* 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 as published by
*/
#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))
#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 */