Function extractInt32BE

app/rcc/scripts/parser/js/sirf_binary.js:137–141

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

(bytes, offset)

 * Extracts a 32-bit signed integer from byte array (big-endian).
 */
function extractInt32BE(bytes, offset) {
  var value = (bytes[offset] << 24) | (bytes[offset + 1] << 16) |
              (bytes[offset + 2] << 8) | bytes[offset + 3];
  return value > 2147483647 ? value - 4294967296 : value;
}

/**
 * Validates SiRF checksum.