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QuietUnrar/Carthage/Checkouts/UnrarKit/Libraries/unrar/scantree.cpp

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#include "rar.hpp"
ScanTree::ScanTree(StringList *FileMasks,RECURSE_MODE Recurse,bool GetLinks,SCAN_DIRS GetDirs)
{
ScanTree::FileMasks=FileMasks;
ScanTree::Recurse=Recurse;
ScanTree::GetLinks=GetLinks;
ScanTree::GetDirs=GetDirs;
ScanEntireDisk=false;
FolderWildcards=false;
SetAllMaskDepth=0;
*CurMask=0;
memset(FindStack,0,sizeof(FindStack));
Depth=0;
Errors=0;
*ErrArcName=0;
Cmd=NULL;
ErrDirList=NULL;
ErrDirSpecPathLength=NULL;
}
ScanTree::~ScanTree()
{
for (int I=Depth;I>=0;I--)
if (FindStack[I]!=NULL)
delete FindStack[I];
}
SCAN_CODE ScanTree::GetNext(FindData *FD)
{
if (Depth<0)
return SCAN_DONE;
#ifndef SILENT
uint LoopCount=0;
#endif
SCAN_CODE FindCode;
while (1)
{
if (*CurMask==0 && !GetNextMask())
return SCAN_DONE;
#ifndef SILENT
// Let's return some ticks to system or WinRAR can become irresponsible
// while scanning files in command like "winrar a -r arc c:\file.ext".
// Also we reset system sleep timer here.
if ((++LoopCount & 0x3ff)==0)
Wait();
#endif
FindCode=FindProc(FD);
if (FindCode==SCAN_ERROR)
{
Errors++;
continue;
}
if (FindCode==SCAN_NEXT)
continue;
if (FindCode==SCAN_SUCCESS && FD->IsDir && GetDirs==SCAN_SKIPDIRS)
continue;
if (FindCode==SCAN_DONE && GetNextMask())
continue;
if (FilterList.ItemsCount()>0 && FindCode==SCAN_SUCCESS)
if (!CommandData::CheckArgs(&FilterList,FD->IsDir,FD->Name,false,MATCH_WILDSUBPATH))
continue;
break;
}
return FindCode;
}
// For masks like dir1\dir2*\*.ext in non-recursive mode.
bool ScanTree::ExpandFolderMask()
{
bool WildcardFound=false;
uint SlashPos=0;
for (int I=0;CurMask[I]!=0;I++)
{
if (CurMask[I]=='?' || CurMask[I]=='*')
WildcardFound=true;
if (WildcardFound && IsPathDiv(CurMask[I]))
{
// First path separator position after folder wildcard mask.
// In case of dir1\dir2*\dir3\name.ext mask it may point not to file
// name, so we cannot use PointToName() here.
SlashPos=I;
break;
}
}
wchar Mask[NM];
wcsncpyz(Mask,CurMask,ASIZE(Mask));
Mask[SlashPos]=0;
// Prepare the list of all folders matching the wildcard mask.
ExpandedFolderList.Reset();
FindFile Find;
Find.SetMask(Mask);
FindData FD;
while (Find.Next(&FD))
if (FD.IsDir)
{
wcsncatz(FD.Name,CurMask+SlashPos,ASIZE(FD.Name));
// Treat dir*\* or dir*\*.* as dir, so empty 'dir' is also matched
// by such mask. Skipping empty dir with dir*\*.* confused some users.
wchar *LastMask=PointToName(FD.Name);
if (wcscmp(LastMask,L"*")==0 || wcscmp(LastMask,L"*.*")==0)
RemoveNameFromPath(FD.Name);
ExpandedFolderList.AddString(FD.Name);
}
if (ExpandedFolderList.ItemsCount()==0)
return false;
// Return the first matching folder name now.
ExpandedFolderList.GetString(CurMask,ASIZE(CurMask));
return true;
}
// For masks like dir1\dir2*\file.ext this function sets 'dir1' recursive mask
// and '*\dir2*\file.ext' filter. Masks without folder wildcards are
// returned as is.
bool ScanTree::GetFilteredMask()
{
// If we have some matching folders left for non-recursive folder wildcard
// mask, we return it here.
if (ExpandedFolderList.ItemsCount()>0 && ExpandedFolderList.GetString(CurMask,ASIZE(CurMask)))
return true;
FolderWildcards=false;
FilterList.Reset();
if (!FileMasks->GetString(CurMask,ASIZE(CurMask)))
return false;
// Check if folder wildcards present.
bool WildcardFound=false;
uint FolderWildcardCount=0;
uint SlashPos=0;
for (int I=0;CurMask[I]!=0;I++)
{
if (CurMask[I]=='?' || CurMask[I]=='*')
WildcardFound=true;
if (IsPathDiv(CurMask[I]) || IsDriveDiv(CurMask[I]))
{
if (WildcardFound)
{
// Calculate a number of folder wildcards in current mask.
