78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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//
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// File - Platform independent interface for a File class
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//
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#ifndef WVCDM_UTIL_FILE_STORE_H_
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#define WVCDM_UTIL_FILE_STORE_H_
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <vector>
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#include "disallow_copy_and_assign.h"
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#include "platform.h"
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#include "util_common.h"
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namespace wvcdm {
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// File class. The implementation is platform dependent.
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class CORE_UTIL_EXPORT File {
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public:
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File() {}
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virtual ~File() {}
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virtual ssize_t Read(char* buffer, size_t bytes) = 0;
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virtual ssize_t Write(const char* buffer, size_t bytes) = 0;
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friend class FileSystem;
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CORE_DISALLOW_COPY_AND_ASSIGN(File);
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};
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class CORE_UTIL_EXPORT FileSystem {
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public:
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FileSystem();
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FileSystem(const std::string& origin, void* extra_data);
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virtual ~FileSystem();
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class Impl;
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// defines as bit flag
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enum OpenFlags {
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kNoFlags = 0,
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kCreate = 1,
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kReadOnly = 2, // defaults to read and write access
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kTruncate = 4
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};
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virtual std::unique_ptr<File> Open(const std::string& file_path, int flags);
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virtual bool Exists(const std::string& file_path);
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virtual bool Remove(const std::string& file_path);
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virtual ssize_t FileSize(const std::string& file_path);
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// Return the filenames stored at dir_path.
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// dir_path will be stripped from the returned names.
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virtual bool List(const std::string& dir_path,
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std::vector<std::string>* names);
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const std::string& origin() const { return origin_; }
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void set_origin(const std::string& origin);
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const std::string& identifier() const { return identifier_; }
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void set_identifier(const std::string& identifier);
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bool IsGlobal() const { return identifier_.empty(); }
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private:
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std::unique_ptr<FileSystem::Impl> impl_;
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std::string origin_;
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std::string identifier_;
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CORE_DISALLOW_COPY_AND_ASSIGN(FileSystem);
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};
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} // namespace wvcdm
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#endif // WVCDM_UTIL_FILE_STORE_H_
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