+ /* orientate */
+ pffs_orientate(pffs);
+
+ return 0;
+}
+
+#define pffs_check_magic(data) (((data)&PFFS_INDEX_MAGIC_MASK)==PFFS_INDEX_MAGIC)
+#define pffs_fnlen(data) (((data)&PFFS_FNLEN_MASK)>>4)
+#define pffs_daddr_msb(data) (((data)&))
+
+int pffs_find_file(t_pffs *pffs,char *file,u32 *iaddr,u32 *daddr,u16 *len) {
+
+ u8 fnl;
+ u16 data[PFFS_MAX_FILENAME_SIZE+PFFS_HEADER_SIZE];
+
+ pffs->index_ptr[2]=pffs->base_addr|pffs->index_ptr[0];
+
+ while(pffs->index_ptr[2]<pffs->index_ptr[1])
+ pffs->fr(iaddr,data,3);
+
+ if(!pffs_check_magic(data[0]))
+ break;
+
+ fnl=pffs_fnlen(data[0]);
+ pffs->fr(iaddr+6,data+3,fnl+fnl);
+
+ if(!strncmp(fd->file,(char *)(data+3),fnl+fnl)) {
+ *daddr=((data[0]&0x000f)<<16)|data[1];
+ *len=data[2];
+ pffs->index_ptr[2]=*iaddr;
+ return PFFS_FILE_EXISTS;
+ }
+ pffs->fr(iaddr,data,3);
+ }
+
+ return PFFS_FILE_NOT_FOUND;
+}
+
+int pffs_open_read(t_pffs *pffs,t_pffs_fd *fd) {
+
+ u32 iaddr;
+ u32 daddr;
+ u16 data[PFFS_MAX_FILENAME+PFFS_HEADER_SIZE];
+
+ iaddr=pffs->base_addr|pffs->index_ptr[0];
+
+ return 0x23;
+}
+
+int pffs_open(t_pffs *pffs,t_pffs_fd *fd,char *file,u8 mode) {
+
+ /* the pffs struct */
+ fd->pffs=pffs;
+
+ /* filename */
+ fd->fn_size=strlen(file);
+ if(fd->fn_size>30)
+ return PFFS_FILENAME_TOO_LONG;
+ strncpy(fd->file,file,fd->fn_size);
+ if(fd->fn_size&1)
+ fd->file[fd->fn_size++]='\0';
+
+ /* mode */
+ fd->mode=mode;
+
+ /* action */
+ switch(mode) {
+ case PFFS_READ:
+ pffs_open_read(pffs,fd);
+ break;
+ case PFFS_WRITE:
+ break;
+ case PFFS_RDWR:
+ default:
+ return PFFS_MODE_UNSUPPORTED;
+ }
+