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/** @file
*
* Definitions for extracting and translating integers safely and portably
* via pointers.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PINT_H__
#define __PINT_H__
#include <glib.h>
/* Routines that take a possibly-unaligned pointer to a 16-bit, 24-bit,
* 32-bit, 40-bit, ... 64-bit integral quantity, in a particular byte
* order, and fetch the value and return it in host byte order.
*
* The pntohN() routines fetch big-endian values; the pletohN() routines
* fetch little-endian values.
*/
static inline guint16 pntoh16(const void *p)
{
return (guint16)*((const guint8 *)(p)+0)<<8|
(guint16)*((const guint8 *)(p)+1)<<0;
}
static inline guint32 pntoh24(const void *p)
{
return (guint32)*((const guint8 *)(p)+0)<<16|
(guint32)*((const guint8 *)(p)+1)<<8|
(guint32)*((const guint8 *)(p)+2)<<0;
}
static inline guint32 pntoh32(const void *p)
{
return (guint32)*((const guint8 *)(p)+0)<<24|
(guint32)*((const guint8 *)(p)+1)<<16|
(guint32)*((const guint8 *)(p)+2)<<8|
(guint32)*((const guint8 *)(p)+3)<<0;
}
static inline guint64 pntoh40(const void *p)
{
return (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;
}
static inline guint64 pntoh48(const void *p)
{
return (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;
}
static inline guint64 pntoh56(const void *p)
{
return (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;
}
static inline guint64 pntoh64(const void *p)
{
return (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;
}
static inline guint16 pletoh16(const void *p)
{
return (guint16)*((const guint8 *)(p)+1)<<8|
(guint16)*((const guint8 *)(p)+0)<<0;
}
static inline guint32 pletoh24(const void *p)
{
return (guint32)*((const guint8 *)(p)+2)<<16|
(guint32)*((const guint8 *)(p)+1)<<8|
(guint32)*((const guint8 *)(p)+0)<<0;
}
static inline guint32 pletoh32(const void *p)
{
return (guint32)*((const guint8 *)(p)+3)<<24|
(guint32)*((const guint8 *)(p)+2)<<16|
(guint32)*((const guint8 *)(p)+1)<<8|
(guint32)*((const guint8 *)(p)+0)<<0;
}
static inline guint64 pletoh40(const void *p)
{
return (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;
}
static inline guint64 pletoh48(const void *p)
{
return (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;
}
static inline guint64 pletoh56(const void *p)
{
return (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;
}
static inline guint64 pletoh64(const void *p)
{
return (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.
*/
static inline void phton16(guint8 *p, guint16 v)
{
p[0] = (guint8)(v >> 8);
p[1] = (guint8)(v >> 0);
}
static inline void phton32(guint8 *p, guint32 v)
{
p[0] = (guint8)(v >> 24);
p[1] = (guint8)(v >> 16);
p[2] = (guint8)(v >> 8);
p[3] = (guint8)(v >> 0);
}
static inline void phton64(guint8 *p, guint64 v) {
p[0] = (guint8)(v >> 56);
p[1] = (guint8)(v >> 48);
p[2] = (guint8)(v >> 40);
p[3] = (guint8)(v >> 32);
p[4] = (guint8)(v >> 24);
p[5] = (guint8)(v >> 16);
p[6] = (guint8)(v >> 8);
p[7] = (guint8)(v >> 0);
}
static inline void phtole32(guint8 *p, guint32 v) {
p[0] = (guint8)(v >> 0);
p[1] = (guint8)(v >> 8);
p[2] = (guint8)(v >> 16);
p[3] = (guint8)(v >> 24);
}
static inline void phtole64(guint8 *p, guint64 v) {
p[0] = (guint8)(v >> 0);
p[1] = (guint8)(v >> 8);
p[2] = (guint8)(v >> 16);
p[3] = (guint8)(v >> 24);
p[4] = (guint8)(v >> 32);
p[5] = (guint8)(v >> 40);
p[6] = (guint8)(v >> 48);
p[7] = (guint8)(v >> 56);
}
/* Subtract two guint32s with respect to wraparound */
#define guint32_wraparound_diff(higher, lower) ((higher>lower)?(higher-lower):(higher+0xffffffff-lower+1))
#endif /* PINT_H */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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