Changeset 5d5863c in mainline for uspace/srv/fs/exfat/exfat_fat.c

Timestamp:

2011-08-14T09:23:46Z (13 years ago)

Author:

Oleg Romanenko <romanenko.oleg@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

25c60f4

Parents:

5f0e16e4

Message:

exFAT: move bitmap_* function to separate file exfat_bitmap.c

File:

• uspace/srv/fs/exfat/exfat_fat.c (modified) (4 diffs)

uspace/srv/fs/exfat/exfat_fat.c

@@ -34 +34 @@
 /**
  * @file        exfat_fat.c
- * @brief       Functions that manipulate the File Allocation Tables.
+ * @brief       Functions that manipulate the File Allocation Table.
  */
 
@@ -169 +169 @@
 }
 
-/** Read block from file located on a FAT file system.
+/** Read block from file located on a exFAT file system.
  *
  * @param block         Pointer to a block pointer for storing result.
@@ -476 +476 @@
 }
 
-int bitmap_is_free(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t clst)
-{
-        /* TODO */
-        return EOK;
-}
-
-int bitmap_set_cluster(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t firstc)
-{
-        /* TODO */
-        return EOK;
-}
-
-int bitmap_clear_cluster(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t firstc)
-{
-        /* TODO */
-        return EOK;
-}
-
-int bitmap_set_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t firstc, exfat_cluster_t count)
-{
-        int rc;
-        exfat_cluster_t clst;
-        clst = firstc;
-
-        while (clst < firstc+count ) {
-                rc = bitmap_set_cluster(bs, devmap_handle, clst);
-                if (rc != EOK) {
-                        if ((clst-firstc) > 0)
-                                (void) bitmap_clear_clusters(bs, devmap_handle, firstc, clst-firstc);
-                        return rc;
-                }
-                clst++;
-        }
-        return EOK;
-}
-
-int bitmap_clear_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t firstc, exfat_cluster_t count)
-{
-        int rc;
-        exfat_cluster_t clst;
-        clst = firstc;
-
-        while (clst < firstc+count ) {
-                rc = bitmap_clear_cluster(bs, devmap_handle, clst);
-                if (rc != EOK)
-                        return rc;
-                clst++;
-        }
-        return EOK;
-}
-
-int bitmap_alloc_clusters(exfat_bs_t *bs, devmap_handle_t devmap_handle, 
-    exfat_cluster_t *firstc, exfat_cluster_t count)
-{
-        exfat_cluster_t startc, endc;
-        startc = EXFAT_CLST_FIRST;
-
-        while (startc < DATA_CNT(bs)+2) {
-                if (bitmap_is_free(bs, devmap_handle, startc) == EOK) {
-                        endc = startc+1;
-                        while (bitmap_is_free(bs, devmap_handle, endc) == EOK) {
-                                if ((endc - startc)+1 == count){
-                                        *firstc = startc;
-                                        return bitmap_set_clusters(bs, devmap_handle, startc, count);
-                                }
-                                else
-                                        endc++;
-                        }
-                        startc = endc+1;
-                } 
-                else
-                        startc++;
-        }
-        return ENOSPC;
-}
-
-
-int bitmap_append_clusters(exfat_bs_t *bs, exfat_node_t *nodep, 
-    exfat_cluster_t count)
-{
-        if (nodep->firstc == 0) {
-                return bitmap_alloc_clusters(bs, nodep->idx->devmap_handle, 
-                    &nodep->firstc, count);
-        } else {
-                exfat_cluster_t lastc, clst;
-                lastc = nodep->firstc + ROUND_UP(nodep->size, BPC(bs)) / BPC(bs) - 1;
-
-                clst = lastc+1;
-                while (bitmap_is_free(bs, nodep->idx->devmap_handle, clst) == EOK) {
-                        if ((clst - lastc) == count){
-                                return bitmap_set_clusters(bs, nodep->idx->devmap_handle, 
-                                    lastc+1, count);
-                        }
-                        else
-                                clst++;
-                }
-                return ENOSPC;
-        }
-}
-
-
-int bitmap_free_clusters(exfat_bs_t *bs, exfat_node_t *nodep, 
-    exfat_cluster_t count)
-{
-        exfat_cluster_t lastc;
-        lastc = nodep->firstc + ROUND_UP(nodep->size, BPC(bs)) / BPC(bs) - 1;
-        lastc -= count;
-
-        return bitmap_clear_clusters(bs, nodep->idx->devmap_handle, lastc+1, count);
-}
-
-
-int bitmap_replicate_clusters(exfat_bs_t *bs, exfat_node_t *nodep)
-{
-        int rc;
-        exfat_cluster_t lastc, clst;
-        devmap_handle_t devmap_handle = nodep->idx->devmap_handle;
-        lastc = nodep->firstc + ROUND_UP(nodep->size, BPC(bs)) / BPC(bs) - 1;
-
-        for (clst = nodep->firstc; clst < lastc; clst++) {
-                rc = exfat_set_cluster(bs, devmap_handle, clst, clst+1);
-                if (rc != EOK)
-                        return rc;
-        }
-
-        return exfat_set_cluster(bs, devmap_handle, lastc, EXFAT_CLST_EOF);
-}
-
-
-
 /** Perform basic sanity checks on the file system.
  *
@@ -619 +484 @@
 int exfat_sanity_check(exfat_bs_t *bs, devmap_handle_t devmap_handle)
 {
+        /* TODO */
         return EOK;
 }