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package no.eliashaugsbakk.kompilator;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.nio.file.Path;
public class Main {
public static final String programFileExtension = "spå";
private record InputProgram(String programName, String programContent) {}
static void main(String[] args) {
if (args.length != 1) {
IO.println("Only accepts one argument: The filename of the input program");
System.exit(1);
}
InputProgram inputProgram = readInputProgram(args[0]);
/*
String IR = createIR(inputFile);
String assembly = createAssembly(IR);
*/
assemblingAndLInking(inputProgram);
System.exit(0);
}
private static void assemblingAndLInking(InputProgram inputProgram) {
String assemblyFileName = inputProgram.programName + ".s";
String assembledFileName = inputProgram.programContent + ".o";
try {
FileWriter fw = new FileWriter(assemblyFileName);
fw.write(inputProgram.programContent);
fw.close();
} catch (IOException e) {
IO.println("Could not write file: " + e.getMessage());
}
try {
// Assembling using: as -o program.o program.s
ProcessBuilder asPB = new ProcessBuilder("as", "-o", assembledFileName, assemblyFileName);
runProcess(asPB);
} catch (IOException e) {
IO.println("Failed to invoke GCC\n\n" + e);
} catch (InterruptedException e) {
IO.println("Failed to wait for gcc output\n\n" + e);
}
try {
// Linking using GNU linker: ld -o program program.o
ProcessBuilder ldPB = new ProcessBuilder("ld", "-o", inputProgram.programName, assembledFileName);
runProcess(ldPB);
} catch (IOException e) {
IO.println("Failed to invoke GCC\n\n" + e);
} catch (InterruptedException e) {
IO.println("Failed to wait for gcc output\n\n" + e);
}
// Clean up
try {
Files.delete(Path.of(assemblyFileName));
} catch (IOException e) {
IO.println("Could not delete assembly file: " + e.getMessage());
}
try {
Files.delete(Path.of(assembledFileName));
} catch (IOException e) {
IO.println("Could not delete assembled file: " + e.getMessage());
}
}
private static void runProcess(ProcessBuilder processBuilder) throws IOException, InterruptedException {
Process process = processBuilder.start();
process.waitFor();
if (process.exitValue() != 0) {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
String line;
while ((line = bufferedReader.readLine()) != null) {
System.out.println(line);
}
bufferedReader.close();
}
}
private static InputProgram readInputProgram(String inputFilePath) {
IO.println("Input file path: " + inputFilePath);
if (!inputFilePath.endsWith("." + programFileExtension)) {
IO.println("Input file must use the file extension: " + programFileExtension);
System.exit(1);
}
String programName = inputFilePath.substring(
inputFilePath.lastIndexOf("/") + 1,
inputFilePath.lastIndexOf("."));
IO.println("Program name: " + programName);
String programContent = null;
try(BufferedReader br = new BufferedReader(new FileReader(inputFilePath))) {
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append(System.lineSeparator());
line = br.readLine();
}
programContent = sb.toString();
} catch (FileNotFoundException e) {
IO.println("File not found");
} catch (IOException e) {
IO.println(e.getMessage());
}
if (programContent == null) {
IO.println("Could not read input file");
System.exit(1);
}
return new InputProgram(programName, programContent);
}
}
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