From 84f3429564ffa3087f75f1cd2415b76c7712469d Mon Sep 17 00:00:00 2001
From: orgin <boyce.duan@gmail.com>
Date: Mon, 8 Aug 2022 15:28:21 +0800
Subject: [PATCH] =?UTF-8?q?=E6=96=B0=E5=A2=9E=E5=8A=A0=E3=80=81=E5=87=8F?=
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---
 util/math/math.go | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/util/math/math.go b/util/math/math.go
index b1202f1..f015c74 100644
--- a/util/math/math.go
+++ b/util/math/math.go
@@ -1,5 +1,7 @@
 package math
 
+import "github.com/duanhf2012/origin/log"
+
 type NumberType interface {
 	int | int8 | int16 | int32 | int64 | float32 | float64 | uint | uint8 | uint16 | uint32 | uint64
 }
@@ -35,3 +37,42 @@ func Abs[NumType SignedNumberType](Num NumType) NumType {
 
 	return Num
 }
+
+
+func Add[NumType NumberType](number1 NumType, number2 NumType) NumType {
+	ret := number1 + number2
+	if number2> 0 && ret < number1 {
+		log.SStack("Calculation overflow , number1 is ",number1," number2 is ",number2)
+	}else if (number2<0 && ret > number1){
+		log.SStack("Calculation overflow , number1 is ",number1," number2 is ",number2)
+	}
+
+	return ret
+}
+
+func Sub[NumType NumberType](number1 NumType, number2 NumType) NumType {
+	ret := number1 - number2
+	if number2> 0 && ret > number1 {
+		log.SStack("Calculation overflow , number1 is ",number1," number2 is ",number2)
+	}else if (number2<0 && ret < number1){
+		log.SStack("Calculation overflow , number1 is ",number1," number2 is ",number2)
+	}
+
+	return ret
+}
+
+
+func Mul[NumType NumberType](number1 NumType, number2 NumType) NumType {
+	ret := number1 * number2
+	if number1 == 0 || number2 == 0 {
+		return ret
+	}
+
+	if ret / number2 == number1 {
+		return ret
+	}
+	
+	log.SStack("Calculation overflow , number1 is ",number1," number2 is ",number2)
+	return ret
+}
+