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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef COMMON_FILE_H
#define COMMON_FILE_H
#include "common/scummsys.h"
#include "common/fs.h"
#include "common/noncopyable.h"
#include "common/str.h"
#include "common/stream.h"
namespace Common {
class Archive;
/**
* TODO: vital to document this core class properly!!! For both users and implementors
*/
class File : public SeekableReadStream, public NonCopyable {
protected:
/** File handle to the actual file; 0 if no file is open. */
SeekableReadStream *_handle;
/** The name of this file, kept for debugging purposes. */
String _name;
public:
File();
virtual ~File();
/**
* Checks if a given file exists in any of the current default paths,
* as defined by SearchMan.
*
* @param filename the file to check for
* @return true if the file exists, false otherwise
*/
static bool exists(const String &filename);
/**
* Try to open the file with the given filename, by searching SearchMan.
* @note Must not be called if this file already is open (i.e. if isOpen returns true).
*
* @param filename the name of the file to open
* @return true if file was opened successfully, false otherwise
*/
virtual bool open(const String &filename);
/**
* Try to open the file with the given filename from within the given archive.
* @note Must not be called if this file already is open (i.e. if isOpen returns true).
*
* @param filename the name of the file to open
* @param archive the archive in which to search for the file
* @return true if file was opened successfully, false otherwise
*/
virtual bool open(const String &filename, Archive &archive);
/**
* Try to open the file corresponding to the give node. Will check whether the
* node actually refers to an existing file (and not a directory), and handle
* those cases gracefully.
* @note Must not be called if this file already is open (i.e. if isOpen returns true).
*
* @param filename the name of the file to open
* @param archive the archive in which to search for the file
* @return true if file was opened successfully, false otherwise
*/
virtual bool open(const FSNode &node);
/**
* Try to 'open' the given stream. That is, we just wrap around it, and if stream
* is a NULL pointer, we gracefully treat this as if opening failed.
* @note Must not be called if this file already is open (i.e. if isOpen returns true).
*
* @param stream a pointer to a SeekableReadStream, or 0
* @param name a string describing the 'file' corresponding to stream
* @return true if stream was non-zero, false otherwise
*/
virtual bool open(SeekableReadStream *stream, const String &name);
/**
* Close the file, if open.
*/
virtual void close();
/**
* Checks if the object opened a file successfully.
*
* @return: true if any file is opened, false otherwise.
*/
bool isOpen() const;
/**
* Returns the filename of the opened file for debugging purposes.
*
* @return: the filename
*/
const char *getName() const { return _name.c_str(); }
bool err() const; // implement abstract Stream method
void clearErr(); // implement abstract Stream method
bool eos() const; // implement abstract SeekableReadStream method
int32 pos() const; // implement abstract SeekableReadStream method
int32 size() const; // implement abstract SeekableReadStream method
bool seek(int32 offs, int whence = SEEK_SET); // implement abstract SeekableReadStream method
uint32 read(void *dataPtr, uint32 dataSize); // implement abstract SeekableReadStream method
};
/**
* TODO: document this class
*
* Some design ideas:
* - automatically drop all files into dumps/ dir? Might not be desired in all cases
*/
class DumpFile : public WriteStream, public NonCopyable {
protected:
/** File handle to the actual file; 0 if no file is open. */
WriteStream *_handle;
public:
DumpFile();
virtual ~DumpFile();
virtual bool open(const String &filename);
virtual bool open(const FSNode &node);
virtual void close();
/**
* Checks if the object opened a file successfully.
*
* @return: true if any file is opened, false otherwise.
*/
bool isOpen() const;
bool err() const;
void clearErr();
virtual uint32 write(const void *dataPtr, uint32 dataSize);
virtual bool flush();
};
} // End of namespace Common
#endif
|
