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我正在尝试向包含日期信息的事件结构重复添加一周。我这样做是为了在某个时间之前创建一个事件的多个实例。我的 mktime 函数出现段错误,其中 full_time = mktime(&caltime); 我不知道为什么。

void multiple(icalevent event, int is_location){
    icalevent temp;
    int rrule_bound = atoi(event.rrule);
    int rtime_bound = atoi(event.rtime);
    int start_bound = atoi(event.start);
    int stime_bound = atoi(event.stime);
    char buffer[9];
    struct tm caltime;
    time_t full_time;
    char time_str[15];

    temp = cpystruct(event, is_location); 
    while((start_bound <= rrule_bound) && (stime_bound <= rtime_bound)){
        memset(&caltime, 0, sizeof(struct tm));
        strncpy(time_str, temp.start, 9);
        strncat(time_str, temp.stime, 6);

        strptime(time_str, "%Y%m%d%H%M%S", &caltime);
        caltime.tm_mday += 7;
        full_time = mktime(&caltime);
        if(caltime.tm_isdst == 1){
            caltime.tm_hour -= 1;
        }
        full_time = mktime(&caltime);

        strftime(buffer, 9, "%Y%m%d", &caltime);
        start_bound = atoi(buffer);
        strncpy(temp.end, buffer, 8);
        strncpy(temp.start, buffer, 8);

        if((start_bound <= rrule_bound) && (stime_bound <= rtime_bound)){
            /*create a sort string*/

            calendar[percent_full] = cpystruct(temp, is_location);
            printst(calendar[percent_full]);
            percent_full++;
        }
        else{
            break;
        }

    }

    return;
    }

icalevent结构:

    typedef struct{
        char start[9]; /*"YYYYMMDD*/
        char stime[7]; /*"HHMMSS"*/
        char end[9]; /*"YYYYMMDD"*/
        char etime[7]; /*"HHMMSS"*/
        char rrule[9]; /*"YYYYMMDD"*/
        char rtime[7]; /*"HHMMSS"*/
        char *location; /*"2343 fake street"*/
        char *summary; /*"Halloween party"*/
        char *sort_str; /*"YYYYMMDDHHMMSSHalloween party*/
     } icalevent

编辑

icalevent cpystruct(icalevent temp, int is_location) {
    icalevent perm;
    strncpy(perm.start, temp.start, 9);
    strncpy(perm.stime, temp.stime, 7);
    strncpy(perm.end, temp.end, 9);
    strncpy(perm.etime, temp.etime, 7);
    strncpy(perm.rrule, temp.rrule, 9);
    strncpy(perm.rtime, temp.rtime, 7);
    if(is_location) {
        perm.location = strdup(temp.location);
    } else {
        perm.location = NULL;
    }

    perm.summary = strdup(temp.summary);
    perm.sort_str = strdup(temp.sort_str);
    return perm;
}
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1 回答 1

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最有可能的是,您的问题不是mktime,而是您的副本语句之一。第一个是

strncat(time_str, temp.stime, 6);

time_str可能不是 NUL 终止的。

同样在这里

strncpy(temp.end, buffer, 8);
strncpy(temp.start, buffer, 8);

temp.end并且temp.start可能在之前被 NUL 终止,但你不能确定。改用就好strcpy了。

下一个是

calendar[percent_full] = cpystruct(temp, is_location);
printst(calendar[percent_full]);
percent_full++;

我看不到结尾的检查calendar。因此,可能会有超出日历末尾的写入。

顺便说一句,当你这样做时

if(caltime.tm_isdst == 1){
    caltime.tm_hour -= 1;
}

tm_hour可能变成负数。

于 2012-12-02T22:17:02.953 回答