Differential D4004 Diff 11103 src/leveldb/helpers/memenv/memenv.cc

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src/leveldb/helpers/memenv/memenv.cc

Show First 20 Lines • Show All 170 Lines • ▼ Show 20 Lines	virtual Status Skip(uint64_t n) {
const uint64_t available = file_->Size() - pos_;		const uint64_t available = file_->Size() - pos_;
if (n > available) {		if (n > available) {
n = available;		n = available;
}		}
pos_ += n;		pos_ += n;
return Status::OK();		return Status::OK();
}		}

		virtual std::string GetName() const { return "[memenv]"; }
private:		private:
FileState* file_;		FileState* file_;
uint64_t pos_;		uint64_t pos_;
};		};

class RandomAccessFileImpl : public RandomAccessFile {		class RandomAccessFileImpl : public RandomAccessFile {
public:		public:
explicit RandomAccessFileImpl(FileState* file) : file_(file) {		explicit RandomAccessFileImpl(FileState* file) : file_(file) {
file_->Ref();		file_->Ref();
}		}

~RandomAccessFileImpl() {		~RandomAccessFileImpl() {
file_->Unref();		file_->Unref();
}		}

virtual Status Read(uint64_t offset, size_t n, Slice* result,		virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const {		char* scratch) const {
return file_->Read(offset, n, result, scratch);		return file_->Read(offset, n, result, scratch);
}		}

		virtual std::string GetName() const { return "[memenv]"; }
private:		private:
FileState* file_;		FileState* file_;
};		};

class WritableFileImpl : public WritableFile {		class WritableFileImpl : public WritableFile {
public:		public:
WritableFileImpl(FileState* file) : file_(file) {		WritableFileImpl(FileState* file) : file_(file) {
file_->Ref();		file_->Ref();
}		}

~WritableFileImpl() {		~WritableFileImpl() {
file_->Unref();		file_->Unref();
}		}

virtual Status Append(const Slice& data) {		virtual Status Append(const Slice& data) {
return file_->Append(data);		return file_->Append(data);
}		}

virtual Status Close() { return Status::OK(); }		virtual Status Close() { return Status::OK(); }
virtual Status Flush() { return Status::OK(); }		virtual Status Flush() { return Status::OK(); }
virtual Status Sync() { return Status::OK(); }		virtual Status Sync() { return Status::OK(); }

		virtual std::string GetName() const { return "[memenv]"; }
private:		private:
FileState* file_;		FileState* file_;
};		};

class NoOpLogger : public Logger {		class NoOpLogger : public Logger {
public:		public:
virtual void Logv(const char* format, va_list ap) { }		virtual void Logv(const char* format, va_list ap) { }
};		};
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