readFromBufferAsString function

String readFromBufferAsString(Pointer<Uint8> buffer, int offset, [ int? byteCnt, bool allowMalformed = true, ])

Read a specified piece of the buffer and convert it to a string, interpreting the bytes as UTF-8.

If byteCnt is not specified, it gets auto-calculated by looking for the null terminator at position offset or later in the buffer. allowMalformed is passed directly to utf8.decode, allowing or not an invalid UTF-8 sequence to occur in the buffer.

Implementation

String readFromBufferAsString(Pointer<Uint8> buffer, int offset,
    [int? byteCnt, bool allowMalformed = true]) {
  if (byteCnt == null) {
    // auto-detect the end of string
    int c = 0;
    while (buffer[offset + c++] != 0) {}
    byteCnt = c;
  }
  List<int> codeUnits = Pointer<Uint8>.fromAddress(buffer.address + offset)
      .asTypedList(byteCnt)
      .takeWhile((value) => value != 0)
      .toList();
  return utf8.decode(codeUnits, allowMalformed: allowMalformed);
}