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/*
* UNG's Not GNU
*
* Copyright (c) 2022, Jakob Kaivo <jkk@ung.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define _POSIX_C_SOURCE 200809L
#include <locale.h>
#include <regex.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
setlocale(LC_ALL, "");
int c;
while ((c = getopt(argc, argv, "")) != -1) {
switch (c) {
/* portable applications should not use operands */
default:
return 1;
}
}
FILE *f = fopen("calendar", "r");
if (f == NULL) {
perror("calendar: couldn't open calendar file");
return 1;
}
regex_t re[12] = { { 0 } };
time_t now = time(NULL);
struct tm *tm = localtime(&now);
size_t nregs = 6; /* 3 for today, 3 for tomorrow */
switch (tm->tm_wday) {
case 5: /* Friday, extend another day */
nregs += 3;
/* FALLTHRU */
case 6: /* Saturday, extend one day */
nregs += 3;
/* FALLTHRU */
default:
break;
}
const long SECONDS_PER_DAY = 60 * 60 * 24;
const int REFLAGS = REG_ICASE | REG_NOSUB | REG_EXTENDED;
for (size_t i = 0; i < nregs; i += 3) {
char buf[64];
strftime(buf, sizeof(buf), "%b.? +%e", tm);
if (regcomp(re + i, buf, REFLAGS) != 0) {
perror(buf);
return 1;
}
strftime(buf, sizeof(buf), "%B %e", tm);
if (regcomp(re + i + 1, buf, REFLAGS) != 0) {
perror(buf);
return 1;
}
strftime(buf, sizeof(buf), "%m/%d", tm);
if (regcomp(re + i + 2, buf, REFLAGS) != 0) {
perror(buf);
return 1;
}
now += SECONDS_PER_DAY;
tm = localtime(&now);
}
char line[1024];
while (fgets(line, sizeof(line), f) != NULL) {
for (size_t i = 0; i < nregs; i++) {
if (regexec(re + i, line, 0, NULL, 0) == 0) {
fputs(line, stdout);
continue;
}
}
}
}
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