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/*****************************************************************************
Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
more contributor license agreements. See the NOTICE file distributed
with this work for additional information regarding copyright ownership.
Accellera licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with the
License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. See the License for the specific language governing
permissions and limitations under the License.
*****************************************************************************/
/* ---------------------------------------------------------------------------------------
@file tlm_helpers.h
@brief
Original Authors:
Charles Wilson, ESLX
--------------------------------------------------------------------------------------- */
#ifndef __TLM_HELPERS_H__
#define __TLM_HELPERS_H__
//#include <sys/param.h>
//#include <cstring>
namespace tlm {
enum tlm_endianness { TLM_UNKNOWN_ENDIAN, TLM_LITTLE_ENDIAN, TLM_BIG_ENDIAN };
inline tlm_endianness get_host_endianness(void)
{
static tlm_endianness host_endianness = TLM_UNKNOWN_ENDIAN;
if (host_endianness == TLM_UNKNOWN_ENDIAN) {
unsigned int number = 1;
unsigned char *p_msb_or_lsb = (unsigned char*)&number;
host_endianness = (p_msb_or_lsb[0] == 0) ? TLM_BIG_ENDIAN : TLM_LITTLE_ENDIAN;
}
return host_endianness;
}
inline bool host_has_little_endianness(void)
{
static tlm_endianness host_endianness = TLM_UNKNOWN_ENDIAN;
static bool host_little_endian = false;
if (host_endianness == TLM_UNKNOWN_ENDIAN) {
unsigned int number = 1;
unsigned char *p_msb_or_lsb = (unsigned char*)&number;
host_little_endian = (p_msb_or_lsb[0] == 0) ? false : true;
}
return host_little_endian;
}
inline bool has_host_endianness(tlm_endianness endianness)
{
if (host_has_little_endianness()) {
return endianness == TLM_LITTLE_ENDIAN;
} else {
return endianness == TLM_BIG_ENDIAN;
}
}
} // namespace tlm
#endif /* __TLM_HELPERS_H__ */
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