epan/dissectors/packet-ppi-geolocation-common.c

   1 /* packet-ppi-geolocation-common.c
   2  * Routines for PPI-GEOLOCATION  dissection
   3  * Copyright 2010, Harris Corp, jellch@harris.com
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <glib.h>
  29 #include "packet-ppi-geolocation-common.h"
  30
  31 /*
  32  * input: a unsigned 32-bit (native endian) value between 0 and 3600000000 (inclusive)
  33  * output: a signed floating point value betwen -180.0000000 and + 180.0000000, inclusive)
  34  */
  35 gdouble ppi_fixed3_7_to_gdouble(guint32 in) {
  36     gint32 remapped_in = in - (180 * 10000000);
  37     gdouble ret = (gdouble) ((gdouble) remapped_in / 10000000);
  38     return ret;
  39 }
  40 /*
  41  * input: a native 32 bit unsigned value between 0 and 999999999
  42  * output: a positive floating point value between 000.0000000 and 999.9999999
  43  */
  44
  45 gdouble ppi_fixed3_6_to_gdouble(guint32 in) {
  46     gdouble ret = (gdouble) in  / 1000000.0;
  47     return ret;
  48
  49 }
  50 /*
  51  * input: a native 32 bit unsigned value between 0 and 3600000000
  52  * output: a signed floating point value between -180000.0000 and +180000.0000
  53  */
  54 gdouble ppi_fixed6_4_to_gdouble(guint32 in) {
  55     gint32 remapped_in = in - (180000 * 10000);
  56     gdouble ret = (gdouble) ((gdouble) remapped_in / 10000);
  57     return ret;
  58 }
  59
  60 gdouble ppi_ns_counter_to_gdouble(guint32 in) {
  61     gdouble ret;
  62     ret = (gdouble) in / 1000000000;
  63     return ret;
  64 }
  65
  66 /*
  67  * Editor modelines
  68  *
  69  * Local Variables:
  70  * c-basic-offset: 4
  71  * tab-width: 8
  72  * indent-tabs-mode: nil
  73  * End:
  74  *
  75  * ex: set shiftwidth=4 tabstop=8 expandtab:
  76  * :indentSize=4:tabSize=8:noTabs=true:
  77  */