readBits method Null safety
- int numBits
Read a number of bits from the input stream.
Implementation
int readBits(int numBits) {
if (numBits == 0) {
return 0;
}
if (_bitPos == 0) {
_bitPos = 8;
_bitBuffer = input.readByte();
}
var value = 0;
while (numBits > _bitPos) {
value = (value << _bitPos) + (_bitBuffer & _bitMask[_bitPos]);
numBits -= _bitPos;
_bitPos = 8;
_bitBuffer = input.readByte();
}
if (numBits > 0) {
if (_bitPos == 0) {
_bitPos = 8;
_bitBuffer = input.readByte();
}
value = (value << numBits) +
(_bitBuffer >> (_bitPos - numBits) & _bitMask[numBits]);
_bitPos -= numBits;
}
return value;
}