Add a new container data type, a Sparse Word Array: an array of UWord
which is also indexed by UWord. This can be used as a replacement for
WordFM with unboxed keys, when the key ranges are dense. It is
implemented as a 256-way radix tree (4-deep on 32-bit platforms,
8-deep on 64-bit platforms).
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8806 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/pub_core_sparsewa.h b/coregrind/pub_core_sparsewa.h
new file mode 100644
index 0000000..95b0899
--- /dev/null
+++ b/coregrind/pub_core_sparsewa.h
@@ -0,0 +1,51 @@
+
+/*--------------------------------------------------------------------*/
+/*--- An sparse array (of words) implementation. ---*/
+/*--- pub_core_sparsewa.h ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+ This file is part of Valgrind, a dynamic binary instrumentation
+ framework.
+
+ Copyright (C) 2008-2008 OpenWorks Ltd
+ info@open-works.co.uk
+
+ 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., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307, USA.
+
+ The GNU General Public License is contained in the file COPYING.
+*/
+
+#ifndef __PUB_CORE_SPARSEWA_H
+#define __PUB_CORE_SPARSEWA_H
+
+//--------------------------------------------------------------------
+// PURPOSE: Provides an implementation of a sparse array of host words
+// (UWord). The indices are themselves host words. The implementation
+// uses a 256-way radix tree, which is therefore 4 levels deep on a
+// 32-bit platform and 8 levels deep on a 64-bit platform.
+//--------------------------------------------------------------------
+
+// No core-only exports; everything in this module is visible to both
+// the core and tools.
+
+#include "pub_tool_sparsewa.h"
+
+#endif // __PUB_CORE_SPARSEWA_H
+
+/*--------------------------------------------------------------------*/
+/*--- end pub_core_sparsewa.h ---*/
+/*--------------------------------------------------------------------*/