| // Copyright (c) 2006-2008 The Chromium 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 "base/file_util.h" |
| |
| #include <windows.h> |
| #include <shellapi.h> |
| #include <shlobj.h> |
| #include <time.h> |
| #include <string> |
| |
| #include "base/file_path.h" |
| #include "base/logging.h" |
| #include "base/scoped_handle.h" |
| #include "base/string_util.h" |
| #include "base/time.h" |
| #include "base/win_util.h" |
| |
| namespace file_util { |
| |
| std::wstring GetDirectoryFromPath(const std::wstring& path) { |
| wchar_t path_buffer[MAX_PATH]; |
| wchar_t* file_ptr = NULL; |
| if (GetFullPathName(path.c_str(), MAX_PATH, path_buffer, &file_ptr) == 0) |
| return L""; |
| |
| std::wstring::size_type length = |
| file_ptr ? file_ptr - path_buffer : path.length(); |
| std::wstring directory(path, 0, length); |
| TrimTrailingSeparator(&directory); |
| return directory; |
| } |
| |
| bool AbsolutePath(FilePath* path) { |
| wchar_t file_path_buf[MAX_PATH]; |
| if (!_wfullpath(file_path_buf, path->value().c_str(), MAX_PATH)) |
| return false; |
| *path = FilePath(file_path_buf); |
| return true; |
| } |
| |
| int CountFilesCreatedAfter(const FilePath& path, |
| const base::Time& comparison_time) { |
| int file_count = 0; |
| FILETIME comparison_filetime(comparison_time.ToFileTime()); |
| |
| WIN32_FIND_DATA find_file_data; |
| // All files in given dir |
| std::wstring filename_spec = path.Append(L"*").value(); |
| HANDLE find_handle = FindFirstFile(filename_spec.c_str(), &find_file_data); |
| if (find_handle != INVALID_HANDLE_VALUE) { |
| do { |
| // Don't count current or parent directories. |
| if ((wcscmp(find_file_data.cFileName, L"..") == 0) || |
| (wcscmp(find_file_data.cFileName, L".") == 0)) |
| continue; |
| |
| long result = CompareFileTime(&find_file_data.ftCreationTime, |
| &comparison_filetime); |
| // File was created after or on comparison time |
| if ((result == 1) || (result == 0)) |
| ++file_count; |
| } while (FindNextFile(find_handle, &find_file_data)); |
| FindClose(find_handle); |
| } |
| |
| return file_count; |
| } |
| |
| bool Delete(const FilePath& path, bool recursive) { |
| if (path.value().length() >= MAX_PATH) |
| return false; |
| |
| // If we're not recursing use DeleteFile; it should be faster. DeleteFile |
| // fails if passed a directory though, which is why we fall through on |
| // failure to the SHFileOperation. |
| if (!recursive && DeleteFile(path.value().c_str()) != 0) |
| return true; |
| |
| // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, |
| // so we have to use wcscpy because wcscpy_s writes non-NULLs |
| // into the rest of the buffer. |
| wchar_t double_terminated_path[MAX_PATH + 1] = {0}; |
| #pragma warning(suppress:4996) // don't complain about wcscpy deprecation |
| wcscpy(double_terminated_path, path.value().c_str()); |
| |
| SHFILEOPSTRUCT file_operation = {0}; |
| file_operation.wFunc = FO_DELETE; |
| file_operation.pFrom = double_terminated_path; |
| file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION; |
| if (!recursive) |
| file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; |
| int err = SHFileOperation(&file_operation); |
| // Some versions of Windows return ERROR_FILE_NOT_FOUND when |
| // deleting an empty directory. |
| return (err == 0 || err == ERROR_FILE_NOT_FOUND); |
| } |
| |
| bool Move(const FilePath& from_path, const FilePath& to_path) { |
| // NOTE: I suspect we could support longer paths, but that would involve |
| // analyzing all our usage of files. |
| if (from_path.value().length() >= MAX_PATH || |
| to_path.value().length() >= MAX_PATH) { |
| return false; |
| } |
