feat(calc_lib): decimal 初始化

calc_lib/CMakeLists.txt

@@ -6,7 +6,7 @@ project(khl_calc VERSION 1.0.0 LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-set(CMAKE_CONFIGURATION_TYPES Debug)
+# set(CMAKE_CONFIGURATION_TYPES Debug)
 
 # 设置 cmake 脚本目录
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)

calc_lib/include/khl_calc/khl_calc.h

 #ifndef  _KHL_CALC_H_
 #define  _KHL_CALC_H_
 
+#include "khl_calc/khl_calc_exception.hpp"
 #include "khl_calc/khl_calc_decimal.h"
 
 // C/C++ 跨平台时预处理判断平台环境

calc_lib/include/khl_calc/khl_calc_decimal.h

@@ -60,6 +60,9 @@ public:
     Decimal &operator=(Decimal &val);
     ~Decimal();
 
+private:
+    void init(std::string val);
+
 public:
     /**
      * @brief 返回 Decimal 的小数位数
@@ -140,7 +143,7 @@ private:
     /**
      * @brief 字符串形式的 Decimal 值
      */
-    std::string val;
+    std::string _val;
 };
 KHL_CALC_NAMESPACE_END
-#endif // _KHL_CALC_DECIMAL_H_
\ No newline at end of file
+#endif // _KHL_CALC_DECIMAL_H_

calc_lib/include/khl_calc/khl_calc_exception.hpp

+/**
+ * @file khl_calc_exception.hpp
+ * @brief 异常体系
+ */
+
+#ifndef _KHL_CALC_EXCEPTION_H_
+#define _KHL_CALC_EXCEPTION_H_
+
+#include <string>
+
+#include "khl_calc_common.h"
+
+KHL_CALC_NAMESPACE_BEGIN
+
+/**
+ * @brief Calc 库的异常基类
+ */
+class DllExport CalcException
+{
+public:
+    CalcException(std::string msg) : _msg(msg)
+    {
+    }
+
+protected:
+    /**
+     * 异常信息. 由 msg() 返回
+     */
+    std::string _msg;
+
+public:
+    std::string msg()
+    {
+        return _msg;
+    }
+};
+
+/**
+ * @brief Decimal 异常基类
+ */
+class DllExport CalcDecimalException : public CalcException
+{
+public:
+    CalcDecimalException(std::string msg) : CalcException(msg)
+    {
+    }
+};
+
+/**
+ * @brief Decimal 初始化异常.
+ * 抛出次异常原因通常是 Decimal(std::string) 的入参非法, 例如空字符串、 或者字符串不能表示为数字, 例如: new Decimal("1.1.1")
+ */
+class DllExport CalcDecimalInitException : public CalcDecimalException
+{
+public:
+    CalcDecimalInitException(std::string msg) : CalcDecimalException(msg)
+    {
+    }
+};
+KHL_CALC_NAMESPACE_END
+#endif // _KHL_CALC_EXCEPTION_H_

calc_lib/src/khl_calc/khl_calc_decimal.cpp

 #include <iostream>
 #include <memory>
 #include <algorithm>
+#include "khl_calc/khl_calc_exception.hpp"
 #include "khl_calc/khl_calc_decimal.h"
 
 KHL_CALC_NAMESPACE_BEGIN
 
 Decimal::Decimal(int val)
 {
+    init(std::to_string(val));
 }
 Decimal::Decimal(std::string val)
 {
+    // 输入字符串不能为空
+    if( val.empty())
+    {
+        throw CalcDecimalInitException("Init error: input string can't be empty string.");
+    }
+
+    // 输入字符串必须为合法的数字
+    auto chars = val.c_str();
+    
+
+    init(val);
 }
 Decimal::Decimal(long val)
 {
+    init(std::to_string(val));
 }
 
 Decimal::Decimal(Decimal &val)
@@ -28,9 +42,15 @@ Decimal::~Decimal()
 {
 }
 
+void Decimal::init(std::string val)
+{
+    _val = val;
+    _scale = 0;
+}
+
 int Decimal::scale()
 {
-    return 0;
+    return _scale;
 }
 
 int Decimal::compareTo(Decimal val)

calc_lib/test/testmain.cpp

@@ -10,47 +10,15 @@
 
 #include "khl_calc/khl_calc.h"
 
-TEST_CASE("test_add")
+TEST_CASE("test_init")
 {
-    spdlog::info("test add");
-    auto decimal = std::make_unique<khl::calc::Decimal>();
-    for (int i = 0; i < 10; i++)
+    spdlog::info("test init");
+    try
     {
-        std::cout << decimal->add("465465465464", "1321654876135138468135135") << std::endl;
-        std::cout << "===================" << std::endl;
+        auto decimal = std::make_unique<khl::calc::Decimal>("");
+    }
+    catch(khl::calc::CalcDecimalInitException e)
+    {
+        std::cerr << e.msg() << std::endl;;
     }
 }
-
-TEST_CASE("test_substract")
-{
-    spdlog::info("test substract");
-    auto decimal = std::make_unique<khl::calc::Decimal>();
-
-    // std::cout << decimal->substract("0", "0") << std::endl;
-    // std::cout << decimal->substract("0", "1") << std::endl;
-    // std::cout << decimal->substract("1", "0") << std::endl;
-    std::cout << decimal->substract("123", "123") << std::endl;
-    // std::cout << decimal->substract("123", "4567") << std::endl;
-    // std::cout << decimal->substract("4567", "123") << std::endl;
-    // std::cout << decimal->substract("684651316546", "46513516846165") << std::endl;
-}
-
-TEST_CASE("test_multiply")
-{
-    spdlog::info("test multiply");
-    auto decimal = std::make_unique<khl::calc::Decimal>();
-
-    std::cout << decimal->multiply("9133", "0") << std::endl;
-}
-
-TEST_CASE("test_divide")
-{
-    spdlog::info("test divide");
-    auto decimal = std::make_unique<khl::calc::Decimal>();
-
-    // std::cout << decimal->divide("10", "5") << std::endl;
-    // std::cout << decimal->divide("531518", "123") << std::endl;
-    std::cout << decimal->divide("222", "2") << std::endl;
-
-}
-