41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
#include <algorithm>
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#include <format>
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#include <iostream>
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// From https://stackoverflow.com/questions/865668
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bool cmdOptionExists(char** begin, char** end, const std::string& option) {
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return std::find(begin, end, option) != end;
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}
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int main (int argc, char* argv[]) {
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const std::string stdflag = "-";
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std::string infile = stdflag;
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std::string outfile = "";
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bool showHelp = false;
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if (cmdOptionExists(argv, argv+argc, "-h")) showHelp = true;
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else if (cmdOptionExists(argv, argv+argc, "--help")) showHelp = true;
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else switch (argc) {
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case 3: outfile = argv[2]; /* DROP */
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case 2: infile = argv[1]; /* DROP */
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case 1: break;
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default: showHelp = true;
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}
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if (showHelp) {
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std::cerr << R"(
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Usage: cpm [infile [outfile]]
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If infile is not specified or is '-', stdin is used.
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If outfile is '-' or unspecified and infile is stdin, stdout is used.
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Otherwise if outfile is unspecified, the name of the infile with its
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final '.' extension (if any) removed and '.cxx' added is used.
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)";
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return 1;
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}
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if (outfile.length() == 0) {
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if (infile == stdflag) outfile = stdflag;
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else outfile = infile.substr(0, infile.rfind('.')) + ".cxx";
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}
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std::cout << std::format("Transforming from {} to {}.\n", infile, outfile);
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}
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