1#ifndef MTOOLS_STREAM_H
2#define MTOOLS_STREAM_H
3
4/*  Copyright 1996-1999,2001,2002,2005,2006,2008,2009 Alain Knaff.
5 *  This file is part of mtools.
6 *
7 *  Mtools is free software: you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License as published by
9 *  the Free Software Foundation, either version 3 of the License, or
10 *  (at your option) any later version.
11 *
12 *  Mtools is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 *  GNU General Public License for more details.
16 *
17 *  You should have received a copy of the GNU General Public License
18 *  along with Mtools.  If not, see <http://www.gnu.org/licenses/>.
19 */
20
21typedef struct Stream_t {
22	struct Class_t *Class;
23	int refs;
24	struct Stream_t *Next;
25	struct Stream_t *Buffer;
26} Stream_t;
27
28#include "mtools.h"
29#include "msdos.h"
30
31#include "llong.h"
32
33doscp_t *get_dosConvert_pass_through(Stream_t *Stream);
34
35typedef struct Class_t {
36	int (*read)(Stream_t *, char *, mt_off_t, size_t);
37	int (*write)(Stream_t *, char *, mt_off_t, size_t);
38	int (*flush)(Stream_t *);
39	int (*freeFunc)(Stream_t *);
40	int (*set_geom)(Stream_t *, device_t *, device_t *, int media,
41					struct bootsector *);
42	int (*get_data)(Stream_t *, time_t *, mt_size_t *, int *, int *);
43	int (*pre_allocate)(Stream_t *, mt_size_t);
44
45	doscp_t *(*get_dosConvert)(Stream_t *);
46} Class_t;
47
48#define READS(stream, buf, address, size) \
49((stream)->Class->read)( (stream), (char *) (buf), (address), (size) )
50
51#define WRITES(stream, buf, address, size) \
52((stream)->Class->write)( (stream), (char *) (buf), (address), (size) )
53
54#define SET_GEOM(stream, dev, orig_dev, media, boot) \
55(stream)->Class->set_geom( (stream), (dev), (orig_dev), (media), (boot) )
56
57#define GET_DATA(stream, date, size, type, address) \
58(stream)->Class->get_data( (stream), (date), (size), (type), (address) )
59
60#define PRE_ALLOCATE(stream, size) \
61(stream)->Class->pre_allocate((stream), (size))
62
63#define GET_DOSCONVERT(stream)			\
64	(stream)->Class->get_dosConvert((stream))
65
66int flush_stream(Stream_t *Stream);
67Stream_t *copy_stream(Stream_t *Stream);
68int free_stream(Stream_t **Stream);
69
70#define FLUSH(stream) \
71flush_stream( (stream) )
72
73#define FREE(stream) \
74free_stream( (stream) )
75
76#define COPY(stream) \
77copy_stream( (stream) )
78
79
80#define DeclareThis(x) x *This = (x *) Stream
81
82int force_write(Stream_t *Stream, char *buf, mt_off_t start, size_t len);
83int force_read(Stream_t *Stream, char *buf, mt_off_t start, size_t len);
84
85int get_data_pass_through(Stream_t *Stream, time_t *date, mt_size_t *size,
86						  int *type, int *address);
87
88int read_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len);
89int write_pass_through(Stream_t *Stream, char *buf, mt_off_t start, size_t len);
90
91
92#endif
93
94