正则表达式匹配

class Solution {
public:
    bool match(char* str, char* pattern)
    {
        if (str == nullptr || pattern == nullptr) {
            return false;
        }
        
        if (*str == ‘\0‘ && *pattern == ‘\0‘) {
            return true;
        }
        
           if (*pattern == ‘\0‘) {
            return false;
        }
        
        if ( *(pattern + 1) == ‘*‘) {
             if (*pattern == *str || (*pattern == ‘.‘ && *str != ‘\0‘)) {
                return match(str + 1, pattern) ||                        match(str, pattern + 2) ||                        match(str + 1, pattern + 2);
            } else {
                return match(str, pattern + 2);
            }
        }
        
        if (*pattern == *str || (*pattern == ‘.‘ && (*str) != ‘\0‘)) {
            return match(str + 1, pattern + 1);
        }
        
        return false;
    }
};