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#include "sysincludes.h"
#include "msdos.h"
#include "fsP.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 (1) {
/* get next cluster number */
next_no_step = This->fat_decode(This,fat);
/* mark current cluster as empty */
if (This->fat_encode(This,fat, 0) || next_no_step == 1) {
fprintf(stderr, "fat_free: FAT problem %d %d\n",
fat,next_no_step);
This->fat_error++;
return(-1);
}
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);
}
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