Sort events by date.

Correct long-standing off-by-one error in -W option.

Submitted by: edwin@

Shorten some long lines.  These files are still not completely
style(9) compliant.

3 files changed, 119 insertions, 32 deletions

diff --git a/usr.bin/calendar/calendar.h b/usr.bin/calendar/calendar.h
index 48fb785..4f4297b 100644
--- a/usr.bin/calendar/calendar.h
+++ b/usr.bin/calendar/calendar.h
@@ -42,6 +42,7 @@ extern struct iovec header[];
 extern struct tm *tp;
 extern const char *calendarFile;
 extern int *cumdays;
+extern int yrdays;
 extern struct fixs neaster, npaskha;
 
 void	 cal(void);
@@ -68,7 +69,7 @@ void     setnnames(void);
 #define	F_ISDAYVAR	0x04 /* variables day of week, like SundayLast */
 #define	F_EASTER	0x08 /* Easter or easter depending days */
 
-extern int f_dayAfter; /* days after current date */
+extern int f_dayAfter;	/* days after current date */
 extern int f_dayBefore; /* days bevore current date */
 extern int Friday;	/* day before weekend */
 
@@ -77,3 +78,16 @@ struct fixs {
 	int len;
 };
 
+struct event *event_add(struct event *events, int month, int day, char *date,
+                        int var, char *txt);
+void event_continue(struct event *events, char *txt);
+void event_print_all(FILE *fp, struct event *events);
+/* Stored calendar event */
+struct event {
+	int month;
+	int day;
+	int var;
+	char *date;
+	char *text;
+	struct event *next;
+};
diff --git a/usr.bin/calendar/day.c b/usr.bin/calendar/day.c
index e103c84..8e3317b 100644
--- a/usr.bin/calendar/day.c
+++ b/usr.bin/calendar/day.c
@@ -49,7 +49,7 @@ __FBSDID("$FreeBSD$");
 
 struct tm *tp;
 static const struct tm tm0;
-int *cumdays, offset, yrdays;
+int *cumdays, yrdays;
 char dayname[10];
 
 
@@ -151,7 +151,8 @@ settime(time_t now)
 		cumdays = daytab[0];
 	}
 	/* Friday displays Monday's events */
-	offset = tp->tm_wday == Friday ? 3 : 1;
+	if (f_dayAfter == 0 && f_dayBefore == 0 && Friday != -1)
+		f_dayAfter = tp->tm_wday == Friday ? 3 : 1;
 	header[5].iov_base = dayname;
 
 	oldl = NULL;
@@ -375,27 +376,10 @@ isnow(char *endp, int *monthp, int *dayp, int *varp)
 	}
 
 #ifdef DEBUG
-	fprintf(stderr, "day2: day %d(%d-%d) yday %d\n", *dayp, day, cumdays[month], tp->tm_yday);
+	fprintf(stderr, "day2: day %d(%d-%d) yday %d\n", *dayp, day,
+                cumdays[month], tp->tm_yday);
 #endif
 
-	/* when only today and tomorrow (or today and the next three days if
-	   it is friday) is needed */
-	if (f_dayBefore == 0 &&
-	    f_dayAfter == 0 ) {
-		/* no year rollover */
-		if (day >= tp->tm_yday &&
-		    day <= tp->tm_yday + offset)
-			return (1);
-		/* year rollover */
-		if (tp->tm_yday + offset >= yrdays) {
-			int end = tp->tm_yday + offset - yrdays;
-			if (day <= end)
-				return (1);
-		}
-
-		return (0);
-	}
-
 	/* When days before or days after is specified */
 	/* no year rollover */
 	if (day >= tp->tm_yday - f_dayBefore &&
diff --git a/usr.bin/calendar/io.c b/usr.bin/calendar/io.c
index ee5b988..e5a0a08 100644
--- a/usr.bin/calendar/io.c
+++ b/usr.bin/calendar/io.c
@@ -96,6 +96,7 @@ cal(void)
 	int var;
 	static int d_first = -1;
 	char buf[2048 + 1];
+	struct event *events = NULL;
 
 	if ((fp = opencal()) == NULL)
 		return;
@@ -155,23 +156,109 @@ cal(void)
 				(void)strftime(dbuf, sizeof(dbuf),
 					       d_first ? "%e %b" : "%b %e",
 					       &tm);
-				(void)fprintf(fp, "%s%c%s\n", dbuf,
-				    var ? '*' : ' ', p);
+				events = event_add(events, month, day, dbuf, var, p);
 			}
 		}
 		else if (printing)
-			fprintf(fp, "%s\n", buf);
+			event_continue(events, buf);
 	}
+
+	event_print_all(fp, events);
 	closecal(fp);
 }
 
