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
|
/* nbdkit
* Copyright Red Hat
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Red Hat nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''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 RED HAT OR
* CONTRIBUTORS 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.
*/
/* Replacement for open_memstream for platforms which lack this function. */
#include <config.h>
#include <stdio.h>
#include "open_memstream.h"
#ifndef HAVE_OPEN_MEMSTREAM
#ifdef WIN32
/* Replacement open_memstream for Win32. */
#include <windows.h>
#include <assert.h>
/* This is provided by common/utils which hasn't been compiled yet.
* Programs using this replacement will need to link to
* libutils.la. XXX
*/
#include "../utils/vector.h"
#include "../utils/nbdkit-string.h"
/* Map FILE* that we return to the user buffer. */
struct file_to_memstream {
FILE *fp;
char tmpname[MAX_PATH];
char **ptr;
size_t *size;
};
DEFINE_VECTOR_TYPE (file_vector, struct file_to_memstream);
static file_vector files = empty_vector;
FILE *
open_memstream (char **ptr, size_t *size)
{
struct file_to_memstream f2m;
char tmppath[MAX_PATH];
DWORD ret;
FILE *fp;
ret = GetTempPath (MAX_PATH, tmppath);
if (ret > MAX_PATH || ret == 0)
return NULL;
ret = GetTempFileName (tmppath, TEXT ("nbdkit"), 0, f2m.tmpname);
if (!ret)
return NULL;
fp = fopen (f2m.tmpname, "w+");
if (fp == NULL)
return NULL;
f2m.fp = fp;
f2m.ptr = ptr;
f2m.size = size;
if (file_vector_append (&files, f2m) == -1) {
fclose (fp);
return NULL;
}
return fp;
}
int
close_memstream (FILE *fp)
{
size_t i;
int c, r;
string content = empty_vector;
struct file_to_memstream *f2m;
for (i = 0; i < files.len; ++i) {
if (files.ptr[i].fp == fp)
break;
}
assert (i < files.len);
f2m = &files.ptr[i];
/* Read the file back into memory. */
rewind (fp);
while ((c = getc (fp)) != EOF) {
if (string_append (&content, c) == -1) {
append_failed:
fclose (fp);
unlink (f2m->tmpname);
free (content.ptr);
file_vector_remove (&files, i);
return -1;
}
}
/* Make sure the buffer is \0-terminated but don't include this
* in the buffer size returned below.
*/
if (string_append (&content, 0) == -1) goto append_failed;
r = fclose (fp);
unlink (f2m->tmpname);
if (r == EOF) {
free (content.ptr);
file_vector_remove (&files, i);
return -1;
}
/* Pass the buffer to the user. User will free it. */
*(files.ptr[i].ptr) = content.ptr;
*(files.ptr[i].size) = content.len - 1;
file_vector_remove (&files, i);
return 0;
}
#else /* !WIN32 */
#error "no replacement open_memstream is available on this platform"
#endif
#endif /* !HAVE_OPEN_MEMSTREAM */
|
