) || (j < 2)) return U8G_NOTUTF8;
+ j -= 2; /* count two octets */
+ d = (*t++) << 8; /* first octet of second surrogate */
+ d |= *t++; /* second octet of second surrogate */
+ if ((d < UTF16_SURRL) || (d > UTF16_SURRLEND)) return U8G_NOTUTF8;
+ ret = UTF16_BASE + ((ret & UTF16_MASK) << UTF16_SHIFT) +
+ (d & UTF16_MASK);
+ }
+ break;
+ default: /* unknown/unsupported character set type */
+ return U8G_NOTUTF8;
+ }
+ *s = t; /* update pointer and counter */
+ *i = j;
+ return ret;
+}
+
+/* Produce charset validity map for BMP
+ * Accepts: list of charsets to map
+ * Returns: validity map, indexed by BMP codepoint
+ *
+ * Bit 0x1 is the "not-CJK" character bit
+ */
+
+unsigned long *utf8_csvalidmap (char *charsets[])
+{
+ unsigned short u,*tab;
+ unsigned int m,ku,ten;
+ unsigned long i,csi,csb;
+ struct utf8_eucparam *param,*p2;
+ char *s;
+ const CHARSET *cs;
+ unsigned long *ret = (unsigned long *)
+ fs_get (i = 0x10000 * sizeof (unsigned long));
+ memset (ret,0,i); /* zero the entire vector */
+ /* mark all the non-CJK codepoints */
+ /* U+0000 - U+2E7F non-CJK */
+ for (i = 0; i < 0x2E7F; ++i) ret[i] = 0x1;
+ /* U+2E80 - U+2EFF CJK Radicals Supplement
+ * U+2F00 - U+2FDF Kangxi Radicals
+ * U+2FE0 - U+2FEF unassigned
+ * U+2FF0 - U+2FFF Ideographic Description Characters
+ * U+3000 - U+303F CJK Symbols and Punctuation
+ * U+3040 - U+309F Hiragana
+ * U+30A0 - U+30FF Katakana
+ * U+3100 - U+312F BoPoMoFo
+ * U+3130 - U+318F Hangul Compatibility Jamo
+ * U+3190 - U+319F Kanbun
+ * U+31A0 - U+31BF BoPoMoFo Extended
+ * U+31C0 - U+31EF CJK Strokes
+ * U+31F0 - U+31FF Katakana Phonetic Extensions
+ * U+3200 - U+32FF Enclosed CJK Letters and Months
+ * U+3300 - U+33FF CJK Compatibility
+ * U+3400 - U+4DBF CJK Unified Ideographs Extension A
+ * U+4DC0 - U+4DFF Yijing Hexagram Symbols
+ * U+4E00 - U+9FFF CJK Unified Ideographs
+ * U+A000 - U+A48F Yi Syllables
+ * U+A490 - U+A4CF Yi Radicals
+ * U+A700 - U+A71F Modifier Tone Letters
+ */
+ for (i = 0xa720; i < 0xabff; ++i) ret[i] = 0x1;
+ /* U+AC00 - U+D7FF Hangul Syllables */
+ for (i = 0xd800; i < 0xf8ff; ++i) ret[i] = 0x1;
+ /* U+F900 - U+FAFF CJK Compatibility Ideographs */
+ for (i = 0xfb00; i < 0xfe2f; ++i) ret[i] = 0x1;
+ /* U+FE30 - U+FE4F CJK Compatibility Forms
+ * U+FE50 - U+FE6F Small Form Variants (for CNS 11643)
+ */
+ for (i = 0xfe70; i < 0xfeff; ++i) ret[i] = 0x1;
+ /* U+FF00 - U+FFEF CJK Compatibility Ideographs */
+ for (i = 0xfff0; i < 0x10000; ++i) ret[i] = 0x1;
+
+ /* for each supplied charset */
+ for (csi = 1; ret && charsets && (s = charsets[csi - 1]); ++csi) {
+ /* substitute EUC-JP for ISO-2022-JP */
+ if (!compare_cstring (s,"ISO-2022-JP")) s = "EUC-JP";
+ /* look up charset */
+ if (cs = utf8_charset (s)) {
+ csb = 1 << csi; /* charset bit */
+ switch (cs->type) {
+ case CT_ASCII: /* 7-bit ASCII no table */
+ case CT_1BYTE0: /* 1 byte no table */
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ case CT_SJIS: /* 2 byte Shift-JIS */
+ /* supported charset type, all ASCII is OK */
+ for (i = 0; i < 128; ++i) ret[i] |= csb;
+ break;
+ default: /* unsupported charset type */
+ fs_give ((void **) &ret);
+ break;
+ }
+ /* now do additional operations */
+ if (ret) switch (cs->type) {
+ case CT_1BYTE0: /* 1 byte no table */
+ for (i = 128; i < 256; i++) ret[i] |= csb;
+ break;
+ case CT_1BYTE: /* 1 byte ASCII + table 0x80-0xff */
+ for (tab = (unsigned short *) cs->tab,i = 128; i < 256; i++)
+ if (tab[i & BITS7] != UBOGON) ret[tab[i & BITS7]] |= csb;
+ break;
+ case CT_1BYTE8: /* 1 byte table 0x00 - 0xff */
+ for (tab = (unsigned short *) cs->tab,i = 0; i < 256; i++)
+ if (tab[i] != UBOGON) ret[tab[i]] |= csb;
+ break;
+ case CT_EUC: /* 2 byte ASCII + utf8_eucparam base/CS2/CS3 */
+ for (param = (struct utf8_eucparam *) cs->tab,
+ tab = (unsigned short *) param->tab, ku = 0;
+ ku < param->max_ku; ku++)
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * param->max_ten) + ten]) != UBOGON)
+ ret[u] |= csb;
+ break;
+
+ case CT_DBYTE: /* 2 byte ASCII + utf8_eucparam */
+ for (param = (struct utf8_eucparam *) cs->tab,
+ tab = (unsigned short *) param->tab, ku = 0;
+ ku < param->max_ku; ku++)
