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/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#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("ZIP File found 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);
// consolePrintf("N:'%s'D:'%s'\n", name, _directory);
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);
for (int r = 0; r < (int) strlen(_directory); r++) {
if (_directory[r] == '/') _directory[r] = '\\';
}
if (_directory[strlen(_directory) - 1] == '\\') {
_directory[strlen(_directory) - 1] = '\0';
}
}
ZipFile::~ZipFile() {
}
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