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deeba405a9
gnupg/jnlib/utf8conv.c
Werner Koch deeba405a9 gcc-4 defaults forced me to edit many many files to get rid of the 
char * vs. unsigned char * warnings.  The GNU coding standards used to
say that these mismatches are okay and better than a bunch of casts.
Obviously this has changed now.
2005-06-16 08:12:03 +00:00

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/* utf8conf.c - UTF8 character set conversion
* Copyright (C) 1994, 1998, 1999, 2000, 2001,
* 2003 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#ifdef HAVE_LANGINFO_CODESET
#include <langinfo.h>
#endif
#include "libjnlib-config.h"
#include "stringhelp.h"
#include "utf8conv.h"
static ushort koi8_unicode[128] = {
0x2500, 0x2502, 0x250c, 0x2510, 0x2514, 0x2518, 0x251c, 0x2524,
0x252c, 0x2534, 0x253c, 0x2580, 0x2584, 0x2588, 0x258c, 0x2590,
0x2591, 0x2592, 0x2593, 0x2320, 0x25a0, 0x2219, 0x221a, 0x2248,
0x2264, 0x2265, 0x00a0, 0x2321, 0x00b0, 0x00b2, 0x00b7, 0x00f7,
0x2550, 0x2551, 0x2552, 0x0451, 0x2553, 0x2554, 0x2555, 0x2556,
0x2557, 0x2558, 0x2559, 0x255a, 0x255b, 0x255c, 0x255d, 0x255e,
0x255f, 0x2560, 0x2561, 0x0401, 0x2562, 0x2563, 0x2564, 0x2565,
0x2566, 0x2567, 0x2568, 0x2569, 0x256a, 0x256b, 0x256c, 0x00a9,
0x044e, 0x0430, 0x0431, 0x0446, 0x0434, 0x0435, 0x0444, 0x0433,
0x0445, 0x0438, 0x0439, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e,
0x043f, 0x044f, 0x0440, 0x0441, 0x0442, 0x0443, 0x0436, 0x0432,
0x044c, 0x044b, 0x0437, 0x0448, 0x044d, 0x0449, 0x0447, 0x044a,
0x042e, 0x0410, 0x0411, 0x0426, 0x0414, 0x0415, 0x0424, 0x0413,
0x0425, 0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e,
0x041f, 0x042f, 0x0420, 0x0421, 0x0422, 0x0423, 0x0416, 0x0412,
0x042c, 0x042b, 0x0417, 0x0428, 0x042d, 0x0429, 0x0427, 0x042a
};
static ushort latin2_unicode[128] = {
0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
0x0088, 0x0089, 0x008A, 0x008B, 0x008C, 0x008D, 0x008E, 0x008F,
0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
0x0098, 0x0099, 0x009A, 0x009B, 0x009C, 0x009D, 0x009E, 0x009F,
0x00A0, 0x0104, 0x02D8, 0x0141, 0x00A4, 0x013D, 0x015A, 0x00A7,
0x00A8, 0x0160, 0x015E, 0x0164, 0x0179, 0x00AD, 0x017D, 0x017B,
0x00B0, 0x0105, 0x02DB, 0x0142, 0x00B4, 0x013E, 0x015B, 0x02C7,
0x00B8, 0x0161, 0x015F, 0x0165, 0x017A, 0x02DD, 0x017E, 0x017C,
0x0154, 0x00C1, 0x00C2, 0x0102, 0x00C4, 0x0139, 0x0106, 0x00C7,
0x010C, 0x00C9, 0x0118, 0x00CB, 0x011A, 0x00CD, 0x00CE, 0x010E,
0x0110, 0x0143, 0x0147, 0x00D3, 0x00D4, 0x0150, 0x00D6, 0x00D7,
0x0158, 0x016E, 0x00DA, 0x0170, 0x00DC, 0x00DD, 0x0162, 0x00DF,
0x0155, 0x00E1, 0x00E2, 0x0103, 0x00E4, 0x013A, 0x0107, 0x00E7,
0x010D, 0x00E9, 0x0119, 0x00EB, 0x011B, 0x00ED, 0x00EE, 0x010F,
0x0111, 0x0144, 0x0148, 0x00F3, 0x00F4, 0x0151, 0x00F6, 0x00F7,
0x0159, 0x016F, 0x00FA, 0x0171, 0x00FC, 0x00FD, 0x0163, 0x02D9