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * param->max_ten) + ten]) != UBOGON)
+ ret[u] |= csb;
+ break;
+ case CT_DBYTE2: /* 2 byte ASCII + utf8_eucparam plane1/2 */
+ param = (struct utf8_eucparam *) cs->tab;
+ p2 = param + 1; /* plane 2 parameters */
+ /* only ten parameters should differ */
+ if ((param->base_ku != p2->base_ku) || (param->max_ku != p2->max_ku))
+ fatal ("ku definition error for CT_DBYTE2 charset");
+ /* total codepoints in each ku */
+ m = param->max_ten + p2->max_ten;
+ tab = (unsigned short *) param->tab;
+ for (ku = 0; ku < param->max_ku; ku++) {
+ for (ten = 0; ten < param->max_ten; ten++)
+ if ((u = tab[(ku * m) + ten]) != UBOGON)
+ ret[u] |= csb;
+ for (ten = 0; ten < p2->max_ten; ten++)
+ if ((u = tab[(ku * m) + param->max_ten + ten]) != UBOGON)
+ ret[u] |= csb;
+ }
+ break;
+ case CT_SJIS: /* 2 byte Shift-JIS */
+ for (ku = 0; ku < MAX_JIS0208_KU; ku++)
+ for (ten = 0; ten < MAX_JIS0208_TEN; ten++)
+ if ((u = jis0208tab[ku][ten]) != UBOGON) ret[u] |= csb;
+ /* JIS hankaku katakana */
+ for (u = 0; u < (MAX_KANA_8 - MIN_KANA_8); u++)
+ ret[UCS2_KATAKANA + u] |= csb;
+ break;
+ }
+ }
+ /* invalid charset, punt */
+ else fs_give ((void **) &ret);
+ }
+ return ret;
+}
+
+/* Infer charset from unlabelled sized text
+ * Accepts: sized text
+ * Returns: charset if one inferred, or NIL if unknown
+ */
+
+const CHARSET *utf8_infercharset (SIZEDTEXT *src)
+{
+ long iso2022jp = NIL;
+ long eightbit = NIL;
+ unsigned long i;
+ /* look for ISO 2022 */
+ if (src) for (i = 0; i < src->size; i++) {
+ /* ESC sequence? */
+ if ((src->data[i] == I2C_ESC) && (++i < src->size)) switch (src->data[i]) {
+ case I2C_MULTI: /* yes, multibyte? */
+ if (++i < src->size) switch (src->data[i]) {
+ case I2CS_94x94_JIS_OLD: /* JIS X 0208-1978 */
+ case I2CS_94x94_JIS_NEW: /* JIS X 0208-1983 */
+ case I2CS_94x94_JIS_EXT: /* JIS X 0212-1990 (kludge...) */
+ iso2022jp = T; /* found an ISO-2022-JP sequence */
+ break;
+ default: /* other multibyte */
+ return NIL; /* definitely invalid */
+ }
+ break;
+ case I2C_G0_94: /* single byte */
+ if (++i < src->size) switch (src->data[i]) {
+ case I2CS_94_JIS_BUGROM: /* in case old buggy software */
+ case I2CS_94_JIS_ROMAN: /* JIS X 0201-1976 left half */
+ case I2CS_94_ASCII: /* ASCII */
+ case I2CS_94_BRITISH: /* good enough for gov't work */
+ break;
+ default: /* other 94 single byte */
+ return NIL; /* definitely invalid */
+ }
+ }
+ /* if possible UTF-8 and not ISO-2022-JP */
+ else if (!iso2022jp && (eightbit >= 0) && (src->data[i] & BIT8) &&
+ (eightbit = utf8_validate (src->data + i,src->size - i)) > 0)
+ i += eightbit - 1; /* skip past all but last of UTF-8 char */
+ }
+ /* ISO-2022-JP overrides other guesses */
+ if (iso2022jp) return utf8_charset ("ISO-2022-JP");
+ if (eightbit > 0) return utf8_charset ("UTF-8");
+ return eightbit ? NIL : utf8_charset ("US-ASCII");
+}
+
+
+/* Validate that character at this position is UTF-8
+ * Accepts: string pointer
+ * size of remaining string
+ * Returns: size of UTF-8 character in octets or -1 if not UTF-8
+ */
+
+long utf8_validate (unsigned char *s,unsigned long i)
+{
+ unsigned long j = i;
+ return (utf8_get (&s,&i) & U8G_ERROR) ? -1 : j - i;
+}
+
+/* Convert ISO 8859-1 to UTF-8
+ * Accepts: source sized text
+ * pointer to return sized text
+ * canonicalization function
+ */
+
+void utf8_text_1byte0 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int c;
+ for (ret->size = i = 0; i < text->size;) {
+ c = text->data[i++];
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] =NIL;
+ for (i = 0; i < text->size;) {
+ c = text->data[i++];
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 to UTF-8 */
+ }
+}
+
+
+/* Convert single byte ASCII+8bit character set sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to return sized text
+ * conversion table
+ * canonicalization function
+ */
+
+void utf8_text_1byte (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int c;
+ unsigned short *tbl = (unsigned short *) tab;
+ for (ret->size = i = 0; i < text->size;) {
+ if ((c = text->data[i++]) & BIT8) c = tbl[c & BITS7];
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] =NIL;
