CMake/Utilities/cmcurl/lib/curlx/multibyte.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) Daniel Stenberg, <[email protected]>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/

/*
 * This file is 'mem-include-scan' clean, which means its memory allocations
 * are not tracked by the curl memory tracker memdebug, so they must not use
 * `CURLDEBUG` macro replacements in memdebug.h for free, malloc, etc. To avoid
 * these macro replacements, wrap the names in parentheses to call the original
 * versions: `ptr = (malloc)(123)`, `(free)(ptr)`, etc.
 */

#include "../curl_setup.h"

#ifdef _WIN32

#include "multibyte.h"

/*
 * MultiByte conversions using Windows kernel32 library.
 */

wchar_t *curlx_convert_UTF8_to_wchar(const char *str_utf8)
{
  wchar_t *str_w = NULL;

  if(str_utf8) {
    int str_w_len = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
                                        str_utf8, -1, NULL, 0);
    if(str_w_len > 0) {
      str_w = (malloc)(str_w_len * sizeof(wchar_t));
      if(str_w) {
        if(MultiByteToWideChar(CP_UTF8, 0, str_utf8, -1, str_w,
                               str_w_len) == 0) {
          (free)(str_w);
          return NULL;
        }
      }
    }
  }

  return str_w;
}

char *curlx_convert_wchar_to_UTF8(const wchar_t *str_w)
{
  char *str_utf8 = NULL;

  if(str_w) {
    int bytes = WideCharToMultiByte(CP_UTF8, 0, str_w, -1,
                                    NULL, 0, NULL, NULL);
    if(bytes > 0) {
      str_utf8 = (malloc)(bytes);
      if(str_utf8) {
        if(WideCharToMultiByte(CP_UTF8, 0, str_w, -1, str_utf8, bytes,
                               NULL, NULL) == 0) {
          (free)(str_utf8);
          return NULL;
        }
      }
    }
  }

  return str_utf8;
}

#endif /* _WIN32 */