| 108,11 → 108,14 |
|---|
| * |
| * @param dev_handle Device handle of the device with the file. |
| * @param firstc First cluster of the file. |
| * @param lastc If non-NULL, output argument holding the |
| * last cluster. |
| * |
| * @return Number of blocks allocated to the file. |
| */ |
| uint16_t |
| _fat_blcks_get(dev_handle_t dev_handle, fat_cluster_t firstc) |
| _fat_blcks_get(dev_handle_t dev_handle, fat_cluster_t firstc, |
| fat_cluster_t *lastc) |
| { |
| block_t *bb; |
| block_t *b; |
| 130,6 → 133,8 |
|---|
| |
| if (firstc == FAT_CLST_RES0) { |
| /* No space allocated to the file. */ |
| if (lastc) |
| *lastc = firstc; |
| return 0; |
| } |
| |
| 138,6 → 143,8 |
|---|
| unsigned fidx; /* FAT1 entry index */ |
| |
| assert(clst >= FAT_CLST_FIRST); |
| if (lastc) |
| *lastc = clst; /* remember the last cluster */ |
| fsec = (clst * sizeof(fat_cluster_t)) / bps; |
| fidx = clst % (bps / sizeof(fat_cluster_t)); |
| /* read FAT1 */ |
| 148,6 → 155,8 |
|---|
| clusters++; |
| } |
| |
| if (lastc) |
| *lastc = clst; |
| return clusters * spc; |
| } |
| |
| 324,6 → 333,22 |
|---|
| |
| void fat_append_clusters(fat_node_t *nodep, fat_cluster_t mcl) |
| { |
| block_t *bb; |
| fat_cluster_t lcl; |
| uint8_t fatcnt, fatno; |
| |
| if (_fat_blcks_get(nodep->idx->dev_handle, nodep->firstc, &lcl) == 0) { |
| nodep->firstc = host2uint16_t_le(mcl); |
| nodep->dirty = true; /* need to sync node */ |
| return; |
| } |
| |
| bb = block_get(nodep->idx->dev_handle, BS_BLOCK, BS_SIZE); |
| fatcnt = FAT_BS(bb)->fatcnt; |
| block_put(bb); |
| |
| for (fatno = FAT1; fatno < fatcnt; fatno++) |
| fat_mark_cluster(nodep->idx->dev_handle, fatno, lcl, mcl); |
| } |
| |
| /** |