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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#ifdef _WIN32
#include <sys/types.h>
#include <string>
#else
// Bring in prototypes for standard APIs so that we can import them into the utf8 namespace.
#include <fcntl.h> // open
#include <stdio.h> // fopen
#include <sys/stat.h> // mkdir
#include <unistd.h> // unlink
#endif
namespace android {
namespace base {
// Only available on Windows because this is only needed on Windows.
#ifdef _WIN32
// Convert size number of UTF-16 wchar_t's to UTF-8. Returns whether the
// conversion was done successfully.
bool WideToUTF8(const wchar_t* utf16, const size_t size, std::string* utf8);
// Convert a NULL-terminated string of UTF-16 characters to UTF-8. Returns
// whether the conversion was done successfully.
bool WideToUTF8(const wchar_t* utf16, std::string* utf8);
// Convert a UTF-16 std::wstring (including any embedded NULL characters) to
// UTF-8. Returns whether the conversion was done successfully.
bool WideToUTF8(const std::wstring& utf16, std::string* utf8);
// Convert size number of UTF-8 char's to UTF-16. Returns whether the conversion
// was done successfully.
bool UTF8ToWide(const char* utf8, const size_t size, std::wstring* utf16);
// Convert a NULL-terminated string of UTF-8 characters to UTF-16. Returns
// whether the conversion was done successfully.
bool UTF8ToWide(const char* utf8, std::wstring* utf16);
// Convert a UTF-8 std::string (including any embedded NULL characters) to
// UTF-16. Returns whether the conversion was done successfully.
bool UTF8ToWide(const std::string& utf8, std::wstring* utf16);
// Convert a file system path, represented as a NULL-terminated string of
// UTF-8 characters, to a UTF-16 string representing the same file system
// path using the Windows extended-lengh path representation.
//
// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#MAXPATH:
// ```The Windows API has many functions that also have Unicode versions to
// permit an extended-length path for a maximum total path length of 32,767
// characters. To specify an extended-length path, use the "\\?\" prefix.
// For example, "\\?\D:\very long path".```
//
// Returns whether the conversion was done successfully.
bool UTF8PathToWindowsLongPath(const char* utf8, std::wstring* utf16);
#endif
// The functions in the utf8 namespace take UTF-8 strings. For Windows, these
// are wrappers, for non-Windows these just expose existing APIs. To call these
// functions, use:
//
// // anonymous namespace to avoid conflict with existing open(), unlink(), etc.
// namespace {
// // Import functions into anonymous namespace.
// using namespace android::base::utf8;
//
// void SomeFunction(const char* name) {
// int fd = open(name, ...); // Calls android::base::utf8::open().
// ...
// unlink(name); // Calls android::base::utf8::unlink().
// }
// }
namespace utf8 {
#ifdef _WIN32
FILE* fopen(const char* name, const char* mode);
int mkdir(const char* name, mode_t mode);
int open(const char* name, int flags, ...);
int unlink(const char* name);
#else
using ::fopen;
using ::mkdir;
using ::open;
using ::unlink;
#endif
} // namespace utf8
} // namespace base
} // namespace android
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