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Diffstat (limited to 'third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc')
-rw-r--r-- | third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc new file mode 100644 index 0000000000..d30bcf0bfe --- /dev/null +++ b/third_party/protobuf/3.0.0/src/google/protobuf/io/io_win32.cc @@ -0,0 +1,159 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Author: laszlocsomor@google.com (Laszlo Csomor) +// +// Implementation for long-path-aware open/mkdir/access on Windows. +// +// These functions convert the input path to an absolute Windows path +// with UNC prefix if necessary, then pass that to +// _wopen/_wmkdir/_waccess (declared in <io.h>) respectively. This +// allows working with files/directories whose paths is longer than +// MAX_PATH (260 chars). +// +// This file is only used on Windows, it's empty on other platforms. + +#if defined(_WIN32) + +#include <Windows.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <io.h> + +#include <string> +#include <memory> + +#include <google/protobuf/io/io_win32.h> + +namespace google { +namespace protobuf { +namespace io { +namespace win32 { + +template <typename char_type> +static bool has_unc_prefix(const std::basic_string<char_type>& path) { + return path.size() > 4 && path[0] == '\\' && path[1] == '\\' && + path[2] == '?' && path[3] == '\\'; +} + +template <typename char_type> +static bool is_path_absolute(const std::basic_string<char_type>& path) { + return (path.size() > 2 && path[1] == ':') || has_unc_prefix(path); +} + +template <typename char_type> +static bool is_separator(char_type c) { + return c == '/' || c == '\\'; +} + +static void replace_directory_separators(WCHAR* p) { + for (; *p != L'\0'; ++p) { + if (*p == L'/') { + *p = L'\\'; + } + } +} + +static std::wstring get_cwd() { + DWORD result = ::GetCurrentDirectoryW(0, NULL); + std::unique_ptr<WCHAR[]> cwd(new WCHAR[result]); + ::GetCurrentDirectoryW(result, cwd.get()); + cwd.get()[result - 1] = 0; + replace_directory_separators(cwd.get()); + return std::move(std::wstring(cwd.get())); +} + +static std::wstring join_paths(const std::wstring& path1, + const std::wstring& path2) { + if (path1.empty() || is_path_absolute(path2)) { + return path2; + } + if (path2.empty()) { + return path1; + } + + if (is_separator(path1.back())) { + return is_separator(path2.front()) + ? (path1 + path2.substr(1)) + : (path1 + path2); + } else { + return is_separator(path2.front()) + ? (path1 + path2) + : (path1 + L'\\' + path2); + } +} + +static std::wstring as_wchar_path(const std::string& path) { + int len = ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(), + NULL, 0); + std::unique_ptr<WCHAR[]> wbuf(new WCHAR[len + 1]); + ::MultiByteToWideChar(CP_UTF8, 0, path.c_str(), path.size(), + wbuf.get(), len + 1); + wbuf.get()[len] = 0; + replace_directory_separators(wbuf.get()); + return std::move(std::wstring(wbuf.get())); +} + +static std::wstring as_windows_path(const std::string& path, + size_t max_path) { + std::wstring wpath(as_wchar_path(path)); + if (!is_path_absolute(path)) { + wpath = join_paths(get_cwd(), wpath); + } + if (wpath.size() >= max_path && !has_unc_prefix(wpath)) { + wpath = std::wstring(L"\\\\?\\") + wpath; + } + return wpath; +} + +int open(const char* path, int flags, int mode) { + return ::_wopen(as_windows_path(path, MAX_PATH).c_str(), flags, mode); +} + +int mkdir(const char* name, int _mode) { + // CreateDirectoryA's limit is 248 chars, see MSDN. + // https://msdn.microsoft.com/en-us/library/windows/desktop/aa363855(v=vs.85).aspx + // This limit presumably includes the null-terminator, because other + // functions that have the MAX_PATH limit, such as CreateFileA, + // actually include it. + return ::_wmkdir(as_windows_path(name, 248).c_str()); +} + +int access(const char* pathname, int mode) { + return ::_waccess(as_windows_path(pathname, MAX_PATH).c_str(), mode); +} + +} // namespace win32 +} // namespace io +} // namespace protobuf +} // namespace google + +#endif // defined(_WIN32) |