};
static const char *active_charset_name = "iso-8859-1";
static ushort *active_charset = NULL;
static int no_translation = 0;
int
set_native_charset (const char *newset)
{
if (!newset)
#ifdef HAVE_LANGINFO_CODESET
newset = nl_langinfo (CODESET);
#else
newset = "8859-1";
#endif
if (strlen (newset) > 3 && !ascii_memcasecmp (newset, "iso", 3))
{
newset += 3;
if (*newset == '-' || *newset == '_')
newset++;
}
if (!*newset
|| !ascii_strcasecmp (newset, "8859-1")
|| !ascii_strcasecmp (newset, "8859-15"))
{
active_charset_name = "iso-8859-1";
no_translation = 0;
active_charset = NULL;
}
else if (!ascii_strcasecmp (newset, "8859-2"))
{
active_charset_name = "iso-8859-2";
no_translation = 0;
active_charset = latin2_unicode;
}
else if (!ascii_strcasecmp (newset, "koi8-r"))
{
active_charset_name = "koi8-r";
no_translation = 0;
active_charset = koi8_unicode;
}
else if (!ascii_strcasecmp (newset, "utf8")
|| !ascii_strcasecmp (newset, "utf-8"))
{
active_charset_name = "utf-8";
no_translation = 1;
active_charset = NULL;
}
else
return -1;
return 0;
}
const char *
get_native_charset ()
{
return active_charset_name;
}
/****************
* Convert string, which is in native encoding to UTF8 and return the
* new allocated UTF8 string.
*/
char *
native_to_utf8 (const char *orig_string)
{
const unsigned char *string = (const unsigned char *)orig_string;
const unsigned char *s;
char *buffer;
unsigned char *p;
size_t length = 0;
if (no_translation)
{
buffer = jnlib_xstrdup (orig_string);
}
else if (active_charset)
{
for (s = string; *s; s++)
{
length++;
if (*s & 0x80)
length += 2; /* we may need 3 bytes */
}
buffer = jnlib_xmalloc (length + 1);
for (p = (unsigned char *)buffer, s = string; *s; s++)
{
if ((*s & 0x80))
{
ushort val = active_charset[*s & 0x7f];
if (val < 0x0800)
{
*p++ = 0xc0 | ((val >> 6) & 0x1f);
*p++ = 0x80 | (val & 0x3f);
}
else
{
*p++ = 0xe0 | ((val >> 12) & 0x0f);
*p++ = 0x80 | ((val >> 6) & 0x3f);
*p++ = 0x80 | (val & 0x3f);
}
}
else
*p++ = *s;
}
*p = 0;
}
else
{
for (s = string; *s; s++)
{
length++;
if (*s & 0x80)
length++;
}
buffer = jnlib_xmalloc (length + 1);
for (p = (unsigned char *)buffer, s = string; *s; s++)
{
if (*s & 0x80)
{
*p++ = 0xc0 | ((*s >> 6) & 3);
*p++ = 0x80 | (*s & 0x3f);
}
else
*p++ = *s;
}
*p = 0;
}
return buffer;
}
/* Convert string, which is in UTF8 to native encoding. Replace
* illegal encodings by some "\xnn" and quote all control
* characters. A character with value DELIM will always be quoted, it
* must be a vanilla ASCII character. */
char *
utf8_to_native (const char *string, size_t length, int delim)
{
int nleft;
int i;
unsigned char encbuf[8];
int encidx;
const byte *s;
size_t n;
char *buffer = NULL;
char *p = NULL;
unsigned long val = 0;
size_t slen;
int resync = 0;
/* 1. pass (p==NULL): count the extended utf-8 characters */