| if (MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), |
| MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING) != 0) |
| return true; |
| if (DirectoryExists(from_path)) { |
| // MoveFileEx fails if moving directory across volumes. We will simulate |
| // the move by using Copy and Delete. Ideally we could check whether |
| // from_path and to_path are indeed in different volumes. |
| return CopyAndDeleteDirectory(from_path, to_path); |
| } |
| return false; |
| } |
| |
| bool ReplaceFile(const FilePath& from_path, const FilePath& to_path) { |
| // Make sure that the target file exists. |
| HANDLE target_file = ::CreateFile(to_path.value().c_str(), 0, |
| FILE_SHARE_READ | FILE_SHARE_WRITE, |
| NULL, CREATE_NEW, |
| FILE_ATTRIBUTE_NORMAL, NULL); |
| if (target_file != INVALID_HANDLE_VALUE) |
| ::CloseHandle(target_file); |
| return ::ReplaceFile(to_path.value().c_str(), from_path.value().c_str(), |
| NULL, 0, NULL, NULL) ? true : false; |
| } |
| |
| bool CopyFile(const FilePath& from_path, const FilePath& to_path) { |
| // NOTE: I suspect we could support longer paths, but that would involve |
| // analyzing all our usage of files. |
| if (from_path.value().length() >= MAX_PATH || |
| to_path.value().length() >= MAX_PATH) { |
| return false; |
| } |
| return (::CopyFile(from_path.value().c_str(), to_path.value().c_str(), |
| false) != 0); |
| } |
| |
| bool ShellCopy(const FilePath& from_path, const FilePath& to_path, |
| bool recursive) { |
| // NOTE: I suspect we could support longer paths, but that would involve |
| // analyzing all our usage of files. |
| if (from_path.value().length() >= MAX_PATH || |
| to_path.value().length() >= MAX_PATH) { |
| return false; |
| } |
| |
| // SHFILEOPSTRUCT wants the path to be terminated with two NULLs, |
| // so we have to use wcscpy because wcscpy_s writes non-NULLs |
| // into the rest of the buffer. |
| wchar_t double_terminated_path_from[MAX_PATH + 1] = {0}; |
| wchar_t double_terminated_path_to[MAX_PATH + 1] = {0}; |
| #pragma warning(suppress:4996) // don't complain about wcscpy deprecation |
| wcscpy(double_terminated_path_from, from_path.value().c_str()); |
| #pragma warning(suppress:4996) // don't complain about wcscpy deprecation |
| wcscpy(double_terminated_path_to, to_path.value().c_str()); |
| |
| SHFILEOPSTRUCT file_operation = {0}; |
| file_operation.wFunc = FO_COPY; |
| file_operation.pFrom = double_terminated_path_from; |
| file_operation.pTo = double_terminated_path_to; |
| file_operation.fFlags = FOF_NOERRORUI | FOF_SILENT | FOF_NOCONFIRMATION | |
| FOF_NOCONFIRMMKDIR; |
| if (!recursive) |
| file_operation.fFlags |= FOF_NORECURSION | FOF_FILESONLY; |
| |
| return (SHFileOperation(&file_operation) == 0); |
| } |
| |
| bool CopyDirectory(const FilePath& from_path, const FilePath& to_path, |
| bool recursive) { |
| if (recursive) |
| return ShellCopy(from_path, to_path, true); |
| |
| // Instead of creating a new directory, we copy the old one to include the |
| // security information of the folder as part of the copy. |
| if (!PathExists(to_path)) { |
| // Except that Vista fails to do that, and instead do a recursive copy if |
| // the target directory doesn't exist. |
| if (win_util::GetWinVersion() >= win_util::WINVERSION_VISTA) |
| CreateDirectory(to_path); |
| else |
| ShellCopy(from_path, to_path, false); |
| } |
| |
| FilePath directory = from_path.Append(L"*.*"); |
| return ShellCopy(directory, to_path, false); |
| } |
| |
| bool CopyAndDeleteDirectory(const FilePath& from_path, |
| const FilePath& to_path) { |
| if (CopyDirectory(from_path, to_path, true)) { |
| if (Delete(from_path, true)) { |
