From: Szymon Janc <szymon@janc.net.pl>
Date: Sun, 14 Aug 2011 09:41:19 +0000 (+0200)
Subject: Add helper functions for easier unaligned memory access.
X-Git-Tag: 2.00~1106^2~22
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2d7e331e2b5cb9899a13e5e105e96d2632da995;p=thirdparty%2Fgrub.git

Add helper functions for easier unaligned memory access.

* include/grub/types.h (grub_get_unaligned16): New function.
(grub_get_unaligned32): Likewise.
(grub_get_unaligned64): Likewise.
---

diff --git a/ChangeLog.lzo b/ChangeLog.lzo
index 6f5191db2..701715747 100644
--- a/ChangeLog.lzo
+++ b/ChangeLog.lzo
@@ -1,3 +1,11 @@
+2001-08-14  Szymon Janc  <szymon@janc.net.pl>
+
+	Add helper functions for easier unaligned memory access.
+
+	* include/grub/types.h (grub_get_unaligned16): New function.
+	(grub_get_unaligned32): Likewise.
+	(grub_get_unaligned64): Likewise.
+
 2011-08-14  Szymon Janc  <szymon@janc.net.pl>
 
 	Import minilzo library for LZO decompression support.
diff --git a/include/grub/types.h b/include/grub/types.h
index 32d255d40..f057dd3d3 100644
--- a/include/grub/types.h
+++ b/include/grub/types.h
@@ -222,4 +222,31 @@ static inline grub_uint64_t grub_swap_bytes64(grub_uint64_t x)
 # define grub_cpu_to_le32_compile_time(x)	((grub_uint32_t) (x))
 #endif /* ! WORDS_BIGENDIAN */
 
+static inline grub_uint16_t grub_get_unaligned16(void *ptr)
+{
+  struct
+    {
+      grub_uint16_t d;
+    } __attribute__((packed)) *dd = ptr;
+    return dd->d;
+}
+
+static inline grub_uint32_t grub_get_unaligned32(void *ptr)
+{
+  struct
+    {
+      grub_uint32_t d;
+    } __attribute__((packed)) *dd = ptr;
+    return dd->d;
+}
+
+static inline grub_uint64_t grub_get_unaligned64(void *ptr)
+{
+  struct
+    {
+      grub_uint64_t d;
+    } __attribute__((packed)) *dd = ptr;
+    return dd->d;
+}
+
 #endif /* ! GRUB_TYPES_HEADER */