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