c posix 正则表达式验证输入 HH :MM:SS time string

Question

与Regex pattern for HH:MM:SS time string相关我正在尝试验证用户时间输入。

int main(int argc, char *argv[]){
        regex_t regex;
        int reti;
        char msgbuf[100];
        char inputStr2[100]="12:34:04";
        char inputStr[100]="12:34";

/* Compile regular expression */
        reti = regcomp(&regex, "^((([01]?[0-9]|2[0-3]):)?([0-5]?[0-9]):)?([0-5]?[0-9])$", 0);
        if( reti ){
        fprintf(stderr, "Could not compile regex\n");
        }

/* Execute regular expression */
           printf("%s is the string\n",inputStr);
        reti = regexec(&regex, inputStr, 0, NULL, 0);
        if( !reti ){
                puts("Match");
        }
        else if( reti == REG_NOMATCH ){
                puts("No match");
        }
        else{
                regerror(reti, &regex, msgbuf, sizeof(msgbuf));
                fprintf(stderr, "Regex match failed: %s\n", msgbuf);
        }
         printf("%s is the string\n",inputStr2);
        reti = regexec(&regex, inputStr2, 0, NULL, 0);
        if( !reti ){
                puts("Match");
        }
        else if( reti == REG_NOMATCH ){
                puts("No match");
        }
        else{
                regerror(reti, &regex, msgbuf, sizeof(msgbuf));
                fprintf(stderr, "Regex match failed: %s\n", msgbuf);
        }
/* Free compiled regular expression if you want to use the regex_t again */
    regfree(&regex);

        return 0;
}

1. 我收到错误未知转义序列 '\d'。

这里有什么问题吗？这是验证用户时间输入的最佳方式吗？编辑:尝试使用 "^(?:(?:([01]?\\d|2[0-3]):)?([0-5]?\\d):)?([0- 5]?\\d)$" 和我没有匹配。还有

Answer 1

例如，您可以尝试 strptime()

struct tm t;
char p;

p = strptime(inputStr, "%H:%M:%S", &t);

if (p == NULL || *p != '\0') {
    abort();
}