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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_FILES_FILE_ENUMERATOR_H_
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#define BASE_FILES_FILE_ENUMERATOR_H_
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#include "base/base_export.h"
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#include "base/basictypes.h"
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#include "base/files/file_path.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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#elif defined(OS_POSIX)
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// A class for enumerating the files in a provided path. The order of the
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// results is not guaranteed.
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// This is blocking. Do not use on critical threads.
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// base::FileEnumerator enum(my_dir, false, base::FileEnumerator::FILES,
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// FILE_PATH_LITERAL("*.txt"));
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// for (base::FilePath name = enum.Next(); !name.empty(); name = enum.Next())
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class BASE_EXPORT FileEnumerator {
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// Note: copy & assign supported.
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class BASE_EXPORT FileInfo {
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bool IsDirectory() const;
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// The name of the file. This will not include any path information. This
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// is in constrast to the value returned by FileEnumerator.Next() which
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// includes the |root_path| passed into the FileEnumerator constructor.
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FilePath GetName() const;
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int64 GetSize() const;
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Time GetLastModifiedTime() const;
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// Note that the cAlternateFileName (used to hold the "short" 8.3 name)
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// of the WIN32_FIND_DATA will be empty. Since we don't use short file
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// names, we tell Windows to omit it which speeds up the query slightly.
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const WIN32_FIND_DATA& find_data() const { return find_data_; }
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#elif defined(OS_POSIX)
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const struct stat& stat() const { return stat_; }
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friend class FileEnumerator;
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WIN32_FIND_DATA find_data_;
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#elif defined(OS_POSIX)
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INCLUDE_DOT_DOT = 1 << 2,
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SHOW_SYM_LINKS = 1 << 4,
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// |root_path| is the starting directory to search for. It may or may not end
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// If |recursive| is true, this will enumerate all matches in any
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// subdirectories matched as well. It does a breadth-first search, so all
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// files in one directory will be returned before any files in a
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// |file_type|, a bit mask of FileType, specifies whether the enumerator
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// should match files, directories, or both.
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// |pattern| is an optional pattern for which files to match. This
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// works like shell globbing. For example, "*.txt" or "Foo???.doc".
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// However, be careful in specifying patterns that aren't cross platform
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// since the underlying code uses OS-specific matching routines. In general,
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// Windows matching is less featureful than others, so test there first.
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// If unspecified, this will match all files.
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// NOTE: the pattern only matches the contents of root_path, not files in
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// recursive subdirectories.
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// TODO(erikkay): Fix the pattern matching to work at all levels.
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FileEnumerator(const FilePath& root_path,
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FileEnumerator(const FilePath& root_path,
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const FilePath::StringType& pattern);
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// Returns the next file or an empty string if there are no more results.
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// The returned path will incorporate the |root_path| passed in the
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// constructor: "<root_path>/file_name.txt". If the |root_path| is absolute,
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// then so will be the result of Next().
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// Write the file info into |info|.
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FileInfo GetInfo() const;
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// Returns true if the given path should be skipped in enumeration.
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bool ShouldSkip(const FilePath& path);
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// True when find_data_ is valid.
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WIN32_FIND_DATA find_data_;
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#elif defined(OS_POSIX)
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// Read the filenames in source into the vector of DirectoryEntryInfo's
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static bool ReadDirectory(std::vector<FileInfo>* entries,
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const FilePath& source, bool show_links);
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// The files in the current directory
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std::vector<FileInfo> directory_entries_;
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// The next entry to use from the directory_entries_ vector
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size_t current_directory_entry_;
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FilePath::StringType pattern_; // Empty when we want to find everything.
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// A stack that keeps track of which subdirectories we still need to
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// enumerate in the breadth-first search.
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std::stack<FilePath> pending_paths_;
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DISALLOW_COPY_AND_ASSIGN(FileEnumerator);
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#endif // BASE_FILES_FILE_ENUMERATOR_H_