/**
* Parse escape sequences in a string to their actual byte values.
* Handles: \n, \r, \t, \xNN (hex), \uNNNN (unicode), \\
*/
export function parseEscapeSequences(input: string): string {
return input.replace(/\\(x[0-9A-Fa-f]{2}|u[0-9A-Fa-f]{4}|[nrt\\])/g, (match, seq: string) => {
if (seq.startsWith("x")) {
return String.fromCharCode(parseInt(seq.slice(1), 16));
}
if (seq.startsWith("u")) {
return String.fromCharCode(parseInt(seq.slice(1), 16));
}
switch (seq) {
case "n": return "\n";
case "r": return "\r";
case "t": return "\t";
case "\\": return "\\";
default: return match;
}
});
}
/**
* Extract commands from PTY input data.
* Filters out control sequences like ^C and ^D.
*/
export function extractCommands(data: string): string[] {
const commands: string[] = [];
const lines = data.split(/[\n\r]+/);
for (const line of lines) {
const trimmed = line.trim();
if (trimmed && !trimmed.startsWith("\x03") && !trimmed.startsWith("\x04")) {
commands.push(trimmed);
}
}
return commands;
}
/**
* Parse a command line into command and arguments.
*/
export function parseCommand(commandLine: string): { command: string; args: string[] } {
const parts = commandLine.split(/\s+/).filter(Boolean);
const command = parts[0] ?? "";
const args = parts.slice(1);
return { command, args };
}
