bitChunk method
Returns an int containining bits exclusive of the last bit.
The result is left-padded with 0's.
The current int instance is treated as bits of an unknown length.
Implementation
int bitChunk(int left, int size) {
if (left < 0) {
throw RangeError.value(left, 'left', 'Out of range. Must be > 0.');
} else if (size < 1) {
throw RangeError.value(size, 'size', 'Out of range. Must be >= 1.');
} else if (left - size < -1) {
throw RangeError.value(left - size, 'left - size', 'Expected >= -1');
}
if (_usingJSNum && left > _maxSmiBits) {
return bitChunkLong(left, size);
} else {
return (this >> (left + 1 - size)) & ~(~0 << size);
}
}