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91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
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// Copyright 2017 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 THIRD_PARTY_ZLIB_GOOGLE_ZIP_WRITER_H_
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#define THIRD_PARTY_ZLIB_GOOGLE_ZIP_WRITER_H_
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#include <memory>
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#include <vector>
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#include "base/files/file_path.h"
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#include "build/build_config.h"
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#include "third_party/zlib/google/zip.h"
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#if defined(USE_SYSTEM_MINIZIP)
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#include <minizip/unzip.h>
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#include <minizip/zip.h>
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#else
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#include "third_party/zlib/contrib/minizip/unzip.h"
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#include "third_party/zlib/contrib/minizip/zip.h"
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#endif
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namespace zip {
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namespace internal {
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// A class used to write entries to a ZIP file and buffering the reading of
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// files to limit the number of calls to the FileAccessor. This is for
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// performance reasons as these calls may be expensive when IPC based).
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// This class is so far internal and only used by zip.cc, but could be made
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// public if needed.
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class ZipWriter {
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public:
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// Creates a writer that will write a ZIP file to |zip_file_fd|/|zip_file|
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// and which entries (specifies with AddEntries) are relative to |root_dir|.
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// All file reads are performed using |file_accessor|.
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#if defined(OS_POSIX)
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static std::unique_ptr<ZipWriter> CreateWithFd(int zip_file_fd,
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const base::FilePath& root_dir,
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FileAccessor* file_accessor);
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#endif
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static std::unique_ptr<ZipWriter> Create(const base::FilePath& zip_file,
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const base::FilePath& root_dir,
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FileAccessor* file_accessor);
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~ZipWriter();
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// Writes the files at |paths| to the ZIP file and closes this Zip file.
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// Note that the the FilePaths must be relative to |root_dir| specified in the
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// Create method.
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// Returns true if all entries were written successfuly.
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bool WriteEntries(const std::vector<base::FilePath>& paths);
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private:
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ZipWriter(zipFile zip_file,
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const base::FilePath& root_dir,
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FileAccessor* file_accessor);
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// Writes the pending entries to the ZIP file if there are at least
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// |kMaxPendingEntriesCount| of them. If |force| is true, all pending entries
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// are written regardless of how many there are.
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// Returns false if writing an entry fails, true if no entry was written or
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// there was no error writing entries.
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bool FlushEntriesIfNeeded(bool force);
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// Adds the files at |paths| to the ZIP file. These FilePaths must be relative
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// to |root_dir| specified in the Create method.
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bool AddEntries(const std::vector<base::FilePath>& paths);
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// Closes the ZIP file.
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// Returns true if successful, false otherwise (typically if an entry failed
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// to be written).
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bool Close();
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// The entries that have been added but not yet written to the ZIP file.
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std::vector<base::FilePath> pending_entries_;
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// The actual zip file.
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zipFile zip_file_;
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// Path to the directory entry paths are relative to.
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base::FilePath root_dir_;
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// Abstraction over file access methods used to read files.
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FileAccessor* file_accessor_;
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DISALLOW_COPY_AND_ASSIGN(ZipWriter);
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};
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} // namespace internal
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} // namespace zip
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#endif // THIRD_PARTY_ZLIB_GOOGLE_ZIP_WRITER_H_
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