Function strByte

stringlib.go:43–73

(L *LState)

}

func strByte(L *LState) int {
	str := L.CheckString(1)
	start := L.OptInt(2, 1) - 1
	end := L.OptInt(3, -1)
	l := len(str)
	if start < 0 {
		start = l + start + 1
	}
	if end < 0 {
		end = l + end + 1
	}

	if L.GetTop() == 2 {
		if start < 0 || start >= l {
			return 0
		}
		L.Push(LNumber(str[start]))
		return 1
	}

	start = intMax(start, 0)
	end = intMin(end, l)
	if end < 0 || end <= start || start >= l {
		return 0
	}

	for i := start; i < end; i++ {
		L.Push(LNumber(str[i]))
	}
	return end - start
}

func strChar(L *LState) int {
	top := L.GetTop()