+ for (i = 0; i < text->size;) {
+ if ((c = text->data[i++]) & BIT8) c = tbl[c & BITS7];
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 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
+ * canonicalization function
+ */
+
+void utf8_text_1byte8 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int c;
+ unsigned short *tbl = (unsigned short *) tab;
+ for (ret->size = i = 0; i < text->size;) {
+ c = tbl[text->data[i++]];
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] =NIL;
+ for (i = 0; i < text->size;) {
+ c = tbl[text->data[i++]];
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 to UTF-8 */
+ }
+}
+
+/* Convert EUC sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to return sized text
+ * EUC parameter table
+ * canonicalization function
+ */
+
+void utf8_text_euc (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ 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,s = NIL,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 = UBOGON; /* 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] : UBOGON;
+ else c = ((c1 >= p2->base_ku) && (c1 < p2->max_ku)) ?
+ c1 + ((unsigned long) p2->tab) : UBOGON;
+ }
+ else { /* CS2 not set up */
+ c = UBOGON; /* 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] : UBOGON;
+ else c = ((c1 >= p3->base_ku) && (c1 < p3->max_ku)) ?
+ c1 + ((unsigned long) p3->tab) : UBOGON;
+ }
+ else { /* CS3 not set up */
+ c = UBOGON; /* swallow byte, say bogon */
+ if (i < text->size) i++;
+ }
+ break;
+
+ default:
+ if (((ku = (c & BITS7) - p1->base_ku) >= p1->max_ku) ||
+ ((ten = (c1 & BITS7) - p1->base_ten) >= p1->max_ten)) c = UBOGON;
+ else if (((c = t1[(ku*p1->max_ten) + ten]) == UBOGON) &&
+ /* special hack for JIS X 0212: merge rows less than 10 */
+ ku && (ku < 10) && t3 && p3->base_ten)
+ c = t3[((ku - (p3->base_ku - p1->base_ku))*p3->max_ten) + ten];
+ }
+ }
+ /* convert if second pass */
+ if (pass) UTF8_WRITE_BMP (s,c,cv,de)
+ else UTF8_COUNT_BMP (ret->size,c,cv,de);
+ }
+ if (!pass) (s = ret->data = (unsigned char *)
+ fs_get (ret->size + 1))[ret->size] =NIL;
+ }
+}
+
+
+/* Convert ASCII + double-byte sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to return sized text
+ * conversion table
+ * canonicalization function
+ */
+
+void utf8_text_dbyte (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ 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;) {
+ if ((c = text->data[i++]) & BIT8) {
+ /* special hack for GBK: 0x80 is Euro */
+ if ((c == 0x80) && (t1 == (unsigned short *) gb2312tab)) c = UCS2_EURO;
+ else 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] : UBOGON;
+ }
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ for (i = 0; i < text->size;) {
+ if ((c = text->data[i++]) & BIT8) {
+ /* special hack for GBK: 0x80 is Euro */
+ if ((c == 0x80) && (t1 == (unsigned short *) gb2312tab)) c = UCS2_EURO;
+ else 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] : UBOGON;
+ }
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 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
+ * canonicalization function
+ */
+
+void utf8_text_dbyte2 (SIZEDTEXT *text,SIZEDTEXT *ret,void *tab,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ unsigned long i;
+ 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;) {
+ if ((c = text->data[i++]) & BIT8) {
+ if ((i >= text->size) || !(c1 = text->data[i++]))
+ c = UBOGON; /* 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] :UBOGON;
+ 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] : UBOGON;
+ }
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ for (i = 0; i < text->size;) {
+ if ((c = text->data[i++]) & BIT8) {
+ if ((i >= text->size) || !(c1 = text->data[i++]))
+ c = UBOGON; /* 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] :UBOGON;
+ 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] : UBOGON;
+ }
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 to UTF-8 */
+ }
+}
+
+#ifdef JISTOUNICODE /* Japanese */
+/* Convert Shift JIS sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to return sized text
+ * canonicalization function
+ */
+
+void utf8_text_sjis (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,
+ ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int c,c1,ku,ten;
+ for (ret->size = 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 if (i >= text->size) c = UBOGON;
+ else { /* Shift-JIS */
+ c1 = text->data[i++];
+ SJISTOJIS (c,c1);
+ c = JISTOUNICODE (c,c1,ku,ten);
+ }
+ }
+ /* compromise - do yen sign but not overline */
+ else if (c == JISROMAN_YEN) c = UCS2_YEN;
+ UTF8_COUNT_BMP (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ 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);
+ }
+ }
+ /* compromise - do yen sign but not overline */
+ else if (c == JISROMAN_YEN) c = UCS2_YEN;
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 to UTF-8 */
+ }
+}
+#endif
+
+/* Convert ISO-2022 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_2022 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int pass,state,c,co,gi,gl,gr,g[4],ku,ten;
+ for (pass = 0,s = NIL,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 == BRITISH_POUNDSTERLING) c = UCS2_POUNDSTERLING;
+ break;
+ case I2CS_JIS_ROMAN: /* JIS Roman */
+ case I2CS_JIS_BUGROM: /* old bugs */
+ switch (c) { /* two exceptions to ASCII */
+ case JISROMAN_YEN: /* Yen sign */
+ c = UCS2_YEN;
+ break;
+ /* overline */
+ case JISROMAN_OVERLINE:
+ c = UCS2_OVERLINE;
+ break;
+ }
+ break;
+ case I2CS_JIS_KANA: /* JIS hankaku 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: /* Latin-7 (Baltic) */
+ c = iso8859_13tab[c];
+ break;
+ case I2CS_VSCII: /* Vietnamese */
+ c = visciitab[c];
+ break;
+ case I2CS_ISO8859_14: /* Latin-8 (Celtic) */
+ c = iso8859_14tab[c];
+ break;
+ case I2CS_ISO8859_15: /* Latin-9 (Euro) */
+ c = iso8859_15tab[c];
+ break;
+ case I2CS_ISO8859_16: /* Latin-10 (Baltic) */
+ c = iso8859_16tab[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 */
+ co |= BIT8; /* make into EUC */
+ c |= BIT8;
+ 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
+#ifdef CNS3TOUNICODE
+ case I2CS_CNS3: /* CNS 11643 plane 3 */
+ c = CNS3TOUNICODE (co,c,ku,ten);
+ break;
+#endif
+#ifdef CNS4TOUNICODE
+ case I2CS_CNS4: /* CNS 11643 plane 4 */
+ c = CNS4TOUNICODE (co,c,ku,ten);
+ break;
+#endif
+#ifdef CNS5TOUNICODE
+ case I2CS_CNS5: /* CNS 11643 plane 5 */
+ c = CNS5TOUNICODE (co,c,ku,ten);
+ break;
+#endif
+#ifdef CNS6TOUNICODE
+ case I2CS_CNS6: /* CNS 11643 plane 6 */
+ c = CNS6TOUNICODE (co,c,ku,ten);
+ break;
+#endif
+#ifdef CNS7TOUNICODE
+ case I2CS_CNS7: /* CNS 11643 plane 7 */
+ c = CNS7TOUNICODE (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 */
+ }
+ /* convert if second pass */
+ if (pass) UTF8_WRITE_BMP (s,c,cv,de)
+ else UTF8_COUNT_BMP (ret->size,c,cv,de);
+ }
+ }
+ }
+ if (!pass) (s = ret->data = (unsigned char *)
+ fs_get (ret->size + 1))[ret->size] = NIL;
+ else if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("ISO-2022 to UTF-8 botch");
+ }
+}
+
+/* Convert UTF-7 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_utf7 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s;
+ unsigned int c,c1,d,uc,pass,e,e1,state,surrh;
+ for (pass = 0,s = NIL,ret->size = 0; pass <= 1; pass++) {
+ c1 = d = uc = e = e1 = 0;
+ for (i = 0,state = NIL; i < text->size;) {
+ c = text->data[i++]; /* get next byte */
+ switch (state) {
+ case U7_PLUS: /* previous character was + */
+ if (c == '-') { /* +- means textual + */
+ c = '+';
+ state = U7_ASCII; /* revert to ASCII */
+ break;
+ }
+ state = U7_UNICODE; /* enter Unicode state */
+ e = e1 = 0; /* initialize Unicode quantum position */
+ case U7_UNICODE: /* Unicode state */
+ if (c == '-') state = U7_MINUS;
+ else { /* decode Unicode */
+ /* don't use isupper/islower since this is ASCII only */
+ if ((c >= 'A') && (c <= 'Z')) c -= 'A';
+ else if ((c >= 'a') && (c <= 'z')) c -= 'a' - 26;
+ else if (isdigit (c)) c -= '0' - 52;
+ else if (c == '+') c = 62;
+ else if (c == '/') c = 63;
+ else state = U7_ASCII;/* end of modified BASE64 */
+ }
+ break;
+ case U7_MINUS: /* previous character was absorbed - */
+ state = U7_ASCII; /* revert to ASCII */
+ case U7_ASCII: /* ASCII state */
+ if (c == '+') state = U7_PLUS;
+ break;
+ }
+
+ switch (state) { /* store character if in character mode */
+ case U7_UNICODE: /* Unicode */
+ switch (e++) { /* install based on BASE64 state */