| return true; |
| } |
| // Like Move, this function is not transactional, so we just |
| // leave the copied bits behind if deleting from_path fails. |
| // If to_path exists previously then we have already overwritten |
| // it by now, we don't get better off by deleting the new bits. |
| } |
| return false; |
| } |
| |
| |
| bool PathExists(const FilePath& path) { |
| return (GetFileAttributes(path.value().c_str()) != INVALID_FILE_ATTRIBUTES); |
| } |
| |
| bool PathIsWritable(const FilePath& path) { |
| HANDLE dir = |
| CreateFile(path.value().c_str(), FILE_ADD_FILE, |
| FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, |
| NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); |
| |
| if (dir == INVALID_HANDLE_VALUE) |
| return false; |
| |
| CloseHandle(dir); |
| return true; |
| } |
| |
| bool DirectoryExists(const FilePath& path) { |
| DWORD fileattr = GetFileAttributes(path.value().c_str()); |
| if (fileattr != INVALID_FILE_ATTRIBUTES) |
| return (fileattr & FILE_ATTRIBUTE_DIRECTORY) != 0; |
| return false; |
| } |
| |
| bool GetFileCreationLocalTimeFromHandle(HANDLE file_handle, |
| LPSYSTEMTIME creation_time) { |
| if (!file_handle) |
| return false; |
| |
| FILETIME utc_filetime; |
| if (!GetFileTime(file_handle, &utc_filetime, NULL, NULL)) |
| return false; |
| |
| FILETIME local_filetime; |
| if (!FileTimeToLocalFileTime(&utc_filetime, &local_filetime)) |
| return false; |
| |
| return !!FileTimeToSystemTime(&local_filetime, creation_time); |
| } |
| |
| bool GetFileCreationLocalTime(const std::wstring& filename, |
| LPSYSTEMTIME creation_time) { |
| ScopedHandle file_handle( |
| CreateFile(filename.c_str(), GENERIC_READ, |
| FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, |
| OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)); |
| return GetFileCreationLocalTimeFromHandle(file_handle.Get(), creation_time); |
| } |
| |
| bool ResolveShortcut(FilePath* path) { |
| HRESULT result; |
| IShellLink *shell = NULL; |
| bool is_resolved = false; |
| |
| // Get pointer to the IShellLink interface |
| result = CoCreateInstance(CLSID_ShellLink, NULL, |
| CLSCTX_INPROC_SERVER, IID_IShellLink, |
| reinterpret_cast<LPVOID*>(&shell)); |
| if (SUCCEEDED(result)) { |
| IPersistFile *persist = NULL; |
| // Query IShellLink for the IPersistFile interface |
| result = shell->QueryInterface(IID_IPersistFile, |
| reinterpret_cast<LPVOID*>(&persist)); |
| if (SUCCEEDED(result)) { |
| WCHAR temp_path[MAX_PATH]; |
| // Load the shell link |
| result = persist->Load(path->value().c_str(), STGM_READ); |
| if (SUCCEEDED(result)) { |
| // Try to find the target of a shortcut |
| result = shell->Resolve(0, SLR_NO_UI); |
| if (SUCCEEDED(result)) { |
| result = shell->GetPath(temp_path, MAX_PATH, |
| NULL, SLGP_UNCPRIORITY); |
| *path = FilePath(temp_path); |
| is_resolved = true; |
| } |
| } |
| } |
| if (persist) |
| persist->Release(); |
| } |
| if (shell) |
| shell->Release(); |
| |
| return is_resolved; |
| } |
| |
| bool CreateShortcutLink(const wchar_t *source, const wchar_t *destination, |
| const wchar_t *working_dir, const wchar_t *arguments, |
| const wchar_t *description, const wchar_t *icon, |
| int icon_index) { |
| IShellLink *i_shell_link = NULL; |
| IPersistFile *i_persist_file = NULL; |
| |
| // Get pointer to the IShellLink interface |
| HRESULT result = CoCreateInstance(CLSID_ShellLink, NULL, |
| CLSCTX_INPROC_SERVER, IID_IShellLink, |
| reinterpret_cast<LPVOID*>(&i_shell_link)); |
| if (FAILED(result)) |
| return false; |
| |
| // Query IShellLink for the IPersistFile interface |
| result = i_shell_link->QueryInterface(IID_IPersistFile, |
