Changeset 7d78d163 in mainline for uspace/srv/fs/exfat/exfat_directory.c

Timestamp:

2011-08-15T17:20:15Z (13 years ago)

Author:

Oleg Romanenko <romanenko.oleg@…>

Branches:

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

Children:

9558eaa

Parents:

8a06c1b

Message:

exFAT: add exfat_directory_expand and exfat_directory_lookup_free functions

File:

• uspace/srv/fs/exfat/exfat_directory.c (modified) (1 diff)

uspace/srv/fs/exfat/exfat_directory.c

@@ -351 +351 @@
 }
 
+int exfat_directory_expand(exfat_directory_t *di)
+{
+        int rc;
+
+        if (!di->nodep)
+                return ENOSPC;
+
+        rc = exfat_node_expand(di->nodep->idx->devmap_handle, di->nodep, 1);
+        if (rc != EOK)
+                return rc;
+
+        di->fragmented = di->nodep->fragmented;
+        di->nodep->size += BPC(di->bs);
+        di->nodep->dirty = true;                /* need to sync node */
+        di->blocks = di->nodep->size / BPS(di->bs);
+        
+        return EOK;
+}
+
+int exfat_directory_lookup_free(exfat_directory_t *di, size_t count)
+{
+        int rc;
+        exfat_dentry_t *d;
+        size_t found;
+        aoff64_t pos;
+
+        rc = exfat_directory_seek(di, 0);
+        if (rc != EOK)
+                return rc;
+
+        do {
+                found = 0;
+                pos = 0;
+                do {
+                        if (exfat_directory_get(di, &d) == EOK) {
+                                switch (exfat_classify_dentry(d)) {
+                                case EXFAT_DENTRY_LAST:
+                                case EXFAT_DENTRY_FREE:
+                                        if (found==0) pos = di->pos;
+                                        found++;
+                                        if (found == count) {
+                                                exfat_directory_seek(di, pos);
+                                                return EOK;
+                                        }
+                                        break;
+                                default:
+                                        found = 0;
+                                        break;
+                                }
+                        }
+                } while (exfat_directory_next(di) == EOK);      
+        } while (exfat_directory_expand(di) == EOK);
+        return ENOSPC;
+}
+
 
 /**