需求满足了，我担心的还有一个问题，那就是性能，注释掉cout输出，将while z语句调至1,000,000,重新编译跑一下：
time ./fnmatch
看来效率还不错，2.1s 进行了100W次匹配，平均2us一次，性能要求也满足了...
附：上面文章只介绍了在Linux系统下直接调用系统函数fnmatch即可实现，而没有考虑在Windows在的使用。
本人这周看了下Google-glog代码，恰巧发现了一个类似fnmatch的简单实现，因此综合起来提供了一个跨平台的接口。
#ifdef OS_WINDOWS
/* Bits set in the FLAGS argument to `fnmatch'. copy from fnmatch.h(linux) */
#define FNM_PATHNAME (1 << 0) /* No wildcard can ever match `/'. */
#define FNM_NOESCAPE (1 << 1) /* Backslashes don't quote special chars. */
#define FNM_PERIOD (1 << 2) /* Leading `.' is matched only explicitly. */
#define FNM_NOMATCH 1
#define fnmatch fnmatch_win
/**copy from Google-glog*/
bool SafeFNMatch(const char* pattern,size_t patt_len,const char* str,size_t str_len)
{
size_t p = 0;
size_t s = 0;
while (1)
{
if (p == patt_len && s == str_len)
return true;
if (p == patt_len)
return false;
if (s == str_len)
return p+1 == patt_len && pattern[p] == '*';
if (pattern[p] == str[s] || pattern[p] == '?')
{
p += 1;
s += 1;
continue;
}
if (pattern[p] == '*')
{
if (p+1 == patt_len) return true;
do
{
if (SafeFNMatch(pattern+(p+1), patt_len-(p+1), str+s, str_len-s))
{
return true;
}
s += 1;
} while (s != str_len);
return false;
}
return false;
}
}
/**注意：Windows平台下尚未实现最后一个参数flags的功能！！！*/
int fnmatch_win(const char *pattern, const char *name, int flags = 0)
{
if(SafeFNMatch(pattern,strlen(pattern),name,strlen(name)))
return 0;
else
return FNM_NOMATCH;
}
#else
#include <fnmatch.h>
#endif
int main()
{
const char* orgin_str = "sina|weibo|pusher";
char pattern_arr[][20] = {
{"sina|*|pusher"},
{"sina|*|*"},
{"*|weibo|*"},
//不能被匹配的
{"sina|pic|*"},
{"*|*|sign"},
{"*|weibo|sign"},
{"*|pic|sign"},
{"sina|pic|sign"},
{"*|*|*"}
};
static int pattern_arr_size = sizeof(pattern_arr) / sizeof(pattern_arr[0]);
vector<char *> vec_str;
for(int i = 0; i < pattern_arr_size; i ++)
{
vec_str.push_back(pattern_arr[i]);
}
std::cout << "Origin Str: " << orgin_str << "nn";
int ret;
for(int i = 0; i < vec_str.size(); i++)
{
ret = fnmatch(vec_str.at(i), orgin_str, FNM_PATHNAME);
if(ret == FNM_NOMATCH)
{
cout<<"sorry, I'm failed: ["<< vec_str.at(i) <<"]n";
}
else
{
cout<<"OK, I'm success: ["<< vec_str.at(i) <<"]n";
}
}
return 0;
}