| reinterpret_cast<LPVOID*>(&i_persist_file)); |
| if (FAILED(result)) { |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (FAILED(i_shell_link->SetPath(source))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (working_dir && FAILED(i_shell_link->SetWorkingDirectory(working_dir))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (arguments && FAILED(i_shell_link->SetArguments(arguments))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (description && FAILED(i_shell_link->SetDescription(description))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (icon && FAILED(i_shell_link->SetIconLocation(icon, icon_index))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| result = i_persist_file->Save(destination, TRUE); |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return SUCCEEDED(result); |
| } |
| |
| |
| bool UpdateShortcutLink(const wchar_t *source, const wchar_t *destination, |
| const wchar_t *working_dir, const wchar_t *arguments, |
| const wchar_t *description, const wchar_t *icon, |
| int icon_index) { |
| // Get pointer to the IPersistFile interface and load existing link |
| IShellLink *i_shell_link = NULL; |
| if (FAILED(CoCreateInstance(CLSID_ShellLink, NULL, |
| CLSCTX_INPROC_SERVER, IID_IShellLink, |
| reinterpret_cast<LPVOID*>(&i_shell_link)))) |
| return false; |
| |
| IPersistFile *i_persist_file = NULL; |
| if (FAILED(i_shell_link->QueryInterface( |
| IID_IPersistFile, reinterpret_cast<LPVOID*>(&i_persist_file)))) { |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (FAILED(i_persist_file->Load(destination, 0))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (source && FAILED(i_shell_link->SetPath(source))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (working_dir && FAILED(i_shell_link->SetWorkingDirectory(working_dir))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (arguments && FAILED(i_shell_link->SetArguments(arguments))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (description && FAILED(i_shell_link->SetDescription(description))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| if (icon && FAILED(i_shell_link->SetIconLocation(icon, icon_index))) { |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return false; |
| } |
| |
| HRESULT result = i_persist_file->Save(destination, TRUE); |
| i_persist_file->Release(); |
| i_shell_link->Release(); |
| return SUCCEEDED(result); |
| } |
| |
| bool IsDirectoryEmpty(const std::wstring& dir_path) { |
| FileEnumerator files(FilePath(dir_path), false, |
| static_cast<FileEnumerator::FILE_TYPE>( |
| FileEnumerator::FILES | FileEnumerator::DIRECTORIES)); |
| if (files.Next().value().empty()) |
| return true; |
| return false; |
| } |
| |
| bool GetTempDir(FilePath* path) { |
| wchar_t temp_path[MAX_PATH + 1]; |
| DWORD path_len = ::GetTempPath(MAX_PATH, temp_path); |
| if (path_len >= MAX_PATH || path_len <= 0) |
| return false; |
| // TODO(evanm): the old behavior of this function was to always strip the |
| // trailing slash. We duplicate this here, but it shouldn't be necessary |
| // when everyone is using the appropriate FilePath APIs. |
| std::wstring path_str(temp_path); |
| TrimTrailingSeparator(&path_str); |
| *path = FilePath(path_str); |
| return true; |
| } |
| |
| bool GetShmemTempDir(FilePath* path) { |
| return GetTempDir(path); |
| } |
| |
| bool CreateTemporaryFile(FilePath* path) { |
| FilePath temp_file; |
| |
| if (!GetTempDir(path)) |
| return false; |
| |
| if (CreateTemporaryFileInDir(*path, &temp_file)) { |
| *path = temp_file; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| FILE* CreateAndOpenTemporaryShmemFile(FilePath* path) { |
