2 * Unicode utility routines
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 2006 Gerald Combs
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "unicode-utils.h"
26 ws_utf8_char_len(guint8 ch)
28 if (ch >= 0xfe) return -1;
29 if (ch >= 0xfc) return 6;
30 if (ch >= 0xf8) return 5;
31 if (ch >= 0xf0) return 4;
32 if (ch >= 0xe0) return 3;
33 if (ch >= 0xc0) return 2;
44 * Unicode utilities (internal interface)
46 * We define UNICODE and _UNICODE under Windows. This means that
47 * Windows SDK routines expect UTF-16 strings, in contrast to newer
48 * versions of Glib and GTK+ which expect UTF-8. This module provides
49 * convenience routines for converting between UTF-8 and UTF-16.
52 #define INITIAL_UTFBUF_SIZE 128
55 * XXX - Should we use g_utf8_to_utf16() and g_utf16_to_utf8()
56 * instead? The goal of the functions below was to provide simple
57 * wrappers for UTF-8 <-> UTF-16 conversion without making the
58 * caller worry about freeing up memory afterward.
61 /* Convert from UTF-8 to UTF-16. */
63 utf_8to16(const char *utf8str)
65 static wchar_t *utf16buf[3];
66 static int utf16buf_len[3];
75 * Allocate the buffer if it's not already allocated.
77 if (utf16buf[idx] == NULL) {
78 utf16buf_len[idx] = INITIAL_UTFBUF_SIZE;
79 utf16buf[idx] = g_malloc(utf16buf_len[idx] * sizeof(wchar_t));
82 while (MultiByteToWideChar(CP_UTF8, 0, utf8str,
83 -1, NULL, 0) >= utf16buf_len[idx]) {
85 * Double the buffer's size if it's not big enough.
86 * The size of the buffer starts at 128, so doubling its size
87 * adds at least another 128 bytes, which is more than enough
88 * for one more character plus a terminating '\0'.
90 utf16buf_len[idx] *= 2;
91 utf16buf[idx] = g_realloc(utf16buf[idx], utf16buf_len[idx] * sizeof(wchar_t));
94 if (MultiByteToWideChar(CP_UTF8, 0, utf8str,
95 -1, utf16buf[idx], utf16buf_len[idx]) == 0)
102 utf_8to16_snprintf(TCHAR *utf16buf, gint utf16buf_len, const gchar* fmt, ...)
108 dst = g_strdup_vprintf(fmt, ap);
111 StringCchPrintf(utf16buf, utf16buf_len, _T("%s"), utf_8to16(dst));
116 /* Convert from UTF-16 to UTF-8. */
118 utf_16to8(const wchar_t *utf16str)
120 static gchar *utf8buf[3];
121 static int utf8buf_len[3];
124 if (utf16str == NULL)
130 * Allocate the buffer if it's not already allocated.
132 if (utf8buf[idx] == NULL) {
133 utf8buf_len[idx] = INITIAL_UTFBUF_SIZE;
134 utf8buf[idx] = g_malloc(utf8buf_len[idx]);
137 while (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
138 NULL, 0, NULL, NULL) >= utf8buf_len[idx]) {
140 * Double the buffer's size if it's not big enough.
141 * The size of the buffer starts at 128, so doubling its size
142 * adds at least another 128 bytes, which is more than enough
143 * for one more character plus a terminating '\0'.
145 utf8buf_len[idx] *= 2;
146 utf8buf[idx] = g_realloc(utf8buf[idx], utf8buf_len[idx]);
149 if (WideCharToMultiByte(CP_UTF8, 0, utf16str, -1,
150 utf8buf[idx], utf8buf_len[idx], NULL, NULL) == 0)
156 /* Convert our argument list from UTF-16 to UTF-8. */
158 arg_list_utf_16to8(int argc, char *argv[]) {
162 /* Convert our arg list to UTF-8. */
163 wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
164 if (wc_argv && wc_argc == argc) {
165 for (i = 0; i < argc; i++) {
166 argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
168 } /* XXX else bail because something is horribly, horribly wrong? */
175 * Editor modelines - http://www.wireshark.org/tools/modelines.html
180 * indent-tabs-mode: nil
183 * ex: set shiftwidth=2 tabstop=8 expandtab:
184 * :indentSize=2:tabSize=8:noTabs=true: