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#include "stdafx.h"
#include <stdlib.h>
#include <stdio.h>
#include <string>
struct UpdateVersion
{
int major;
int minor;
int revision;
UpdateVersion()
{
major = 0;
minor = 0;
revision = 0;
}
UpdateVersion(const UpdateVersion& item)
{
major = item.major;
minor = item.minor;
revision = item.revision;
}
UpdateVersion& operator=(const UpdateVersion& item)
{
major = item.major;
minor = item.minor;
revision = item.revision;
return *this;
}
};
UpdateVersion parseUpdateVersion(const std::string& versionStr)
{
UpdateVersion result;
if (versionStr.empty())
return result;
size_t pos1 = versionStr.find('.', 0);
size_t pos2 = versionStr.find('.', pos1 + 1);
if (pos1 == -1 || pos2 == -1 || pos2 >= versionStr.length())
return result;
result.major = atoi(versionStr.substr(0, pos1).c_str());
result.minor = atoi(versionStr.substr(pos1 + 1, pos2 - pos1).c_str());
result.revision = atoi(versionStr.substr(pos2 + 1, versionStr.length() - pos2).c_str());
return result;
}
int compareUpdateVersion(const UpdateVersion& left, const UpdateVersion& right)
{
if (left.major != right.major)
{
return left.major > right.major ? 1 : -1;
}
else if (left.minor != right.minor)
{
return left.minor > right.minor ? 1 : -1;
}
else if (left.revision != right.revision)
{
return left.revision > right.revision ? 1 : -1;
}
else
{
return 0;
}
}
int compareUpdateVersion(const std::string& left, const std::string& right)
{
UpdateVersion leftVer = parseUpdateVersion(left);
UpdateVersion rightVer = parseUpdateVersion(right);
return compareUpdateVersion(leftVer, rightVer);
}
int _tmain(int argc, _TCHAR* argv[])
{
printf("%d\n", strcmp("1.0.0", "1.0.0"));
printf("%d\n", strcmp("1.0.0", "1.0.1"));
printf("%d\n", strcmp("1.0.9", "1.0.10"));
printf("%d\n", strcmp("1.1.0", "1.0.10"));
printf("======================\n");
printf("0 == %d\n", compareUpdateVersion("1.0.0", "1.0.0"));
printf("0 == %d\n", compareUpdateVersion("2.4.3", "2.4.3"));
printf("-1 == %d\n", compareUpdateVersion("1.0.0", "1.0.1"));
printf("-1 == %d\n", compareUpdateVersion("1.0.9", "1.0.10"));
printf("-1 == %d\n", compareUpdateVersion("1.0.10", "1.1.0"));
printf("-1 == %d\n", compareUpdateVersion("1.2.10", "2.0.0"));
printf("1 == %d\n", compareUpdateVersion("1.1.0", "1.0.0"));
printf("1 == %d\n", compareUpdateVersion("1.0.10", "1.0.0"));
printf("1 == %d\n", compareUpdateVersion("1.1.0", "1.0.10"));
printf("1 == %d\n", compareUpdateVersion("100.1.0", "10.0.10"));
return 0;
}
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