forked from osmocom/wireshark
418699b85d
svn path=/trunk/; revision=29635
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/* unicode-utils.c
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* Unicode utility routines
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2006 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _WIN32
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#error "This is only for Windows"
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#endif
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#include "unicode-utils.h"
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/** @file
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* Unicode utilities (internal interface)
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*
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* We define UNICODE and _UNICODE under Windows. This means that
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* Windows SDK routines expect UTF-16 strings, in contrast to newer
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* versions of Glib and GTK+ which expect UTF-8. This module provides
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* convenience routines for converting between UTF-8 and UTF-16.
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*/
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#define INITIAL_UTFBUF_SIZE 128
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/*
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* XXX - Should we use g_utf8_to_utf16() and g_utf16_to_utf8()
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* instead? The goal of the functions below was to provide simple
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* wrappers for UTF-8 <-> UTF-16 conversion without making the
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* caller worry about freeing up memory afterward.
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*/
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/* Convert from UTF-8 to UTF-16. */
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wchar_t * utf_8to16(const char *utf8str) {
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static wchar_t *utf16buf[3];
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static int utf16buf_len[3];
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static int idx;
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if (utf8str == NULL)
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return NULL;
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idx = (idx + 1) % 3;
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/*
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* Allocate the buffer if it's not already allocated.
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*/
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if (utf16buf[idx] == NULL) {
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utf16buf_len[idx] = INITIAL_UTFBUF_SIZE;
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utf16buf[idx] = g_malloc(utf16buf_len[idx] * sizeof(wchar_t));
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}
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while (MultiByteToWideChar(CP_UTF8, 0, utf8str,
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-1, NULL, 0) >= utf16buf_len[idx]) {
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/*
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* Double the buffer's size if it's not big enough.
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* The size of the buffer starts at 128, so doubling its size
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* adds at least another 128 bytes, which is more than enough
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* for one more character plus a terminating '\0'.
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*/
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utf16buf_len[idx] *= 2;
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utf16buf[idx] = g_realloc(utf16buf[idx], utf16buf_len[idx] * sizeof(wchar_t));
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}
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if (MultiByteToWideChar(CP_UTF8, 0, utf8str,
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-1, utf16buf[idx], utf16buf_len[idx]) == 0)
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return NULL;
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return utf16buf[idx];
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}
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void utf_8to16_snprintf(TCHAR *utf16buf, gint utf16buf_len, const gchar* fmt, ...) {
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va_list ap;
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gchar* dst;
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va_start(ap,fmt);
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dst = g_strdup_vprintf(fmt, ap);
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va_end(ap);
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_snwprintf(utf16buf, utf16buf_len, _T("%s"), utf_8to16(dst));
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g_free(dst);
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}
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/* Convert from UTF-16 to UTF-8. */
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gchar * utf_16to8(const wchar_t *utf16str) {
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static gchar *utf8buf[3];
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static int utf8buf_len[3];
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static int idx;
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if (utf16str == NULL)
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return NULL;
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idx = (idx + 1) % 3;
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/*
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* Allocate the buffer if it's not already allocated.
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*/
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if (utf8buf[idx] == NULL) {
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utf8buf_len[idx] = INITIAL_UTFBUF_SIZE;
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utf8buf[idx] = g_malloc(utf8buf_len[idx]);
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}
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while (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
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NULL, 0, NULL, NULL) >= utf8buf_len[idx]) {
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/*
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* Double the buffer's size if it's not big enough.
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* The size of the buffer starts at 128, so doubling its size
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* adds at least another 128 bytes, which is more than enough
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* for one more character plus a terminating '\0'.
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*/
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utf8buf_len[idx] *= 2;
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utf8buf[idx] = g_realloc(utf8buf[idx], utf8buf_len[idx]);
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}
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if (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
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utf8buf[idx], utf8buf_len[idx], NULL, NULL) == 0)
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return NULL;
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return utf8buf[idx];
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}
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