1//=========================================================================
2// FILENAME	: misc.c
3// DESCRIPTION	: Miscelleneous funcs
4//=========================================================================
5// Copyright (c) 2008- NETGEAR, Inc. All Rights Reserved.
6//=========================================================================
7
8/* This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#include <stdio.h>
23#include <string.h>
24#include <endian.h>
25
26#include "misc.h"
27
28inline __u16
29le16_to_cpu(__u16 le16)
30{
31#if __BYTE_ORDER == __LITTLE_ENDIAN
32	return le16;
33#else
34	__u16 be16 = ((le16 << 8) & 0xff00) | ((le16 >> 8) & 0x00ff);
35	return be16;
36#endif
37}
38
39inline __u32
40le32_to_cpu(__u32 le32)
41{
42#if __BYTE_ORDER == __LITTLE_ENDIAN
43	return le32;
44#else
45	__u32 be32 =
46		((le32 << 24) & 0xff000000) |
47		((le32 << 8) & 0x00ff0000) |
48		((le32 >> 8) & 0x0000ff00) |
49		((le32 >> 24) & 0x000000ff);
50	return be32;
51#endif
52}
53
54inline __u64
55le64_to_cpu(__u64 le64)
56{
57#if __BYTE_ORDER == __LITTLE_ENDIAN
58	return le64;
59#else
60	__u64 be64;
61	__u8 *le64p = (__u8*)&le64;
62	__u8 *be64p = (__u8*)&be64;
63	be64p[0] = le64p[7];
64	be64p[1] = le64p[6];
65	be64p[2] = le64p[5];
66	be64p[3] = le64p[4];
67	be64p[4] = le64p[3];
68	be64p[5] = le64p[2];
69	be64p[6] = le64p[1];
70	be64p[7] = le64p[0];
71	return be64;
72#endif
73}
74
75inline __u8
76fget_byte(FILE *fp)
77{
78	__u8 d;
79
80	(void)fread(&d, sizeof(d), 1, fp);
81	return d;
82}
83
84inline __u16
85fget_le16(FILE *fp)
86{
87	__u16 d;
88
89	(void)fread(&d, sizeof(d), 1, fp);
90	d = le16_to_cpu(d);
91	return d;
92}
93
94inline __u32
95fget_le32(FILE *fp)
96{
97	__u32 d;
98
99	(void)fread(&d, sizeof(d), 1, fp);
100	d = le32_to_cpu(d);
101	return d;
102}
103
104inline __u32
105cpu_to_be32(__u32 cpu32)
106{
107#if __BYTE_ORDER == __LITTLE_ENDIAN
108	__u32 be32 =
109		((cpu32 << 24) & 0xff000000) |
110		((cpu32 << 8) & 0x00ff0000) |
111		((cpu32 >> 8) & 0x0000ff00) |
112		((cpu32 >> 24) & 0x000000ff);
113	return be32;
114#else
115	return cpu32;
116#endif
117}
118