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
|
/*
* Schism Tracker - a cross-platform Impulse Tracker clone
* copyright (c) 2003-2005 Storlek <storlek@rigelseven.com>
* copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org>
* copyright (c) 2009 Storlek & Mrs. Brisby
* copyright (c) 2010-2012 Storlek
* URL: http://schismtracker.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#if HAVE_MMAP
#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include "slurp.h"
static void _munmap_slurp(slurp_t *useme)
{
(void)munmap((void*)useme->data, useme->length);
(void)close(useme->extra);
}
int slurp_mmap(slurp_t *useme, const char *filename, size_t st)
{
int fd;
void *addr;
fd = open(filename, O_RDONLY);
if (fd == -1) return 0;
addr = mmap(NULL, st, PROT_READ, MAP_SHARED
#if defined(MAP_POPULATE) && defined(MAP_NONBLOCK)
| MAP_POPULATE | MAP_NONBLOCK
#endif
#if defined(MAP_NORESERVE)
| MAP_NORESERVE
#endif
, fd, 0);
if (!addr || addr == ((void*)-1)) {
(void)close(fd);
return -1;
}
useme->closure = _munmap_slurp;
useme->length = st;
useme->data = addr;
useme->extra = fd;
return 1;
}
#endif
|
