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1 /*
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2 * Copyright (C) 2004 Steve Harris
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3 *
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4 * This program is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Lesser General Public License
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6 * as published by the Free Software Foundation; either version 2.1
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7 * of the License, or (at your option) any later version.
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8 *
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9 * This program is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 * GNU Lesser General Public License for more details.
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13 *
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14 * $Id$
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15 */
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16
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17 #ifndef LO_ENDIAN_H
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18 #define LO_ENDIAN_H
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19
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20 #include <sys/types.h>
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21 #include <stdint.h>
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22
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23 #ifdef WIN32
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24 #include <winsock2.h>
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25 #include <ws2tcpip.h>
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26 #else
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27 #include <netinet/in.h>
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28 #endif
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29
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30 #ifdef __cplusplus
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31 extern "C" {
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32 #endif
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33
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34 #define lo_swap16(x) htons(x)
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35
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36 #define lo_swap32(x) htonl(x)
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37
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38 /* These macros come from the Linux kernel */
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39
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40 #ifndef lo_swap16
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41 #define lo_swap16(x) \
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42 ({ \
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43 uint16_t __x = (x); \
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44 ((uint16_t)( \
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45 (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
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46 (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
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47 })
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48 #warning USING UNOPTIMISED ENDIAN STUFF
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49 #endif
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50
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51 #ifndef lo_swap32
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52 #define lo_swap32(x) \
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53 ({ \
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54 uint32_t __x = (x); \
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55 ((uint32_t)( \
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56 (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
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57 (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
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58 (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
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59 (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
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60 })
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61 #endif
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62
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63 #if 0
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64 #ifndef lo_swap64
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65 #define lo_swap64(x) \
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66 ({ \
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67 uint64_t __x = (x); \
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68 ((uint64_t)( \
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69 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
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70 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
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71 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
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72 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
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73 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
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74 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
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75 (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
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76 (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
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77 })
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78 #endif
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79 #else
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80
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81 typedef union {
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82 uint64_t all;
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83 struct {
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84 uint32_t a;
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85 uint32_t b;
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86 } part;
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87 } lo_split64;
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88
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89 static inline uint64_t lo_swap64(uint64_t x)
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90 {
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91 lo_split64 in, out;
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92
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93 in.all = x;
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94 out.part.a = lo_swap32(in.part.b);
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95 out.part.b = lo_swap32(in.part.a);
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96
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97 return out.all;
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98 }
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99 #endif
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100
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101 /* Host to OSC and OSC to Host conversion macros */
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102
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103 #if @LO_BIGENDIAN@
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104 #define lo_htoo16(x) (x)
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105 #define lo_htoo32(x) (x)
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106 #define lo_htoo64(x) (x)
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107 #define lo_otoh16(x) (x)
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108 #define lo_otoh32(x) (x)
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109 #define lo_otoh64(x) (x)
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110 #else
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111 #define lo_htoo16 lo_swap16
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112 #define lo_htoo32 lo_swap32
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113 #define lo_htoo64 lo_swap64
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114 #define lo_otoh16 lo_swap16
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115 #define lo_otoh32 lo_swap32
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116 #define lo_otoh64 lo_swap64
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117 #endif
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118
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119 #ifdef __cplusplus
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120 }
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121 #endif
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122
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123 #endif
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124
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125 /* vi:set ts=8 sts=4 sw=4: */
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