ReactOS 0.4.15-dev-8632-gbc8c7d1
intcvt.h
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1/* @(#)intcvt.h 1.8 13/10/26 Copyright 1986-2013 J. Schilling */
2/*
3 * Definitions for conversion to/from integer data types of various size.
4 *
5 * Copyright (c) 1986-2013 J. Schilling
6 */
7/*
8 * The contents of this file are subject to the terms of the
9 * Common Development and Distribution License, Version 1.0 only
10 * (the "License"). You may not use this file except in compliance
11 * with the License.
12 *
13 * See the file CDDL.Schily.txt in this distribution for details.
14 * A copy of the CDDL is also available via the Internet at
15 * http://www.opensource.org/licenses/cddl1.txt
16 *
17 * When distributing Covered Code, include this CDDL HEADER in each
18 * file and include the License file CDDL.Schily.txt from this distribution.
19 */
20
21#ifndef _SCHILY_INTCVT_H
22#define _SCHILY_INTCVT_H
23
24#ifndef _SCHILY_MCONFIG_H
25#include <schily/mconfig.h>
26#endif
27#ifndef _SCHILY_UTYPES_H
28#include <schily/utypes.h>
29#endif
30
31#define i_to_2_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 8) & 0xFF,\
32 ((Uchar *)(a))[1] = (i) & 0xFF)
33
34#define i_to_3_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 16)& 0xFF,\
35 ((Uchar *)(a))[1] = ((i) >> 8) & 0xFF,\
36 ((Uchar *)(a))[2] = (i) & 0xFF)
37
38#define i_to_4_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 24)& 0xFF,\
39 ((Uchar *)(a))[1] = ((i) >> 16)& 0xFF,\
40 ((Uchar *)(a))[2] = ((i) >> 8) & 0xFF,\
41 ((Uchar *)(a))[3] = (i) & 0xFF)
42
43
44
45#define a_to_byte(a) (((Int8_t *)a)[0])
46
47#define a_to_u_byte(a) ((UInt8_t) \
48 (((Uchar *)a)[0] & 0xFF))
49
50#define a_to_u_2_byte(a) ((UInt16_t) \
51 ((((Uchar *)a)[1] & 0xFF) | \
52 (((Uchar *)a)[0] << 8 & 0xFF00)))
53
54#define a_to_2_byte(a) (int)(Int16_t)a_to_u_2_byte(a)
55
56#define a_to_u_3_byte(a) ((Ulong) \
57 ((((Uchar *)a)[2] & 0xFF) | \
58 (((Uchar *)a)[1] << 8 & 0xFF00) | \
59 (((Uchar *)a)[0] << 16 & 0xFF0000)))
60
61#define a_to_3_byte(a) a_to_u_3_byte(a) /* XXX signed version? */
62
63#ifdef __STDC__
64# define __TOP_4BYTE 0xFF000000UL
65#else
66# define __TOP_4BYTE 0xFF000000
67#endif
68
69#define a_to_u_4_byte(a) ((Ulong) \
70 ((((Uchar*)a)[3] & 0xFF) | \
71 (((Uchar*)a)[2] << 8 & 0xFF00) | \
72 (((Uchar*)a)[1] << 16 & 0xFF0000) | \
73 (((Uchar*)a)[0] << 24 & __TOP_4BYTE)))
74
75#define a_to_4_byte(a) (long)(Int32_t)a_to_u_4_byte(a)
76
77/*
78 * Little Endian versions of above macros
79 */
80#define li_to_2_byte(a, i) (((Uchar *)(a))[1] = ((i) >> 8) & 0xFF,\
81 ((Uchar *)(a))[0] = (i) & 0xFF)
82
83#define li_to_3_byte(a, i) (((Uchar *)(a))[2] = ((i) >> 16)& 0xFF,\
84 ((Uchar *)(a))[1] = ((i) >> 8) & 0xFF,\
85 ((Uchar *)(a))[0] = (i) & 0xFF)
86
87#define li_to_4_byte(a, i) (((Uchar *)(a))[3] = ((i) >> 24)& 0xFF,\
88 ((Uchar *)(a))[2] = ((i) >> 16)& 0xFF,\
89 ((Uchar *)(a))[1] = ((i) >> 8) & 0xFF,\
90 ((Uchar *)(a))[0] = (i) & 0xFF)
91
92
93#define la_to_u_2_byte(a) ((UInt16_t) \
94 ((((Uchar*)a)[0] & 0xFF) | \
95 (((Uchar*)a)[1] << 8 & 0xFF00)))
96
97#define la_to_2_byte(a) (int)(Int16_t)la_to_u_2_byte(a)
98
99#define la_to_u_3_byte(a) ((Ulong) \
100 ((((Uchar*)a)[0] & 0xFF) | \
101 (((Uchar*)a)[1] << 8 & 0xFF00) | \
102 (((Uchar*)a)[2] << 16 & 0xFF0000)))
103
104#define la_to_3_byte(a) la_to_u_3_byte(a) /* XXX signed version? */
105
106#define la_to_u_4_byte(a) ((Ulong) \
107 ((((Uchar*)a)[0] & 0xFF) | \
108 (((Uchar*)a)[1] << 8 & 0xFF00) | \
109 (((Uchar*)a)[2] << 16 & 0xFF0000) | \
110 (((Uchar*)a)[3] << 24 & __TOP_4BYTE)))
111
112#define la_to_4_byte(a) (long)(Int32_t)la_to_u_4_byte(a)
113
114#endif /* _SCHILY_INTCVT_H */