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gnuplot.h
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94 lines (79 loc) · 2.31 KB
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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* URL: https://github.com/martinruenz/gnuplot-cpp
* AUTHOR: Martin Rünz, 2015
* Modifications: Lennart Steffen, 2022
*/
#pragma once
#include <stdio.h>
#include <string>
#include <vector>
#include <iostream>
#include <fstream>
#include <stdexcept>
class GnuplotPipe {
public:
GnuplotPipe() = default;
GnuplotPipe(GnuplotPipe&&) = default;
GnuplotPipe& operator=(GnuplotPipe&&) = default;
bool isOpen() const { return pipe != nullptr; }
void open(bool persist = true) {
if ( isOpen() )
return;
pipe = popen(persist ? "gnuplot -persist" : "gnuplot", "w");
if (!pipe)
throw std::runtime_error("Failed to open gnuplot pipe!");
}
inline virtual ~GnuplotPipe(){
if (pipe) pclose(pipe);
}
void sendLine(const std::string& text, bool useBuffer = false){
throwIfNotOpen();
if (useBuffer)
buffer.push_back(text + "\n");
else
fputs((text + "\n").c_str(), pipe);
}
void flush(){
throwIfNotOpen();
fflush(pipe);
}
void sendEndOfData(unsigned repeatBuffer = 1){
throwIfNotOpen();
for (unsigned i = 0; i < repeatBuffer; i++) {
for (auto& line : buffer) fputs(line.c_str(), pipe);
fputs("e\n", pipe);
}
fflush(pipe);
buffer.clear();
}
void sendNewDataBlock(){
sendLine("\n", !buffer.empty());
}
void writeBufferToFile(const std::string& fileName){
std::ofstream fileOut(fileName);
for (auto& line : buffer) fileOut << line;
fileOut.close();
}
private:
GnuplotPipe(GnuplotPipe const&) = delete;
GnuplotPipe& operator=(GnuplotPipe const&) = delete;
void throwIfNotOpen() const {
if (!pipe)
throw std::runtime_error("Gnuplot pipe is not open!");
}
FILE* pipe {nullptr};
std::vector<std::string> buffer;
};