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/* pint.h
* Definitions for extracting and translating integers safely and portably
* via pointers.
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
*
* 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 the Free Software Foundation; either version 2
* 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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.
*/
#ifndef __PINT_H__
#define __PINT_H__
#include <glib.h>
/* Pointer versions of g_ntohs and g_ntohl. Given a pointer to a member of a
* byte array, returns the value of the two or four bytes at the pointer.
* The pletoh[sl] versions return the little-endian representation.
*/
#define pntohs(p) ((guint16) \
((guint16)*((const guint8 *)(p)+0)<<8| \
(guint16)*((const guint8 *)(p)+1)<<0))
#define pntoh24(p) ((guint32)*((const guint8 *)(p)+0)<<16| \
(guint32)*((const guint8 *)(p)+1)<<8| \
(guint32)*((const guint8 *)(p)+2)<<0)
#define pntohl(p) ((guint32)*((const guint8 *)(p)+0)<<24| \
(guint32)*((const guint8 *)(p)+1)<<16| \
(guint32)*((const guint8 *)(p)+2)<<8| \
(guint32)*((const guint8 *)(p)+3)<<0)
#define pntoh40(p) ((guint64)*((const guint8 *)(p)+0)<<32| \
(guint64)*((const guint8 *)(p)+1)<<24| \
(guint64)*((const guint8 *)(p)+2)<<16| \
(guint64)*((const guint8 *)(p)+3)<<8| \
(guint64)*((const guint8 *)(p)+4)<<0)
#define pntoh48(p) ((guint64)*((const guint8 *)(p)+0)<<40| \
(guint64)*((const guint8 *)(p)+1)<<32| \
(guint64)*((const guint8 *)(p)+2)<<24| \
(guint64)*((const guint8 *)(p)+3)<<16| \
(guint64)*((const guint8 *)(p)+4)<<8| \
(guint64)*((const guint8 *)(p)+5)<<0)
#define pntoh56(p) ((guint64)*((const guint8 *)(p)+0)<<48| \
(guint64)*((const guint8 *)(p)+1)<<40| \
(guint64)*((const guint8 *)(p)+2)<<32| \
(guint64)*((const guint8 *)(p)+3)<<24| \
(guint64)*((const guint8 *)(p)+4)<<16| \
(guint64)*((const guint8 *)(p)+5)<<8| \
(guint64)*((const guint8 *)(p)+6)<<0)
#define pntoh64(p) ((guint64)*((const guint8 *)(p)+0)<<56| \
(guint64)*((const guint8 *)(p)+1)<<48| \
(guint64)*((const guint8 *)(p)+2)<<40| \
(guint64)*((const guint8 *)(p)+3)<<32| \
(guint64)*((const guint8 *)(p)+4)<<24| \
(guint64)*((const guint8 *)(p)+5)<<16| \
(guint64)*((const guint8 *)(p)+6)<<8| \
(guint64)*((const guint8 *)(p)+7)<<0)
#define pletohs(p) ((guint16) \
((guint16)*((const guint8 *)(p)+1)<<8| \
(guint16)*((const guint8 *)(p)+0)<<0))
#define pletoh24(p) ((guint32)*((const guint8 *)(p)+2)<<16| \
(guint32)*((const guint8 *)(p)+1)<<8| \
(guint32)*((const guint8 *)(p)+0)<<0)
#define pletohl(p) ((guint32)*((const guint8 *)(p)+3)<<24| \
(guint32)*((const guint8 *)(p)+2)<<16| \
(guint32)*((const guint8 *)(p)+1)<<8| \
(guint32)*((const guint8 *)(p)+0)<<0)
#define pletoh40(p) ((guint64)*((const guint8 *)(p)+4)<<32| \
(guint64)*((const guint8 *)(p)+3)<<24| \
(guint64)*((const guint8 *)(p)+2)<<16| \
(guint64)*((const guint8 *)(p)+1)<<8| \
(guint64)*((const guint8 *)(p)+0)<<0)
#define pletoh48(p) ((guint64)*((const guint8 *)(p)+5)<<40| \
(guint64)*((const guint8 *)(p)+4)<<32| \
(guint64)*((const guint8 *)(p)+3)<<24| \
(guint64)*((const guint8 *)(p)+2)<<16| \
(guint64)*((const guint8 *)(p)+1)<<8| \
(guint64)*((const guint8 *)(p)+0)<<0)
#define pletoh56(p) ((guint64)*((const guint8 *)(p)+6)<<48| \
(guint64)*((const guint8 *)(p)+5)<<40| \
(guint64)*((const guint8 *)(p)+4)<<32| \
(guint64)*((const guint8 *)(p)+3)<<24| \
(guint64)*((const guint8 *)(p)+2)<<16| \
(guint64)*((const guint8 *)(p)+1)<<8| \
(guint64)*((const guint8 *)(p)+0)<<0)
#define pletoh64(p) ((guint64)*((const guint8 *)(p)+7)<<56| \
(guint64)*((const guint8 *)(p)+6)<<48| \
(guint64)*((const guint8 *)(p)+5)<<40| \
(guint64)*((const guint8 *)(p)+4)<<32| \
(guint64)*((const guint8 *)(p)+3)<<24| \
(guint64)*((const guint8 *)(p)+2)<<16| \
(guint64)*((const guint8 *)(p)+1)<<8| \
(guint64)*((const guint8 *)(p)+0)<<0)
/* Pointer routines to put items out in a particular byte order.
* These will work regardless of the byte alignment of the pointer.
*/
#define phtons(p, v) \
{ \
((guint8*)(p))[0] = (guint8)((v) >> 8); \
((guint8*)(p))[1] = (guint8)((v) >> 0); \
}
#define phtonl(p, v) \
{ \
((guint8*)(p))[0] = (guint8)((v) >> 24); \
((guint8*)(p))[1] = (guint8)((v) >> 16); \
((guint8*)(p))[2] = (guint8)((v) >> 8); \
((guint8*)(p))[3] = (guint8)((v) >> 0); \
}
/* Macros to byte-swap 32-bit and 16-bit quantities. */
#define BSWAP32(x) \
((((x)&0xFF000000)>>24) | \
(((x)&0x00FF0000)>>8) | \
(((x)&0x0000FF00)<<8) | \
(((x)&0x000000FF)<<24))
#define BSWAP16(x) \
((((x)&0xFF00)>>8) | \
(((x)&0x00FF)<<8))
/* Turn host-byte-order values into little-endian values. */
#define htoles(s) GUINT16_TO_LE(s)
#define htolel(l) GUINT32_TO_LE(l)
#endif /* PINT_H */
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