Apply patches #5828, #5837, #5841, #5843.

[pspp-builds.git] / src / libpspp / range-set.h

diff --git a/src/libpspp/range-set.h b/src/libpspp/range-set.h
new file mode 100644 (file)
index 0000000..b6b60a4
--- /dev/null
+++ b/src/libpspp/range-set.h
@@ -0,0 +1,54 @@
+/* PSPP - computes sample statistics.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   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 the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
+
+/* Bitmap, implemented as a balanced binary tree.
+
+   Each operation has O(lg N) cost, where N is the number of
+   contiguous regions of 1-bits in the bitmap.  Also, a cache
+   reduces the second and subsequent containment tests within a
+   single contiguous region to O(1). */
+
+#ifndef LIBPSPP_RANGE_SET_H
+#define LIBPSPP_RANGE_SET_H
+
+#include <stdbool.h>
+
+struct pool;
+
+struct range_set *range_set_create (void);
+struct range_set *range_set_create_pool (struct pool *);
+void range_set_destroy (struct range_set *);
+
+void range_set_insert (struct range_set *,
+                       unsigned long int start, unsigned long int width);
+void range_set_delete (struct range_set *,
+                       unsigned long int start, unsigned long int width);
+bool range_set_allocate (struct range_set *, unsigned long int request,
+                         unsigned long int *start, unsigned long int *width);
+bool range_set_contains (const struct range_set *, unsigned long int position);
+
+bool range_set_is_empty (const struct range_set *);
+
+const struct range_set_node *range_set_first (const struct range_set *);
+const struct range_set_node *range_set_next (const struct range_set *,
+                                             const struct range_set_node *);
+unsigned long int range_set_node_get_start (const struct range_set_node *);
+unsigned long int range_set_node_get_end (const struct range_set_node *);
+unsigned long int range_set_node_get_width (const struct range_set_node *);
+
+#endif /* libpspp/range-set.h */