From c89136ea4253c73e89e97f5138bb22d97ad9f564 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Wed, 14 Oct 2009 09:59:09 -0700
Subject: ceph: convert encode/decode macros to inlines

This avoids the fugly pass by reference and makes the code a bit easier
to read.

Signed-off-by: Sage Weil <sage@newdream.net>
---
 fs/ceph/decode.h | 129 +++++++++++++++++++++++++++++--------------------------
 1 file changed, 67 insertions(+), 62 deletions(-)

(limited to 'fs/ceph/decode.h')

diff --git a/fs/ceph/decode.h b/fs/ceph/decode.h
index fc2769df062d..91179fb2cc3f 100644
--- a/fs/ceph/decode.h
+++ b/fs/ceph/decode.h
@@ -3,12 +3,44 @@
 
 #include <asm/unaligned.h>
 
+#include "types.h"
+
 /*
  * in all cases,
  *   void **p     pointer to position pointer
  *   void *end    pointer to end of buffer (last byte + 1)
  */
 
+static inline u64 ceph_decode_64(void **p)
+{
+	u64 v = get_unaligned_le64(*p);
+	*p += sizeof(u64);
+	return v;
+}
+static inline u32 ceph_decode_32(void **p)
+{
+	u32 v = get_unaligned_le32(*p);
+	*p += sizeof(u32);
+	return v;
+}
+static inline u16 ceph_decode_16(void **p)
+{
+	u16 v = get_unaligned_le16(*p);
+	*p += sizeof(u16);
+	return v;
+}
+static inline u8 ceph_decode_8(void **p)
+{
+	u8 v = *(u8 *)*p;
+	(*p)++;
+	return v;
+}
+static inline void ceph_decode_copy(void **p, void *pv, size_t n)
+{
+	memcpy(pv, *p, n);
+	*p += n;
+}
+
 /*
  * bounds check input.
  */
@@ -18,48 +50,20 @@
 			goto bad;			\
 	} while (0)
 
-#define ceph_decode_64(p, v)					\
-	do {							\
-		v = get_unaligned_le64(*(p));			\
-		*(p) += sizeof(u64);				\
-	} while (0)
-#define ceph_decode_32(p, v)					\
-	do {							\
-		v = get_unaligned_le32(*(p));			\
-		*(p) += sizeof(u32);				\
-	} while (0)
-#define ceph_decode_16(p, v)					\
-	do {							\
-		v = get_unaligned_le16(*(p));			\
-		*(p) += sizeof(u16);				\
-	} while (0)
-#define ceph_decode_8(p, v)				\
-	do {						\
-		v = *(u8 *)*(p);			\
-		(*p)++;					\
-	} while (0)
-
-#define ceph_decode_copy(p, pv, n)			\
-	do {						\
-		memcpy(pv, *(p), n);			\
-		*(p) += n;				\
-	} while (0)
-
-/* bounds check too */
 #define ceph_decode_64_safe(p, end, v, bad)			\
 	do {							\
 		ceph_decode_need(p, end, sizeof(u64), bad);	\
-		ceph_decode_64(p, v);				\
+		v = ceph_decode_64(p);				\
 	} while (0)
 #define ceph_decode_32_safe(p, end, v, bad)			\
 	do {							\
 		ceph_decode_need(p, end, sizeof(u32), bad);	\
-		ceph_decode_32(p, v);				\
+		v = ceph_decode_32(p);				\
 	} while (0)
 #define ceph_decode_16_safe(p, end, v, bad)			\
 	do {							\
 		ceph_decode_need(p, end, sizeof(u16), bad);	\
-		ceph_decode_16(p, v);				\
+		v = ceph_decode_16(p);				\
 	} while (0)
 
 #define ceph_decode_copy_safe(p, end, pv, n, bad)		\
@@ -71,41 +75,42 @@
 /*
  * struct ceph_timespec <-> struct timespec
  */
-#define ceph_decode_timespec(ts, tv)					\
-	do {								\
-		(ts)->tv_sec = le32_to_cpu((tv)->tv_sec);		\
-		(ts)->tv_nsec = le32_to_cpu((tv)->tv_nsec);		\
-	} while (0)
-#define ceph_encode_timespec(tv, ts)				\
-	do {							\
-		(tv)->tv_sec = cpu_to_le32((ts)->tv_sec);	\
-		(tv)->tv_nsec = cpu_to_le32((ts)->tv_nsec);	\
-	} while (0)
-
+static inline void ceph_decode_timespec(struct timespec *ts,
+					struct ceph_timespec *tv)
+{
+	ts->tv_sec = le32_to_cpu(tv->tv_sec);
+	ts->tv_nsec = le32_to_cpu(tv->tv_nsec);
+}
+static inline void ceph_encode_timespec(struct ceph_timespec *tv,
+					struct timespec *ts)
+{
+	tv->tv_sec = cpu_to_le32(ts->tv_sec);
+	tv->tv_nsec = cpu_to_le32(ts->tv_nsec);
+}
 
 /*
  * encoders
  */
-#define ceph_encode_64(p, v)						\
-	do {								\
-		put_unaligned_le64(v, (__le64 *)*(p));			\
-		*(p) += sizeof(u64);					\
-	} while (0)
-#define ceph_encode_32(p, v)					\
-	do {							\
-		put_unaligned_le32(v, (__le32 *)*(p));		\
-		*(p) += sizeof(u32);				\
-	} while (0)
-#define ceph_encode_16(p, v)					\
-	do {							\
-		put_unaligned_le16(v), (__le16 *)*(p));		\
-	*(p) += sizeof(u16);					\
-	} while (0)
-#define ceph_encode_8(p, v)			  \
-	do {					  \
-		*(u8 *)*(p) = v;		  \
-		(*(p))++;			  \
-	} while (0)
+static inline void ceph_encode_64(void **p, u64 v)
+{
+	put_unaligned_le64(v, (__le64 *)*p);
+	*p += sizeof(u64);
+}
+static inline void ceph_encode_32(void **p, u32 v)
+{
+	put_unaligned_le32(v, (__le32 *)*p);
+	*p += sizeof(u32);
+}
+static inline void ceph_encode_16(void **p, u16 v)
+{
+	put_unaligned_le16(v, (__le16 *)*p);
+	*p += sizeof(u16);
+}
+static inline void ceph_encode_8(void **p, u8 v)
+{
+	*(u8 *)*p = v;
+	(*p)++;
+}
 
 /*
  * filepath, string encoders
-- 
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