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/*
* Copyright (C) 2021 P. J. McDermott
*
* This file is part of @
*
* @ is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* @ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with @. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "datetime.h"
static char *
_concat_args(int argc, const char *argv[])
{
int buf_l;
int i;
char *buf;
int buf_i;
int j;
buf_l = 0;
for (i = 0; i < argc; ++i) {
buf_l += strlen(argv[i]) + 1;
}
buf = calloc(buf_l, sizeof(*buf));
if (buf == NULL) {
fprintf(stderr, "Failed to allocate buffer: %s\n",
strerror(errno));
return NULL;
}
buf_i = 0;
for (i = 0; i < argc; ++i) {
for (j = 0; argv[i][j] != '\0'; ++j) {
buf[buf_i++] = argv[i][j];
}
buf[buf_i++] = ' ';
}
buf[--buf_i] = '\0';
return buf;
}
int
main(int argc, const char *argv[])
{
char *buf;
time_t arg;
time_t now;
time_t dif;
buf = _concat_args(argc - 1, argv + 1);
if (buf == NULL) {
return EXIT_FAILURE;
}
if (datetime_parse(buf, &arg) < 0) {
free(buf);
return EXIT_FAILURE;
}
free(buf);
time(&now);
dif = arg - now;
if (dif >= 1000 * 24 * 60 * 60) {
fputs("Date too far in the future\n", stderr);
return EXIT_FAILURE;
}
setvbuf(stdout, NULL, _IONBF, 0);
while (arg > now) {
printf("\r%03d:%02d:%02d:%02d",
(int) dif / 60 / 60 / 24,
(int) dif / 60 / 60 % 24,
(int) dif / 60 % 60,
(int) dif % 60);
sleep(1);
time(&now);
dif = arg - now;
}
printf("\r000:00:00:00\n");
return EXIT_SUCCESS;
}
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