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/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZGetCharset function.
*
* Created by: Karl Ramm
*
* $Id$
*
* Copyright (c) 2009 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#ifndef lint
static const char rcsid_charset_c[] = "$Id$";
#endif /* lint */
#include <internal.h>
#include <string.h>
#include <locale.h>
#include <langinfo.h>
#include <ctype.h>
#include <iconv.h>
#include <errno.h>
const char *
ZGetCharsetString(char *charset)
{
char *p;
static int once = 1;
if (charset == NULL)
charset = getenv("ZEPHYR_CHARSET");
if (charset == NULL) {
if (once) {
setlocale(LC_ALL, "");
once = 0;
}
charset = nl_langinfo(CODESET);
}
if (charset == NULL)
return ZCHARSET_UNKNOWN;
charset = strdup(charset);
for (p = charset; *p; p++)
*p = toupper(*p);
return charset;
}
unsigned short
ZGetCharset(char *charset)
{
short retval;
charset = (char *)ZGetCharsetString(charset);
if (!strcmp(charset, "NONE") || !strcmp(charset, "UNKNOWN"))
retval = ZCHARSET_UNKNOWN;
else if (!strcmp(charset, "ANSI_X3.4-1968"))
retval = ZCHARSET_ISO_8859_1; /* A hack. */
else if (!strcmp(charset, "ISO-8859-1"))
retval = ZCHARSET_ISO_8859_1;
else if (!strcmp(charset, "UTF-8"))
retval = ZCHARSET_UTF_8;
else
retval = ZCHARSET_UNKNOWN;
free(charset);
return retval;
}
const char *
ZCharsetToString(unsigned short charset)
{
if (charset == ZCHARSET_UNKNOWN)
return "UNKNOWN";
else if (charset == ZCHARSET_ISO_8859_1)
return "ISO-8859-1";
else if (charset == ZCHARSET_UTF_8)
return "UTF-8";
return "UNKNOWN";
}
Code_t
ZTransliterate(char *in, int inlen, char *inset, char *outset, char **out, int *outlen)
{
iconv_t ih;
char *outset_t, *inp, *outp;
int retval;
size_t size, inleft, outleft;
*out = NULL;
*outlen = 0;
outset_t = malloc(strlen(outset) + 11);
if (outset_t == NULL)
return errno;
sprintf(outset_t, "%s//TRANSLIT", outset);
ih = iconv_open(outset_t, inset);
free(outset_t);
if (ih == (iconv_t)-1)
return errno;
size = inlen; /* doubling this should be enough, but.. */
do {
size = size * 2;
*out = malloc(size);
if (*out == NULL) {
iconv_close(ih);
return errno;
}
inleft = inlen;
outleft = size;
inp = in;
outp = *out;
retval = iconv(ih, &inp, &inleft, &outp, &outleft);
if (retval < 0)
free(*out);
} while (retval < 0 && errno == E2BIG);
iconv_close(ih);
if (retval < 0)
return errno;
*outlen = size - outleft;
return ZERR_NONE;
}
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