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3  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
4  more contributor license agreements.  See the NOTICE file distributed
5  with this work for additional information regarding copyright ownership.
6  Accellera licenses this file to you under the Apache License, Version 2.0
7  (the "License"); you may not use this file except in compliance with the
8  License.  You may obtain a copy of the License at
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10    http://www.apache.org/licenses/LICENSE-2.0
11
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13  distributed under the License is distributed on an "AS IS" BASIS,
14  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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19
20#ifndef __SYSTEMC_EXT_TLM_CORE_2_GENERIC_PAYLOAD_HELPERS_HH__
21#define __SYSTEMC_EXT_TLM_CORE_2_GENERIC_PAYLOAD_HELPERS_HH__
22
23namespace tlm
24{
25
26enum tlm_endianness { TLM_UNKNOWN_ENDIAN, TLM_LITTLE_ENDIAN, TLM_BIG_ENDIAN };
27
28inline tlm_endianness
29get_host_endianness()
30{
31    static tlm_endianness host_endianness = TLM_UNKNOWN_ENDIAN;
32
33    if (host_endianness == TLM_UNKNOWN_ENDIAN) {
34        unsigned int number = 1;
35        unsigned char *p_msb_or_lsb = (unsigned char *)&number;
36        host_endianness = (p_msb_or_lsb[0] == 0) ?
37            TLM_BIG_ENDIAN : TLM_LITTLE_ENDIAN;
38    }
39    return host_endianness;
40}
41
42inline bool
43host_has_little_endianness()
44{
45    static tlm_endianness host_endianness = TLM_UNKNOWN_ENDIAN;
46    static bool host_little_endian = false;
47
48    if (host_endianness == TLM_UNKNOWN_ENDIAN) {
49        unsigned int number = 1;
50        unsigned char *p_msb_or_lsb = (unsigned char *)&number;
51
52        host_little_endian = (p_msb_or_lsb[0] == 0) ? false : true;
53    }
54
55    return host_little_endian;
56}
57
58inline bool
59has_host_endianness(tlm_endianness endianness)
60{
61    if (host_has_little_endianness()) {
62        return endianness == TLM_LITTLE_ENDIAN;
63    } else {
64        return endianness == TLM_BIG_ENDIAN;
65    }
66}
67
68} // namespace tlm
69
70#endif /* __SYSTEMC_EXT_TLM_CORE_2_GENERIC_PAYLOAD_HELPERS_HH__ */
71