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
|
///////////////////////////////////////////////////////////////////////////////
//
/// \file suffix.c
/// \brief Checks filename suffix and creates the destination filename
//
// Copyright (C) 2007 Lasse Collin
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#include "private.h"
static const struct {
const char *compressed;
const char *uncompressed;
} suffixes[] = {
{ ".lzma", "" },
{ ".tlz", ".tar" },
{ ".ylz", ".yar" },
{ NULL, NULL }
};
/// \brief Checks if src_name has given compressed_suffix
///
/// \param suffix Filename suffix to look for
/// \param src_name Input filename
/// \param src_len strlen(src_name)
///
/// \return If src_name has the suffix, src_len - strlen(suffix) is
/// returned. It's always a positive integer. Otherwise zero
/// is returned.
static size_t
test_suffix(const char *suffix, const char *src_name, size_t src_len)
{
const size_t suffix_len = strlen(suffix);
// The filename must have at least one character in addition to
// the suffix. src_name may contain path to the filename, so we
// need to check for directory separator too.
if (src_len <= suffix_len || src_name[src_len - suffix_len - 1] == '/')
return 0;
if (strcmp(suffix, src_name + src_len - suffix_len) == 0)
return src_len - suffix_len;
return 0;
}
/// \brief Removes the filename suffix of the compressed file
///
/// \return Name of the uncompressed file, or NULL if file has unknown
/// suffix.
static char *
uncompressed_name(const char *src_name)
{
const char *new_suffix = "";
const size_t src_len = strlen(src_name);
size_t new_len = 0;
for (size_t i = 0; suffixes[i].compressed != NULL; ++i) {
new_len = test_suffix(suffixes[i].compressed,
src_name, src_len);
if (new_len != 0) {
new_suffix = suffixes[i].uncompressed;
break;
}
}
if (new_len == 0 && opt_suffix != NULL)
new_len = test_suffix(opt_suffix, src_name, src_len);
if (new_len == 0) {
errmsg(V_WARNING, _("%s: Filename has an unknown suffix, "
"skipping"), src_name);
return NULL;
}
const size_t new_suffix_len = strlen(new_suffix);
char *dest_name = malloc(new_len + new_suffix_len + 1);
if (dest_name == NULL) {
out_of_memory();
return NULL;
}
memcpy(dest_name, src_name, new_len);
memcpy(dest_name + new_len, new_suffix, new_suffix_len);
dest_name[new_len + new_suffix_len] = '\0';
return dest_name;
}
/// \brief Appends suffix to src_name
static char *
compressed_name(const char *src_name)
{
const size_t src_len = strlen(src_name);
for (size_t i = 0; suffixes[i].compressed != NULL; ++i) {
if (test_suffix(suffixes[i].compressed, src_name, src_len)
!= 0) {
errmsg(V_WARNING, _("%s: File already has `%s' "
"suffix, skipping"), src_name,
suffixes[i].compressed);
return NULL;
}
}
const char *suffix = opt_suffix != NULL
? opt_suffix : suffixes[0].compressed;
const size_t suffix_len = strlen(suffix);
char *dest_name = malloc(src_len + suffix_len + 1);
if (dest_name == NULL) {
out_of_memory();
return NULL;
}
memcpy(dest_name, src_name, src_len);
memcpy(dest_name + src_len, suffix, suffix_len);
dest_name[src_len + suffix_len] = '\0';
return dest_name;
}
extern char *
get_dest_name(const char *src_name)
{
return opt_mode == MODE_COMPRESS
? compressed_name(src_name)
: uncompressed_name(src_name);
}
|
