source: trunk/minix/commands/i386/mtools-3.9.7/fat_free.c@ 10

#include "sysincludes.h"
#include "msdos.h"
#include "fsP.h"
#include "mtoolsDirent.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);
}