104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* Main.cpp :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lfirmin <lfirmin@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/07/01 23:30:01 by lfirmin #+# #+# */
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/* Updated: 2025/07/01 23:48:50 by lfirmin ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include <string>
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#include <iostream>
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#include <fstream>
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static int open_files(std::string nameInputFile, std::string nameOutputfile,
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std::ifstream *inputFile, std::ofstream *outputFile)
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{
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(*inputFile).open(nameInputFile.c_str(), std::fstream::in);
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if (!inputFile->is_open()) // ou if (!(*inputFile))
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{
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std::cerr << "Failed to open input file!" << std::endl;
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return (1);
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}
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(*outputFile).open(nameOutputfile.c_str(), std::fstream::out);
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if (!outputFile->is_open()) // ou if (!(*outputFile))
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{
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std::cerr << "Failed to open output file!" << std::endl;
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(*inputFile).close();
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return (1);
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}
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return (0);
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}
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static void read_and_replace(char **argv, std::ifstream *inputFile, std::ofstream *outputFile)
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{
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std::string to_find;
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std::string to_replace;
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std::string line;
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std::string::size_type found;
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size_t end_last_found;
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std::string replaced_line;
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to_find = *(argv + 2);
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to_replace = *(argv + 3);
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end_last_found = 0;
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while(std::getline(*inputFile, line))
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{
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if (to_find.empty())
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{
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if (!(*inputFile).eof())
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*outputFile << line << std::endl;
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else
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*outputFile << line;
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}
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else
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{
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replaced_line.clear();
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end_last_found = 0;
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found = line.find(to_find);
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if (found != std::string::npos)
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{
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while (found != std::string::npos)
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{
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replaced_line.append(line,end_last_found,found - end_last_found);
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replaced_line += to_replace;
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end_last_found = found + to_find.length();
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found = line.find(to_find, end_last_found);
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if (found == std::string::npos)
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replaced_line.append(line, end_last_found,line.length());
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}
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}
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else
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replaced_line = line;
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if (!(*inputFile).eof())
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*outputFile << replaced_line << std::endl;
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else
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*outputFile << replaced_line;
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}
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}
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}
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int main(int argc, char **argv)
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{
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std::string nameInputFile;
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std::string nameOutputfile;
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std::ifstream inputFile;
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std::ofstream outputFile;
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if (argc != 4)
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return (std::cerr << "./sed <Filename> <S1> <S2>" << std::endl, 0);
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nameInputFile = argv[1];
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nameOutputfile = nameOutputfile + argv[1] + ".replace";
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if (open_files(nameInputFile, nameOutputfile, &inputFile, &outputFile))
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return (1);
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read_and_replace(argv, &inputFile, &outputFile);
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inputFile.close();
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outputFile.close();
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return (0);
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}
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