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
|
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 Simon Howard
//
// 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.
//
// DESCRIPTION:
// WAD I/O functions.
//
#ifndef __W_FILE__
#define __W_FILE__
#include <stdio.h>
#include "doomtype.h"
typedef struct _wad_file_s wad_file_t;
typedef struct
{
// Open a file for reading.
wad_file_t *(*OpenFile)(char *path);
// Close the specified file.
void (*CloseFile)(wad_file_t *file);
// Read data from the specified position in the file into the
// provided buffer. Returns the number of bytes read.
size_t (*Read)(wad_file_t *file, unsigned int offset,
void *buffer, size_t buffer_len);
} wad_file_class_t;
struct _wad_file_s
{
// Class of this file.
wad_file_class_t *file_class;
// If this is NULL, the file cannot be mapped into memory. If this
// is non-NULL, it is a pointer to the mapped file.
byte *mapped;
// Length of the file, in bytes.
unsigned int length;
};
// Open the specified file. Returns a pointer to a new wad_file_t
// handle for the WAD file, or NULL if it could not be opened.
wad_file_t *W_OpenFile(char *path);
// Close the specified WAD file.
void W_CloseFile(wad_file_t *wad);
// Read data from the specified file into the provided buffer. The
// data is read from the specified offset from the start of the file.
// Returns the number of bytes read.
size_t W_Read(wad_file_t *wad, unsigned int offset,
void *buffer, size_t buffer_len);
#endif /* #ifndef __W_FILE__ */
|
