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-rw-r--r--com32/include/syslinux/align.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/com32/include/syslinux/align.h b/com32/include/syslinux/align.h
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+++ b/com32/include/syslinux/align.h
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2009 Intel Corporation; author H. Peter Anvin
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+#ifndef _SYSLINUX_ALIGN_H
+#define _SYSLINUX_ALIGN_H
+
+#include <stdint.h>
+
+static inline uintptr_t __align_down(uintptr_t __p, uintptr_t __a)
+{
+ return __p & ~(__a - 1);
+}
+static inline uintptr_t __align_up(uintptr_t __p, uintptr_t __a)
+{
+ return (__p + __a - 1) & ~(__a - 1);
+}
+
+#define ALIGN_UP(p,a) ((__typeof__(p))__align_up((uintptr_t)(p), (a)))
+#define ALIGN_DOWN(p,a) ((__typeof__(p))__align_down((uintptr_t)(p), (a)))
+#define ALIGN_UP_FOR(p,t) ALIGN_UP(p,sizeof(t))
+#define ALIGN_DOWN_FOR(p,t) ALIGN_DOWN(p,sizeof(t))
+
+#endif /* _SYSLINUX_ALIGN_H */