C++版本号处理3 - 版本号比较

1. 关键词
2. verutil.h
3. verutil.cpp
4. 测试代码
5. 运行结果
6. 源码地址

1. 关键词

关键词：

C++ 版本号处理版本号比较跨平台

实现原理：

通过字符串分割，对每一段的版本号进行逐一比较。

应用场景：

要基于版本号做一些逻辑区分时，比如：要大于某个特定的版本才支持某个功能。

2. verutil.h

#pragma once#include <string>namespace cutl
{/*** @brief Compare two version strings.** @param v1 version string 1.* @param v2 version string 2.* @return int The result of the comparison. -1 if v1 < v2, 0 if v1 == v2, 1 if v1 > v2.*/int compare_version(const std::string &v1, const std::string &v2);
} // namespace cutl

3. verutil.cpp

#include <regex>
#include "verutil.h"
#include "strutil.h"
#include "inner/logger.h"namespace cutl
{int compare_version(const std::string &v1, const std::string &v2){auto arr1 = split(v1, ".");auto arr2 = split(v2, ".");int len1 = arr1.size();int len2 = arr2.size();int len = std::max(len1, len2);for (int i = 0; i < len; i++){int num1 = i < len1 ? std::stoi(arr1[i]) : 0;int num2 = i < len2 ? std::stoi(arr2[i]) : 0;if (num1 < num2){return -1;}else if (num1 > num2){return 1;}}return 0;}
} // namespace cutl

4. 测试代码

#include "common.hpp"
#include "verutil.h"void TestCompareVersion()
{PrintSubTitle("TestCompareVersion");auto version1 = "3.28.3";auto version2 = "3.2.2";auto version3 = "3.30.0";auto adjective = [](int ret){ return ret > 0 ? " greater than " : (ret < 0 ? " less than " : " equal to "); };auto ret1 = cutl::compare_version(version1, version2);std::cout << version1 << adjective(ret1) << version2 << std::endl;auto ret2 = cutl::compare_version(version1, version3);std::cout << version1 << adjective(ret2) << version3 << std::endl;
}

5. 运行结果

-----------------------------------------TestCompareVersion-----------------------------------------
3.28.3 greater than 3.2.2
3.28.3 less than 3.30.0