| return CreateAndOpenTemporaryFile(path); |
| } |
| |
| // On POSIX we have semantics to create and open a temporary file |
| // atomically. |
| // TODO(jrg): is there equivalent call to use on Windows instead of |
| // going 2-step? |
| FILE* CreateAndOpenTemporaryFileInDir(const FilePath& dir, FilePath* path) { |
| if (!CreateTemporaryFileInDir(dir, path)) { |
| return NULL; |
| } |
| // Open file in binary mode, to avoid problems with fwrite. On Windows |
| // it replaces \n's with \r\n's, which may surprise you. |
| // Reference: http://msdn.microsoft.com/en-us/library/h9t88zwz(VS.71).aspx |
| return OpenFile(*path, "wb+"); |
| } |
| |
| bool CreateTemporaryFileInDir(const FilePath& dir, |
| FilePath* temp_file) { |
| wchar_t temp_name[MAX_PATH + 1]; |
| |
| if (!GetTempFileName(dir.value().c_str(), L"", 0, temp_name)) |
| return false; // fail! |
| |
| DWORD path_len = GetLongPathName(temp_name, temp_name, MAX_PATH); |
| if (path_len > MAX_PATH + 1 || path_len == 0) |
| return false; // fail! |
| |
| std::wstring temp_file_str; |
| temp_file_str.assign(temp_name, path_len); |
| *temp_file = FilePath(temp_file_str); |
| return true; |
| } |
| |
| bool CreateNewTempDirectory(const FilePath::StringType& prefix, |
| FilePath* new_temp_path) { |
| FilePath system_temp_dir; |
| if (!GetTempDir(&system_temp_dir)) |
| return false; |
| |
| FilePath path_to_create; |
| srand(static_cast<uint32>(time(NULL))); |
| |
| int count = 0; |
| while (count < 50) { |
| // Try create a new temporary directory with random generated name. If |
| // the one exists, keep trying another path name until we reach some limit. |
| path_to_create = system_temp_dir; |
| std::wstring new_dir_name; |
| new_dir_name.assign(prefix); |
| new_dir_name.append(IntToWString(rand() % kint16max)); |
| path_to_create = path_to_create.Append(new_dir_name); |
| |
| if (::CreateDirectory(path_to_create.value().c_str(), NULL)) |
| break; |
| count++; |
| } |
| |
| if (count == 50) { |
| return false; |
| } |
| |
| *new_temp_path = path_to_create; |
| return true; |
| } |
| |
| bool CreateDirectory(const FilePath& full_path) { |
| if (DirectoryExists(full_path)) |
| return true; |
| int err = SHCreateDirectoryEx(NULL, full_path.value().c_str(), NULL); |
| return err == ERROR_SUCCESS; |
| } |
| |
| bool GetFileInfo(const FilePath& file_path, FileInfo* results) { |
| WIN32_FILE_ATTRIBUTE_DATA attr; |
| if (!GetFileAttributesEx(file_path.ToWStringHack().c_str(), |
| GetFileExInfoStandard, &attr)) { |
| return false; |
| } |
| |
| ULARGE_INTEGER size; |
| size.HighPart = attr.nFileSizeHigh; |
| size.LowPart = attr.nFileSizeLow; |
| results->size = size.QuadPart; |
| |
| results->is_directory = |
| (attr.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0; |
| results->last_modified = base::Time::FromFileTime(attr.ftLastWriteTime); |
| |
| return true; |
| } |
| |
| FILE* OpenFile(const FilePath& filename, const char* mode) { |
| std::wstring w_mode = ASCIIToWide(std::string(mode)); |
| FILE* file; |
| if (_wfopen_s(&file, filename.value().c_str(), w_mode.c_str()) != 0) { |
| return NULL; |
| } |
| return file; |
| } |
| |
| FILE* OpenFile(const std::string& filename, const char* mode) { |
| FILE* file; |
| if (fopen_s(&file, filename.c_str(), mode) != 0) { |
| return NULL; |
| } |
| return file; |
| } |
| |
| int ReadFile(const FilePath& filename, char* data, int size) { |
| ScopedHandle file(CreateFile(filename.value().c_str(), |
| GENERIC_READ, |
| FILE_SHARE_READ | FILE_SHARE_WRITE, |
| NULL, |
| OPEN_EXISTING, |
| FILE_FLAG_SEQUENTIAL_SCAN, |
| NULL)); |
| if (file == INVALID_HANDLE_VALUE) |
| return -1; |
| |
