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Diffstat (limited to 'epan/pint.h')
| -rw-r--r-- | epan/pint.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/epan/pint.h b/epan/pint.h new file mode 100644 index 0000000000..38f9201ffc --- /dev/null +++ b/epan/pint.h @@ -0,0 +1,115 @@ +/* pint.h + * Definitions for extracting and translating integers safely and portably + * via pointers. + * + * $Id: pint.h,v 1.1 2000/09/27 04:54:50 gram Exp $ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@zing.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef __PINT_H__ +#define __PINT_H__ + +#include <glib.h> + +/* Pointer versions of ntohs and 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. + * + * If G_HAVE_GINT64 is defined, so we can use "gint64" and "guint64" to + * refer to 64-bit integral quantities, we also provide pntohll and + * phtolell, which extract 64-bit integral quantities. + */ + +#define pntohs(p) ((guint16) \ + ((guint16)*((guint8 *)(p)+0)<<8| \ + (guint16)*((guint8 *)(p)+1)<<0)) + +#define pntoh24(p) ((guint32)*((guint8 *)(p)+0)<<16| \ + (guint32)*((guint8 *)(p)+1)<<8| \ + (guint32)*((guint8 *)(p)+2)<<0) + +#define pntohl(p) ((guint32)*((guint8 *)(p)+0)<<24| \ + (guint32)*((guint8 *)(p)+1)<<16| \ + (guint32)*((guint8 *)(p)+2)<<8| \ + (guint32)*((guint8 *)(p)+3)<<0) + +#ifdef G_HAVE_GINT64 +#define pntohll(p) ((guint64)*((guint8 *)(p)+0)<<56| \ + (guint64)*((guint8 *)(p)+1)<<48| \ + (guint64)*((guint8 *)(p)+2)<<40| \ + (guint64)*((guint8 *)(p)+3)<<32| \ + (guint64)*((guint8 *)(p)+4)<<24| \ + (guint64)*((guint8 *)(p)+5)<<16| \ + (guint64)*((guint8 *)(p)+6)<<8| \ + (guint64)*((guint8 *)(p)+7)<<0) +#endif + +#define pletohs(p) ((guint16) \ + ((guint16)*((guint8 *)(p)+1)<<8| \ + (guint16)*((guint8 *)(p)+0)<<0)) + +#define pletoh24(p) ((guint32)*((guint8 *)(p)+2)<<16| \ + (guint32)*((guint8 *)(p)+1)<<8| \ + (guint32)*((guint8 *)(p)+0)<<0) + +#define pletohl(p) ((guint32)*((guint8 *)(p)+3)<<24| \ + (guint32)*((guint8 *)(p)+2)<<16| \ + (guint32)*((guint8 *)(p)+1)<<8| \ + (guint32)*((guint8 *)(p)+0)<<0) + +#ifdef G_HAVE_GINT64 +#define pletohll(p) ((guint64)*((guint8 *)(p)+7)<<56| \ + (guint64)*((guint8 *)(p)+6)<<48| \ + (guint64)*((guint8 *)(p)+5)<<40| \ + (guint64)*((guint8 *)(p)+4)<<32| \ + (guint64)*((guint8 *)(p)+3)<<24| \ + (guint64)*((guint8 *)(p)+2)<<16| \ + (guint64)*((guint8 *)(p)+1)<<8| \ + (guint64)*((guint8 *)(p)+0)<<0) +#endif + + +/* 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. */ +#ifdef WORDS_BIGENDIAN +#define htoles(s) ((guint16) \ + ((guint16)((s) & 0x00FF)<<8| \ + (guint16)((s) & 0xFF00)>>8)) + +#define htolel(l) ((guint32)((l) & 0x000000FF)<<24| \ + (guint32)((l) & 0x0000FF00)<<8| \ + (guint32)((l) & 0x00FF0000)>>8| \ + (guint32)((l) & 0xFF000000)>>24) +#else +#define htoles(s) (s) +#define htolel(l) (l) +#endif + +#endif /* PINT_H */ |