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#include "rar.hpp"
bool FileCreate(RAROptions *Cmd,File *NewFile,char *Name,wchar *NameW,
OVERWRITE_MODE Mode,bool *UserReject,int64 FileSize,
uint FileTime,bool WriteOnly)
{
if (UserReject!=NULL)
*UserReject=false;
#if defined(_WIN_ALL) && !defined(_WIN_CE)
bool ShortNameChanged=false;
#endif
while (FileExist(Name,NameW))
{
#if defined(_WIN_ALL) && !defined(_WIN_CE)
if (!ShortNameChanged)
{
// Avoid the infinite loop if UpdateExistingShortName returns
// the same name.
ShortNameChanged=true;
// Maybe our long name matches the short name of existing file.
// Let's check if we can change the short name.
wchar WideName[NM];
GetWideName(Name,NameW,WideName,ASIZE(WideName));
if (UpdateExistingShortName(WideName))
{
if (Name!=NULL && *Name!=0)
WideToChar(WideName,Name);
if (NameW!=NULL && *NameW!=0)
wcscpy(NameW,WideName);
continue;
}
}
// Allow short name check again. It is necessary, because rename and
// autorename below can change the name, so we need to check it again.
ShortNameChanged=false;
#endif
if (Mode==OVERWRITE_NONE)
{
if (UserReject!=NULL)
*UserReject=true;
return(false);
}
// Must be before Cmd->AllYes check or -y switch would override -or.
if (Mode==OVERWRITE_AUTORENAME)
{
if (!GetAutoRenamedName(Name,NameW))
Mode=OVERWRITE_DEFAULT;
continue;
}
#ifdef SILENT
Mode=OVERWRITE_ALL;
#endif
// This check must be after OVERWRITE_AUTORENAME processing or -y switch
// would override -or.
if (Cmd->AllYes || Mode==OVERWRITE_ALL)
break;
if (Mode==OVERWRITE_DEFAULT || Mode==OVERWRITE_FORCE_ASK)
{
char NewName[NM];
wchar NewNameW[NM];
*NewNameW=0;
eprintf(St(MFileExists),Name);
int Choice=Ask(St(MYesNoAllRenQ));
if (Choice==1)
break;
if (Choice==2)
{
if (UserReject!=NULL)
*UserReject=true;
return(false);
}
if (Choice==3)
{
Cmd->Overwrite=OVERWRITE_ALL;
break;
}
if (Choice==4)
{
if (UserReject!=NULL)
*UserReject=true;
Cmd->Overwrite=OVERWRITE_NONE;
return(false);
}
if (Choice==5)
{
#ifndef GUI
mprintf(St(MAskNewName));
#ifdef _WIN_ALL
File SrcFile;
SrcFile.SetHandleType(FILE_HANDLESTD);
int Size=SrcFile.Read(NewName,sizeof(NewName)-1);
NewName[Size]=0;
OemToCharA(NewName,NewName);
#else
if (fgets(NewName,sizeof(NewName),stdin)==NULL)
{
// Process fgets failure as if user answered 'No'.
