New include file for address alignment.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5313 b7a2c559-68d2-44c3-8de9-860c34a00d81

diff --git a/src/common/alignment.h b/src/common/alignment.h
new file mode 100644 (file)
index 0000000..795797a
--- /dev/null
+++ b/src/common/alignment.h
@@ -0,0 +1,71 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                                alignment.h                                */
+/*                                                                           */
+/*                             Address aligment                              */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2011,      Ullrich von Bassewitz                                      */
+/*                Roemerstrasse 52                                           */
+/*                70794 Filderstadt                                          */
+/* EMail:         uz@cc65.org                                                */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#ifndef ALIGNMENT_H
+#define ALIGNMENT_H
+
+
+
+/* common */
+#include "inline.h"
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+#if defined(HAVE_INLINE)
+INLINE unsigned long AlignAddr (unsigned long Addr, unsigned long Alignment)
+/* Align an address to the given alignment */
+{
+    return ((Addr + Alignment - 1) / Alignment) * Alignment;
+}
+#else
+/* Beware: Evaluates the argument more than once! */
+#  define AlignAddr(Addr, Alignment)    \
+        ((((Addr) + (Alignment) - 1) / (Alignment)) * (Alignment))
+#endif
+
+
+
+/* End of alignment.h */
+
+#endif
+
+
+