Imported Upstream version 0.9.8
[sven/exfat-utils.git] / mkfs / cbm.c
index 1a79a6b8a494d14d7b9f53cd88a73b46c1ae55f1..1651160031178ead7393bb44440f131dd42308c1 100644 (file)
@@ -2,7 +2,7 @@
        cbm.c (09.11.10)
        Clusters Bitmap creation code.
 
-       Copyright (C) 2009, 2010  Andrew Nayenko
+       Copyright (C) 2011, 2012  Andrew Nayenko
 
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <unistd.h>
 #include <limits.h>
-#include <inttypes.h>
-#include <errno.h>
-#include "mkexfat.h"
+#include "cbm.h"
+#include "fat.h"
 #include "uct.h"
 #include "rootdir.h"
 
-off_t cbm_alignment(void)
+static off_t cbm_alignment(void)
 {
-       return CLUSTER_SIZE(sb);
+       return get_cluster_size();
 }
 
-off_t cbm_size(void)
+static off_t cbm_size(void)
 {
-       return DIV_ROUND_UP(le32_to_cpu(sb.cluster_count), CHAR_BIT);
+       return DIV_ROUND_UP(
+                       (get_volume_size() - get_position(&cbm)) / get_cluster_size(),
+                       CHAR_BIT);
 }
 
-int cbm_write(struct exfat_dev* dev, off_t base)
+static int cbm_write(struct exfat_dev* dev)
 {
        uint32_t allocated_clusters =
-                       DIV_ROUND_UP(cbm_size(), CLUSTER_SIZE(sb)) +
-                       DIV_ROUND_UP(uct_size(), CLUSTER_SIZE(sb)) +
-                       DIV_ROUND_UP(rootdir_size(), CLUSTER_SIZE(sb));
+                       DIV_ROUND_UP(cbm.get_size(), get_cluster_size()) +
+                       DIV_ROUND_UP(uct.get_size(), get_cluster_size()) +
+                       DIV_ROUND_UP(rootdir.get_size(), get_cluster_size());
        size_t bitmap_size = DIV_ROUND_UP(allocated_clusters, CHAR_BIT);
        uint8_t* bitmap = malloc(bitmap_size);
        size_t i;
 
        if (bitmap == NULL)
-               return errno;
+       {
+               exfat_error("failed to allocate bitmap of %zu bytes", bitmap_size);
+               return 1;
+       }
 
        for (i = 0; i < bitmap_size * CHAR_BIT; i++)
                if (i < allocated_clusters)
@@ -55,11 +58,17 @@ int cbm_write(struct exfat_dev* dev, off_t base)
                else
                        BMAP_CLR(bitmap, i);
        if (exfat_write(dev, bitmap, bitmap_size) < 0)
-               return errno;
+       {
+               exfat_error("failed to write bitmap of %zu bytes", bitmap_size);
+               return 1;
+       }
        free(bitmap);
-
-       sb.cluster_sector_start = cpu_to_le32(base / SECTOR_SIZE(sb));
-       bitmap_entry.start_cluster = cpu_to_le32(OFFSET_TO_CLUSTER(base));
-       bitmap_entry.size = cpu_to_le64(cbm_size());
        return 0;
 }
+
+const struct fs_object cbm =
+{
+       .get_alignment = cbm_alignment,
+       .get_size = cbm_size,
+       .write = cbm_write,
+};