+ case 0:
+ c1 = c << 2; /* byte 1: high 6 bits */
+ break;
+ case 1:
+ d = c1 | (c >> 4); /* byte 1: low 2 bits */
+ c1 = c << 4; /* byte 2: high 4 bits */
+ break;
+ case 2:
+ d = c1 | (c >> 2); /* byte 2: low 4 bits */
+ c1 = c << 6; /* byte 3: high 2 bits */
+ break;
+ case 3:
+ d = c | c1; /* byte 3: low 6 bits */
+ e = 0; /* reinitialize mechanism */
+ break;
+ }
+ if (e == 1) break; /* done if first BASE64 state */
+ if (!e1) { /* first byte of UCS-2 character */
+ uc = (d & 0xff) << 8; /* note first byte */
+ e1 = T; /* enter second UCS-2 state */
+ break; /* done */
+ }
+ c = uc | (d & 0xff); /* build UCS-2 character */
+ e1 = NIL; /* back to first UCS-2 state, drop in */
+ /* surrogate pair? */
+ if ((c >= UTF16_SURR) && (c <= UTF16_MAXSURR)) {
+ /* save high surrogate for later */
+ if (c < UTF16_SURRL) surrh = c;
+ else c = UTF16_BASE + ((surrh & UTF16_MASK) << UTF16_SHIFT) +
+ (c & UTF16_MASK);
+ break; /* either way with surrogates, we're done */
+ }
+ case U7_ASCII: /* just install if ASCII */
+ /* convert if second pass */
+ if (pass) UTF8_WRITE_BMP (s,c,cv,de)
+ else UTF8_COUNT_BMP (ret->size,c,cv,de);
+ }
+ }
+ if (!pass) (s = ret->data = (unsigned char *)
+ fs_get (ret->size + 1))[ret->size] = NIL;
+ else if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("UTF-7 to UTF-8 botch");
+ }
+}
+
+
+/* Convert UTF-8 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_utf8 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i,c;
+ unsigned char *s,*t;
+ for (ret->size = 0, t = text->data, i = text->size; i;) {
+ if ((c = utf8_get (&t,&i)) & U8G_ERROR) {
+ ret->data = text->data; /* conversion failed */
+ ret->size = text->size;
+ return;
+ }
+ UTF8_COUNT (ret->size,c,cv,de)
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] =NIL;
+ for (t = text->data, i = text->size; i;) {
+ c = utf8_get (&t,&i);
+ UTF8_WRITE (s,c,cv,de) /* convert UCS-4 to UTF-8 */
+ }
+ if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("UTF-8 to UTF-8 botch");
+}
+
+/* Convert UCS-2 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_ucs2 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s,*t;
+ unsigned int c;
+ for (ret->size = 0, t = text->data, i = text->size / 2; i; --i) {
+ c = *t++ << 8;
+ c |= *t++;
+ UTF8_COUNT_BMP (ret->size,c,cv,de);
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ for (t = text->data, i = text->size / 2; i; --i) {
+ c = *t++ << 8;
+ c |= *t++;
+ UTF8_WRITE_BMP (s,c,cv,de) /* convert UCS-2 to UTF-8 */
+ }
+ if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("UCS-2 to UTF-8 botch");
+}
+
+
+/* Convert UCS-4 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_ucs4 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s,*t;
+ unsigned long c;
+ for (ret->size = 0, t = text->data, i = text->size / 4; i; --i) {
+ c = *t++ << 24; c |= *t++ << 16; c |= *t++ << 8; c |= *t++;
+ UTF8_COUNT (ret->size,c,cv,de);
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ for (t = text->data, i = text->size / 2; i; --i) {
+ c = *t++ << 24; c |= *t++ << 16; c |= *t++ << 8; c |= *t++;
+ UTF8_WRITE (s,c,cv,de) /* convert UCS-4 to UTF-8 */
+ }
+ if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("UCS-4 to UTF-8 botch");
+}
+
+/* Convert UTF-16 sized text to UTF-8
+ * Accepts: source sized text
+ * pointer to returned sized text
+ * canonicalization function
+ */
+
+void utf8_text_utf16 (SIZEDTEXT *text,SIZEDTEXT *ret,ucs4cn_t cv,ucs4de_t de)
+{
+ unsigned long i;
+ unsigned char *s,*t;
+ unsigned long c,d;
+ for (ret->size = 0, t = text->data, i = text->size / 2; i; --i) {
+ c = *t++ << 8;
+ c |= *t++;
+ /* possible surrogate? */
+ if ((c >= UTF16_SURR) && (c <= UTF16_MAXSURR)) {
+ /* invalid first surrogate */
+ if ((c > UTF16_SURRHEND) || !i) c = UBOGON;
+ else { /* get second surrogate */
+ d = *t++ << 8;
+ d |= *t++;
+ --i; /* swallowed another 16-bits */
+ /* invalid second surrogate */
+ if ((d < UTF16_SURRL) || (d > UTF16_SURRLEND)) c = UBOGON;
+ else c = UTF16_BASE + ((c & UTF16_MASK) << UTF16_SHIFT) +
+ (d & UTF16_MASK);
+ }
+ }
+ UTF8_COUNT (ret->size,c,cv,de);
+ }
+ (s = ret->data = (unsigned char *) fs_get (ret->size + 1))[ret->size] = NIL;
