| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "string_utils.h" |
| |
| #include <shobjidl.h> |
| #include <windows.h> |
| |
| #include <string> |
| |
| namespace file_selector_windows { |
| |
| // Converts the given UTF-16 string to UTF-8. |
| std::string Utf8FromUtf16(std::wstring_view utf16_string) { |
| if (utf16_string.empty()) { |
| return std::string(); |
| } |
| int target_length = ::WideCharToMultiByte( |
| CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string.data(), |
| static_cast<int>(utf16_string.length()), nullptr, 0, nullptr, nullptr); |
| if (target_length == 0) { |
| return std::string(); |
| } |
| std::string utf8_string; |
| utf8_string.resize(target_length); |
| int converted_length = ::WideCharToMultiByte( |
| CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string.data(), |
| static_cast<int>(utf16_string.length()), utf8_string.data(), |
| target_length, nullptr, nullptr); |
| if (converted_length == 0) { |
| return std::string(); |
| } |
| return utf8_string; |
| } |
| |
| // Converts the given UTF-8 string to UTF-16. |
| std::wstring Utf16FromUtf8(std::string_view utf8_string) { |
| if (utf8_string.empty()) { |
| return std::wstring(); |
| } |
| int target_length = |
| ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8_string.data(), |
| static_cast<int>(utf8_string.length()), nullptr, 0); |
| if (target_length == 0) { |
| return std::wstring(); |
| } |
| std::wstring utf16_string; |
| utf16_string.resize(target_length); |
| int converted_length = |
| ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8_string.data(), |
| static_cast<int>(utf8_string.length()), |
| utf16_string.data(), target_length); |
| if (converted_length == 0) { |
| return std::wstring(); |
| } |
| return utf16_string; |
| } |
| |
| } // namespace file_selector_windows |