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/*
* Copyright (C) 2024 Tristan Riehs
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "linenoise.h"
static int lower = 0;
static int upper = 100;
static FILE *logfile;
static char logbuf[64];
#define LOGBUF_OFFSET 11
/* Return a random number x such that lower <= x < upper. */
static int
calculer_rand(void)
{
return lower + rand()%(upper-lower);
}
static intptr_t
tp_ms(struct timespec const *tp)
{
return tp->tv_sec*1000 + tp->tv_nsec/1000000;
}
static void *
measure_before(void)
{
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
return (void *)tp_ms(&tp);
}
int
measure_after(void *data, int correct)
{
int t0 = (intptr_t) data;
struct timespec tp;
clock_gettime(CLOCK_REALTIME, &tp);
int t1 = tp_ms(&tp);
int dt = t1 - t0;
size_t bytes_written =
LOGBUF_OFFSET + sprintf(logbuf + LOGBUF_OFFSET,
"%d\t%d\n", dt, correct);
return bytes_written != fwrite(logbuf, 1, bytes_written, logfile);
}
int
main(void)
{
srand(time(NULL));
logfile = fopen("./calculer.log", "a");
assert(logfile);
time_t now = time(NULL);
struct tm *tm = localtime(&now);
size_t bytes_written = strftime(logbuf, sizeof(logbuf), "%F\t", tm);
assert(bytes_written);
while (1)
{
char prompt[32] = {0};
int x, y, res;
char *input;
int input_val;
x = calculer_rand();
y = calculer_rand();
res = x+y;
sprintf(prompt, "%d + %d = ", x, y);
void *measure_data = measure_before();
input = linenoise(prompt);
if ((!input) || (*input == '\0'))
{
free(input);
fclose(logfile);
exit(0);
}
input_val = atoi(input);
if (measure_after(measure_data, input_val == res))
{
free(input);
fclose(logfile);
exit(1);
}
if (input_val == res)
printf("RIGHT\n");
else
printf("WRONG\n");
free(input);
}
fclose(logfile);
return 0;
}
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