+ for (t = text->data, i = text->size / 2; i; --i) {
+ c = *t++ << 8;
+ c |= *t++;
+ /* possible surrogate? */
+ if ((c >= UTF16_SURR) && (c <= UTF16_MAXSURR)) {
+ /* invalid first surrogate */
+ if ((c > UTF16_SURRHEND) || !i) c = UBOGON;
+ else { /* get second surrogate */
+ d = *t++ << 8;
+ d |= *t++;
+ --i; /* swallowed another 16-bits */
+ /* invalid second surrogate */
+ if ((d < UTF16_SURRL) || (d > UTF16_SURRLEND)) c = UBOGON;
+ else c = UTF16_BASE + ((c & UTF16_MASK) << UTF16_SHIFT) +
+ (d & UTF16_MASK);
+ }
+ }
+ UTF8_WRITE (s,c,cv,de) /* convert UCS-4 to UTF-8 */
+ }
+ if (((unsigned long) (s - ret->data)) != ret->size)
+ fatal ("UTF-16 to UTF-8 botch");
+}
+
+/* Size of UCS-4 character, possibly not in BMP, as UTF-8 octets
+ * Accepts: character
+ * Returns: size (0 means bogon)
+ *
+ * Use UTF8_SIZE macro if known to be in the BMP
+ */
+
+unsigned long utf8_size (unsigned long c)
+{
+ if (c < 0x80) return 1;
+ else if (c < 0x800) return 2;
+ else if (c < 0x10000) return 3;
+ else if (c < 0x200000) return 4;
+ else if (c < 0x4000000) return 5;
+ else if (c < 0x80000000) return 6;
+ return 0;
+}
+
+
+/* Put UCS-4 character, possibly not in BMP, as UTF-8 octets
+ * Accepts: destination string pointer
+ * character
+ * Returns: updated destination pointer
+ *
+ * Use UTF8_PUT_BMP macro if known to be in the BMP
+ */
+
+unsigned char *utf8_put (unsigned char *s,unsigned long c)
+{
+ unsigned char mark[6] = {0x00,0xc0,0xe0,0xf0,0xf8,0xfc};
+ unsigned long size = utf8_size (c);
+ switch (size) {
+ case 6:
+ s[5] = 0x80 | (unsigned char) (c & 0x3f);
+ c >>= 6;
+ case 5:
+ s[4] = 0x80 | (unsigned char) (c & 0x3f);
+ c >>= 6;
+ case 4:
+ s[3] = 0x80 | (unsigned char) (c & 0x3f);
+ c >>= 6;
+ case 3:
+ s[2] = 0x80 | (unsigned char) (c & 0x3f);
+ c >>= 6;
+ case 2:
+ s[1] = 0x80 | (unsigned char) (c & 0x3f);
+ c >>= 6;
+ case 1:
+ *s = mark[size-1] | (unsigned char) (c & 0x7f);
+ break;
+ }
+ return s + size;
+}
+
+/* Return title case of a fixed-width UCS-4 character
+ * Accepts: character
+ * Returns: title case of character
+ */
+
+unsigned long ucs4_titlecase (unsigned long c)
+{
+ if (c <= UCS4_TMAPMAX) return ucs4_tmaptab[c];
+ if (c < UCS4_TMAPHIMIN) return c;
+ if (c <= UCS4_TMAPHIMAX) return c - UCS4_TMAPHIMAP;
+ if (c < UCS4_TMAPDESERETMIN) return c;
+ if (c <= UCS4_TMAPDESERETMAX) return c - UCS4_TMAPDESERETMAP;
+ return c;
+}
+
+
+/* Return width of a fixed-width UCS-4 character in planes 0-2
+ * Accepts: character
+ * Returns: width (0, 1, 2) or negative error condition if not valid
+ */
+
+long ucs4_width (unsigned long c)
+{
+ long ret;
+ /* out of range, not-a-char, or surrogates */
+ if ((c > UCS4_MAXUNICODE) || ((c & 0xfffe) == 0xfffe) ||
+ ((c >= UTF16_SURR) && (c <= UTF16_MAXSURR))) ret = U4W_NOTUNCD;
+ /* private-use */
+ else if (c >= UCS4_PVTBASE) ret = U4W_PRIVATE;
+ /* SSP are not printing characters */
+ else if (c >= UCS4_SSPBASE) ret = U4W_SSPCHAR;
+ /* unassigned planes */
+ else if (c >= UCS4_UNABASE) ret = U4W_UNASSGN;
+ /* SIP and reserved plane 3 are wide */
+ else if (c >= UCS4_SIPBASE) ret = 2;
+#if (UCS4_WIDLEN != UCS4_SIPBASE)
+#error "UCS4_WIDLEN != UCS4_SIPBASE"
+#endif
+ /* C0/C1 controls */
+ else if ((c <= UCS2_C0CONTROLEND) ||
+ ((c >= UCS2_C1CONTROL) && (c <= UCS2_C1CONTROLEND)))
+ ret = U4W_CONTROL;
+ /* BMP and SMP get value from table */
+ else switch (ret = (ucs4_widthtab[(c >> 2)] >> ((3 - (c & 0x3)) << 1)) &0x3){
+ case 0: /* zero-width */
+ if (c == 0x00ad) ret = 1; /* force U+00ad (SOFT HYPHEN) to width 1 */
+ case 1: /* single-width */
+ case 2: /* double-width */
+ break;
+ case 3: /* ambiguous width */
+ ret = (c >= 0x2100) ? 2 : 1;/* need to do something better than this */
+ break;
+ }
+ return ret;
+}
+
+/* Return screen width of UTF-8 string
+ * Accepts: string
+ * Returns: width or negative if not valid UTF-8
+ */
+
+long utf8_strwidth (unsigned char *s)
+{
+ unsigned long c,i,ret;
+ /* go through string */
+ for (ret = 0; *s; ret += ucs4_width (c)) {
+ /* It's alright to give a fake value for the byte count to utf8_get()
+ * since the null of a null-terminated string will stop processing anyway.
