56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you under the Apache License, Version 2.0 (the
|
|
// "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing,
|
|
// software distributed under the License is distributed on an
|
|
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the License for the
|
|
// specific language governing permissions and limitations
|
|
// under the License.
|
|
|
|
#pragma once
|
|
|
|
#define _FILE_OFFSET_BITS 64
|
|
#include <stdio.h>
|
|
|
|
#include "exec/file_reader.h"
|
|
|
|
namespace doris {
|
|
|
|
class LocalFileReader : public FileReader {
|
|
public:
|
|
LocalFileReader(const std::string& path, int64_t start_offset);
|
|
virtual ~LocalFileReader();
|
|
|
|
virtual Status open() override;
|
|
|
|
// Read content to 'buf', 'buf_len' is the max size of this buffer.
|
|
// Return ok when read success, and 'buf_len' is set to size of read content
|
|
// If reach to end of file, the eof is set to true. meanwhile 'buf_len'
|
|
// is set to zero.
|
|
virtual Status read(uint8_t* buf, int64_t buf_len, int64_t* bytes_read, bool* eof) override;
|
|
virtual Status readat(int64_t position, int64_t nbytes, int64_t* bytes_read,
|
|
void* out) override;
|
|
virtual Status read_one_message(std::unique_ptr<uint8_t[]>* buf, int64_t* length) override;
|
|
virtual int64_t size() override;
|
|
virtual Status seek(int64_t position) override;
|
|
virtual Status tell(int64_t* position) override;
|
|
virtual void close() override;
|
|
virtual bool closed() override;
|
|
|
|
private:
|
|
std::string _path;
|
|
int64_t _current_offset;
|
|
int64_t _file_size;
|
|
FILE* _fp;
|
|
};
|
|
|
|
} // namespace doris
|