1 /*
2  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <err.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20 
21 #include "tmpl.h"
22 #include "lists.h"
23 
24 int	base(struct template *, struct tailhead *);
25 int	my_write(void *, const void *, size_t);
26 
27 int
28 my_write(void *arg, const void *s, size_t len)
29 {
30 	FILE	*fp = arg;
31 
32 	if (fwrite(s, 1, len, fp) < 0)
33 		return (-1);
34 
35 	return (0);
36 }
37 
38 int
39 main(int argc, char **argv)
40 {
41 	struct template	*tp;
42 	struct tailhead	 head;
43 	struct entry	*np;
44 	int		 i;
45 	char		 buf[3];
46 	/* use a ridiculously small buffer in regress */
47 
48 	if ((tp = template(stdout, my_write, buf, sizeof(buf))) == NULL)
49 		err(1, "template");
50 
51 	TAILQ_INIT(&head);
52 	for (i = 0; i < 2; ++i) {
53 		if ((np = calloc(1, sizeof(*np))) == NULL)
54 			err(1, "calloc");
55 		if (asprintf(&np->text, "%d", i+1) == -1)
56 			err(1, "asprintf");
57 		TAILQ_INSERT_TAIL(&head, np, entries);
58 	}
59 
60 	if (base(tp, &head) == -1 ||
61 	    template_flush(tp) == -1)
62 		return (1);
63 	puts("");
64 
65 	while ((np = TAILQ_FIRST(&head))) {
66 		TAILQ_REMOVE(&head, np, entries);
67 		free(np->text);
68 		free(np);
69 	}
70 
71 	if (base(tp, &head) == -1 ||
72 	    template_flush(tp) == -1)
73 		return (1);
74 	puts("");
75 
76 	template_free(tp);
77 	return (0);
78 }