+ */
+ i = 6; /* fake value */
+ if ((c = utf8_get (&s,&i)) & U8G_ERROR) return -1;
+ }
+ return ret;
+}
+
+
+/* Return screen width of UTF-8 text
+ * Accepts: SIZEDTEXT to string
+ * Returns: width or negative if not valid UTF-8
+ */
+
+long utf8_textwidth (SIZEDTEXT *utf8)
+{
+ unsigned long c;
+ unsigned char *s = utf8->data;
+ unsigned long i = utf8->size;
+ unsigned long ret = 0;
+ while (i) { /* while there's a string to process */
+ if ((c = utf8_get (&s,&i)) & U8G_ERROR) return -1;
+ ret += ucs4_width (c);
+ }
+ return ret;
+}
+
+/* Decomposition (phew!) */
+
+#define MORESINGLE 1 /* single UCS-4 tail value */
+#define MOREMULTIPLE 2 /* multiple UCS-2 tail values */
+
+struct decomposemore {
+ short type; /* type of more */
+ union {
+ unsigned long single; /* single decomposed value */
+ struct { /* multiple BMP values */
+ unsigned short *next;
+ unsigned long count;
+ } multiple;
+ } data;
+};
+
+#define RECURSIVEMORE struct recursivemore
+
+RECURSIVEMORE {
+ struct decomposemore *more;
+ RECURSIVEMORE *next;
+};
+
+
+/* Return decomposition of a UCS-4 character
+ * Accepts: character or U8G_ERROR to return next from "more"
+ * pointer to returned more
+ * Returns: [next] decomposed value, more set if still more decomposition
+ */
+
+unsigned long ucs4_decompose (unsigned long c,void **more)
+{
+ unsigned long i,ix,ret;
+ struct decomposemore *m;
+ if (c & U8G_ERROR) { /* want to chase more? */
+ /* do sanity check */
+ if (m = (struct decomposemore *) *more) switch (m->type) {
+ case MORESINGLE: /* single value */
+ ret = m->data.single;
+ fs_give (more); /* no more decomposition */
+ break;
+ case MOREMULTIPLE: /* multiple value */
+ ret = *m->data.multiple.next++;
+ if (!--m->data.multiple.count) fs_give (more);
+ break;
+ default: /* uh-oh */
+ fatal ("invalid more block argument to ucs4_decompose!");
+ }
+ else fatal ("no more block provided to ucs4_decompose!");
+ }
+
+ else { /* start decomposition */
+ *more = NIL; /* initially set no more */
+ /* BMP low decompositions */
+ if (c < UCS4_BMPLOMIN) ret = c;
+ /* fix this someday */
+ else if (c == UCS4_BMPLOMIN) ret = ucs4_dbmplotab[0];
+ else if (c <= UCS4_BMPLOMAX) {
+ /* within range - have a decomposition? */
+ if (i = ucs4_dbmploixtab[c - UCS4_BMPLOMIN]) {
+ /* get first value of decomposition */
+ ret = ucs4_dbmplotab[ix = i & UCS4_BMPLOIXMASK];
+ /* has continuation? */
+ if (i & UCS4_BMPLOSIZEMASK) {
+ m = (struct decomposemore *)
+ (*more = memset (fs_get (sizeof (struct decomposemore)),0,
+ sizeof (struct decomposemore)));
+ m->type = MOREMULTIPLE;
+ m->data.multiple.next = &ucs4_dbmplotab[++ix];
+ m->data.multiple.count = i >> UCS4_BMPLOSIZESHIFT;
+ }
+ }
+ else ret = c; /* in range but doesn't decompose */
+ }
+ /* BMP CJK compatibility */
+ else if (c < UCS4_BMPCJKMIN) ret = c;
+ else if (c <= UCS4_BMPCJKMAX) {
+ if (!(ret = ucs4_bmpcjk1decomptab[c - UCS4_BMPCJKMIN])) ret = c;
+ }
+ /* BMP CJK compatibility - some not in BMP */
+#if UCS4_BMPCJK2MIN - (UCS4_BMPCJKMAX + 1)
+ else if (c < UCS4_BMPCJK2MIN) ret = c;
+#endif
+ else if (c <= UCS4_BMPCJK2MAX)
+ ret = ucs4_bmpcjk2decomptab[c - UCS4_BMPCJK2MIN];
+ /* BMP high decompositions */
+ else if (c < UCS4_BMPHIMIN) ret = c;
+ else if (c <= UCS4_BMPHIMAX) {
+ /* within range - have a decomposition? */
+ if (i = ucs4_dbmphiixtab[c - UCS4_BMPHIMIN]) {
+ /* get first value of decomposition */
+ ret = ucs4_dbmphitab[ix = i & UCS4_BMPHIIXMASK];
+ /* has continuation? */
+ if (i & UCS4_BMPHISIZEMASK) {
+ m = (struct decomposemore *)
+ (*more = memset (fs_get (sizeof (struct decomposemore)),0,
