Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

sdk/lib/fslib/ext2lib/Group.c

@@ -0,0 +1,68 @@
+/*
+ * PROJECT:          Mke2fs
+ * FILE:             Group.c
+ * PROGRAMMER:       Matt Wu <mattwu@163.com>
+ * HOMEPAGE:         http://ext2.yeah.net
+ */
+
+/* INCLUDES **************************************************************/
+
+#include "Mke2fs.h"
+
+/* DEFINITIONS ***********************************************************/
+
+/* FUNCTIONS *************************************************************/
+
+int test_root(int a, int b)
+{
+    if (a == 0)
+        return 1;
+    while (1)
+    {
+        if (a == 1)
+            return 1;
+        if (a % b)
+            return 0;
+        a = a / b;
+    }
+}
+
+bool ext2_bg_has_super(PEXT2_SUPER_BLOCK pExt2Sb, int group_block)
+{
+    if (!(pExt2Sb->s_feature_ro_compat & EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
+        return true;
+
+    if (test_root(group_block, 3) || (test_root(group_block, 5)) ||
+        test_root(group_block, 7))
+        return true;
+    
+    return false;
+}
+
+
+bool ext2_allocate_group_desc(PEXT2_FILESYS Ext2Sys)
+{
+    ULONG size;
+
+    size = Ext2Sys->desc_blocks * Ext2Sys->blocksize;
+
+    Ext2Sys->group_desc =
+        (PEXT2_GROUP_DESC)RtlAllocateHeap(RtlGetProcessHeap(), 0, size);
+
+    if (Ext2Sys->group_desc)
+    {
+        memset(Ext2Sys->group_desc, 0, size);
+        return true;
+    }
+
+    return false;
+}
+
+void ext2_free_group_desc(PEXT2_FILESYS Ext2Sys)
+{
+    if (Ext2Sys->group_desc)
+    {
+        RtlFreeHeap(RtlGetProcessHeap(), 0, Ext2Sys->group_desc);
+        Ext2Sys->group_desc = NULL;
+    }
+}