mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-11-04 06:09:48 +00:00
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* Calendar file v1.0. Copyright 1994 by Christopher Neufeld */
|
|
/* The executable for this file contains linked runtime libraries
|
|
copyrighted by The Byte Works. Used with permission. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <time.h>
|
|
#include <ctype.h>
|
|
|
|
#pragma stacksize 512
|
|
|
|
#define NMONTHS 12
|
|
#define NDAYS 31
|
|
#define MAXLINELEN 255
|
|
|
|
#define CALFILE "calendar"
|
|
|
|
#define SECSPERDAY (24 * 60 * 60)
|
|
|
|
const char months[NMONTHS][] = {"jan", "feb", "mar", "apr", "may", "jun",
|
|
"jul", "aug", "sep", "oct", "nov", "dec"};
|
|
|
|
int main(void)
|
|
{
|
|
FILE *ifile;
|
|
time_t t1, t2;
|
|
struct tm st1, st2;
|
|
int monthnum, daynum, dayschk, i, j;
|
|
char *ptr1, *ptr2, holdmnth[4];
|
|
static char thislin[MAXLINELEN+1];
|
|
long deltat;
|
|
|
|
if ((ifile = fopen(CALFILE, "r")) == NULL) exit(0);
|
|
t1 = time(NULL);
|
|
st1 = *localtime(&t1);
|
|
st1.tm_sec = st1.tm_min = st1.tm_hour = 0;
|
|
t1 = mktime(&st1);
|
|
dayschk = (st1.tm_wday >= 5) ? 8 - st1.tm_wday : 1;
|
|
thislin[MAXLINELEN] = 0;
|
|
while (!feof(ifile)) {
|
|
fgets(thislin, MAXLINELEN, ifile);
|
|
ptr1 = thislin;
|
|
while (isspace(*ptr1) && *ptr1 != 0) ptr1++;
|
|
if (*ptr1 == 0) continue; /* Blank line */
|
|
monthnum = -1;
|
|
if (isdigit(*ptr1)) { /* month/day format */
|
|
monthnum = strtoul(ptr1, &ptr2, 10) - 1;
|
|
daynum = strtoul(ptr2+1, NULL, 10);
|
|
if (monthnum < 0 || monthnum >= NMONTHS || daynum < 0 || daynum > NDAYS)
|
|
continue;
|
|
} else {
|
|
for (i=0; i<3; i++) holdmnth[i] = tolower(ptr1[i]);
|
|
holdmnth[3] = 0;
|
|
for (i = 0; i < NMONTHS; i++)
|
|
if (!(strcmp(holdmnth, months[i]))) {
|
|
monthnum = i;
|
|
break;
|
|
}
|
|
if (monthnum == -1) continue;
|
|
while (!isspace(*ptr1) && *ptr1 != 0) ptr1++;
|
|
if (*ptr1 == 0) continue;
|
|
while (isspace(*ptr1) && *ptr1 != 0) ptr1++;
|
|
if (*ptr1 == 0) continue;
|
|
daynum = atoi(ptr1);
|
|
if (daynum < 1 || daynum > NDAYS) continue;
|
|
}
|
|
st2.tm_sec = st2.tm_min = st2.tm_hour = st2.tm_isdst = 0;
|
|
st2.tm_mday = daynum;
|
|
st2.tm_mon = monthnum;
|
|
st2.tm_year = st1.tm_year;
|
|
t2 = mktime(&st2);
|
|
if ((deltat = difftime(t2, t1)) < 0) { /* Next year */
|
|
st2.tm_year++;
|
|
t2 = mktime(&st2);
|
|
deltat = difftime(t2, t1);
|
|
}
|
|
if (deltat <= dayschk * SECSPERDAY) printf(thislin);
|
|
}
|
|
fclose(ifile);
|
|
exit(0);
|
|
}
|