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/* FriBidi - Library of BiDi algorithm
* Copyright (C) 1999,2000 Dov Grobgeld, and
* Copyright (C) 2001,2002 Behdad Esfahbod.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library, in a file named COPYING; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA
*
* For licensing issues, contact <dov@imagic.weizmann.ac.il> and
* <fwpg@sharif.edu>.
*/
#include "fribidi_config.h"
#ifndef FRIBIDI_NO_CHARSETS
#include "fribidi_char_sets.h"
typedef struct
{
/* Convert the character string "s" to unicode string "us" and
return it's length. */
int (*charset_to_unicode) (char *s,
int length,
/* output */
FriBidiChar *us);
/* Convert the unicode string "us" with length "length" to character
string "s" and return it's length. */
int (*unicode_to_charset) (FriBidiChar *us,
int length,
/* output */
char *s);
/* Charset's name. */
char *name;
/* Charset's title. */
char *title;
/* Comments, if any. */
char *(*desc) (void);
/* Some charsets like CapRTL may need to change some fribidis tables, by
calling this function, they can do this changes. */
fribidi_boolean (*enter) (void);
/* Some charsets like CapRTL may need to change some fribidis tables, by
calling this function, they can undo their changes, perhaps to enter
another mode. */
fribidi_boolean (*leave) (void);
}
FriBidiCharSetHandler;
/* Each charset must define the functions and strings named below
(in _FRIBIDI_ADD_CHAR_SET) or define them as NULL, if not any. */
#define _FRIBIDI_ADD_CHAR_SET(CHAR_SET, char_set) \
{ \
fribidi_##char_set##_to_unicode, \
fribidi_unicode_to_##char_set, \
fribidi_char_set_name_##char_set, \
fribidi_char_set_title_##char_set, \
fribidi_char_set_desc_##char_set, \
fribidi_char_set_enter_##char_set, \
fribidi_char_set_leave_##char_set, \
},
FriBidiCharSetHandler fribidi_char_sets[FRIBIDI_CHAR_SETS_NUM + 1] = {
{NULL, NULL, "Not Implemented", NULL, NULL, NULL},
#include "fribidi_char_sets.i"
};
#undef _FRIBIDI_ADD_CHAR_SET
static char
toupper (char c)
{
return c < 'a' || c > 'z' ? c : c + 'A' - 'a';
}
int
fribidi_strcasecmp (const char *s1,
const char *s2)
{
while (*s1 && toupper (*s1) == toupper (*s2))
{
s1++;
s2++;
}
return *s1 - *s2;
}
/* Return the charset which name is "s". */
FRIBIDI_API FriBidiCharSet
fribidi_parse_charset (char *s)
{
int i;
for (i = FRIBIDI_CHAR_SETS_NUM; i; i--)
if (fribidi_strcasecmp (s, fribidi_char_sets[i].name) == 0)
return i;
return FRIBIDI_CHAR_SET_NOT_FOUND;
}
/* Convert the character string "s" in charset "char_set" to unicode
string "us" and return it's length. */
FRIBIDI_API int
fribidi_charset_to_unicode (FriBidiCharSet char_set,
char *s,
int length,
/* output */
FriBidiChar *us)
{
fribidi_char_set_enter (char_set);
return fribidi_char_sets[char_set].charset_to_unicode == NULL ? 0 :
(*fribidi_char_sets[char_set].charset_to_unicode) (s, length, us);
}
/* Convert the unicode string "us" with length "length" to character
string "s" in charset "char_set" and return it's length. */
FRIBIDI_API int
fribidi_unicode_to_charset (FriBidiCharSet char_set,
FriBidiChar *us,
int length,
/* output */
char *s)
{
fribidi_char_set_enter (char_set);
return fribidi_char_sets[char_set].unicode_to_charset == NULL ? 0 :
(*fribidi_char_sets[char_set].unicode_to_charset) (us, length, s);
}
/* Return the string containing the name of the charset. */
FRIBIDI_API char *
fribidi_char_set_name (FriBidiCharSet char_set)
{
return fribidi_char_sets[char_set].name == NULL ? (char *) "" :
fribidi_char_sets[char_set].name;
}
/* Return the string containing the title of the charset. */
FRIBIDI_API char *
fribidi_char_set_title (FriBidiCharSet char_set)
{
return fribidi_char_sets[char_set].title == NULL ?
fribidi_char_set_name (char_set) : fribidi_char_sets[char_set].title;
}
/* Return the string containing the comments about the charset, if any. */
FRIBIDI_API char *
fribidi_char_set_desc (FriBidiCharSet char_set)
{
return fribidi_char_sets[char_set].desc == NULL ?
NULL : fribidi_char_sets[char_set].desc ();
}
static FriBidiCharSet current_char_set = FRIBIDI_CHAR_SET_DEFAULT;
/* Some charsets like CapRTL may need to change some fribidis tables, by
calling this function, they can do this changes. */
FRIBIDI_API fribidi_boolean
fribidi_char_set_enter (FriBidiCharSet char_set)
{
if (char_set != current_char_set && fribidi_char_sets[char_set].enter)
{
fribidi_char_set_leave (current_char_set);
current_char_set = char_set;
return (*fribidi_char_sets[char_set].enter) ();
}
else
return FRIBIDI_TRUE;
}
/* Some charsets like CapRTL may need to change some fribidis tables, by
calling this function, they can undo their changes, maybe to enter
another mode. */
FRIBIDI_API fribidi_boolean
fribidi_char_set_leave (FriBidiCharSet char_set)
{
if (char_set == current_char_set && fribidi_char_sets[char_set].leave)
return (*fribidi_char_sets[char_set].leave) ();
else
return FRIBIDI_TRUE;
}
/* Interface version 1, deprecated, just for compatibility. */
#include <string.h>
FRIBIDI_API int
fribidi_charset_to_unicode_1 (FriBidiCharSet char_set,
char *s,
/* output */
FriBidiChar *us)
{
return fribidi_charset_to_unicode (char_set, s, strlen (s), us);
}
/* Also old character sets. */
#define FRIBIDI_TO_UNICODE_DEFINE_1(cs) \
int fribidi_##cs##_to_unicode_1 (char *s, FriBidiChar *us) \
{ \
return fribidi_##cs##_to_unicode (s, strlen(s), us); \
}
FRIBIDI_TO_UNICODE_DEFINE_1 (utf8)
FRIBIDI_TO_UNICODE_DEFINE_1 (cap_rtl)
FRIBIDI_TO_UNICODE_DEFINE_1 (iso8859_6)
FRIBIDI_TO_UNICODE_DEFINE_1 (iso8859_8)
FRIBIDI_TO_UNICODE_DEFINE_1 (cp1255)
FRIBIDI_TO_UNICODE_DEFINE_1 (cp1256) FRIBIDI_TO_UNICODE_DEFINE_1 (isiri_3342)
#undef FRIBIDI_TO_UNICODE_DEFINE_1
#endif
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