redis - C: string to milisecs timestamp -

i want return in function time_t value timestamp in string format don't it. need help.

i read string key of redis database timestamp value form, example, "1456242904.226683"

my code is:

time_t get_ts(rediscontext *ctx) {     redisreply *reply;     reply = rediscommand(ctx, "get %s", "key");     if(reply == null){         return -1;     }      char error[255];     sprintf(error, "%s", "get_ts 2:",reply->str);     send_log(error);      freereplyobject(reply);      return reply->str; } 

reply->str string value need return time_t value.

how can it?

thanks

i assume 1456242904.226683 seconds past since 00:00, jan 1 1970. 46 years. 1456242904.226683 floating point value , time_t integral data type. can't convert 1456242904.226683 time_t exactly, can convert 1456242904. first use atof convert string floting point value, cast floating point value time_t:

#include <stdlib.h>     // atof  time_t get_ts(rediscontext *ctx) {     redisreply *reply;     reply = rediscommand(ctx, "get %s", "key");     if(reply == null){         return -1;     }      char error[255];     sprintf(error, "%s", "get_ts 2:",reply->str);     send_log(error);      time_t t = (time_t)atof(reply->str);              // ^^^^^^ ^^^^      freereplyobject(reply);      return t; }