source: lib/ior-stdio.c @ b7922c7

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivegetfragoffhelplibtrace4ndag_formatpfringrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since b7922c7 was b96e2e0, checked in by Yuwei Wang <yww4@…>, 12 years ago

fixed syntax error for ior-stdio.h

  • 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.h"
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <fcntl.h>
40#include <stdlib.h>
41#include <unistd.h>
42#include <string.h>
43
44/* Libtrace IO module implementing a standard IO reader, i.e. no decompression
45 */
46
47struct stdio_t {
48        int fd;
49};
50
51extern io_source_t stdio_source;
52
53#define DATA(io) ((struct stdio_t *)((io)->data))
54
55io_t *stdio_open(const char *filename)
56{
57        io_t *io = malloc(sizeof(io_t));
58        io->data = malloc(sizeof(struct stdio_t));
59
60        if (strcmp(filename,"-") == 0)
61                DATA(io)->fd = 0; /* STDIN */
62        else
63                DATA(io)->fd = open(filename,
64                        O_RDONLY
65#ifdef O_DIRECT
66                        |(force_directio_read?O_DIRECT:0)
67#endif
68                        );
69        io->source = &stdio_source;
70
71        if (DATA(io)->fd == -1) {
72                free(io);
73                return NULL;
74        }
75
76        return io;
77}
78
79static off_t stdio_read(io_t *io, void *buffer, off_t len)
80{
81        return read(DATA(io)->fd,buffer,len);
82}
83
84static off_t stdio_tell(io_t *io)
85{
86        return lseek(DATA(io)->fd, 0, SEEK_CUR);
87}
88
89static off_t stdio_seek(io_t *io, off_t offset, int whence)
90{
91        return lseek(DATA(io)->fd, offset, whence);
92}
93
94static void stdio_close(io_t *io)
95{
96        close(DATA(io)->fd);
97        free(io->data);
98        free(io);
99}
100
101io_source_t stdio_source = {
102        "stdio",
103        stdio_read,
104        NULL,
105        stdio_tell,
106        stdio_seek,
107        stdio_close
108};
109
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