+ sizeof (struct decomposemore)));
+ m->type = MOREMULTIPLE;
+ m->data.multiple.next = &ucs4_dbmphitab[++ix];
+ m->data.multiple.count = i >> UCS4_BMPHISIZESHIFT;
+ }
+ }
+ else ret = c; /* in range but doesn't decompose */
+ }
+
+ /* BMP half and full width forms */
+ else if (c < UCS4_BMPHALFFULLMIN) ret = c;
+ else if (c <= UCS4_BMPHALFFULLMAX) {
+ if (!(ret = ucs4_bmphalffulldecomptab[c - UCS4_BMPHALFFULLMIN])) ret = c;
+ }
+ /* SMP music */
+ else if (c < UCS4_SMPMUSIC1MIN) ret = c;
+ else if (c <= UCS4_SMPMUSIC1MAX) {
+ ret = ucs4_smpmusic1decomptab[c -= UCS4_SMPMUSIC1MIN][0];
+ m = (struct decomposemore *)
+ (*more = memset (fs_get (sizeof (struct decomposemore)),0,
+ sizeof (struct decomposemore)));
+ m->type = MORESINGLE;
+ m->data.single = ucs4_smpmusic1decomptab[c][1];
+ }
+ else if (c < UCS4_SMPMUSIC2MIN) ret = c;
+ else if (c <= UCS4_SMPMUSIC2MAX) {
+ ret = ucs4_smpmusic2decomptab[c -= UCS4_SMPMUSIC2MIN][0];
+ m = (struct decomposemore *)
+ (*more = memset (fs_get (sizeof (struct decomposemore)),0,
+ sizeof (struct decomposemore)));
+ m->type = MORESINGLE;
+ m->data.single = ucs4_smpmusic2decomptab[c][1];
+ }
+ /* SMP mathematical forms */
+ else if (c < UCS4_SMPMATHMIN) ret = c;
+ else if (c <= UCS4_SMPMATHMAX) {
+ if (!(ret = ucs4_smpmathdecomptab[c - UCS4_SMPMATHMIN])) ret = c;
+ }
+ /* CJK compatibility ideographs in SIP */
+ else if (!(ret = ((c >= UCS4_SIPMIN) && (c <= UCS4_SIPMAX)) ?
+ ucs4_sipdecomptab[c - UCS4_SIPMIN] : c)) ret = c;
+ }
+ return ret;
+}
+
+/* Return recursive decomposition of a UCS-4 character
+ * Accepts: character or U8G_ERROR to return next from "more"
+ * pointer to returned more
+ * Returns: [next] decomposed value, more set if still more decomposition
+ */
+
+unsigned long ucs4_decompose_recursive (unsigned long c,void **more)
+{
+ unsigned long c1;
+ void *m,*mn;
+ RECURSIVEMORE *mr;
+ if (c & U8G_ERROR) { /* want to chase more? */
+ mn = NIL;
+ if (mr = (RECURSIVEMORE *) *more) switch (mr->more->type) {
+ case MORESINGLE: /* decompose single value */
+ c = ucs4_decompose_recursive (mr->more->data.single,&mn);
+ *more = mr->next; /* done with this more, remove it */
+ fs_give ((void **) &mr->more);
+ fs_give ((void **) &mr);
+ break;
+ case MOREMULTIPLE: /* decompose current value in multiple */
+ c = ucs4_decompose_recursive (*mr->more->data.multiple.next++,&mn);
+ /* if done with this multiple decomposition */
+ if (!--mr->more->data.multiple.count) {
+ *more = mr->next; /* done with this more, remove it */
+ fs_give ((void **) &mr->more);
+ fs_give ((void **) &mr);
+ }
+ break;
+ default: /* uh-oh */
+ fatal ("invalid more block argument to ucs4_decompose_recursive!");
+ }
+ else fatal ("no more block provided to ucs4_decompose_recursive!");
+ if (mr = mn) { /* did this value recurse on us? */
+ mr->next = *more; /* yes, insert new more at head */
+ *more = mr;
+ }
+ }
+ else { /* start decomposition */
+ *more = NIL; /* initially set no more */
+ mr = NIL;
+ do { /* repeatedly decompose this codepoint */
+ c = ucs4_decompose (c1 = c,&m);
+ if (m) { /* multi-byte decomposition */
+ if (c1 == c) fatal ("endless multiple decomposition!");
+ /* create a block to stash this more */
+ mr = memset (fs_get (sizeof (RECURSIVEMORE)),0,sizeof (RECURSIVEMORE));
+ mr->more = m; /* note the expansion */
+ mr->next = *more; /* old list is the tail */
+ *more = mr; /* and this is the new head */
+ }
+ } while (c1 != c); /* until nothing more to decompose */
+ }
+ return c;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.44.0) at 2024-06-28 16:02:41 +0000