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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed 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 "file_reader.h"
#include <fcntl.h>
#include <unistd.h>
#include <sstream>
namespace profiler {
bool FileReader::Read(const std::string& file_path,
std::vector<std::string> *lines) {
std::string content;
if (Read(file_path, &content)) {
std::stringstream stream(content);
std::string line;
// Check if the last line with no eol-char trailing works
while (std::getline(stream, line)) {
lines->push_back(line);
}
return true;
}
return false;
}
bool FileReader::Read(const std::string &file_path, std::string *content) {
int file = open(file_path.c_str(), O_RDONLY);
if (file == -1) {
return false;
}
char buffer[kBufferSize_];
off_t offset = 0;
ssize_t read_size;
content->erase();
while ((read_size = pread(file, buffer, kBufferSize_, offset)) > 0) {
offset += read_size;
content->append(buffer, read_size);
}
close(file);
return true;
}
bool FileReader::FindTokenPosition(const std::string &line,
const int token_index, size_t *token_start) {
int index = -1;
size_t token_end;
while (*token_start < line.size()) {
token_end = line.find_first_of(" \t\r\n\f", *token_start);
if (token_end == std::string::npos) {
token_end = line.size();
}
if (token_end != *token_start && ++index == token_index) {
return true;
}
*token_start = token_end + 1;
}
return false;
}
bool FileReader::CompareToken(const std::string &line, const std::string &token,
const int token_index) {
size_t start_pos = 0;
bool is_found = FindTokenPosition(line, token_index, &start_pos);
return is_found && !line.compare(start_pos, token.length(), token);
}
} // namespace profiler
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