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Posted on 2008-03-28 10:16 王大头 阅读(221) 评论(0) 编辑 收藏 引用
 int clock_getres(clockid_t, struct timespec *);
int clock_gettime(clockid_t, struct timespec *);
int clock_settime(clockid_t, const struct timespec *);
char *ctime(const time_t *);
char *ctime_r(const time_t *, char *);
double difftime(time_t, time_t);
struct tm *getdate(const char *);
struct tm *gmtime(const time_t *);
struct tm *gmtime_r(const time_t *, struct tm *);
struct tm *localtime(const time_t *);
struct tm *localtime_r(const time_t *, struct tm *);
time_t mktime(struct tm *);
int nanosleep(const struct timespec *, struct timespec *);
size_t strftime(char *, size_t, const char *, const struct tm *);
char *strptime(const char *, const char *, struct tm *);
time_t time(time_t *);
int timer_create(clockid_t, struct sigevent *, timer_t *);
int timer_delete(timer_t);
int timer_gettime(timer_t, struct itimerspec *);
int timer_getoverrun(timer_t);
int timer_settime(timer_t, int, const struct itimerspec *,
struct itimerspec *);
void tzset(void);
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/errno.h>
#include <time.h>
struct time_str
{
char tm_year[5];
char tm_mon[3];
char tm_day[3];
char tm_hour[3];
char tm_min[3];
char tm_sec[3];
};
int main(argc,argv)
int argc;
char* argv[];
{
char time_arg[15];
char str[100];
time_t time_curr;
char *time_char;
struct tm tmp_tm;
struct tm *ttt_tm;
struct time_str tm_str;
if(argc!=2) {
fprintf(stderr,"Usage : %s time(YYYYMMDDHH24MISS) .\n",argv[0]);
exit(1);
}
memset(time_arg,0,sizeof(time_arg));
memset(&tm_str,0,sizeof(tm_str));
strncpy(time_arg,argv[1],14);
/* struct tm */
tmp_tm.tm_year =substr2i(time_arg,1,4)-1900;
tmp_tm.tm_mon =substr2i(time_arg,5,2)-1;
tmp_tm.tm_mday =substr2i(time_arg,7,2);
tmp_tm.tm_hour =substr2i(time_arg,9,2);
tmp_tm.tm_min =substr2i(time_arg,11,2);
tmp_tm.tm_sec =substr2i(time_arg,13,2);
if(tmp_tm.tm_min>5) {
tmp_tm.tm_hour++;
tmp_tm.tm_min=0;
tmp_tm.tm_sec=0;
if(mktime(&tmp_tm)==-1) {
fprintf(stderr,"mktime error :%s.\n",strerror(errno));
}
}
printf("convert date to :%04d%02d%02d%02d%02d%02d.\n",tmp_tm.tm_year+1900,tmp_tm.tm_mon+1,tmp_tm.tm_mday,tmp_tm.tm_hour,tmp_tm.tm_min,tmp_tm.tm_sec);
/* time and ctime */
if((time_curr=time(NULL))==-1) {
fprintf(stderr,"time error :%s.\n",strerror(errno));
exit(1);
}
if((time_char=ctime(&time_curr))==NULL) {
fprintf(stderr,"ctime error :%s.\n",strerror(errno));
exit(1);
}
printf("current time is :%s",time_char);
/* localtime and asctime */
if((ttt_tm=localtime(&time_curr))==NULL) {
fprintf(stderr,"localtime error :%s.\n",strerror(errno));
exit(1);
}
if((time_char=asctime(ttt_tm))==NULL) {
fprintf(stderr,"asctime error :%s.\n",strerror(errno));
exit(1);
}
printf("current time is :%s",time_char);
/* strftime */
memset(str,0,sizeof(str));
strftime(str,100,"%Y%m%d%H%M%S",ttt_tm);
printf("current time is :%s.\n",str);
return(0);
}
int substr2i(str,pos,len)
char str[];
int pos;
int len;
{
char tmp[20];
memset(tmp,0,sizeof(tmp));
strncpy(tmp,&str[(pos-1)],len);
return(atoi(tmp));
}
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