1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*-
* Copyright (c) 2003-2007 Tim Kientzle
* Copyright (c) 2010-2011 Michihiro NAKAJIMA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD$");
#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_entry_private.h"
/*
* sparse handling
*/
void
archive_entry_sparse_clear(struct archive_entry *entry)
{
struct ae_sparse *sp;
while (entry->sparse_head != NULL) {
sp = entry->sparse_head->next;
free(entry->sparse_head);
entry->sparse_head = sp;
}
entry->sparse_tail = NULL;
}
void
archive_entry_sparse_add_entry(struct archive_entry *entry,
int64_t offset, int64_t length)
{
struct ae_sparse *sp;
if (offset < 0 || length < 0)
/* Invalid value */
return;
if (offset + length < 0 ||
offset + length > archive_entry_size(entry))
/* A value of "length" parameter is too large. */
return;
if ((sp = entry->sparse_tail) != NULL) {
if (sp->offset + sp->length > offset)
/* Invalid value. */
return;
if (sp->offset + sp->length == offset) {
if (sp->offset + sp->length + length < 0)
/* A value of "length" parameter is
* too large. */
return;
/* Expand existing sparse block size. */
sp->length += length;
return;
}
}
if ((sp = (struct ae_sparse *)malloc(sizeof(*sp))) == NULL)
/* XXX Error XXX */
return;
sp->offset = offset;
sp->length = length;
sp->next = NULL;
if (entry->sparse_head == NULL)
entry->sparse_head = entry->sparse_tail = sp;
else {
/* Add a new sparse block to the tail of list. */
if (entry->sparse_tail != NULL)
entry->sparse_tail->next = sp;
entry->sparse_tail = sp;
}
}
/*
* returns number of the sparse entries
*/
int
archive_entry_sparse_count(struct archive_entry *entry)
{
struct ae_sparse *sp;
int count = 0;
for (sp = entry->sparse_head; sp != NULL; sp = sp->next)
count++;
/*
* Sanity check if this entry is exactly sparse.
* If amount of sparse blocks is just one and it indicates the whole
* file data, we should remove it and return zero.
*/
if (count == 1) {
sp = entry->sparse_head;
if (sp->offset == 0 &&
sp->length >= archive_entry_size(entry)) {
count = 0;
archive_entry_sparse_clear(entry);
}
}
return (count);
}
int
archive_entry_sparse_reset(struct archive_entry * entry)
{
entry->sparse_p = entry->sparse_head;
return archive_entry_sparse_count(entry);
}
int
archive_entry_sparse_next(struct archive_entry * entry,
int64_t *offset, int64_t *length)
{
if (entry->sparse_p) {
*offset = entry->sparse_p->offset;
*length = entry->sparse_p->length;
entry->sparse_p = entry->sparse_p->next;
return (ARCHIVE_OK);
} else {
*offset = 0;
*length = 0;
return (ARCHIVE_WARN);
}
}
/*
* end of sparse handling
*/
|
