Function findCSI

cli/unstable_get_cursor.ts:50–67

(
  buffer: Uint8Array,
)

}

function findCSI(
  buffer: Uint8Array,
): { parameters: Uint8Array; intermediates: Uint8Array; final: number } | null {
  for (let i = 0; i < buffer.length - 1; ++i) {
    if (buffer[i] === 0x1b && buffer[i + 1] === 0x5b) {
      i += 2;
      const parameters = getRange(buffer.subarray(i), 0x30, 0x3f);
      i += parameters.length;
      const intermediates = getRange(buffer.subarray(i), 0x20, 0x2f);
      i += intermediates.length;
      const final = buffer[i];
      if (final != undefined && 0x40 <= final && final <= 0x7e) {
        return { parameters, intermediates, final };
      }
    }
  }
  return null;
}

function getRange(buffer: Uint8Array, min: number, max: number) {
  let i = 0;