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- /* SCCS Id: @(#)pcunix.c 1.4 87/08/08
- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
- /* unix.c - version 1.0.3 */
-
- /* This file collects some Unix dependencies; pager.c contains some more */
-
- /*
- * The time is used for:
- * - seed for rand()
- * - year on tombstone and yymmdd in record file
- * - phase of the moon (various monsters react to NEW_MOON or FULL_MOON)
- * - night and midnight (the undead are dangerous at midnight)
- * - determination of what files are "very old"
- */
-
- #include <stdio.h> /* mainly for NULL */
- #include "hack.h" /* mainly for index() which depends on BSD */
-
- #ifndef __TURBOC__ /* Turbo C has time_t in time.h */
- #include <sys/types.h> /* for time_t */
- #endif
- #include <time.h>
- #include <sys/stat.h>
-
- extern time_t time();
- static struct stat buf, hbuf;
-
- setrandom()
- {
- (void) srand((int) time ((time_t *) 0));
- }
-
- struct tm *
- getlt()
- {
- time_t date;
- struct tm *localtime();
-
- (void) time(&date);
- return(localtime(&date));
- }
-
- getyear()
- {
- return(1900 + getlt()->tm_year);
- }
-
- char *
- getdate()
- {
- static char datestr[7];
- register struct tm *lt = getlt();
-
- (void) sprintf(datestr, "%2d%2d%2d",
- lt->tm_year, lt->tm_mon + 1, lt->tm_mday);
- if(datestr[2] == ' ') datestr[2] = '0';
- if(datestr[4] == ' ') datestr[4] = '0';
- return(datestr);
- }
-
- phase_of_the_moon() /* 0-7, with 0: new, 4: full */
- { /* moon period: 29.5306 days */
- /* year: 365.2422 days */
- register struct tm *lt = getlt();
- register int epact, diy, golden;
-
- diy = lt->tm_yday;
- golden = (lt->tm_year % 19) + 1;
- epact = (11 * golden + 18) % 30;
- if ((epact == 25 && golden > 11) || epact == 24)
- epact++;
-
- return( (((((diy + epact) * 6) + 11) % 177) / 22) & 7 );
- }
-
- night()
- {
- register int hour = getlt()->tm_hour;
-
- return(hour < 6 || hour > 21);
- }
-
- midnight()
- {
- return(getlt()->tm_hour == 0);
- }
-
- gethdate(name) char *name; {
- /* old version - for people short of space */
- /*
- /* register char *np;
- /* if(stat(name, &hbuf))
- /* error("Cannot get status of %s.",
- /* (np = rindex(name, '/')) ? np+1 : name);
- /*
- /* version using PATH from: seismo!gregc@ucsf-cgl.ARPA (Greg Couch) */
-
- /*
- * The problem with #include <sys/param.h> is that this include file
- * does not exist on all systems, and moreover, that it sometimes includes
- * <sys/types.h> again, so that the compiler sees these typedefs twice.
- */
- #define MAXPATHLEN 1024
-
- register char *np, *path;
- char filename[MAXPATHLEN+1];
-
- if (index(name, '/') != NULL || (path = getenv("PATH")) == NULL)
- path = "";
-
- for (;;) {
- if ((np = index(path, ':')) == NULL)
- np = path + strlen(path); /* point to end str */
- if (np - path <= 1) /* %% */
- (void) strcpy(filename, name);
- else {
- (void) strncpy(filename, path, np - path);
- filename[np - path] = '/';
- (void) strcpy(filename + (np - path) + 1, name);
- }
- if (stat(filename, &hbuf) == 0)
- return;
- if (*np == '\0')
- path = "";
- path = np + 1;
- }
- error("Cannot get status of %s.", (np = rindex(name, '/')) ? np+1 : name);
- }
-
- uptodate(fd) {
- if(fstat(fd, &buf)) {
- pline("Cannot get status of saved level? ");
- return(0);
- }
- if(buf.st_mtime < hbuf.st_mtime) {
- pline("Saved level is out of date. ");
- return(0);
- }
- return(1);
- }
-
- regularize(s) /* normalize file name - we don't like ..'s or /'s */
- register char *s;
- {
- register char *lp;
-
- while((lp = index(s, '.')) || (lp = index(s, '/')))
- *lp = '_';
- }
-