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  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #include <glib.h>
  15 #include "packet-ppi-geolocation-common.h"
  16
  17 /*
  18  * input: a unsigned 32-bit (native endian) value between 0 and 3600000000 (inclusive)
  19  * output: a signed floating point value between -180.0000000 and + 180.0000000, inclusive)
  20  */
  21 double ppi_fixed3_7_to_double(uint32_t in) {
  22     int32_t remapped_in = in - (180 * 10000000);
  23     double ret = (double) ((double) remapped_in / 10000000);
  24     return ret;
  25 }
  26 /*
  27  * input: a native 32 bit unsigned value between 0 and 999999999
  28  * output: a positive floating point value between 000.0000000 and 999.9999999
  29  */
  30
  31 double ppi_fixed3_6_to_double(uint32_t in) {
  32     double ret = (double) in  / 1000000.0;
  33     return ret;
  34
  35 }
  36 /*
  37  * input: a native 32 bit unsigned value between 0 and 3600000000
  38  * output: a signed floating point value between -180000.0000 and +180000.0000
  39  */
  40 double ppi_fixed6_4_to_double(uint32_t in) {
  41     int32_t remapped_in = in - (180000 * 10000);
  42     double ret = (double) ((double) remapped_in / 10000);
  43     return ret;
  44 }
  45
  46 double ppi_ns_counter_to_double(uint32_t in) {
  47     double ret;
  48     ret = (double) in / 1000000000;
  49     return ret;
  50 }
  51
  52 /*
  53  * Editor modelines
  54  *
  55  * Local Variables:
  56  * c-basic-offset: 4
  57  * tab-width: 8
  58  * indent-tabs-mode: nil
  59  * End:
  60  *
  61  * ex: set shiftwidth=4 tabstop=8 expandtab:
  62  * :indentSize=4:tabSize=8:noTabs=true:
  63  */