Function strFind

stringlib.go:90–134

(L *LState)

}

func strFind(L *LState) int {
	str := L.CheckString(1)
	pattern := L.CheckString(2)
	if len(pattern) == 0 {
		L.Push(LNumber(1))
		L.Push(LNumber(0))
		return 2
	}
	init := luaIndex2StringIndex(str, L.OptInt(3, 1), true)
	plain := false
	if L.GetTop() == 4 {
		plain = LVAsBool(L.Get(4))
	}

	if plain {
		pos := strings.Index(str[init:], pattern)
		if pos < 0 {
			L.Push(LNil)
			return 1
		}
		L.Push(LNumber(init+pos) + 1)
		L.Push(LNumber(init + pos + len(pattern)))
		return 2
	}

	mds, err := pm.Find(pattern, unsafeFastStringToReadOnlyBytes(str), init, 1)
	if err != nil {
		L.RaiseError(err.Error())
	}
	if len(mds) == 0 {
		L.Push(LNil)
		return 1
	}
	md := mds[0]
	L.Push(LNumber(md.Capture(0) + 1))
	L.Push(LNumber(md.Capture(1)))
	for i := 2; i < md.CaptureLength(); i += 2 {
		if md.IsPosCapture(i) {
			L.Push(LNumber(md.Capture(i)))
		} else {
			L.Push(LString(str[md.Capture(i):md.Capture(i+1)]))
		}
	}
	return md.CaptureLength()/2 + 1
}

func strFormat(L *LState) int {
	str := L.CheckString(1)