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