| int ret_value; |
| DWORD read; |
| if (::ReadFile(file, data, size, &read, NULL) && read == size) { |
| ret_value = static_cast<int>(read); |
| } else { |
| ret_value = -1; |
| } |
| |
| return ret_value; |
| } |
| |
| int WriteFile(const FilePath& filename, const char* data, int size) { |
| ScopedHandle file(CreateFile(filename.value().c_str(), |
| GENERIC_WRITE, |
| 0, |
| NULL, |
| CREATE_ALWAYS, |
| 0, |
| NULL)); |
| if (file == INVALID_HANDLE_VALUE) { |
| LOG(WARNING) << "CreateFile failed for path " << filename.value() << |
| " error code=" << GetLastError() << |
| " error text=" << win_util::FormatLastWin32Error(); |
| return -1; |
| } |
| |
| DWORD written; |
| BOOL result = ::WriteFile(file, data, size, &written, NULL); |
| if (result && written == size) |
| return static_cast<int>(written); |
| |
| if (!result) { |
| // WriteFile failed. |
| LOG(WARNING) << "writing file " << filename.value() << |
| " failed, error code=" << GetLastError() << |
| " description=" << win_util::FormatLastWin32Error(); |
| } else { |
| // Didn't write all the bytes. |
| LOG(WARNING) << "wrote" << written << " bytes to " << |
| filename.value() << " expected " << size; |
| } |
| return -1; |
| } |
| |
| bool RenameFileAndResetSecurityDescriptor(const FilePath& source_file_path, |
| const FilePath& target_file_path) { |
| // The parameters to SHFileOperation must be terminated with 2 NULL chars. |
| std::wstring source = source_file_path.value(); |
| std::wstring target = target_file_path.value(); |
| |
| source.append(1, L'\0'); |
| target.append(1, L'\0'); |
| |
| SHFILEOPSTRUCT move_info = {0}; |
| move_info.wFunc = FO_MOVE; |
| move_info.pFrom = source.c_str(); |
| move_info.pTo = target.c_str(); |
| move_info.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOERRORUI | |
| FOF_NOCONFIRMMKDIR | FOF_NOCOPYSECURITYATTRIBS; |
| |
| if (0 != SHFileOperation(&move_info)) |
| return false; |
| |
| return true; |
| } |
| |
| // Gets the current working directory for the process. |
| bool GetCurrentDirectory(FilePath* dir) { |
| wchar_t system_buffer[MAX_PATH]; |
| system_buffer[0] = 0; |
| DWORD len = ::GetCurrentDirectory(MAX_PATH, system_buffer); |
| if (len == 0 || len > MAX_PATH) |
| return false; |
| // TODO(evanm): the old behavior of this function was to always strip the |
| // trailing slash. We duplicate this here, but it shouldn't be necessary |
| // when everyone is using the appropriate FilePath APIs. |
| std::wstring dir_str(system_buffer); |
| file_util::TrimTrailingSeparator(&dir_str); |
| *dir = FilePath(dir_str); |
| return true; |
| } |
| |
| // Sets the current working directory for the process. |
| bool SetCurrentDirectory(const FilePath& directory) { |
| BOOL ret = ::SetCurrentDirectory(directory.value().c_str()); |
| return ret != 0; |
| } |
| |
| /////////////////////////////////////////////// |
| // FileEnumerator |
| |
| FileEnumerator::FileEnumerator(const FilePath& root_path, |
| bool recursive, |
| FileEnumerator::FILE_TYPE file_type) |
| : recursive_(recursive), |
| file_type_(file_type), |
| is_in_find_op_(false), |
| find_handle_(INVALID_HANDLE_VALUE) { |
| // INCLUDE_DOT_DOT must not be specified if recursive. |
| DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_))); |
| pending_paths_.push(root_path); |
| } |
| |
| FileEnumerator::FileEnumerator(const FilePath& root_path, |
| bool recursive, |
| FileEnumerator::FILE_TYPE file_type, |
| const FilePath::StringType& pattern) |
| : recursive_(recursive), |
| file_type_(file_type), |
| is_in_find_op_(false), |
| pattern_(pattern), |
| find_handle_(INVALID_HANDLE_VALUE) { |
