179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
/* unicode-utils.c
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* Unicode utility routines
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include "unicode-utils.h"
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int ws_utf8_seqlen[256] = {
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x00...0x0f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x10...0x1f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x20...0x2f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x30...0x3f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x40...0x4f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x50...0x5f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x60...0x6f */
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0x70...0x7f */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x80...0x8f */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x90...0x9f */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xa0...0xaf */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xb0...0xbf */
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0,0,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* 0xc0...0xcf */
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* 0xd0...0xdf */
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3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, /* 0xe0...0xef */
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4,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0, /* 0xf0...0xff */
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};
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#ifdef _WIN32
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#include <strsafe.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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const wchar_t *
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utf_8to16(const char *utf8str)
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{
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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
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utf_8to16_snprintf(TCHAR *utf16buf, gint utf16buf_len, const gchar* fmt, ...)
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{
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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 = ws_strdup_vprintf(fmt, ap);
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va_end(ap);
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StringCchPrintf(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 *
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utf_16to8(const wchar_t *utf16str)
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{
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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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/* Convert our argument list from UTF-16 to UTF-8. */
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char **
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arg_list_utf_16to8(int argc, wchar_t *wc_argv[]) {
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char **argv;
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int i;
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argv = (char **) g_malloc((argc + 1) * sizeof(char *));
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for (i = 0; i < argc; i++) {
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argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
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}
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argv[argc] = NULL;
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return argv;
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}
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#endif
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local Variables:
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* c-basic-offset: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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