summaryrefslogtreecommitdiff
path: root/src/fs/virtfs/virtfsrwops.cpp
blob: dfa6699bde24b919fb558e314e9cdef41a90d294 (plain) (blame)
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
/*
 *  The ManaPlus Client
 *  Copyright (C) 2013-2017  The ManaPlus 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/>.
 */

/*
 * This code provides a glue layer between PhysicsFS and Simple Directmedia
 *  Layer's (SDL) RWops i/o abstraction.
 *
 * License: this code is public domain. I make no warranty that it is useful,
 *  correct, harmless, or environmentally safe.
 *
 * This particular file may be used however you like, including copying it
 *  verbatim into a closed-source project, exploiting it commercially, and
 *  removing any trace of my name from the source (although I hope you won't
 *  do that). I welcome enhancements and corrections to this file, but I do
 *  not require you to send me patches if you make changes. This code has
 *  NO WARRANTY.
 *
 * Unless otherwise stated, the rest of PhysicsFS falls under the zlib license.
 *  Please see LICENSE.txt in the root of the source tree.
 *
 * SDL falls under the LGPL license. You can get SDL at http://www.libsdl.org/
 *
 *  This file was written by Ryan C. Gordon. (icculus@icculus.org).
 *
 *  Copyright (C) 2012-2017  The ManaPlus Developers
 */

#include "fs/virtfs/virtfsrwops.h"

#include "logger.h"

#include "fs/virtfs/file.h"
#include "fs/virtfs/virtfs.h"
#include "fs/virtfs/virtfsfuncs.h"

#include "utils/fuzzer.h"

#include <SDL_rwops.h>

#include "debug.h"

namespace VirtFs
{

SDL_RWops *create_rwops(File *const file)
{
    SDL_RWops *retval = nullptr;

    if (!file)
    {
        logger->assertLog("VirtFs::rwops_seek: create rwops error.");
    }
    else
    {
        retval = SDL_AllocRW();
        if (retval)
        {
#ifdef USE_SDL2
            retval->size  = file->funcs->rwops_size;
#endif  // USE_SDL2

            retval->seek  = file->funcs->rwops_seek;
            retval->read  = file->funcs->rwops_read;
            retval->write = file->funcs->rwops_write;
            retval->close = file->funcs->rwops_close;
            retval->hidden.unknown.data1 = file;
        } /* if */
    } /* else */

    return retval;
} /* VirtFs::create_rwops */

#ifdef __APPLE__
static bool checkFilePath(const std::string &restrict fname)
{
    if (fname.empty())
        return false;
    if (!exists(fname) || isDirectory(fname))
        return false;
    return true;
}
#endif  // __APPLE__

SDL_RWops *rwopsOpenRead(const std::string &restrict fname)
{
    BLOCK_START("RWopsopenRead")
#ifdef __APPLE__
    if (!checkFilePath(fname))
        return nullptr;
#endif  // __APPLE__
#ifdef USE_FUZZER
    if (Fuzzer::conditionTerminate(fname))
        return nullptr;
#endif  // USE_FUZZER
#ifdef USE_PROFILER

    SDL_RWops *const ret = create_rwops(openRead(fname));

    BLOCK_END("RWopsopenRead")
    return ret;
#else  // USE_PROFILER

    return create_rwops(openRead(fname));
#endif  // USE_PROFILER
} /* RWopsopenRead */

SDL_RWops *rwopsOpenWrite(const std::string &restrict fname)
{
#ifdef __APPLE__
    if (!checkFilePath(fname))
        return nullptr;
#endif  // __APPLE__

    return create_rwops(openWrite(fname));
} /* RWopsopenWrite */

SDL_RWops *rwopsOpenAppend(const std::string &restrict fname)
{
#ifdef __APPLE__
    if (!checkFilePath(fname))
        return nullptr;
#endif  // __APPLE__

    return create_rwops(openAppend(fname));
} /* RWopsopenAppend */

}  // namespace VirtFs

/* end of virtfsrwops.c ... */