events.c revision 330449 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1992-2009 Edwin Groothuis <edwin@FreeBSD.org>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: stable/11/usr.bin/calendar/events.c 330449 2018-03-05 07:26:05Z eadler $");
32
33#include <sys/time.h>
34#include <err.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38
39#include "pathnames.h"
40#include "calendar.h"
41
42struct event *
43event_add(int year, int month, int day, char *date, int var, char *txt,
44    char *extra)
45{
46	struct event *e;
47
48	/*
49	 * Creating a new event:
50	 * - Create a new event
51	 * - Copy the machine readable day and month
52	 * - Copy the human readable and language specific date
53	 * - Copy the text of the event
54	 */
55	e = (struct event *)calloc(1, sizeof(struct event));
56	if (e == NULL)
57		errx(1, "event_add: cannot allocate memory");
58	e->month = month;
59	e->day = day;
60	e->var = var;
61	e->date = strdup(date);
62	if (e->date == NULL)
63		errx(1, "event_add: cannot allocate memory");
64	e->text = strdup(txt);
65	if (e->text == NULL)
66		errx(1, "event_add: cannot allocate memory");
67	e->extra = NULL;
68	if (extra != NULL && extra[0] != '\0')
69		e->extra = strdup(extra);
70	addtodate(e, year, month, day);
71	return (e);
72}
73
74void
75event_continue(struct event *e, char *txt)
76{
77	char *text;
78
79	/*
80	 * Adding text to the event:
81	 * - Save a copy of the old text (unknown length, so strdup())
82	 * - Allocate enough space for old text + \n + new text + 0
83	 * - Store the old text + \n + new text
84	 * - Destroy the saved copy.
85	 */
86	text = strdup(e->text);
87	if (text == NULL)
88		errx(1, "event_continue: cannot allocate memory");
89
90	free(e->text);
91	e->text = (char *)malloc(strlen(text) + strlen(txt) + 3);
92	if (e->text == NULL)
93		errx(1, "event_continue: cannot allocate memory");
94	strcpy(e->text, text);
95	strcat(e->text, "\n");
96	strcat(e->text, txt);
97	free(text);
98
99	return;
100}
101
102void
103event_print_all(FILE *fp)
104{
105	struct event *e;
106
107	while (walkthrough_dates(&e) != 0) {
108#ifdef DEBUG
109		fprintf(stderr, "event_print_allmonth: %d, day: %d\n",
110		    month, day);
111#endif
112
113		/*
114		 * Go through all events and print the text of the matching
115		 * dates
116		 */
117		while (e != NULL) {
118			(void)fprintf(fp, "%s%c%s%s%s%s\n", e->date,
119			    e->var ? '*' : ' ', e->text,
120			    e->extra != NULL ? " (" : "",
121			    e->extra != NULL ? e->extra : "",
122			    e->extra != NULL ? ")" : ""
123			);
124
125			e = e->next;
126		}
127	}
128}
129