Adding IVAL64() and SIVAL64().

2 files changed, 28 insertions, 4 deletions

diff --git a/byteorder.h b/byteorder.h
index 831644fe..22e807ab 100644
--- a/byteorder.h
+++ b/byteorder.h
@@ -38,9 +38,11 @@
 
 #define PVAL(buf,pos) (UVAL(buf,pos)|UVAL(buf,(pos)+1)<<8)
 #define IVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+2)<<16)
+#define IVAL64(buf,pos) (IVAL(buf,pos)|(int64)IVAL(buf,(pos)+4)<<32)
 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
 #define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16))
-#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val)))
+#define SIVAL(buf,pos,val) SIVALX(buf,pos,(uint32)(val))
+#define SIVAL64(buf,pos,val) (SIVAL(buf,pos,val),SIVAL(buf,(pos)+4,(val)>>32))
 
 #define IVALu(buf,pos) IVAL(buf,pos)
 #define SIVALu(buf,pos,val) SIVAL(buf,pos,val)
@@ -95,6 +97,28 @@ SIVAL(char *buf, int pos, uint32 val)
 	SIVALu((uchar*)buf, pos, val);
 }
 
+static inline int64
+IVAL64(const char *buf, int pos)
+{
+	union {
+		const char *b;
+		const int64 *num;
+	} u;
+	u.b = buf + pos;
+	return *u.num;
+}
+
+static inline void
+SIVAL64(char *buf, int pos, int64 val)
+{
+	union {
+		char *b;
+		int64 *num;
+	} u;
+	u.b = buf + pos;
+	*u.num = val;
+}
+
 # endif /* !AVOID_BYTEORDER_INLINE */
 
 #endif /* !CAREFUL_ALIGNMENT */
diff --git a/io.c b/io.c
index 264824e7..354fc133 100644
--- a/io.c
+++ b/io.c
@@ -1785,7 +1785,7 @@ int64 read_varlong(int f, uchar min_bytes)
 #if SIZEOF_INT64 < 8
 	u.x = IVAL(u.b,0);
 #elif CAREFUL_ALIGNMENT
-	u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32);
+	u.x = IVAL64(u.b,0);
 #endif
 	return u.x;
 }
@@ -2037,10 +2037,10 @@ void write_varlong(int f, int64 x, uchar min_bytes)
 	uchar bit;
 	int cnt = 8;
 
-	SIVAL(b, 1, x);
 #if SIZEOF_INT64 >= 8
-	SIVAL(b, 5, x >> 32);
+	SIVAL64(b, 1, x);
 #else
+	SIVAL(b, 1, x);
 	if (x <= 0x7FFFFFFF && x >= 0)
 		memset(b + 5, 0, 4);
 	else {