private async Task TranslateInnerAsync(BasicProgram program)
{
while (true)
{
string line = await this.reader.ReadLineAsync();
if (line == null)
{
return;
}
string[] numberAndStatement = line.Split(new char[] { ' ' }, 2);
int lineNumber = int.Parse(numberAndStatement[0]);
string[] keywordAndRest = numberAndStatement[1].Split(new char[] { ' ' }, 2);
switch (keywordAndRest[0])
{
case "REM":
program.AddComment(lineNumber, keywordAndRest[1]);
break;
case "PRINT":
program.AddPrint(lineNumber, keywordAndRest[1].Substring(1, keywordAndRest[1].Length - 2));
break;
default:
program.AddGoto(lineNumber, int.Parse(keywordAndRest[1]));
break;
}
}
}
private static async Task MainAsync(string inputPath, string outputPath)
{
string name = Path.GetFileNameWithoutExtension(inputPath);
using (Stream output = Open(outputPath, FileMode.Create, FileAccess.Write, FileShare.None))
{
Stream input = Open(inputPath, FileMode.Open, FileAccess.Read, FileShare.Read);
await BasicProgram.TranslateAsync(name, input, output);
}
}
public async Task TranslateAsync(string name, Stream output)
{
BasicProgram program = new BasicProgram(name);
await this.TranslateInnerAsync(program);
string outputCode = program.ToString();
byte[] rawOutput = Encoding.UTF8.GetBytes(outputCode.ToString());
await output.WriteAsync(rawOutput, 0, rawOutput.Length);
}