1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_BASE_UTF8_H 18 #define ANDROID_BASE_UTF8_H 19 20 #ifdef _WIN32 21 #include <string> 22 #else 23 // Bring in prototypes for standard APIs so that we can import them into the utf8 namespace. 24 #include <fcntl.h> // open 25 #include <stdio.h> // fopen 26 #include <sys/stat.h> // mkdir 27 #include <unistd.h> // unlink 28 #endif 29 30 namespace android { 31 namespace base { 32 33 // Only available on Windows because this is only needed on Windows. 34 #ifdef _WIN32 35 // Convert size number of UTF-16 wchar_t's to UTF-8. Returns whether the 36 // conversion was done successfully. 37 bool WideToUTF8(const wchar_t* utf16, const size_t size, std::string* utf8); 38 39 // Convert a NULL-terminated string of UTF-16 characters to UTF-8. Returns 40 // whether the conversion was done successfully. 41 bool WideToUTF8(const wchar_t* utf16, std::string* utf8); 42 43 // Convert a UTF-16 std::wstring (including any embedded NULL characters) to 44 // UTF-8. Returns whether the conversion was done successfully. 45 bool WideToUTF8(const std::wstring& utf16, std::string* utf8); 46 47 // Convert size number of UTF-8 char's to UTF-16. Returns whether the conversion 48 // was done successfully. 49 bool UTF8ToWide(const char* utf8, const size_t size, std::wstring* utf16); 50 51 // Convert a NULL-terminated string of UTF-8 characters to UTF-16. Returns 52 // whether the conversion was done successfully. 53 bool UTF8ToWide(const char* utf8, std::wstring* utf16); 54 55 // Convert a UTF-8 std::string (including any embedded NULL characters) to 56 // UTF-16. Returns whether the conversion was done successfully. 57 bool UTF8ToWide(const std::string& utf8, std::wstring* utf16); 58 59 // Convert a file system path, represented as a NULL-terminated string of 60 // UTF-8 characters, to a UTF-16 string representing the same file system 61 // path using the Windows extended-lengh path representation. 62 // 63 // See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#MAXPATH: 64 // ```The Windows API has many functions that also have Unicode versions to 65 // permit an extended-length path for a maximum total path length of 32,767 66 // characters. To specify an extended-length path, use the "\\?\" prefix. 67 // For example, "\\?\D:\very long path".``` 68 // 69 // Returns whether the conversion was done successfully. 70 bool UTF8PathToWindowsLongPath(const char* utf8, std::wstring* utf16); 71 #endif 72 73 // The functions in the utf8 namespace take UTF-8 strings. For Windows, these 74 // are wrappers, for non-Windows these just expose existing APIs. To call these 75 // functions, use: 76 // 77 // // anonymous namespace to avoid conflict with existing open(), unlink(), etc. 78 // namespace { 79 // // Import functions into anonymous namespace. 80 // using namespace android::base::utf8; 81 // 82 // void SomeFunction(const char* name) { 83 // int fd = open(name, ...); // Calls android::base::utf8::open(). 84 // ... 85 // unlink(name); // Calls android::base::utf8::unlink(). 86 // } 87 // } 88 namespace utf8 { 89 90 #ifdef _WIN32 91 FILE* fopen(const char* name, const char* mode); 92 int mkdir(const char* name, mode_t mode); 93 int open(const char* name, int flags, ...); 94 int unlink(const char* name); 95 #else 96 using ::fopen; 97 using ::mkdir; 98 using ::open; 99 using ::unlink; 100 #endif 101 102 } // namespace utf8 103 } // namespace base 104 } // namespace android 105 106 #endif // ANDROID_BASE_UTF8_H 107
