* Simple byteorder handling.
*
* Copyright (C) 1992-1995 Andrew Tridgell
- * Copyright (C) 2007 Wayne Davison
+ * Copyright (C) 2007-2008 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ * with this program; if not, visit the http://fsf.org website.
*/
#undef CAREFUL_ALIGNMENT
+#undef AVOID_BYTEORDER_INLINE
/* We know that the x86 can handle misalignment and has the same
* byte order (LSB-first) as the 32-bit numbers we transmit. */
#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
#define UVAL(buf,pos) ((uint32)CVAL(buf,pos))
-#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val))
-
-/* Our 64-bit numbers are sent in MSB-first order so that we can use
- * the highest bits to indicate the number of bytes sent. */
-#define NVAL1(b,m) (UVAL(b,0)&~(uint32)(m))
-#define NVAL2(b,m) (NVAL1(b,m)<<8|UVAL(b,1))
-#define NVAL3(b,m) (NVAL2(b,m)<<8|UVAL(b,2))
-#define NVAL4(b,m) (NVAL3(b,m)<<8|UVAL(b,3))
-#define NVAL5(b,m) ((int64)NVAL4(b,m)<<8|UVAL(b,4))
-#define NVAL6(b,m) (NVAL5(b,m)<<8|UVAL(b,5))
-#define NVAL7(b,m) (NVAL6(b,m)<<8|UVAL(b,6))
-#define NVAL8(b,m) (NVAL7(b,m)<<8|UVAL(b,7))
#if CAREFUL_ALIGNMENT
+
#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 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)))
-#else
-/* this handles things for architectures like the 386 that can handle
- alignment errors */
-/*
- WARNING: This section is dependent on the length of int32
- being correct. set CAREFUL_ALIGNMENT if it is not.
-*/
+
+#define IVALu(buf,pos) IVAL(buf,pos)
+#define SIVALu(buf,pos,val) SIVAL(buf,pos,val)
+
+#else /* !CAREFUL_ALIGNMENT */
+
+/* This handles things for architectures like the 386 that can handle alignment errors.
+ * WARNING: This section is dependent on the length of an int32 (and thus a uint32)
+ * being correct (4 bytes)! Set CAREFUL_ALIGNMENT if it is not. */
+
+# ifdef AVOID_BYTEORDER_INLINE
+
#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos)))
#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val))
-#endif
+
+#define IVALu(buf,pos) IVAL(buf,pos)
+#define SIVALu(buf,pos,val) SIVAL(buf,pos,val)
+
+# else /* !AVOID_BYTEORDER_INLINE */
+
+static inline uint32
+IVALu(const uchar *buf, int pos)
+{
+ union {
+ const uchar *b;
+ const uint32 *num;
+ } u;
+ u.b = buf + pos;
+ return *u.num;
+}
+
+static inline void
+SIVALu(uchar *buf, int pos, uint32 val)
+{
+ union {
+ uchar *b;
+ uint32 *num;
+ } u;
+ u.b = buf + pos;
+ *u.num = val;
+}
+
+static inline uint32
+IVAL(const char *buf, int pos)
+{
+ return IVALu((uchar*)buf, pos);
+}
+
+static inline void
+SIVAL(char *buf, int pos, uint32 val)
+{
+ SIVALu((uchar*)buf, pos, val);
+}
+
+# endif /* !AVOID_BYTEORDER_INLINE */
+
+#endif /* !CAREFUL_ALIGNMENT */