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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* The ManaPlus Client
* Copyright (C) 2013-2020 The ManaPlus Developers
* Copyright (C) 2020-2023 The ManaVerse Developers
*
* This file is part of The ManaPlus Client.
*
* 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
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "fs/virtfs/fsziprwops.h"
#include "logger.h"
#include "fs/virtfs/file.h"
#include "fs/virtfs/fsfuncs.h"
#include "utils/cast.h"
PRAGMA48(GCC diagnostic push)
PRAGMA48(GCC diagnostic ignored "-Wshadow")
#include <SDL_rwops.h>
PRAGMA48(GCC diagnostic pop)
#include "debug.h"
namespace VirtFs
{
namespace FsZip
{
RWOPSINT rwops_seek(SDL_RWops *const rw,
const RWOPSINT offset,
const int whence)
{
if (rw == nullptr)
return -1;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
const size_t mPos = handle->mPos;
const size_t mSize = handle->mSize;
RWOPSINT pos = 0;
if (whence == SEEK_SET)
{
pos = offset;
}
else if (whence == SEEK_CUR)
{
const int64_t current = mPos;
if (current == -1)
{
logger->assertLog(
"VirtFs::rwops_seek: Can't find position in file.");
return -1;
}
pos = CAST_S32(current);
if (static_cast<int64_t>(pos) != current)
{
logger->assertLog("VirtFs::rwops_seek: "
"Can't fit current file position in an int!");
return -1;
}
if (offset == 0) /* this is a "tell" call. We're done. */
return pos;
pos += offset;
}
else if (whence == SEEK_END)
{
pos = static_cast<RWOPSINT>(mSize + offset);
}
else
{
logger->assertLog(
"VirtFs::rwops_seek: Invalid 'whence' parameter.");
return -1;
}
if (pos < 0)
{
logger->assertLog("VirtFs::rwops_seek: "
"Attempt to seek past start of file.");
return -1;
}
handle->mPos = pos;
if (pos > static_cast<RWOPSINT>(mSize))
{
logger->assertLog("VirtFs::rwops_seek: seek error.");
return -1;
}
return pos;
}
RWOPSSIZE rwops_read(SDL_RWops *const rw,
void *const ptr,
const RWOPSSIZE size,
const RWOPSSIZE maxnum)
{
if (rw == nullptr)
return 0;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
const int64_t rc = handle->funcs->read(handle,
ptr,
CAST_U32(size),
CAST_U32(maxnum));
return CAST_S32(rc);
}
RWOPSSIZE rwops_write(SDL_RWops *const rw A_UNUSED,
const void *const ptr A_UNUSED,
const RWOPSSIZE size A_UNUSED,
const RWOPSSIZE num A_UNUSED)
{
return 0;
}
int rwops_close(SDL_RWops *const rw)
{
if (rw == nullptr)
return 0;
File *const handle = static_cast<File*>(
rw->hidden.unknown.data1);
delete handle;
SDL_FreeRW(rw);
return 0;
}
#ifdef USE_SDL2
RWOPSINT rwops_size(SDL_RWops *const rw)
{
if (!rw)
return 0;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
return handle->mSize;
}
#endif // USE_SDL2
} // namespace FsZip
} // namespace VirtFs
|