FolderWildcardCount++;
WildcardFound=false;
}
if (FolderWildcardCount==0)
SlashPos=I; // Slash position before first folder wildcard mask.
}
}
if (FolderWildcardCount==0)
return true;
FolderWildcards=true; // Global folder wildcards flag.
// If we have only one folder wildcard component and -r is missing or -r-
// is specified, prepare matching folders in non-recursive mode.
// We assume -r for masks like dir1*\dir2*\file*, because it is complicated
// to fast find them using OS file find API call.
if ((Recurse==RECURSE_NONE || Recurse==RECURSE_DISABLE) && FolderWildcardCount==1)
return ExpandFolderMask();
wchar Filter[NM];
// Convert path\dir*\ to *\dir filter to search for 'dir' in all 'path' subfolders.
wcscpy(Filter,L"*");
AddEndSlash(Filter,ASIZE(Filter));
// SlashPos might point or not point to path separator for masks like 'dir*', '\dir*' or 'd:dir*'
wchar *WildName=IsPathDiv(CurMask[SlashPos]) || IsDriveDiv(CurMask[SlashPos]) ? CurMask+SlashPos+1 : CurMask+SlashPos;
wcsncatz(Filter,WildName,ASIZE(Filter));
// Treat dir*\* or dir*\*.* as dir\, so empty 'dir' is also matched
// by such mask. Skipping empty dir with dir*\*.* confused some users.
wchar *LastMask=PointToName(Filter);
if (wcscmp(LastMask,L"*")==0 || wcscmp(LastMask,L"*.*")==0)
*LastMask=0;
FilterList.AddString(Filter);
bool RelativeDrive=IsDriveDiv(CurMask[SlashPos]);
if (RelativeDrive)
SlashPos++; // Use "d:" instead of "d" for d:* mask.
CurMask[SlashPos]=0;
if (!RelativeDrive) // Keep d: mask as is, not convert to d:\*
{
// We need to append "\*" both for -ep1 to work correctly and to
// convert d:\* masks previously truncated to d: back to original form.
AddEndSlash(CurMask,ASIZE(CurMask));
wcsncatz(CurMask,MASKALL,ASIZE(CurMask));
}
return true;
}
bool ScanTree::GetNextMask()
{
if (!GetFilteredMask())
return false;
#ifdef _WIN_ALL
UnixSlashToDos(CurMask,CurMask,ASIZE(CurMask));
#endif
// We wish to scan entire disk if mask like c:\ is specified
// regardless of recursion mode. Use c:\*.* mask when need to scan only
// the root directory.
ScanEntireDisk=IsDriveLetter(CurMask) && IsPathDiv(CurMask[2]) && CurMask[3]==0;
wchar *Name=PointToName(CurMask);
if (*Name==0)
wcsncatz(CurMask,MASKALL,ASIZE(CurMask));
if (Name[0]=='.' && (Name[1]==0 || Name[1]=='.' && Name[2]==0))
{
AddEndSlash(CurMask,ASIZE(CurMask));
wcsncatz(CurMask,MASKALL,ASIZE(CurMask));
}
SpecPathLength=Name-CurMask;
Depth=0;
wcsncpyz(OrigCurMask,CurMask,ASIZE(OrigCurMask));
return true;
}
SCAN_CODE ScanTree::FindProc(FindData *FD)
{
if (*CurMask==0)
return SCAN_NEXT;
bool FastFindFile=false;
if (FindStack[Depth]==NULL) // No FindFile object for this depth yet.
{
bool Wildcards=IsWildcard(CurMask);
// If we have a file name without wildcards, we can try to use
// FastFind to optimize speed. For example, in Unix it results in
// stat call instead of opendir/readdir/closedir.
bool FindCode=!Wildcards && FindFile::FastFind(CurMask,FD,GetLinks);
// Link check is important for NTFS, where links can have "Directory"
// attribute, but we do not want to recurse to them in "get links" mode.
bool IsDir=FindCode && FD->IsDir && (!GetLinks || !FD->IsLink);
// SearchAll means that we'll use "*" mask for search, so we'll find
// subdirectories and will be able to recurse into them.
