1/*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "archive_platform.h"
27
28#ifdef HAVE_ERRNO_H
29#include <errno.h>
30#endif
31#ifdef HAVE_STDLIB_H
32#include <stdlib.h>
33#endif
34
35#include "archive.h"
36#include "archive_write_private.h"
37
38struct write_grzip {
39	struct archive_write_program_data *pdata;
40};
41
42static int archive_write_grzip_open(struct archive_write_filter *);
43static int archive_write_grzip_options(struct archive_write_filter *,
44		    const char *, const char *);
45static int archive_write_grzip_write(struct archive_write_filter *,
46		    const void *, size_t);
47static int archive_write_grzip_close(struct archive_write_filter *);
48static int archive_write_grzip_free(struct archive_write_filter *);
49
50int
51archive_write_add_filter_grzip(struct archive *_a)
52{
53	struct archive_write_filter *f = __archive_write_allocate_filter(_a);
54	struct write_grzip *data;
55
56	archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
57	    ARCHIVE_STATE_NEW, "archive_write_add_filter_grzip");
58
59	data = calloc(1, sizeof(*data));
60	if (data == NULL) {
61		archive_set_error(_a, ENOMEM, "Can't allocate memory");
62		return (ARCHIVE_FATAL);
63	}
64	data->pdata = __archive_write_program_allocate("grzip");
65	if (data->pdata == NULL) {
66		free(data);
67		archive_set_error(_a, ENOMEM, "Can't allocate memory");
68		return (ARCHIVE_FATAL);
69	}
70
71	f->name = "grzip";
72	f->code = ARCHIVE_FILTER_GRZIP;
73	f->data = data;
74	f->open = archive_write_grzip_open;
75	f->options = archive_write_grzip_options;
76	f->write = archive_write_grzip_write;
77	f->close = archive_write_grzip_close;
78	f->free = archive_write_grzip_free;
79
80	/* Note: This filter always uses an external program, so we
81	 * return "warn" to inform of the fact. */
82	archive_set_error(_a, ARCHIVE_ERRNO_MISC,
83	    "Using external grzip program for grzip compression");
84	return (ARCHIVE_WARN);
85}
86
87static int
88archive_write_grzip_options(struct archive_write_filter *f, const char *key,
89    const char *value)
90{
91	(void)f; /* UNUSED */
92	(void)key; /* UNUSED */
93	(void)value; /* UNUSED */
94	/* Note: The "warn" return is just to inform the options
95	 * supervisor that we didn't handle it.  It will generate
96	 * a suitable error if no one used this option. */
97	return (ARCHIVE_WARN);
98}
99
100static int
101archive_write_grzip_open(struct archive_write_filter *f)
102{
103	struct write_grzip *data = (struct write_grzip *)f->data;
104
105	return __archive_write_program_open(f, data->pdata, "grzip");
106}
107
108static int
109archive_write_grzip_write(struct archive_write_filter *f,
110    const void *buff, size_t length)
111{
112	struct write_grzip *data = (struct write_grzip *)f->data;
113
114	return __archive_write_program_write(f, data->pdata, buff, length);
115}
116
117static int
118archive_write_grzip_close(struct archive_write_filter *f)
119{
120	struct write_grzip *data = (struct write_grzip *)f->data;
121
122	return __archive_write_program_close(f, data->pdata);
123}
124
125static int
126archive_write_grzip_free(struct archive_write_filter *f)
127{
128	struct write_grzip *data = (struct write_grzip *)f->data;
129
130	__archive_write_program_free(data->pdata);
131	free(data);
132	return (ARCHIVE_OK);
133}
134