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textfile_reader.cc
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textfile_reader.cc
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/**
* 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.
*/
#include "singa/io/reader.h"
#include "singa/utils/logging.h"
namespace singa {
namespace io {
bool TextFileReader::Open(const std::string& path) {
path_ = path;
fdat_.open(path_, std::ios::in);
if (!fdat_.is_open())
LOG(WARNING) << "Cannot open file " << path_;
return fdat_.is_open();
}
void TextFileReader::Close() {
if (fdat_.is_open()) fdat_.close();
}
bool TextFileReader::Read(std::string* key, std::string* value) {
CHECK(fdat_.is_open()) << "File not open!";
key->clear();
value->clear();
if (!std::getline(fdat_, *value)) {
if (fdat_.eof())
return false;
else
LOG(FATAL) << "Error in reading text file";
}
*key = std::to_string(lineNo_++);
return true;
}
int TextFileReader::Count() {
std::ifstream fin(path_, std::ios::in);
CHECK(fin.is_open()) << "Cannot create file " << path_;
int count = 0;
string line;
while (!fin.eof()) {
std::getline(fin, line);
if (line != "") count++;
}
fin.close();
return count;
}
void TextFileReader::SeekToFirst() {
CHECK(fdat_.is_open());
lineNo_ = 0;
fdat_.clear();
fdat_.seekg(0);
}
} // namespace io
} // namespace singa