[patch] 0070_all_glibc-2.18-localedef-page-align-1.patch

0070_all_glibc-2.18-localedef-page-align-1.patch (text/plain), 1.92 KB, created by SpanKY on 2013-06-25 00:45:43 UTC

From d605071ebf1fbbba5998a349540d4ad4e667f65e Mon Sep 17 00:00:00 2001
From: Mike Frysinger <[e-mail]>
Date: Tue, 28 May 2013 18:25:54 -0400
Subject: [PATCH 1/2] libc-internal.h: add ALIGN helper macros

Rather than open coding the masks, add helper macros to do the magic.
This makes code easier to read.

Signed-off-by: Mike Frysinger <[e-mail]>
---
 ChangeLog               |  7 +++++++
 include/libc-internal.h | 20 ++++++++++++++++++++
 2 files changed, 27 insertions(+)

2013-06-24  Mike Frysinger  <[e-mail]>

	* include/libc-internal.h (ALIGN_DOWN): New helper macro.
	(ALIGN_UP): Likewise.
	(PTR_ALIGN_DOWN): Likewise.
	(PTR_ALIGN_UP): Likewise.

diff --git a/include/libc-internal.h b/include/libc-internal.h
index 0c0fa02..78f82da 100644
--- a/include/libc-internal.h
+++ b/include/libc-internal.h
@@ -50,4 +50,24 @@ extern void __init_misc (int, char **, char **);
 /* Cast an integer or a pointer VAL to integer with proper type.  */
 # define cast_to_integer(val) ((__integer_if_pointer_type (val)) (val))
 
+/* Align a value by rounding down to closest size.
+   e.g. Using size of 4096, we get this behavior:
+	{4095, 4096, 4097} = {0, 4096, 4096}.  */
+#define ALIGN_DOWN(base, size)	((base) & -((__typeof__ (base)) (size)))
+
+/* Align a value by rounding up to closest size.
+   e.g. Using size of 4096, we get this behavior:
+	{4095, 4096, 4097} = {4096, 4096, 8192}.
+
+  Note: The size argument has side effects (expanded multiple times).  */
+#define ALIGN_UP(base, size)	ALIGN_DOWN ((base) + (size) - 1, (size))
+
+/* Same as ALIGN_DOWN(), but automatically casts when base is a pointer.  */
+#define PTR_ALIGN_DOWN(base, size) \
+  ((__typeof__ (base)) ALIGN_DOWN ((uintptr_t) (base), (size)))
+
+/* Same as ALIGN_UP(), but automatically casts when base is a pointer.  */
+#define PTR_ALIGN_UP(base, size) \
+  ((__typeof__ (base)) ALIGN_UP ((uintptr_t) (base), (size)))
+
 #endif /* _LIBC_INTERNAL  */
-- 
1.8.2.1