- use define instead of pure value

diff --git a/snapper/BtrfsUtils.cc b/snapper/BtrfsUtils.cc
index 2f7e2a93c917da75592874b73aa3bf603be58186..8e6e3b4063c9c93c9a2250a87f35e3f2689d999c 100644 (file)
--- a/snapper/BtrfsUtils.cc
+++ b/snapper/BtrfsUtils.cc
@@ -339,21 +339,21 @@ namespace snapper
        qgroup_t
        calc_qgroup(uint64_t level, subvolid_t id)
        {
-           return (level << 48) | id;
+           return (level << BTRFS_QGROUP_LEVEL_SHIFT) | id;
        }
 
 
        uint64_t
        get_level(qgroup_t qgroup)
        {
-           return qgroup >> 48;
+           return qgroup >> BTRFS_QGROUP_LEVEL_SHIFT;
        }
 
 
        uint64_t
        get_subvolid(qgroup_t qgroup)
        {
-           return qgroup & ((1LLU << 48) - 1);
+           return qgroup & ((1LLU << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
        }
 
 
@@ -535,7 +535,7 @@ namespace snapper
 
            TreeSearchOpts tree_search_opts(BTRFS_QGROUP_INFO_KEY);
            tree_search_opts.min_offset = calc_qgroup(level, 0);
-           tree_search_opts.max_offset = calc_qgroup(level, (1LLU << 48) - 1);
+           tree_search_opts.max_offset = calc_qgroup(level, (1LLU << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
            tree_search_opts.callback = [&qgroups](const struct btrfs_ioctl_search_args& args,
                                                   const struct btrfs_ioctl_search_header& sh)
            {