First step in moving core Ethereal routines to libepan.

svn path=/trunk/; revision=2458

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 */