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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2008 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.
//
// 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.
//
// DESCRIPTION:
// WAD I/O functions.
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include "m_misc.h"
#include "w_file.h"
#include "z_zone.h"
typedef struct
{
wad_file_t wad;
FILE *fstream;
} stdc_wad_file_t;
extern wad_file_class_t stdc_wad_file;
static wad_file_t *W_StdC_OpenFile(char *path)
{
stdc_wad_file_t *result;
FILE *fstream;
fstream = fopen(path, "rb");
if (fstream == NULL)
{
return NULL;
}
// Create a new stdc_wad_file_t to hold the file handle.
result = Z_Malloc(sizeof(stdc_wad_file_t), PU_STATIC, 0);
result->wad.file_class = &stdc_wad_file;
result->wad.mapped = NULL;
result->wad.length = M_FileLength(fstream);
result->fstream = fstream;
return &result->wad;
}
static void W_StdC_CloseFile(wad_file_t *wad)
{
stdc_wad_file_t *stdc_wad;
stdc_wad = (stdc_wad_file_t *) wad;
fclose(stdc_wad->fstream);
Z_Free(stdc_wad);
}
// Read data from the specified position in the file into the
// provided buffer. Returns the number of bytes read.
size_t W_StdC_Read(wad_file_t *wad, unsigned int offset,
void *buffer, size_t buffer_len)
{
stdc_wad_file_t *stdc_wad;
size_t result;
stdc_wad = (stdc_wad_file_t *) wad;
// Jump to the specified position in the file.
fseek(stdc_wad->fstream, offset, SEEK_SET);
// Read into the buffer.
result = fread(buffer, 1, buffer_len, stdc_wad->fstream);
return result;
}
wad_file_class_t stdc_wad_file =
{
W_StdC_OpenFile,
W_StdC_CloseFile,
W_StdC_Read,
};
|
