validateHeader static method

bool validateHeader(
  1. Uint8List patch,
  2. PatchFormat format
)

Validates that a patch file has a valid header for the specified format.

patch is the patch data. format is the expected patch format.

Returns true if the header is valid, false otherwise.

Implementation

static bool validateHeader(Uint8List patch, PatchFormat format) {
  if (patch.length < 4) {
    return false;
  }

  final signature = format.signature;
  if (patch.length < signature.length) {
    return false;
  }

  for (int i = 0; i < signature.length; i++) {
    if (patch[i] != signature[i]) {
      return false;
    }
  }

  return true;
}