// We do not use "*" for directories at any level or for files
// at top level in recursion mode. We always comrpess the entire directory
// if folder wildcard is specified.
bool SearchAll=!IsDir && (Depth>0 || Recurse==RECURSE_ALWAYS ||
FolderWildcards && Recurse!=RECURSE_DISABLE ||
Wildcards && Recurse==RECURSE_WILDCARDS ||
ScanEntireDisk && Recurse!=RECURSE_DISABLE);
if (Depth==0)
SearchAllInRoot=SearchAll;
if (SearchAll || Wildcards)
{
// Create the new FindFile object for wildcard based search.
FindStack[Depth]=new FindFile;
wchar SearchMask[NM];
wcsncpyz(SearchMask,CurMask,ASIZE(SearchMask));
if (SearchAll)
SetName(SearchMask,MASKALL,ASIZE(SearchMask));
FindStack[Depth]->SetMask(SearchMask);
}
else
{
// Either we failed to fast find or we found a file or we found
// a directory in RECURSE_DISABLE mode, so we do not need to scan it.
// We can return here and do not need to process further.
// We need to process further only if we fast found a directory.
if (!FindCode || !IsDir || Recurse==RECURSE_DISABLE)
{
// Return SCAN_SUCCESS if we found a file.
SCAN_CODE RetCode=SCAN_SUCCESS;
if (!FindCode)
{
// Return SCAN_ERROR if problem is more serious than just
// "file not found".
RetCode=FD->Error ? SCAN_ERROR:SCAN_NEXT;
// If we failed to find an object, but our current mask is excluded,
// we skip this object and avoid indicating an error.
if (Cmd!=NULL && Cmd->ExclCheck(CurMask,false,true,true))
RetCode=SCAN_NEXT;
else
{
ErrHandler.OpenErrorMsg(ErrArcName,CurMask);
// User asked to return RARX_NOFILES and not RARX_OPEN here.
ErrHandler.SetErrorCode(RARX_NOFILES);
}
}
// If we searched only for one file or directory in "fast find"
// (without a wildcard) mode, let's set masks to zero,
// so calling function will know that current mask is used
// and next one must be read from mask list for next call.
// It is not necessary for directories, because even in "fast find"
// mode, directory recursing will quit by (Depth < 0) condition,
// which returns SCAN_DONE to calling function.
*CurMask=0;
return RetCode;
}
// We found a directory using only FindFile::FastFind function.
FastFindFile=true;
}
}
if (!FastFindFile && !FindStack[Depth]->Next(FD,GetLinks))
{
// We cannot find anything more in directory either because of
// some error or just as result of all directory entries already read.
bool Error=FD->Error;
if (Error)
ScanError(Error);
wchar DirName[NM];
*DirName=0;
// Going to at least one directory level higher.
delete FindStack[Depth];
FindStack[Depth--]=NULL;
while (Depth>=0 && FindStack[Depth]==NULL)
Depth--;
if (Depth < 0)
{
// Directories scanned both in normal and FastFindFile mode,
// finally exit from scan here, by (Depth < 0) condition.
if (Error)
Errors++;
return SCAN_DONE;
}
wchar *Slash=wcsrchr(CurMask,CPATHDIVIDER);
if (Slash!=NULL)
{
wchar Mask[NM];
wcsncpyz(Mask,Slash,ASIZE(Mask));
if (Depth<SetAllMaskDepth)
wcsncpyz(Mask+1,PointToName(OrigCurMask),ASIZE(Mask)-1);
*Slash=0;
wcsncpyz(DirName,CurMask,ASIZE(DirName));
wchar *PrevSlash=wcsrchr(CurMask,CPATHDIVIDER);
if (PrevSlash==NULL)
wcsncpyz(CurMask,Mask+1,ASIZE(CurMask));
else
{
*(PrevSlash+1)=0;
wcsncatz(CurMask,Mask,ASIZE(CurMask));
}
}
if (GetDirs==SCAN_GETDIRSTWICE &&
FindFile::FastFind(DirName,FD,GetLinks) && FD->IsDir)
{
FD->Flags|=FDDF_SECONDDIR;
return Error ? SCAN_ERROR:SCAN_SUCCESS;
}
return Error ? SCAN_ERROR:SCAN_NEXT;
}
// Link check is required for NTFS links, not for Unix.
