func()

in packed.go [69:93]

• 21 lines of code
• 4 McCabe index (conditional complexity)

func (p *packed) Set(ix uint64, val uint64) {
	if val&p.forbiddenMask != 0 {
		panic(fmt.Sprintf("attempt to store out of range value.  numeric overflow: %x (%x)", (val & p.forbiddenMask), val))
	}
	bitstart := ix * uint64(p.bits)
	word := bitstart / 64
	bitoff := bitstart % 64
	getbits := 64 - (bitoff)
	if getbits > uint64(p.bits) {
		getbits = uint64(p.bits)
	}
	// zero
	p.space[word] =
		((p.space[word] >> (bitoff + getbits)) << (bitoff + getbits)) |
			(p.space[word] << (64 - bitoff) >> (64 - bitoff))

	// or in val
	p.space[word] |= (val << bitoff)

	if uint(getbits) < p.bits {
		remainder := p.bits - uint(getbits)
		p.space[word+1] = ((p.space[word+1] >> remainder) << remainder) | val>>getbits
	}
	return
}