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
|
// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
fileio.h
Core file I/O interface functions and definitions.
***************************************************************************/
#pragma once
#ifndef __FILEIO_H__
#define __FILEIO_H__
#include "corefile.h"
#include "hash.h"
// some systems use macros for getc/putc rather than functions
#ifdef getc
#undef getc
#endif
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// forward declarations
struct zip_file_header;
struct zip_file;
struct _7z_file_header;
struct _7z_file;
// ======================> path_iterator
// helper class for iterating over configured paths
class path_iterator
{
public:
// construction/destruction
path_iterator(const char *searchpath);
// getters
bool next(astring &buffer, const char *name = NULL);
// reset
void reset() { m_current = m_base; m_index = 0; }
private:
// internal state
const char * m_base;
const char * m_current;
int m_index;
};
// ======================> file_enumerator
// iterate over all files in all paths specified in the searchpath
class file_enumerator
{
public:
// construction/destruction
file_enumerator(const char *searchpath);
~file_enumerator();
// iterator
const osd_directory_entry *next();
private:
// internal state
path_iterator m_iterator;
osd_directory * m_curdir;
astring m_pathbuffer;
//int m_buflen;
};
// ======================> emu_file
class emu_file
{
public:
// file open/creation
emu_file(UINT32 openflags);
emu_file(const char *searchpath, UINT32 openflags);
virtual ~emu_file();
// getters
operator core_file *();
operator core_file &();
bool is_open() const { return (m_file != NULL); }
const char *filename() const { return m_filename; }
const char *fullpath() const { return m_fullpath; }
UINT32 openflags() const { return m_openflags; }
hash_collection &hashes(const char *types);
// setters
void remove_on_close() { m_remove_on_close = true; }
void set_openflags(UINT32 openflags) { assert(m_file == NULL); m_openflags = openflags; }
// open/close
file_error open(const char *name);
file_error open(const char *name1, const char *name2);
file_error open(const char *name1, const char *name2, const char *name3);
file_error open(const char *name1, const char *name2, const char *name3, const char *name4);
file_error open(const char *name, UINT32 crc);
file_error open(const char *name1, const char *name2, UINT32 crc);
file_error open(const char *name1, const char *name2, const char *name3, UINT32 crc);
file_error open(const char *name1, const char *name2, const char *name3, const char *name4, UINT32 crc);
file_error open_next();
file_error open_ram(const void *data, UINT32 length);
void close();
// control
file_error compress(int compress);
int seek(INT64 offset, int whence);
UINT64 tell();
bool eof();
UINT64 size();
// reading
UINT32 read(void *buffer, UINT32 length);
int getc();
int ungetc(int c);
char *gets(char *s, int n);
// writing
UINT32 write(const void *buffer, UINT32 length);
int puts(const char *s);
int vprintf(const char *fmt, va_list va);
int printf(const char *fmt, ...) ATTR_PRINTF(2,3);
private:
bool compressed_file_ready(void);
// internal helpers
file_error attempt_zipped();
file_error load_zipped_file();
bool zip_filename_match(const zip_file_header &header, const astring &filename);
bool zip_header_is_path(const zip_file_header &header);
file_error attempt__7zped();
file_error load__7zped_file();
// internal state
astring m_filename; // original filename provided
astring m_fullpath; // full filename
core_file * m_file; // core file pointer
path_iterator m_iterator; // iterator for paths
UINT32 m_crc; // iterator for paths
UINT32 m_openflags; // flags we used for the open
hash_collection m_hashes; // collection of hashes
zip_file * m_zipfile; // ZIP file pointer
UINT8 * m_zipdata; // ZIP file data
UINT64 m_ziplength; // ZIP file length
_7z_file * m__7zfile; // 7Z file pointer
UINT8 * m__7zdata; // 7Z file data
UINT64 m__7zlength; // 7Z file length
bool m_remove_on_close; // flag: remove the file when closing
};
#endif /* __FILEIO_H__ */
|