56 lines
1.2 KiB
C
Executable File
56 lines
1.2 KiB
C
Executable File
#include "sysincludes.h"
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#include "msdos.h"
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#include "fsP.h"
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#include "mtoolsDirent.h"
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/*
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* Remove a string of FAT entries (delete the file). The argument is
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* the beginning of the string. Does not consider the file length, so
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* if FAT is corrupted, watch out!
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*/
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int fat_free(Stream_t *Dir, unsigned int fat)
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{
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Stream_t *Stream = GetFs(Dir);
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DeclareThis(Fs_t);
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unsigned int next_no_step;
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/* a zero length file? */
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if (fat == 0)
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return(0);
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/* CONSTCOND */
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while (!This->fat_error) {
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/* get next cluster number */
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next_no_step = fatDecode(This,fat);
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/* mark current cluster as empty */
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fatDeallocate(This,fat);
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if (next_no_step >= This->last_fat)
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break;
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fat = next_no_step;
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}
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return(0);
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}
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int fatFreeWithDir(Stream_t *Dir, struct directory *dir)
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{
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unsigned int first;
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if((!strncmp(dir->name,". ",8) ||
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!strncmp(dir->name,".. ",8)) &&
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!strncmp(dir->ext," ",3)) {
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fprintf(stderr,"Trying to remove . or .. entry\n");
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return -1;
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}
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first = START(dir);
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if(fat32RootCluster(Dir))
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first |= STARTHI(dir) << 16;
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return fat_free(Dir, first);
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}
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int fatFreeWithDirentry(direntry_t *entry)
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{
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return fatFreeWithDir(entry->Dir, &entry->dir);
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}
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