if (FD->IsDir && (!GetLinks || !FD->IsLink))
{
// If we found the directory in top (Depth==0) directory
// and if we are not in "fast find" (directory name only as argument)
// or in recurse (SearchAll was set when opening the top directory) mode,
// we do not recurse into this directory. We either return it by itself
// or skip it.
if (!FastFindFile && Depth==0 && !SearchAllInRoot)
return GetDirs==SCAN_GETCURDIRS ? SCAN_SUCCESS:SCAN_NEXT;
// Let's check if directory name is excluded, so we do not waste
// time searching in directory, which will be excluded anyway.
if (Cmd!=NULL && (Cmd->ExclCheck(FD->Name,true,false,false) ||
Cmd->ExclDirByAttr(FD->FileAttr)))
{
// If we are here in "fast find" mode, it means that entire directory
// specified in command line is excluded. Then we need to return
// SCAN_DONE to go to next mask and avoid the infinite loop
// in GetNext() function. Such loop would be possible in case of
// SCAN_NEXT code and "rar a arc dir -xdir" command.
return FastFindFile ? SCAN_DONE:SCAN_NEXT;
}
wchar Mask[NM];
wcsncpyz(Mask,FastFindFile ? MASKALL:PointToName(CurMask),ASIZE(Mask));
wcsncpyz(CurMask,FD->Name,ASIZE(CurMask));
if (wcslen(CurMask)+wcslen(Mask)+1>=NM || Depth>=MAXSCANDEPTH-1)
{
uiMsg(UIERROR_PATHTOOLONG,CurMask,SPATHDIVIDER,Mask);
return SCAN_ERROR;
}
AddEndSlash(CurMask,ASIZE(CurMask));
wcsncatz(CurMask,Mask,ASIZE(CurMask));
Depth++;
// We need to use OrigCurMask for depths less than SetAllMaskDepth
// and "*" for depths equal or larger than SetAllMaskDepth.
// It is important when "fast finding" directories at Depth > 0.
// For example, if current directory is RootFolder and we compress
// the following directories structure:
// RootFolder
// +--Folder1
// | +--Folder2
// | +--Folder3
// +--Folder4
// with 'rar a -r arcname Folder2' command, rar could add not only
// Folder1\Folder2 contents, but also Folder1\Folder3 if we were using
// "*" mask at all levels. We need to use "*" mask inside of Folder2,
// but return to "Folder2" mask when completing scanning Folder2.
// We can rewrite SearchAll expression above to avoid fast finding
// directories at Depth > 0, but then 'rar a -r arcname Folder2'
// will add the empty Folder2 and do not add its contents.
if (FastFindFile)
SetAllMaskDepth=Depth;
}
if (!FastFindFile && !CmpName(CurMask,FD->Name,MATCH_NAMES))
return SCAN_NEXT;
return SCAN_SUCCESS;
}
void ScanTree::ScanError(bool &Error)
{
#ifdef _WIN_ALL
if (Error)
{
// Get attributes of parent folder and do not display an error
// if it is reparse point. We cannot scan contents of standard
// Windows reparse points like "C:\Documents and Settings"
// and we do not want to issue numerous useless errors for them.
// We cannot just check FD->FileAttr here, it can be undefined
// if we process "folder\*" mask or if we process "folder" mask,
// but "folder" is inaccessible.
wchar *Slash=PointToName(CurMask);
if (Slash>CurMask)
{
*(Slash-1)=0;
DWORD Attr=GetFileAttributes(CurMask);
*(Slash-1)=CPATHDIVIDER;
if (Attr!=0xffffffff && (Attr & FILE_ATTRIBUTE_REPARSE_POINT)!=0)
Error=false;
}
// Do not display an error if we cannot scan contents of
// "System Volume Information" folder. Normally it is not accessible.
if (wcsstr(CurMask,L"System Volume Information\\")!=NULL)
Error=false;
}
#endif
if (Error && Cmd!=NULL && Cmd->ExclCheck(CurMask,false,true,true))
Error=false;
if (Error)
{
if (ErrDirList!=NULL)
ErrDirList->AddString(CurMask);
if (ErrDirSpecPathLength!=NULL)
ErrDirSpecPathLength->Push((uint)SpecPathLength);
wchar FullName[NM];
// This conversion works for wildcard masks too.
ConvertNameToFull(CurMask,FullName,ASIZE(FullName));
uiMsg(UIERROR_DIRSCAN,FullName);
ErrHandler.SysErrMsg();
}
}
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