forked from osmocom/wireshark
81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/* pint.h
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* Definitions for extracting and translating integers safely and portably
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* via pointers.
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*
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* $Id: pint.h,v 1.8 2003/07/29 20:50:39 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PINT_H__
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#define __PINT_H__
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#include <glib.h>
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/* Pointer versions of g_ntohs and g_ntohl. Given a pointer to a member of a
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* byte array, returns the value of the two or four bytes at the pointer.
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* The pletoh[sl] versions return the little-endian representation.
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*/
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#define pntohs(p) ((guint16) \
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((guint16)*((const guint8 *)(p)+0)<<8| \
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(guint16)*((const guint8 *)(p)+1)<<0))
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#define pntoh24(p) ((guint32)*((const guint8 *)(p)+0)<<16| \
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(guint32)*((const guint8 *)(p)+1)<<8| \
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(guint32)*((const guint8 *)(p)+2)<<0)
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#define pntohl(p) ((guint32)*((const guint8 *)(p)+0)<<24| \
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(guint32)*((const guint8 *)(p)+1)<<16| \
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(guint32)*((const guint8 *)(p)+2)<<8| \
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(guint32)*((const guint8 *)(p)+3)<<0)
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#define pletohs(p) ((guint16) \
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((guint16)*((const guint8 *)(p)+1)<<8| \
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(guint16)*((const guint8 *)(p)+0)<<0))
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#define pletoh24(p) ((guint32)*((const guint8 *)(p)+2)<<16| \
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(guint32)*((const guint8 *)(p)+1)<<8| \
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(guint32)*((const guint8 *)(p)+0)<<0)
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#define pletohl(p) ((guint32)*((const guint8 *)(p)+3)<<24| \
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(guint32)*((const guint8 *)(p)+2)<<16| \
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(guint32)*((const guint8 *)(p)+1)<<8| \
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(guint32)*((const guint8 *)(p)+0)<<0)
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/* Macros to byte-swap 32-bit and 16-bit quantities. */
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#define BSWAP32(x) \
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((((x)&0xFF000000)>>24) | \
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(((x)&0x00FF0000)>>8) | \
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(((x)&0x0000FF00)<<8) | \
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(((x)&0x000000FF)<<24))
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#define BSWAP16(x) \
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((((x)&0xFF00)>>8) | \
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(((x)&0x00FF)<<8))
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/* Turn host-byte-order values into little-endian values. */
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#define htoles(s) GUINT16_TO_LE(s)
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#define htolel(l) GUINT32_TO_LE(l)
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#endif /* PINT_H */
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