Initial check-in of (stripped-down) UCL data compression library v 1.01

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8087 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 81 insertions, 0 deletions

diff --git a/tools/ucl/src/ucl_ptr.c b/tools/ucl/src/ucl_ptr.c
new file mode 100644
index 0000000..b092d24
--- /dev/null
+++ b/tools/ucl/src/ucl_ptr.c
@@ -0,0 +1,81 @@
+/* ucl_ptr.c -- low-level pointer constructs
+
+   This file is part of the UCL data compression library.
+
+   Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
+   All Rights Reserved.
+
+   The UCL library 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.
+
+   The UCL library 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 the UCL library; see the file COPYING.
+   If not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   Markus F.X.J. Oberhumer
+   <markus@oberhumer.com>
+   http://www.oberhumer.com/opensource/ucl/
+ */
+
+
+#include "ucl_conf.h"
+
+
+/***********************************************************************
+//
+************************************************************************/
+
+UCL_PUBLIC(ucl_ptr_t)
+__ucl_ptr_linear(const ucl_voidp ptr)
+{
+    ucl_ptr_t p;
+
+#if defined(__UCL_DOS16) || defined(__UCL_WIN16)
+    p = (((ucl_ptr_t)(_FP_SEG(ptr))) << (16 - __UCL_HShift)) + (_FP_OFF(ptr));
+#else
+    p = PTR_LINEAR(ptr);
+#endif
+
+    return p;
+}
+
+
+/***********************************************************************
+//
+************************************************************************/
+
+UCL_PUBLIC(unsigned)
+__ucl_align_gap(const ucl_voidp ptr, ucl_uint size)
+{
+    ucl_ptr_t p, s, n;
+
+    assert(size > 0);
+
+    p = __ucl_ptr_linear(ptr);
+    s = (ucl_ptr_t) (size - 1);
+#if 0
+    assert((size & (size - 1)) == 0);
+    n = ((p + s) & ~s) - p;
+#else
+    n = (((p + s) / size) * size) - p;
+#endif
+
+    assert((long)n >= 0);
+    assert(n <= s);
+
+    return (unsigned)n;
+}
+
+
+
+/*
+vi:ts=4:et
+*/