dot_testing/c/timer.c

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C
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <poll.h>
#include <string.h>
struct timer {
int s; /* seconds */
int d; /* data storage */
void (*u)(struct timer *t); /* update function */
int (*c)(struct timer *t); /* stop check function */
int (*p)(struct timer *t); /* pause check function */
};
void timerdec(struct timer *t) { if (t->s != 0) t->s--; }
void timerinc(struct timer *t) { t->s++; }
void timerupdate(struct timer *t) { if(t->u != NULL) t->u(t); }
int timerstate(int (*f)(struct timer *t), struct timer *t) {
if(f != NULL) {
if(f(t)) return 1;
else return 0;
}
return 0;
}
int timerstop(struct timer *t) { return timerstate(t->c, t); }
int timerpause(struct timer *t) { return timerstate(t->p, t); }
int timerzero(struct timer *t) {
if(t->s == 0) return 1;
return 0;
}
int seconds(int t) { return t % 60; }
int minutes(int t) { return (t / 60) % 60; }
int minute(int t) { return t / 60; }
int hours(int t) { return (t / 60) / 60; }
struct timer *timerinit(void) {
struct timer *t = malloc(sizeof *t);
t->s = 0;
t->d = 0;
t->u = NULL;
t->c = NULL;
t->p = NULL;
return t;
}
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struct settings {
int e:1; /* use escape (v assumed) */
int v:1; /* verbose */
int d:1; /* count down/up (1/0) */
int b:1; /* ascii bel when done */
int f:1; /* display hours */
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int t:1; /* tomato timer */
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int s; /* seconds */
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} s = {
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.e = 0,
.v = 0,
.d = 0,
.b = 0,
.f = 0,
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.t = 0,
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.s = 0
};
int timerissettings(struct timer *t) {
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if(t->s == 0) return 0;
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if(s.s == t->s) return 1;
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return 0;
}
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int tomatotimer(struct timer *t) {
if(t->s != 0) return 0;
if(t->d % 2) t->s = s.s / 2;
else t->s = s.s;
t->d++;
return 1;
}
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char *timerdisp(struct timer *t) {
char *str = malloc(20);
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if(s.f) snprintf(str, 20, "%02i:%02i:%02i",
hours(t->s), minutes(t->s), seconds(t->s));
/* TODO: give minute(...) and minutes(...) better names */
else snprintf(str, 20, "%02i:%02i", minute(t->s), seconds(t->s));
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return str;
}
void timerloop() {
struct timer *t = timerinit();
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if(s.d) {
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t->u = timerdec;
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t->s = s.s;
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t->c = timerzero;
} else {
t->u = timerinc;
t->c = timerissettings;
}
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if(s.t) {
t->u = timerdec;
if(s.s == 0) s.s = 20 * 60;
t->s = s.s;
t->d = 1;
t->p = tomatotimer;
t->c = NULL;
}
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char *c;
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int e;
struct pollfd p = { .fd = STDIN_FILENO, .events = POLLIN };
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for(;;) {
poll(&p, 1, 60);
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if((e = (p.revents == POLLIN)) || timerpause(t)) {
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/* TODO: make this nicer */
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if(e) getchar();
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if(s.e) {
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c = timerdisp(t);
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if(e) printf("\r\e[1A* %s", c);
else printf("\r* %s", c);
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}
getchar();
/* TODO: stop relying on hard assumptions */
if(s.e) printf("\r\e[1A \r");
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}
c = timerdisp(t);
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if(s.e) {
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printf("%s\r", c);
fflush(stdout);
}
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else if(s.v) printf("%s\n", c);
if(timerstop(t)) break;
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free(c);
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timerupdate(t);
sleep(1);
}
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if(s.b) putchar('\a');
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free(t);
free(c);
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}
int main(int argc, char **argv) {
char c;
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while((c = getopt(argc, argv, "evdbfth:m:s:")) != -1) {
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switch(c) {
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break; case 'e': s.e = 1;
break; case 'v': s.v = 1;
break; case 'd': s.d = 1;
break; case 'b': s.b = 1;
break; case 'f': s.f = 1;
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break; case 't': s.t = 1;
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break; case 'h': s.s = s.s + (atoi(optarg) * 3600);
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break; case 'm': s.s = s.s + (atoi(optarg) * 60);
break; case 's': s.s = s.s + atoi(optarg);
break; case '?': return 1;
break; default: abort();
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}
}
timerloop();
return 0;
}