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/* Copyright 1986-1992 Emmet P. Gray.
* Copyright 1996-1998,2001,2002,2009 Alain Knaff.
* This file is part of mtools.
*
* Mtools 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 3 of the License, or
* (at your option) any later version.
*
* Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sysincludes.h"
#include "msdos.h"
#include "fsP.h"
#include "mtoolsDirentry.h"
/*
* Remove a string of FAT entries (delete the file). The argument is
* the beginning of the string. Does not consider the file length, so
* if FAT is corrupted, watch out!
*/
int fat_free(Stream_t *Dir, unsigned int fat)
{
Stream_t *Stream = GetFs(Dir);
DeclareThis(Fs_t);
unsigned int next_no_step;
/* a zero length file? */
if (fat == 0)
return(0);
/* CONSTCOND */
while (!This->fat_error) {
/* get next cluster number */
next_no_step = fatDecode(This,fat);
/* mark current cluster as empty */
fatDeallocate(This,fat);
if (next_no_step >= This->last_fat)
break;
fat = next_no_step;
}
return(0);
}
int fatFreeWithDir(Stream_t *Dir, struct directory *dir)
{
unsigned int first;
if((!strncmp(dir->name,". ",8) ||
!strncmp(dir->name,".. ",8)) &&
!strncmp(dir->ext," ",3)) {
fprintf(stderr,"Trying to remove . or .. entry\n");
return -1;
}
first = START(dir);
if(fat32RootCluster(Dir))
first |= STARTHI(dir) << 16;
return fat_free(Dir, first);
}
int fatFreeWithDirentry(direntry_t *entry)
{
return fatFreeWithDir(entry->Dir, &entry->dir);
}
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