libmtp  1.1.6
gphoto2-endian.h
1 /* This file is generated automatically by configure */
2 /* It is valid only for the system type i386-unknown-openbsd5.5 */
3 
4 #ifndef __BYTEORDER_H
5 #define __BYTEORDER_H
6 
7 /* ntohl and relatives live here */
8 #include <arpa/inet.h>
9 
10 /* swap32 and swap16 are defined in machine/endian.h */
11 
12 /* The byte swapping macros have the form: */
13 /* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
14 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */
15 /* if present, indicates that the endian side is a pointer to an */
16 /* array of uint8_t bytes instead of an integer of the specified length. */
17 /* h refers to the host's ordering method. */
18 
19 /* So, to convert a 32-bit integer stored in a buffer in little-endian */
20 /* format into a uint32_t usable on this machine, you could use: */
21 /* uint32_t value = le32atoh(&buf[3]); */
22 /* To put that value back into the buffer, you could use: */
23 /* htole32a(&buf[3], value); */
24 
25 /* Define aliases for the standard byte swapping macros */
26 /* Arguments to these macros must be properly aligned on natural word */
27 /* boundaries in order to work properly on all architectures */
28 #ifndef htobe16
29 # define htobe16(x) htons(x)
30 #endif
31 #ifndef htobe32
32 # define htobe32(x) htonl(x)
33 #endif
34 #ifndef be16toh
35 # define be16toh(x) ntohs(x)
36 #endif
37 #ifndef be32toh
38 # define be32toh(x) ntohl(x)
39 #endif
40 
41 #define HTOBE16(x) (x) = htobe16(x)
42 #define HTOBE32(x) (x) = htobe32(x)
43 #define BE32TOH(x) (x) = be32toh(x)
44 #define BE16TOH(x) (x) = be16toh(x)
45 
46 /* On little endian machines, these macros are null */
47 #ifndef htole16
48 # define htole16(x) (x)
49 #endif
50 #ifndef htole32
51 # define htole32(x) (x)
52 #endif
53 #ifndef htole64
54 # define htole64(x) (x)
55 #endif
56 #ifndef le16toh
57 # define le16toh(x) (x)
58 #endif
59 #ifndef le32toh
60 # define le32toh(x) (x)
61 #endif
62 #ifndef le64toh
63 # define le64toh(x) (x)
64 #endif
65 
66 #define HTOLE16(x) (void) (x)
67 #define HTOLE32(x) (void) (x)
68 #define HTOLE64(x) (void) (x)
69 #define LE16TOH(x) (void) (x)
70 #define LE32TOH(x) (void) (x)
71 #define LE64TOH(x) (void) (x)
72 
73 /* These don't have standard aliases */
74 #ifndef htobe64
75 # define htobe64(x) swap64(x)
76 #endif
77 #ifndef be64toh
78 # define be64toh(x) swap64(x)
79 #endif
80 
81 #define HTOBE64(x) (x) = htobe64(x)
82 #define BE64TOH(x) (x) = be64toh(x)
83 
84 /* Define the C99 standard length-specific integer types */
85 #include <_stdint.h>
86 
87 /* Here are some macros to create integers from a byte array */
88 /* These are used to get and put integers from/into a uint8_t array */
89 /* with a specific endianness. This is the most portable way to generate */
90 /* and read messages to a network or serial device. Each member of a */
91 /* packet structure must be handled separately. */
92 
93 /* The i386 and compatibles can handle unaligned memory access, */
94 /* so use the optimized macros above to do this job */
95 #ifndef be16atoh
96 # define be16atoh(x) be16toh(*(uint16_t*)(x))
97 #endif
98 #ifndef be32atoh
99 # define be32atoh(x) be32toh(*(uint32_t*)(x))
100 #endif
101 #ifndef be64atoh
102 # define be64atoh(x) be64toh(*(uint64_t*)(x))
103 #endif
104 #ifndef le16atoh
105 # define le16atoh(x) le16toh(*(uint16_t*)(x))
106 #endif
107 #ifndef le32atoh
108 # define le32atoh(x) le32toh(*(uint32_t*)(x))
109 #endif
110 #ifndef le64atoh
111 # define le64atoh(x) le64toh(*(uint64_t*)(x))
112 #endif
113 
114 #ifndef htob16a
115 # define htobe16a(a,x) *(uint16_t*)(a) = htobe16(x)
116 #endif
117 #ifndef htobe32a
118 # define htobe32a(a,x) *(uint32_t*)(a) = htobe32(x)
119 #endif
120 #ifndef htobe64a
121 # define htobe64a(a,x) *(uint64_t*)(a) = htobe64(x)
122 #endif
123 #ifndef htole16a
124 # define htole16a(a,x) *(uint16_t*)(a) = htole16(x)
125 #endif
126 #ifndef htole32a
127 # define htole32a(a,x) *(uint32_t*)(a) = htole32(x)
128 #endif
129 #ifndef htole64a
130 # define htole64a(a,x) *(uint64_t*)(a) = htole64(x)
131 #endif
132 
133 #endif /*__BYTEORDER_H*/