129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
![]() |
/* unicode-utils.c
|
||
|
* Unicode utility routines
|
||
|
*
|
||
|
* $Id$
|
||
|
*
|
||
|
* Wireshark - Network traffic analyzer
|
||
|
* By Gerald Combs <gerald@wireshark.org>
|
||
|
* Copyright 2006 Gerald Combs
|
||
|
*
|
||
|
* This program 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.
|
||
|
*
|
||
|
* This program 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.
|
||
|
*/
|
||
|
|
||
|
#ifdef _WIN32
|
||
|
|
||
|
#include <glib.h>
|
||
|
#include "unicode-utils.h"
|
||
|
|
||
|
#include <windows.h>
|
||
|
#include <tchar.h>
|
||
|
#include <wchar.h>
|
||
|
|
||
|
/** @file
|
||
|
* Unicode utilities (internal interface)
|
||
|
*
|
||
|
* We define UNICODE and _UNICODE under Windows. This means that
|
||
|
* Windows SDK routines expect UTF-16 strings, in contrast to newer
|
||
|
* versions of Glib and GTK+ which expect UTF-8. This module provides
|
||
|
* convenience routines for converting between UTF-8 and UTF-16.
|
||
|
*/
|
||
|
|
||
|
#define INITIAL_UTFBUF_SIZE 128
|
||
|
|
||
|
/*
|
||
|
* XXX - Should we use g_utf8_to_utf16() and g_utf16_to_utf8()
|
||
|
* instead? The goal of the functions below was to provide simple
|
||
|
* wrappers for UTF-8 <-> UTF-16 conversion without making the
|
||
|
* caller worry about freeing up memory afterward.
|
||
|
*/
|
||
|
|
||
|
/* Convert from UTF-8 to UTF-16. */
|
||
|
wchar_t * utf_8to16(const char *utf8str) {
|
||
|
static wchar_t *utf16buf[3];
|
||
|
static int utf16buf_len[3];
|
||
|
static int idx;
|
||
|
|
||
|
if (utf8str == NULL)
|
||
|
return NULL;
|
||
|
|
||
|
idx = (idx + 1) % 3;
|
||
|
|
||
|
/*
|
||
|
* Allocate the buffer if it's not already allocated.
|
||
|
*/
|
||
|
if (utf16buf[idx] == NULL) {
|
||
|
utf16buf_len[idx] = INITIAL_UTFBUF_SIZE;
|
||
|
utf16buf[idx] = g_malloc(utf16buf_len[idx] * sizeof(wchar_t));
|
||
|
}
|
||
|
|
||
|
while (MultiByteToWideChar(CP_UTF8, 0, utf8str,
|
||
|
-1, NULL, 0) >= utf16buf_len[idx]) {
|
||
|
/*
|
||
|
* Double the buffer's size if it's not big enough.
|
||
|
* The size of the buffer starts at 128, so doubling its size
|
||
|
* adds at least another 128 bytes, which is more than enough
|
||
|
* for one more character plus a terminating '\0'.
|
||
|
*/
|
||
|
utf16buf_len[idx] *= 2;
|
||
|
utf16buf[idx] = g_realloc(utf16buf[idx], utf16buf_len[idx] * sizeof(wchar_t));
|
||
|
}
|
||
|
|
||
|
if (MultiByteToWideChar(CP_UTF8, 0, utf8str,
|
||
|
-1, utf16buf[idx], utf16buf_len[idx]) == 0)
|
||
|
return NULL;
|
||
|
|
||
|
return utf16buf[idx];
|
||
|
}
|
||
|
|
||
|
/* Convert from UTF-16 to UTF-8. */
|
||
|
gchar * utf_16to8(const wchar_t *utf16str) {
|
||
|
static gchar *utf8buf[3];
|
||
|
static int utf8buf_len[3];
|
||
|
static int idx;
|
||
|
|
||
|
if (utf16str == NULL)
|
||
|
return NULL;
|
||
|
|
||
|
idx = (idx + 1) % 3;
|
||
|
|
||
|
/*
|
||
|
* Allocate the buffer if it's not already allocated.
|
||
|
*/
|
||
|
if (utf8buf[idx] == NULL) {
|
||
|
utf8buf_len[idx] = INITIAL_UTFBUF_SIZE;
|
||
|
utf8buf[idx] = g_malloc(utf8buf_len[idx]);
|
||
|
}
|
||
|
|
||
|
while (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
|
||
|
NULL, 0, NULL, NULL) >= utf8buf_len[idx]) {
|
||
|
/*
|
||
|
* Double the buffer's size if it's not big enough.
|
||
|
* The size of the buffer starts at 128, so doubling its size
|
||
|
* adds at least another 128 bytes, which is more than enough
|
||
|
* for one more character plus a terminating '\0'.
|
||
|
*/
|
||
|
utf8buf_len[idx] *= 2;
|
||
|
utf8buf[idx] = g_realloc(utf8buf[idx], utf8buf_len[idx]);
|
||
|
}
|
||
|
|
||
|
if (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
|
||
|
utf8buf[idx], utf8buf_len[idx], NULL, NULL) == 0)
|
||
|
return NULL;
|
||
|
|
||
|
return utf8buf[idx];
|
||
|
}
|
||
|
|
||
|
#endif
|