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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/*
* 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/>.
*/
#include "fs/virtfs/fsdirrwops.h"
#include "logger.h"
#include "fs/virtfs/file.h"
#include <SDL_rwops.h>
#include "debug.h"
namespace VirtFs
{
namespace FsDir
{
RWOPSINT rwops_seek(SDL_RWops *const rw,
const RWOPSINT offset,
const int whence)
{
if (!rw)
return -1;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
FILEHTYPE fd = handle->mFd;
RWOPSINT pos = 0;
if (whence == SEEK_SET)
{
pos = offset;
}
else if (whence == SEEK_CUR)
{
#ifdef USE_FILE_FOPEN
const int64_t current = ftell(fd);
#else // USE_FILE_FOPEN
const int64_t current = lseek(fd, 0, SEEK_CUR);
#endif // USE_FILE_FOPEN
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)
{
int64_t len = 0;
#ifdef USE_FILE_FOPEN
const long curpos = ftell(fd);
fseek(fd, 0, SEEK_END);
len = ftell(fd);
// fseek(fd, curpos, SEEK_SET);
#else // USE_FILE_FOPEN
struct stat statbuf;
if (fstat(fd, &statbuf) == -1)
{
reportAlways("FsDir::fileLength error.");
len = -1;
}
else
{
len = static_cast<int64_t>(statbuf.st_size);
}
#endif // USE_FILE_FOPEN
if (len == -1)
{
#ifdef USE_FILE_FOPEN
fseek(fd, curpos, SEEK_SET);
#endif // USE_FILE_FOPEN
logger->assertLog(
"VirtFs::rwops_seek:Can't find end of file.");
return -1;
}
pos = static_cast<RWOPSINT>(len);
if (static_cast<int64_t>(pos) != len)
{
#ifdef USE_FILE_FOPEN
fseek(fd, curpos, SEEK_SET);
#endif // USE_FILE_FOPEN
logger->assertLog("VirtFs::rwops_seek: "
"Can't fit end-of-file position in an int!");
return -1;
}
pos += 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;
}
const int64_t res = FILESEEK(fd, pos, SEEK_SET);
if (res == -1)
{
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)
return 0;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
FILEHTYPE fd = handle->mFd;
#ifdef USE_FILE_FOPEN
const int64_t rc = fread(ptr, size, maxnum, fd);
#else // USE_FILE_FOPEN
int max = size * maxnum;
int cnt = ::read(fd, ptr, max);
if (cnt <= 0)
return cnt;
const int64_t rc = cnt / size;
#endif // USE_FILE_FOPEN
if (rc != static_cast<int64_t>(maxnum))
{
#ifndef USE_FILE_FOPEN
const int64_t pos = lseek(fd, 0, SEEK_CUR);
struct stat statbuf;
if (fstat(fd, &statbuf) == -1)
{
reportAlways("FsDir::fileLength error.");
return CAST_S32(rc);
}
#endif // USE_FILE_FOPEN
}
return CAST_S32(rc);
}
RWOPSSIZE rwops_write(SDL_RWops *const rw,
const void *const ptr,
const RWOPSSIZE size,
const RWOPSSIZE maxnum)
{
if (!rw)
return 0;
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
FILEHTYPE fd = handle->mFd;
#ifdef USE_FILE_FOPEN
const int64_t rc = fwrite(ptr, size, maxnum, fd);
#else // USE_FILE_FOPEN
int max = size * maxnum;
int cnt = ::write(fd, ptr, max);
if (cnt <= 0)
return cnt;
const int64_t rc = cnt / size;
#endif // USE_FILE_FOPEN
if (rc != static_cast<int64_t>(maxnum))
{
#ifndef USE_FILE_FOPEN
const int64_t pos = lseek(fd, 0, SEEK_CUR);
struct stat statbuf;
if (fstat(fd, &statbuf) == -1)
{
reportAlways("FsDir::fileLength error.");
return CAST_S32(rc);
}
#endif // USE_FILE_FOPEN
}
return CAST_S32(rc);
}
int rwops_close(SDL_RWops *const rw)
{
if (!rw)
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)
{
File *const handle = static_cast<File *>(
rw->hidden.unknown.data1);
FILEHTYPE fd = handle->mFd;
#ifdef USE_FILE_FOPEN
const long pos = ftell(fd);
fseek(fd, 0, SEEK_END);
const long sz = ftell(fd);
fseek(fd, pos, SEEK_SET);
return sz;
#else // USE_FILE_FOPEN
struct stat statbuf;
if (fstat(fd, &statbuf) == -1)
{
reportAlways("FsDir::fileLength error.");
return -1;
}
return static_cast<int64_t>(statbuf.st_size);
#endif // USE_FILE_FOPEN
}
#endif // USE_SDL2
} // namespace FsDir
} // namespace VirtFs
|