+/*
+ * Functions to handle buffered calendar events.
+ */
+struct event *
+event_add(struct event *events, int month, int day, char *date, int var, char *txt)
+{
+	struct event *e;
+
+	e = (struct event *)calloc(1, sizeof(struct event));
+	if (e == NULL)
+		errx(1, "event_add: cannot allocate memory");
+	e->month = month;
+	e->day = day;
+	e->var = var;
+	e->date = strdup(date);
+	if (e->date == NULL)
+		errx(1, "event_add: cannot allocate memory");
+	e->text = strdup(txt);
+	if (e->text == NULL)
+		errx(1, "event_add: cannot allocate memory");
+	e->next = events;
+
+	return e;
+}
+
+void
+event_continue(struct event *e, char *txt)
+{
+	char *text;
+
+	text = strdup(e->text);
+	if (text == NULL)
+		errx(1, "event_continue: cannot allocate memory");
+
+	free(e->text);
+	e->text = (char *)malloc(strlen(text) + strlen(txt) + 3);
+	if (e->text == NULL)
+		errx(1, "event_continue: cannot allocate memory");
+	strcpy(e->text, text);
+	strcat(e->text, "\n");
+	strcat(e->text, txt);
+	free(text);
+
+	return;
+}
+
+void
+event_print_all(FILE *fp, struct event *events)
+{
+	struct event *e, *e_next;
+	int daycount = f_dayAfter + f_dayBefore;
+	int daycounter;
+	int day, month;
+
+	for (daycounter = 0; daycounter <= daycount; daycounter++) {
+		day = tp->tm_yday - f_dayBefore + daycounter;
+		if (day < 0) day += yrdays;
+		if (day >= yrdays) day -= yrdays;
+
+		month = 1;
+		while (month <= 12) {
+			if (day <= cumdays[month])
+				break;
+			month++;
+		}
+		month--;
+		day -= cumdays[month];
+
+#ifdef DEBUG
+		fprintf(stderr,"event_print_allmonth: %d, day: %d\n",month,day);
+#endif
+
+		for (e = events; e != NULL; e = e_next ) {
+			e_next = e->next;
+
+			if (month != e->month || day != e->day)
+				continue;
+
+			(void)fprintf(fp, "%s%c%s\n", e->date,
+			    e->var ? '*' : ' ', e->text);
+		}
+	}
+}
+
 int
 getfield(char *p, char **endp, int *flags)
 {
 	int val, var;
 	char *start, savech;
 
-	for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p);
+	for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p)
+               && *p != '*'; ++p);
 	if (*p == '*') {			/* `*' is current month */
 		*flags |= F_ISMONTH;
 		*endp = p+1;
@@ -179,16 +266,17 @@ getfield(char *p, char **endp, int *flags)
 	}
 	if (isdigit((unsigned char)*p)) {
 		val = strtol(p, &p, 10);	/* if 0, it's failure */
-		for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p);
+		for (; !isdigit((unsigned char)*p)
+                       && !isalpha((unsigned char)*p) && *p != '*'; ++p);
 		*endp = p;
 		return (val);
 	}
 	for (start = p; isalpha((unsigned char)*++p););
-	
+
 	/* Sunday-1 */
-	if (*p == '+' || *p == '-') 
+	if (*p == '+' || *p == '-')
 	    for(; isdigit((unsigned char)*++p););
-	    
+
 	savech = *p;
 	*p = '\0';
 
@@ -207,7 +295,7 @@ getfield(char *p, char **endp, int *flags)
 #ifdef DEBUG
 		printf("var: %d\n", var);
 #endif
-	    } 
+	    }
 	}
 
 	/* Easter */
@@ -223,7 +311,8 @@ getfield(char *p, char **endp, int *flags)
 		*p = savech;
 		return (0);
 	}
-	for (*p = savech; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p);
+	for (*p = savech; !isdigit((unsigned char)*p)
+               && !isalpha((unsigned char)*p) && *p != '*'; ++p);
 	*endp = p;
 	return (val);
 }