From b1487ee909ebd4cfc59f30d3678cb6667d4a72c8 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Tue, 26 May 1998 21:38:06 +0000
Subject: Added generic functions for unaligned data access.

---
 lib/unaligned.h | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'lib/unaligned.h')

diff --git a/lib/unaligned.h b/lib/unaligned.h
index 29fcee9..53e32e5 100644
--- a/lib/unaligned.h
+++ b/lib/unaligned.h
@@ -1,5 +1,5 @@
 /*
- *	Unaligned Data Accesses
+ *	Unaligned Data Accesses -- Generic Version
  *
  *	(c) 1998 Martin Mares <mj@ucw.cz>
  *
@@ -9,4 +9,34 @@
 #ifndef _BIRD_UNALIGNED_H_
 #define _BIRD_UNALIGNED_H_
 
+#if CPU_NEEDS_ALIGN_WORD != 1 || CPU_NEEDS_ALIGN_LONG != 1
+#include <string.h>
+#endif
+
+#if CPU_NEEDS_ALIGN_WORD == 1
+#define unaligned_u16(p) (*((u16 *)(p)))
+#else
+static inline u16
+unaligned_u16(void *p)
+{
+  u16 x;
+
+  memcpy(&x, p, sizeof(x));
+  return x;
+}
+#endif
+
+#if CPU_NEEDS_ALIGN_LONG == 1
+#define unaligned_u32(p) (*((u32 *)(p)))
+#else
+static inline u32
+unaligned_u32(void *p)
+{
+  u32 x;
+
+  memcpy(&x, p, sizeof(x));
+  return x;
+}
+#endif
+
 #endif
-- 
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