6486be64c3
* change picture to word * change picture to word * SHOW FULL TABLES WHERE Table_type != VIEW sql can not execute * change license description
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
// Copyright (c) 2017, Baidu.com, Inc. All Rights Reserved
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "exec/local_file_writer.h"
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#include "util/error_util.h"
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namespace palo {
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LocalFileWriter::LocalFileWriter(const std::string& path, int64_t start_offset)
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: _path(path), _start_offset(start_offset), _fp(nullptr) {
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}
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LocalFileWriter::~LocalFileWriter() {
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close();
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}
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Status LocalFileWriter::open() {
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_fp = fopen(_path.c_str(), "w+");
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if (_fp == nullptr) {
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std::stringstream ss;
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ss << "Open file failed. path=" << _path
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<< ", errno= " << errno
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<< ", description=" << get_str_err_msg();
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return Status(ss.str());
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}
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if (_start_offset != 0) {
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int success = fseek(_fp, _start_offset, SEEK_SET);
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if (success != 0) {
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std::stringstream ss;
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ss << "Seek to start_offset failed. offset=" << _start_offset
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<< ", errno= " << errno
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<< ", description=" << get_str_err_msg();
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return Status(ss.str());
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}
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}
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return Status::OK;
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}
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Status LocalFileWriter::write(const uint8_t* buf, size_t buf_len, size_t* written_len) {
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size_t bytes_written = fwrite(buf, 1, buf_len, _fp);
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if (bytes_written < buf_len) {
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std::stringstream error_msg;
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error_msg << "fail to write to file. "
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<< " len=" << buf_len
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<< ", path=" << _path
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<< ", failed with errno=" << errno
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<< ", description=" << get_str_err_msg();
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return Status(error_msg.str());
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}
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*written_len = bytes_written;
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return Status::OK;
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}
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void LocalFileWriter::close() {
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if (_fp != nullptr) {
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fclose(_fp);
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_fp = nullptr;
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}
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}
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} // end namespace palo
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