Function extractInt32LE

app/rcc/scripts/parser/js/nmea_2000.js:149–153

* Extracts a 32-bit signed integer from byte array (little-endian).

(bytes, offset)

 * Extracts a 32-bit signed integer from byte array (little-endian).
 */
function extractInt32LE(bytes, offset) {
  var value = bytes[offset] | (bytes[offset + 1] << 8) |
              (bytes[offset + 2] << 16) | (bytes[offset + 3] << 24);
  return value > 2147483647 ? value - 4294967296 : value;
}

/**
 * Extracts the PGN from a 29-bit CAN identifier.