Re: [PATCH 1/2] libceph: add signed type limits

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(Sorry, the subject line didn't match the content.
Please ignore the previous one--this is the right
patch.)


Flesh out the limits defined in <linux/ceph/decode.h> to include the
maximum and minimum values for signed type S8, S16, S32, and S64.

Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
 include/linux/ceph/decode.h |   18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/include/linux/ceph/decode.h b/include/linux/ceph/decode.h
index 689f1df..9575a52 100644
--- a/include/linux/ceph/decode.h
+++ b/include/linux/ceph/decode.h
@@ -10,10 +10,20 @@

 /* This seemed to be the easiest place to define these */

-#define	U8_MAX	((u8)  (~0U))
-#define	U16_MAX	((u16) (~0U))
-#define	U32_MAX	((u32) (~0U))
-#define	U64_MAX	((u64) (~0ULL))
+#define	U8_MAX	((u8)(~0U))
+#define	U16_MAX	((u16)(~0U))
+#define	U32_MAX	((u32)(~0U))
+#define	U64_MAX	((u64)(~0ULL))
+
+#define	S8_MAX	((s8)(U8_MAX >> 1))
+#define	S16_MAX	((s16)(U16_MAX >> 1))
+#define	S32_MAX	((s32)(U32_MAX >> 1))
+#define	S64_MAX	((s64)(U64_MAX >> 1LL))
+
+#define	S8_MIN	((s8)(-S8_MAX - 1))
+#define	S16_MIN	((s16)(-S16_MAX - 1))
+#define	S32_MIN	((s32)(-S32_MAX - 1))
+#define	S64_MIN	((s64)(-S64_MAX - 1LL))

 /*
  * in all cases,
-- 
1.7.9.5

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