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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2005-2006 Neil Millstone
* Copyright (C) 2006 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include "stdafx.h"
#include "zipreader.h"
#define SWAP_U16(v) (((v & 0xFF) << 8) + (v & 0xFF00))
#define SWAP_U32(v) ((SWAP_U16((v & 0XFFFF0000) >> 16) + (SWAP_U16(v & 0x0000FFFF) << 16)))
ZipFile::ZipFile() {
// Locate a zip file in cartridge memory space
consolePrintf("ZIP file check...");
char* p = (char *) ZF_SEARCH_START;
bool found = false;
_zipFile = NULL;
while ((p != (char *) ZF_SEARCH_END) && (!found)) {
// Zip file header is: 0x504B0304
if ( (*p == 0x50) && (*(p + 1) == 0x4B) && (*(p + 2) == 0x03) && (*(p + 3) == 0x04) ) {
// Found header!
found = true;
_zipFile = p;
}
if (!found) p += ZF_SEARCH_STRIDE;
}
if (_zipFile) {
consolePrintf("Ok!\n");
} else {
consolePrintf("Not in use!\n");
return;
}
changeToRoot();
restartFile();
if (_currentFile->compSize != (u32) getFileSize()) {
consolePrintf("Error: ZIP file contains compression!\n");
}
_allFilesVisible = false;
}
bool ZipFile::isReady() {
return _zipFile != NULL;
}
bool ZipFile::restartFile() {
_currentFile = (FileHeader *) _zipFile;
char name[128];
getFileName(name);
bool more = true;
while (!currentFileInFolder() && more) {
char name[128];
getFileName(name);
more = skipFile();
}
return more;
}
bool ZipFile::currentFileInFolder() {
char name[128];
if (_allFilesVisible) return true;
getFileName(name);
if (_directory[0] == 0) { // Root directory
name[strlen(name) - 1] = 0;
return !strchr(name, '\\'); // Not in root if contains a / character before the last character
} else {
/* if (name starts with directory && it's not the directory
&& (no slashes after the directory || it's the last character)
&& (slash follows directory)
*/
if ((strstr(name, _directory) == name) && (strlen(name) != strlen(_directory))
&& ((strchr(name + strlen(_directory) + 1, '\\') == NULL)
|| (strchr(name + strlen(_directory) + 1, '\\') == name + strlen(name) - 1))
&& (*(name + strlen(_directory)) == '\\')) {
return true;
}
}
return false;
}
void ZipFile::getFileName(char* name) {
strncpy(name, (char *) (_currentFile + 1), _currentFile->nameLength);
for (int r = 0; r < (int) strlen(name); r++) {
if (name[r] == '/') name[r] = '\\';
}
name[_currentFile->nameLength] = 0;
if (name[strlen(name) - 1] == '\\') {
name[strlen(name) - 1] = 0;
}
}
bool ZipFile::skipFile() {
bool valid;
do {
// Move on to the next file
_currentFile = (FileHeader *) (
((char *) (_currentFile)) + sizeof(*_currentFile) + _currentFile->nameLength + _currentFile->fileSize + _currentFile->extraLength
);
// Return true if there are more files. Check this by looking for the magic number
valid = (_currentFile->magic[0] == 0x50) &&
(_currentFile->magic[1] == 0x4B) &&
(_currentFile->magic[2] == 0x03) &&
(_currentFile->magic[3] == 0x04);
} while (valid && !currentFileInFolder());
return valid;
// Currently doesn't handle data descriptors!
}
u32 ZipFile::misaligned32(u32* v) {
char* b = (char *) v;
return (b[0] << 24) + (b[1] << 16) + (b[2] << 8) + b[3];
}
u16 ZipFile::misaligned16(u16* v) {
char* b = (char *) v;
return (b[0] << 8) + b[1];
}
int ZipFile::getFileSize() {
return _currentFile->fileSize;
}
bool ZipFile::isDirectory() {
return _currentFile->fileSize == 0; // This is a bit wrong, but seems to work.
}
char* ZipFile::getFile() {
return ((char *) (_currentFile)) + sizeof(*_currentFile) + _currentFile->nameLength + _currentFile->extraLength;
}
bool ZipFile::findFile(char* search) {
changeToRoot();
restartFile();
char searchName[128];
strcpy(searchName, search);
for (int r = 0; r < (int) strlen(searchName); r++) {
if (searchName[r] == '/') searchName[r] = '\\';
}
if (*(searchName + strlen(searchName) - 1) == '\\') { // Directories have a terminating slash
*(searchName + strlen(searchName) - 1) = '\0'; // which we need to dispose of.
}
do {
char name[128];
getFileName(name);
if (*(name + strlen(name) - 1) == '\\') { // Directories have a terminating slash
*(name + strlen(name) - 1) = '\0'; // which we need to dispose of.
}
if (!stricmp(name, searchName)) {
// consolePrintf("'%s'=='%s'\n", name, searchName);
return true; // Got it!
} else {
// consolePrintf("'%s'!='%s'\n", name, searchName);
}
} while (skipFile());
return false; // File wasn't found
}
void ZipFile::changeToRoot() {
_directory[0] = 0;
}
void ZipFile::changeDirectory(char* dir) {
// consolePrintf("Current dir now '%s'\n", dir);
strcpy(_directory, dir);
}
ZipFile::~ZipFile() {
}
|
