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。
#pragma once
#include
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
#include
#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
#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;
}
-----------------------------------------TestCompareVersion-----------------------------------------
3.28.3 greater than 3.2.2
3.28.3 less than 3.30.0
更多详细代码,请查看本人写的C++ 通用工具库: common_util, 本项目已开源,代码简洁,且有详细的文档和Demo。
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