| // INCLUDE_DOT_DOT must not be specified if recursive. |
| DCHECK(!(recursive && (INCLUDE_DOT_DOT & file_type_))); |
| pending_paths_.push(root_path); |
| } |
| |
| FileEnumerator::~FileEnumerator() { |
| if (find_handle_ != INVALID_HANDLE_VALUE) |
| FindClose(find_handle_); |
| } |
| |
| void FileEnumerator::GetFindInfo(FindInfo* info) { |
| DCHECK(info); |
| |
| if (!is_in_find_op_) |
| return; |
| |
| memcpy(info, &find_data_, sizeof(*info)); |
| } |
| |
| FilePath FileEnumerator::Next() { |
| if (!is_in_find_op_) { |
| if (pending_paths_.empty()) |
| return FilePath(); |
| |
| // The last find FindFirstFile operation is done, prepare a new one. |
| root_path_ = pending_paths_.top(); |
| pending_paths_.pop(); |
| |
| // Start a new find operation. |
| FilePath src = root_path_; |
| |
| if (pattern_.value().empty()) |
| src = src.Append(L"*"); // No pattern = match everything. |
| else |
| src = src.Append(pattern_); |
| |
| find_handle_ = FindFirstFile(src.value().c_str(), &find_data_); |
| is_in_find_op_ = true; |
| |
| } else { |
| // Search for the next file/directory. |
| if (!FindNextFile(find_handle_, &find_data_)) { |
| FindClose(find_handle_); |
| find_handle_ = INVALID_HANDLE_VALUE; |
| } |
| } |
| |
| if (INVALID_HANDLE_VALUE == find_handle_) { |
| is_in_find_op_ = false; |
| |
| // This is reached when we have finished a directory and are advancing to |
| // the next one in the queue. We applied the pattern (if any) to the files |
| // in the root search directory, but for those directories which were |
| // matched, we want to enumerate all files inside them. This will happen |
| // when the handle is empty. |
| pattern_ = FilePath(); |
| |
| return Next(); |
| } |
| |
| FilePath cur_file(find_data_.cFileName); |
| if (ShouldSkip(cur_file)) |
| return Next(); |
| |
| // Construct the absolute filename. |
| cur_file = root_path_.Append(cur_file); |
| |
| if (find_data_.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { |
| if (recursive_) { |
| // If |cur_file| is a directory, and we are doing recursive searching, add |
| // it to pending_paths_ so we scan it after we finish scanning this |
| // directory. |
| pending_paths_.push(cur_file); |
| } |
| return (file_type_ & FileEnumerator::DIRECTORIES) ? cur_file : Next(); |
| } |
| return (file_type_ & FileEnumerator::FILES) ? cur_file : Next(); |
| } |
| |
| /////////////////////////////////////////////// |
| // MemoryMappedFile |
| |
| MemoryMappedFile::MemoryMappedFile() |
| : file_(INVALID_HANDLE_VALUE), |
| file_mapping_(INVALID_HANDLE_VALUE), |
| data_(NULL), |
| length_(INVALID_FILE_SIZE) { |
| } |
| |
| bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) { |
| file_ = ::CreateFile(file_name.value().c_str(), GENERIC_READ, |
| FILE_SHARE_READ, NULL, OPEN_EXISTING, |
| FILE_ATTRIBUTE_NORMAL, NULL); |
| if (file_ == INVALID_HANDLE_VALUE) |
| return false; |
| |
| length_ = ::GetFileSize(file_, NULL); |
| if (length_ == INVALID_FILE_SIZE) |
| return false; |
| |
| file_mapping_ = ::CreateFileMapping(file_, NULL, PAGE_READONLY, |
| 0, length_, NULL); |
| if (file_mapping_ == INVALID_HANDLE_VALUE) |
| return false; |
| |
| data_ = static_cast<uint8*>( |
| ::MapViewOfFile(file_mapping_, FILE_MAP_READ, 0, 0, length_)); |
| return data_ != NULL; |
| } |
| |
| void MemoryMappedFile::CloseHandles() { |
| if (data_) |
| ::UnmapViewOfFile(data_); |
| if (file_mapping_ != INVALID_HANDLE_VALUE) |
| ::CloseHandle(file_mapping_); |
| if (file_ != INVALID_HANDLE_VALUE) |
| ::CloseHandle(file_); |
| |
| data_ = NULL; |
| file_mapping_ = file_ = INVALID_HANDLE_VALUE; |
| length_ = INVALID_FILE_SIZE; |
| } |
| |
| } // namespace file_util |