/* 2. pass (p!=NULL): create string */
for (;;)
{
for (slen = length, nleft = encidx = 0, n = 0,
s = (const unsigned char *)string; slen;
s++, slen--)
{
if (resync)
{
if (!(*s < 128 || (*s >= 0xc0 && *s <= 0xfd)))
{
/* still invalid */
if (p)
{
sprintf (p, "\\x%02x", *s);
p += 4;
}
n += 4;
continue;
}
resync = 0;
}
if (!nleft)
{
if (!(*s & 0x80))
{ /* plain ascii */
if (*s < 0x20 || *s == 0x7f || *s == delim ||
(delim && *s == '\\'))
{
n++;
if (p)
*p++ = '\\';
switch (*s)
{
case '\n':
n++;
if (p)
*p++ = 'n';
break;
case '\r':
n++;
if (p)
*p++ = 'r';
break;
case '\f':
n++;
if (p)
*p++ = 'f';
break;
case '\v':
n++;
if (p)
*p++ = 'v';
break;
case '\b':
n++;
if (p)
*p++ = 'b';
break;
case 0:
n++;
if (p)
*p++ = '0';
break;
default:
n += 3;
if (p)
{
sprintf (p, "x%02x", *s);
p += 3;
}
break;
}
}
else
{
if (p)
*p++ = *s;
n++;
}
}
else if ((*s & 0xe0) == 0xc0)
{ /* 110x xxxx */
val = *s & 0x1f;
nleft = 1;
encidx = 0;
encbuf[encidx++] = *s;
}
else if ((*s & 0xf0) == 0xe0)
{ /* 1110 xxxx */
val = *s & 0x0f;
nleft = 2;
encidx = 0;
encbuf[encidx++] = *s;
}
else if ((*s & 0xf8) == 0xf0)
{ /* 1111 0xxx */
val = *s & 0x07;
nleft = 3;
encidx = 0;
encbuf[encidx++] = *s;
}
else if ((*s & 0xfc) == 0xf8)
{ /* 1111 10xx */
val = *s & 0x03;
nleft = 4;
encidx = 0;
encbuf[encidx++] = *s;
}
else if ((*s & 0xfe) == 0xfc)
{ /* 1111 110x */
val = *s & 0x01;
nleft = 5;
encidx = 0;
encbuf[encidx++] = *s;
}
else
{ /* invalid encoding: print as \xnn */
if (p)
{
sprintf (p, "\\x%02x", *s);
p += 4;
}
n += 4;
resync = 1;
}
}
else if (*s < 0x80 || *s >= 0xc0)
{ /* invalid */
if (p)
{
for (i = 0; i < encidx; i++)
{
sprintf (p, "\\x%02x", encbuf[i]);
p += 4;
}
sprintf (p, "\\x%02x", *s);
p += 4;
}
n += 4 + 4 * encidx;
nleft = 0;
encidx = 0;
resync = 1;
}
else
{
encbuf[encidx++] = *s;
val <<= 6;
val |= *s & 0x3f;
if (!--nleft)
{ /* ready */
if (no_translation)
{
if (p)
{
for (i = 0; i < encidx; i++)
*p++ = encbuf[i];
}
n += encidx;
encidx = 0;
}
else if (active_charset)
{ /* table lookup */
for (i = 0; i < 128; i++)
{
if (active_charset[i] == val)
break;
}
if (i < 128)
{ /* we can print this one */
if (p)
*p++ = i + 128;
n++;
}
else
{ /* we do not have a translation: print utf8 */
if (p)
{
for (i = 0; i < encidx; i++)
{
sprintf (p, "\\x%02x", encbuf[i]);
p += 4;
}
}
n += encidx * 4;
encidx = 0;
}
}
else
{ /* native set */
if (val >= 0x80 && val < 256)
{
n++; /* we can simply print this character */
if (p)
*p++ = val;
}
else
{ /* we do not have a translation: print utf8 */
if (p)
{
for (i = 0; i < encidx; i++)
{
sprintf (p, "\\x%02x", encbuf[i]);
p += 4;
}
}
n += encidx * 4;
encidx = 0;
}
}
}
}
}
if (!buffer)
{ /* allocate the buffer after the first pass */
buffer = p = jnlib_xmalloc (n + 1);
}
else
{
*p = 0; /* make a string */
return buffer;
}
}
}
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