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/* type_util.c
* Types utility routines
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <glib.h>
#include "type_util.h"
/*
* uint64_t to double conversions taken from gstutils.c of GStreamer project
*
* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2002 Thomas Vander Stichele <thomas@apestaart.org>
*
* gstutils.h: Header for various utility functions
*
* GNU GPL v2
*
*/
/* work around error C2520: conversion from unsigned __int64 to double
* not implemented, use signed __int64
*
* These are implemented as functions because on some platforms a 64bit int to
* double conversion is not defined/implemented.
*/
double
type_util_guint64_to_gdouble(uint64_t value)
{
if (value & G_GUINT64_CONSTANT (0x8000000000000000))
return (double) ((int64_t) value) + (double) 18446744073709551616.;
else
return (double) ((int64_t) value);
}
uint64_t
type_util_gdouble_to_guint64(double value)
{
if (value < (double) 9223372036854775808.) /* 1 << 63 */
return ((uint64_t) ((int64_t) value));
value -= (double) 18446744073709551616.;
return ((uint64_t) ((int64_t) value));
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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