reactos/modules/rosapps/applications/explorer-old/shell/winfs.cpp

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/*
* Copyright 2003, 2004, 2005 Martin Fuchs
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
//
// Explorer clone
//
// winfs.cpp
//
// Martin Fuchs, 23.07.2003
//
#include <precomp.h>
#ifndef _NO_WIN_FS
//#include "winfs.h"
#ifdef BACKUP_READ_IMPLEMENTED
int ScanNTFSStreams(Entry* entry, HANDLE hFile)
{
PVOID ctx = 0;
DWORD read, seek_high;
Entry** pnext = &entry->_down;
int cnt = 0;
for(;;) {
struct NTFS_StreamHdr : public WIN32_STREAM_ID {
WCHAR name_padding[_MAX_FNAME]; // room for reading stream name
} hdr;
if (!BackupRead(hFile, (LPBYTE)&hdr, (LPBYTE)&hdr.cStreamName-(LPBYTE)&hdr, &read, FALSE, FALSE, &ctx) ||
(long)read!=(LPBYTE)&hdr.cStreamName-(LPBYTE)&hdr)
break;
if (hdr.dwStreamId == BACKUP_ALTERNATE_DATA) {
if (hdr.dwStreamNameSize &&
BackupRead(hFile, (LPBYTE)hdr.cStreamName, hdr.dwStreamNameSize, &read, FALSE, FALSE, &ctx) &&
read==hdr.dwStreamNameSize)
{
++cnt;
int l = hdr.dwStreamNameSize / sizeof(WCHAR);
LPCWSTR p = hdr.cStreamName;
LPCWSTR e = hdr.cStreamName + l;
if (l>0 && *p==':') {
++p, --l;
e = p;
while(l>0 && *e!=':')
++e, --l;
l = e - p;
}
Entry* stream_entry = new WinEntry(entry);
memcpy(&stream_entry->_data, &entry->_data, sizeof(WIN32_FIND_DATA));
lstrcpy(stream_entry->_data.cFileName, String(p, l));
stream_entry->_down = NULL;
stream_entry->_expanded = false;
stream_entry->_scanned = false;
stream_entry->_level = entry->_level + 1;
*pnext = stream_entry;
pnext = &stream_entry->_next;
}
}
// jump to the next stream header
if (!BackupSeek(hFile, ~0, ~0, &read, &seek_high, &ctx)) {
DWORD error = GetLastError();
if (error != ERROR_SEEK) {
BackupRead(hFile, 0, 0, &read, TRUE, FALSE, &ctx); // terminate BackupRead() loop
THROW_EXCEPTION(error);
//break;
}
hdr.Size.QuadPart -= read;
hdr.Size.HighPart -= seek_high;
BYTE buffer[4096];
while(hdr.Size.QuadPart > 0) {
if (!BackupRead(hFile, buffer, sizeof(buffer), &read, FALSE, FALSE, &ctx) || read!=sizeof(buffer))
break;
hdr.Size.QuadPart -= read;
}
}
}
if (ctx)
if (!BackupRead(hFile, 0, 0, &read, TRUE, FALSE, &ctx)) // terminate BackupRead() loop
THROW_EXCEPTION(GetLastError());
return cnt;
}
#endif
void WinDirectory::read_directory(int scan_flags)
{
CONTEXT("WinDirectory::read_directory()");
int level = _level + 1;
Entry* first_entry = NULL;
Entry* last = NULL;
Entry* entry;
LPCTSTR path = (LPCTSTR)_path;
TCHAR buffer[MAX_PATH], *pname;
for(pname=buffer; *path; )
*pname++ = *path++;
lstrcpy(pname, TEXT("\\*"));
WIN32_FIND_DATA w32fd;
HANDLE hFind = FindFirstFile(buffer, &w32fd);
if (hFind != INVALID_HANDLE_VALUE) {
do {
lstrcpy(pname+1, w32fd.cFileName);
if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
entry = new WinDirectory(this, buffer);
else
entry = new WinEntry(this);
if (!first_entry)
first_entry = entry;
if (last)
last->_next = entry;
memcpy(&entry->_data, &w32fd, sizeof(WIN32_FIND_DATA));
entry->_level = level;
// display file type names, but don't hide file extensions
g_Globals._ftype_mgr.set_type(entry, true);
if (!(scan_flags & SCAN_DONT_ACCESS)) {
HANDLE hFile = CreateFile(buffer, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
if (hFile != INVALID_HANDLE_VALUE) {
if (GetFileInformationByHandle(hFile, &entry->_bhfi))
entry->_bhfi_valid = true;
#ifdef BACKUP_READ_IMPLEMENTED
if (ScanNTFSStreams(entry, hFile))
entry->_scanned = true; // There exist named NTFS sub-streams in this file.
#endif
CloseHandle(hFile);
}
}
last = entry; // There is always at least one entry, because FindFirstFile() succeeded and we don't filter the file entries.
} while(FindNextFile(hFind, &w32fd));
if (last)
last->_next = NULL;
FindClose(hFind);
}
_down = first_entry;
_scanned = true;
}
const void* WinDirectory::get_next_path_component(const void* p) const
{
LPCTSTR s = (LPCTSTR) p;
while(*s && *s!=TEXT('\\') && *s!=TEXT('/'))
++s;
while(*s==TEXT('\\') || *s==TEXT('/'))
++s;
if (!*s)
return NULL;
return s;
}
Entry* WinDirectory::find_entry(const void* p)
{
LPCTSTR name = (LPCTSTR)p;
for(Entry*entry=_down; entry; entry=entry->_next) {
LPCTSTR p = name;
LPCTSTR q = entry->_data.cFileName;
do {
if (!*p || *p==TEXT('\\') || *p==TEXT('/'))
return entry;
} while(tolower(*p++) == tolower(*q++));
p = name;
q = entry->_data.cAlternateFileName;
do {
if (!*p || *p==TEXT('\\') || *p==TEXT('/'))
return entry;
} while(tolower(*p++) == tolower(*q++));
}
return NULL;
}
// get full path of specified directory entry
bool WinEntry::get_path(PTSTR path, size_t path_count) const
{
return get_path_base(path, path_count, ET_WINDOWS);
}
ShellPath WinEntry::create_absolute_pidl() const
{
CONTEXT("WinEntry::create_absolute_pidl()");
TCHAR path[MAX_PATH];
if (get_path(path, COUNTOF(path)))
return ShellPath(path);
return ShellPath();
}
#endif // _NO_WIN_FS