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authorMatthias Andree <matthias.andree@gmx.de>2004-11-07 16:12:43 +0000
committerMatthias Andree <matthias.andree@gmx.de>2004-11-07 16:12:43 +0000
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Drop file to let us instead bring it into our tree via a vendor branch.
svn path=/trunk/; revision=3971
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diff --git a/norm_charmap.c b/norm_charmap.c
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-/*
- * The Single Unix Specification function nl_langinfo(CODESET)
- * returns the name of the encoding used by the currently selected
- * locale:
- *
- * http://www.opengroup.org/onlinepubs/7908799/xsh/langinfo.h.html
- *
- * Unfortunately the encoding names are not yet standardized.
- * This function knows about the encoding names used on many
- * different systems and converts them where possible into
- * the corresponding MIME charset name registered in
- *
- * http://www.iana.org/assignments/character-sets
- *
- * Please extend it as needed and suggest improvements to the author.
- *
- * Markus.Kuhn@cl.cam.ac.uk -- 2002-03-11
- * Permission to use, copy, modify, and distribute this software
- * for any purpose and without fee is hereby granted. The author
- * disclaims all warranties with regard to this software.
- *
- * Latest version:
- *
- * http://www.cl.cam.ac.uk/~mgk25/ucs/norm_charmap.c
- */
-
-#include <string.h>
-
-#ifdef TEST
-#include <stdio.h>
-#include <locale.h>
-#include <langinfo.h>
-#endif
-
-#define digit(x) ((x) >= '0' && (x) <= '9')
-
-static char buf[16];
-
-char *norm_charmap(char *name)
-{
- char *p;
-
- if (!name)
- return name;
-
- /* Many need no remapping, but they are listed here so you
- * can see what output to expect, and modify for your needs
- * as necessary. */
- if (!strcmp(name, "UTF-8"))
- return "UTF-8";
- if (!strcmp(name, "EUC-JP"))
- return "EUC-JP";
- if (!strcmp(name, "EUC-KR"))
- return "EUC-KR";
- if (!strcmp(name, "EUC-TW"))
- return "EUC-TW";
- if (!strcmp(name, "KOI8-R"))
- return "KOI8-R";
- if (!strcmp(name, "KOI8-U"))
- return "KOI8-U";
- if (!strcmp(name, "GBK"))
- return "GBK";
- if (!strcmp(name, "GB2312"))
- return "GB2312";
- if (!strcmp(name, "GB18030"))
- return "GB18030";
- if (!strcmp(name, "VSCII"))
- return "VSCII";
-
- /* ASCII comes in many names */
- if (!strcmp(name, "ASCII") ||
- !strcmp(name, "US-ASCII") ||
- !strcmp(name, "ANSI_X3.4-1968") ||
- !strcmp(name, "646") ||
- !strcmp(name, "ISO646") ||
- !strcmp(name, "ISO_646.IRV"))
- return "US-ASCII";
-
- /* ISO 8859 will be converted to "ISO-8859-x" */
- if ((p = strstr(name, "8859-"))) {
- memcpy(buf, "ISO-8859-\0\0", 12);
- p += 5;
- if (digit(*p)) {
- buf[9] = *p++;
- if (digit(*p)) buf[10] = *p++;
- return buf;
- }
- }
-
- /* Windows code pages will be converted to "WINDOWS-12xx" */
- if ((p = strstr(name, "CP12"))) {
- memcpy(buf, "WINDOWS-12\0\0", 13);
- p += 4;
- if (digit(*p)) {
- buf[10] = *p++;
- if (digit(*p)) buf[11] = *p++;
- return buf;
- }
- }
-
- /* TIS-620 comes in at least the following two forms */
- if (!strcmp(name, "TIS-620") ||
- !strcmp(name, "TIS620.2533"))
- return "ISO-8859-11";
-
- /* For some, uppercase/lowercase might differ */
- if (!strcmp(name, "Big5") || !strcmp(name, "BIG5"))
- return "Big5";
- if (!strcmp(name, "Big5HKSCS") || !strcmp(name, "BIG5HKSCS"))
- return "Big5HKSCS";
-
- /* I don't know of any implementation of nl_langinfo(CODESET) out
- * there that returns anything else (and I'm not even certain all of
- * the above occur in the wild), but just in case, as a fallback,
- * return the unmodified name. */
-#ifdef TEST
- printf("**** Unknown encoding name '%s'!\n", name);
-#endif
- return name;
-}
-
-/* For a demo, compile with
- *
- * gcc -W -Wall -o norm_charmap -D TEST norm_charmap.c
- *
- * and then test it on all available locales with
- *
- * for i in `locale -a` ; do printf "$i: " ; LC_ALL=$i ./norm_charmap ; done
- */
-
-#ifdef TEST
-int main(int argc, char **argv)
-{
- char *s;
- if (argc > 1)
- s = argv[1];
- else {
- setlocale(LC_CTYPE, "");
- s = nl_langinfo(CODESET);
- }
- printf("%s -> %s\n", s, norm_charmap(s));
- return 0;
-}
-#endif