source: libwandio/ior-stdio.c @ 17f954f

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivegetfragoffhelplibtrace4ndag_formatpfringrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since 17f954f was 10f924c, checked in by Shane Alcock <salcock@…>, 8 years ago

Fixed broken -fvisibility check in configure

  • Added a m4 script that does this properly rather than our hax gcc version check.
  • Tidied up CFLAGS in configure so we aren't adding the same sets of flags multiple times
  • Created a wandio_internal.h file for storing global variables that shouldn't be made public

Thanks to Alistair King, whose patch to try and make this work for
non-gcc systems brought my attention to just how broken this was :)

  • Property mode set to 100644
File size: 2.3 KB
Line 
1/*
2 * This file is part of libtrace
3 *
4 * Copyright (c) 2007,2008,2009,2010 The University of Waikato, Hamilton,
5 * New Zealand.
6 *
7 * Authors: Daniel Lawson
8 *          Perry Lorier
9 *          Shane Alcock
10 *         
11 * All rights reserved.
12 *
13 * This code has been developed by the University of Waikato WAND
14 * research group. For further information please see http://www.wand.net.nz/
15 *
16 * libtrace is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * libtrace is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with libtrace; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
29 *
30 * $Id$
31 *
32 */
33
34
35#define _GNU_SOURCE 1
36#include "wandio_internal.h"
37#include "wandio.h"
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <fcntl.h>
41#include <stdlib.h>
42#include <unistd.h>
43#include <string.h>
44
45/* Libtrace IO module implementing a standard IO reader, i.e. no decompression
46 */
47
48struct stdio_t {
49        int fd;
50};
51
52extern io_source_t stdio_source;
53
54#define DATA(io) ((struct stdio_t *)((io)->data))
55
56io_t *stdio_open(const char *filename)
57{
58        io_t *io = malloc(sizeof(io_t));
59        io->data = malloc(sizeof(struct stdio_t));
60
61        if (strcmp(filename,"-") == 0)
62                DATA(io)->fd = 0; /* STDIN */
63        else
64                DATA(io)->fd = open(filename,
65                        O_RDONLY
66#ifdef O_DIRECT
67                        |(force_directio_read?O_DIRECT:0)
68#endif
69                        );
70        io->source = &stdio_source;
71
72        if (DATA(io)->fd == -1) {
73                free(io);
74                return NULL;
75        }
76
77        return io;
78}
79
80static off_t stdio_read(io_t *io, void *buffer, off_t len)
81{
82        return read(DATA(io)->fd,buffer,len);
83}
84
85static off_t stdio_tell(io_t *io)
86{
87        return lseek(DATA(io)->fd, 0, SEEK_CUR);
88}
89
90static off_t stdio_seek(io_t *io, off_t offset, int whence)
91{
92        return lseek(DATA(io)->fd, offset, whence);
93}
94
95static void stdio_close(io_t *io)
96{
97        close(DATA(io)->fd);
98        free(io->data);
99        free(io);
100}
101
102io_source_t stdio_source = {
103        "stdio",
104        stdio_read,
105        NULL,
106        stdio_tell,
107        stdio_seek,
108        stdio_close
109};
110
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