if (UserReject!=NULL)
*UserReject=true;
return(false);
}
#endif
RemoveLF(NewName);
#endif
if (PointToName(NewName)==NewName)
strcpy(PointToName(Name),NewName);
else
strcpy(Name,NewName);
if (NameW!=NULL)
if (PointToName(NewNameW)==NewNameW)
wcscpy(PointToName(NameW),NewNameW);
else
wcscpy(NameW,NewNameW);
continue;
}
if (Choice==6)
ErrHandler.Exit(RARX_USERBREAK);
}
}
uint FileMode=WriteOnly ? FMF_WRITE|FMF_SHAREREAD:FMF_UPDATE|FMF_SHAREREAD;
if (NewFile!=NULL && NewFile->Create(Name,NameW,FileMode))
return(true);
PrepareToDelete(Name,NameW);
CreatePath(Name,NameW,true);
return(NewFile!=NULL ? NewFile->Create(Name,NameW,FileMode):DelFile(Name,NameW));
}
bool GetAutoRenamedName(char *Name,wchar *NameW)
{
char NewName[NM];
wchar NewNameW[NM];
if (Name!=NULL && strlen(Name)>ASIZE(NewName)-10 ||
NameW!=NULL && wcslen(NameW)>ASIZE(NewNameW)-10)
return(false);
char *Ext=NULL;
if (Name!=NULL && *Name!=0)
{
Ext=GetExt(Name);
if (Ext==NULL)
Ext=Name+strlen(Name);
}
wchar *ExtW=NULL;
if (NameW!=NULL && *NameW!=0)
{
ExtW=GetExt(NameW);
if (ExtW==NULL)
ExtW=NameW+wcslen(NameW);
}
*NewName=0;
*NewNameW=0;
for (int FileVer=1;;FileVer++)
{
if (Name!=NULL && *Name!=0)
sprintf(NewName,"%.*s(%d)%s",int(Ext-Name),Name,FileVer,Ext);
if (NameW!=NULL && *NameW!=0)
sprintfw(NewNameW,ASIZE(NewNameW),L"%.*s(%d)%s",int(ExtW-NameW),NameW,FileVer,ExtW);
if (!FileExist(NewName,NewNameW))
{
if (Name!=NULL && *Name!=0)
strcpy(Name,NewName);
if (NameW!=NULL && *NameW!=0)
wcscpy(NameW,NewNameW);
break;
}
if (FileVer>=1000000)
return(false);
}
return(true);
}
#if defined(_WIN_ALL) && !defined(_WIN_CE)
// If we find a file, which short name is equal to 'Name', we try to change
// its short name, while preserving the long name. It helps when unpacking
// an archived file, which long name is equal to short name of already
// existing file. Otherwise we would overwrite the already existing file,
// even though its long name does not match the name of unpacking file.
bool UpdateExistingShortName(wchar *Name)
{
// 'Name' is the name of file which we want to create. Let's check
// if file with such name is exist. If it does not, we return.
FindData fd;
if (!FindFile::FastFind(NULL,Name,&fd))
return(false);
// We continue only if file has a short name, which does not match its
// long name, and this short name is equal to name of file which we need
// to create.
if (*fd.ShortName==0 || wcsicomp(PointToName(fd.NameW),fd.ShortName)==0 ||
wcsicomp(PointToName(Name),fd.ShortName)!=0)
return(false);
// Generate the temporary new name for existing file.
wchar NewName[NM];
*NewName=0;
for (int I=0;I<10000 && *NewName==0;I+=123)
{
// Here we copy the path part of file to create. We'll make the temporary
// file in the same folder.
wcsncpyz(NewName,Name,ASIZE(NewName));
// Here we set the random name part.
sprintfw(PointToName(NewName),ASIZE(NewName),L"rtmp%d",I);
// If such file is already exist, try next random name.
if (FileExist(NULL,NewName))
*NewName=0;
}
// If we could not generate the name not used by any other file, we return.
if (*NewName==0)
return(false);
// FastFind returns the name without path, but we need the fully qualified
// name for renaming, so we use the path from file to create and long name
// from existing file.
wchar FullName[NM];
wcsncpyz(FullName,Name,ASIZE(FullName));
wcscpy(PointToName(FullName),PointToName(fd.NameW));
// Rename the existing file to randomly generated name. Normally it changes
// the short name too.
if (!MoveFileW(FullName,NewName))
return(false);
// Now we need to create the temporary empty file with same name as
// short name of our already existing file. We do it to occupy its previous
// short name and not allow to use it again when renaming the file back to
// its original long name.
File KeepShortFile;
bool Created=false;
if (!FileExist(NULL,Name))
Created=KeepShortFile.Create(NULL,Name);
// Now we rename the existing file from temporary name to original long name.
// Since its previous short name is occupied by another file, it should
// get another short name.
MoveFileW(NewName,FullName);
if (Created)
{
// Delete the temporary zero length file occupying the short name,
KeepShortFile.Close();
KeepShortFile.Delete();
}
// We successfully changed the short name. Maybe sometimes we'll simplify
// this function by use of SetFileShortName Windows API call.
// But SetFileShortName is not available in older Windows.
return(true);
}
#endif
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