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/* unicode-utils.c
* Unicode utility routines
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "unicode-utils.h"
int
ws_utf8_char_len(guint8 ch)
{
if (ch >= 0xfe) return -1;
if (ch >= 0xfc) return 6;
if (ch >= 0xf8) return 5;
if (ch >= 0xf0) return 4;
if (ch >= 0xe0) return 3;
if (ch >= 0xc0) return 2;
else return 1;
}
#ifdef _WIN32
#include <shellapi.h>
#include <strsafe.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];
}
void
utf_8to16_snprintf(TCHAR *utf16buf, gint utf16buf_len, const gchar* fmt, ...)
{
va_list ap;
gchar* dst;
va_start(ap,fmt);
dst = g_strdup_vprintf(fmt, ap);
va_end(ap);
StringCchPrintf(utf16buf, utf16buf_len, _T("%s"), utf_8to16(dst));
g_free(dst);
}
/* 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];
}
/* Convert our argument list from UTF-16 to UTF-8. */
void
arg_list_utf_16to8(int argc, char *argv[]) {
LPWSTR *wc_argv;
int wc_argc, i;
/* Convert our arg list to UTF-8. */
wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
if (wc_argv && wc_argc == argc) {
for (i = 0; i < argc; i++) {
argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
}
} /* XXX else bail because something is horribly, horribly wrong? */
LocalFree(wc_argv);
}
#endif
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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