libgphoto2 photo camera library (libgphoto2) API
2.4.14
Main Page
Related Pages
Data Structures
Files
File List
Globals
gphoto2-endian.h
1
/* This file is generated automatically by configure */
2
/* It is valid only for the system type i486-pc-linux-gnu */
3
4
#ifndef __BYTEORDER_H
5
#define __BYTEORDER_H
6
7
/* ntohl and relatives live here */
8
#include <arpa/inet.h>
9
10
/* Define generic byte swapping functions */
11
#include <byteswap.h>
12
#define swap16(x) bswap_16(x)
13
#define swap32(x) bswap_32(x)
14
#define swap64(x) bswap_64(x)
15
16
/* The byte swapping macros have the form: */
17
/* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
18
/* le (little-endian), NN is 16 or 32 (number of bits) and a, */
19
/* if present, indicates that the endian side is a pointer to an */
20
/* array of uint8_t bytes instead of an integer of the specified length. */
21
/* h refers to the host's ordering method. */
22
23
/* So, to convert a 32-bit integer stored in a buffer in little-endian */
24
/* format into a uint32_t usable on this machine, you could use: */
25
/* uint32_t value = le32atoh(&buf[3]); */
26
/* To put that value back into the buffer, you could use: */
27
/* htole32a(&buf[3], value); */
28
29
/* Define aliases for the standard byte swapping macros */
30
/* Arguments to these macros must be properly aligned on natural word */
31
/* boundaries in order to work properly on all architectures */
32
#ifndef htobe16
33
# define htobe16(x) htons(x)
34
#endif
35
#ifndef htobe32
36
# define htobe32(x) htonl(x)
37
#endif
38
#ifndef be16toh
39
# define be16toh(x) ntohs(x)
40
#endif
41
#ifndef be32toh
42
# define be32toh(x) ntohl(x)
43
#endif
44
45
#define HTOBE16(x) (x) = htobe16(x)
46
#define HTOBE32(x) (x) = htobe32(x)
47
#define BE32TOH(x) (x) = be32toh(x)
48
#define BE16TOH(x) (x) = be16toh(x)
49
50
/* On little endian machines, these macros are null */
51
#ifndef htole16
52
# define htole16(x) (x)
53
#endif
54
#ifndef htole32
55
# define htole32(x) (x)
56
#endif
57
#ifndef htole64
58
# define htole64(x) (x)
59
#endif
60
#ifndef le16toh
61
# define le16toh(x) (x)
62
#endif
63
#ifndef le32toh
64
# define le32toh(x) (x)
65
#endif
66
#ifndef le64toh
67
# define le64toh(x) (x)
68
#endif
69
70
#define HTOLE16(x) (void) (x)
71
#define HTOLE32(x) (void) (x)
72
#define HTOLE64(x) (void) (x)
73
#define LE16TOH(x) (void) (x)
74
#define LE32TOH(x) (void) (x)
75
#define LE64TOH(x) (void) (x)
76
77
/* These don't have standard aliases */
78
#ifndef htobe64
79
# define htobe64(x) swap64(x)
80
#endif
81
#ifndef be64toh
82
# define be64toh(x) swap64(x)
83
#endif
84
85
#define HTOBE64(x) (x) = htobe64(x)
86
#define BE64TOH(x) (x) = be64toh(x)
87
88
/* Define the C99 standard length-specific integer types */
89
#include <_stdint.h>
90
91
/* Here are some macros to create integers from a byte array */
92
/* These are used to get and put integers from/into a uint8_t array */
93
/* with a specific endianness. This is the most portable way to generate */
94
/* and read messages to a network or serial device. Each member of a */
95
/* packet structure must be handled separately. */
96
97
/* The i386 and compatibles can handle unaligned memory access, */
98
/* so use the optimized macros above to do this job */
99
#ifndef be16atoh
100
# define be16atoh(x) be16toh(*(uint16_t*)(x))
101
#endif
102
#ifndef be32atoh
103
# define be32atoh(x) be32toh(*(uint32_t*)(x))
104
#endif
105
#ifndef be64atoh
106
# define be64atoh(x) be64toh(*(uint64_t*)(x))
107
#endif
108
#ifndef le16atoh
109
# define le16atoh(x) le16toh(*(uint16_t*)(x))
110
#endif
111
#ifndef le32atoh
112
# define le32atoh(x) le32toh(*(uint32_t*)(x))
113
#endif
114
#ifndef le64atoh
115
# define le64atoh(x) le64toh(*(uint64_t*)(x))
116
#endif
117
118
#ifndef htob16a
119
# define htobe16a(a,x) *(uint16_t*)(a) = htobe16(x)
120
#endif
121
#ifndef htobe32a
122
# define htobe32a(a,x) *(uint32_t*)(a) = htobe32(x)
123
#endif
124
#ifndef htobe64a
125
# define htobe64a(a,x) *(uint64_t*)(a) = htobe64(x)
126
#endif
127
#ifndef htole16a
128
# define htole16a(a,x) *(uint16_t*)(a) = htole16(x)
129
#endif
130
#ifndef htole32a
131
# define htole32a(a,x) *(uint32_t*)(a) = htole32(x)
132
#endif
133
#ifndef htole64a
134
# define htole64a(a,x) *(uint64_t*)(a) = htole64(x)
135
#endif
136
137
#endif
/*__BYTEORDER_H*/
libgphoto2
gphoto2-endian.h
Generated on Thu Mar 20 2014 08:53:15 for libgphoto2 photo camera library (libgphoto2) API by
1.8.1.2