libgphoto2 photo camera library (libgphoto2) API: libgphoto2/gphoto2-endian.h Source File

libgphoto2 photo camera library (libgphoto2) API 2.5.2

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gphoto2-endian.h
1 /* This file is generated automatically by configure */
2 /* It is valid only for the system type x86_64-slackware-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 /* Non-optimized but portable macros */
98 #define be16atoh(x) ((uint16_t)(((x)[0]<<8)|(x)[1]))
99 #define be32atoh(x) ((uint32_t)(((x)[0]<<24)|((x)[1]<<16)|((x)[2]<<8)|(x)[3]))
100 #define be64atoh_x(x,off,shift) (((uint64_t)((x)[off]))<<shift)
101 #define be64atoh(x) ((uint64_t)(be64atoh_x(x,0,56)|be64atoh_x(x,1,48)|be64atoh_x(x,2,40)| \
102 be64atoh_x(x,3,32)|be64atoh_x(x,4,24)|be64atoh_x(x,5,16)|be64atoh_x(x,6,8)|((x)[7])))
103 #define le16atoh(x) ((uint16_t)(((x)[1]<<8)|(x)[0]))
104 #define le32atoh(x) ((uint32_t)(((x)[3]<<24)|((x)[2]<<16)|((x)[1]<<8)|(x)[0]))
105 #define le64atoh_x(x,off,shift) (((uint64_t)(x)[off])<<shift)
106 #define le64atoh(x) ((uint64_t)(le64atoh_x(x,7,56)|le64atoh_x(x,6,48)|le64atoh_x(x,5,40)| \
107 le64atoh_x(x,4,32)|le64atoh_x(x,3,24)|le64atoh_x(x,2,16)|le64atoh_x(x,1,8)|((x)[0])))
108
109 #define htobe16a(a,x) (a)[0]=(uint8_t)((x)>>8), (a)[1]=(uint8_t)(x)
110 #define htobe32a(a,x) (a)[0]=(uint8_t)((x)>>24), (a)[1]=(uint8_t)((x)>>16), \
111 (a)[2]=(uint8_t)((x)>>8), (a)[3]=(uint8_t)(x)
112 #define htobe64a(a,x) (a)[0]=(uint8_t)((x)>>56), (a)[1]=(uint8_t)((x)>>48), \
113 (a)[2]=(uint8_t)((x)>>40), (a)[3]=(uint8_t)((x)>>32), \
114 (a)[4]=(uint8_t)((x)>>24), (a)[5]=(uint8_t)((x)>>16), \
115 (a)[6]=(uint8_t)((x)>>8), (a)[7]=(uint8_t)(x)
116 #define htole16a(a,x) (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
117 #define htole32a(a,x) (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
118 (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
119 #define htole64a(a,x) (a)[7]=(uint8_t)((x)>>56), (a)[6]=(uint8_t)((x)>>48), \
120 (a)[5]=(uint8_t)((x)>>40), (a)[4]=(uint8_t)((x)>>32), \
121 (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
122 (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
123
124 #endif /*__BYTEORDER_H*/