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

libgphoto2 photo camera library (libgphoto2) API 2.5.10

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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 #define __HAVE_NTOHL
10
11 /* Define generic byte swapping functions */
12 #include <byteswap.h>
13 #define swap16(x) bswap_16(x)
14 #define swap32(x) bswap_32(x)
15 #define swap64(x) bswap_64(x)
16
17 /* The byte swapping macros have the form: */
18 /* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
19 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */
20 /* if present, indicates that the endian side is a pointer to an */
21 /* array of uint8_t bytes instead of an integer of the specified length. */
22 /* h refers to the host's ordering method. */
23
24 /* So, to convert a 32-bit integer stored in a buffer in little-endian */
25 /* format into a uint32_t usable on this machine, you could use: */
26 /* uint32_t value = le32atoh(&buf[3]); */
27 /* To put that value back into the buffer, you could use: */
28 /* htole32a(&buf[3], value); */
29
30 /* Define aliases for the standard byte swapping macros */
31 /* Arguments to these macros must be properly aligned on natural word */
32 /* boundaries in order to work properly on all architectures */
33 #ifndef htobe16
34 # ifdef __HAVE_NTOHL
35 # define htobe16(x) htons(x)
36 # else
37 # ifdef WORDS_BIGENDIAN
38 # define htobe16(x) (x)
39 # else
40 # define htobe16(x) swap16(x)
41 # endif
42 # endif
43 #endif
44 #ifndef htobe32
45 # ifdef __HAVE_NTOHL
46 # define htobe32(x) htonl(x)
47 # else
48 # ifdef WORDS_BIGENDIAN
49 # define htobe32(x) (x)
50 # else
51 # define htobe32(x) swap32(x)
52 # endif
53 # endif
54 #endif
55 #ifndef be16toh
56 # define be16toh(x) htobe16(x)
57 #endif
58 #ifndef be32toh
59 # define be32toh(x) htobe32(x)
60 #endif
61
62 #define HTOBE16(x) (x) = htobe16(x)
63 #define HTOBE32(x) (x) = htobe32(x)
64 #define BE32TOH(x) (x) = be32toh(x)
65 #define BE16TOH(x) (x) = be16toh(x)
66
67 /* On little endian machines, these macros are null */
68 #ifndef htole16
69 # define htole16(x) (x)
70 #endif
71 #ifndef htole32
72 # define htole32(x) (x)
73 #endif
74 #ifndef htole64
75 # define htole64(x) (x)
76 #endif
77 #ifndef le16toh
78 # define le16toh(x) (x)
79 #endif
80 #ifndef le32toh
81 # define le32toh(x) (x)
82 #endif
83 #ifndef le64toh
84 # define le64toh(x) (x)
85 #endif
86
87 #define HTOLE16(x) (void) (x)
88 #define HTOLE32(x) (void) (x)
89 #define HTOLE64(x) (void) (x)
90 #define LE16TOH(x) (void) (x)
91 #define LE32TOH(x) (void) (x)
92 #define LE64TOH(x) (void) (x)
93
94 /* These don't have standard aliases */
95 #ifndef htobe64
96 # define htobe64(x) swap64(x)
97 #endif
98 #ifndef be64toh
99 # define be64toh(x) swap64(x)
100 #endif
101
102 #define HTOBE64(x) (x) = htobe64(x)
103 #define BE64TOH(x) (x) = be64toh(x)
104
105 /* Define the C99 standard length-specific integer types */
106 #include <_stdint.h>
107
108 /* Here are some macros to create integers from a byte array */
109 /* These are used to get and put integers from/into a uint8_t array */
110 /* with a specific endianness. This is the most portable way to generate */
111 /* and read messages to a network or serial device. Each member of a */
112 /* packet structure must be handled separately. */
113
114 /* Non-optimized but portable macros */
115 #define be16atoh(x) ((uint16_t)(((x)[0]<<8)|(x)[1]))
116 #define be32atoh(x) ((uint32_t)(((x)[0]<<24)|((x)[1]<<16)|((x)[2]<<8)|(x)[3]))
117 #define be64atoh_x(x,off,shift) (((uint64_t)((x)[off]))<<shift)
118 #define be64atoh(x) ((uint64_t)(be64atoh_x(x,0,56)|be64atoh_x(x,1,48)|be64atoh_x(x,2,40)| \
119 be64atoh_x(x,3,32)|be64atoh_x(x,4,24)|be64atoh_x(x,5,16)|be64atoh_x(x,6,8)|((x)[7])))
120 #define le16atoh(x) ((uint16_t)(((x)[1]<<8)|(x)[0]))
121 #define le32atoh(x) ((uint32_t)(((x)[3]<<24)|((x)[2]<<16)|((x)[1]<<8)|(x)[0]))
122 #define le64atoh_x(x,off,shift) (((uint64_t)(x)[off])<<shift)
123 #define le64atoh(x) ((uint64_t)(le64atoh_x(x,7,56)|le64atoh_x(x,6,48)|le64atoh_x(x,5,40)| \
124 le64atoh_x(x,4,32)|le64atoh_x(x,3,24)|le64atoh_x(x,2,16)|le64atoh_x(x,1,8)|((x)[0])))
125
126 #define htobe16a(a,x) (a)[0]=(uint8_t)((x)>>8), (a)[1]=(uint8_t)(x)
127 #define htobe32a(a,x) (a)[0]=(uint8_t)((x)>>24), (a)[1]=(uint8_t)((x)>>16), \
128 (a)[2]=(uint8_t)((x)>>8), (a)[3]=(uint8_t)(x)
129 #define htobe64a(a,x) (a)[0]=(uint8_t)((x)>>56), (a)[1]=(uint8_t)((x)>>48), \
130 (a)[2]=(uint8_t)((x)>>40), (a)[3]=(uint8_t)((x)>>32), \
131 (a)[4]=(uint8_t)((x)>>24), (a)[5]=(uint8_t)((x)>>16), \
132 (a)[6]=(uint8_t)((x)>>8), (a)[7]=(uint8_t)(x)
133 #define htole16a(a,x) (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
134 #define htole32a(a,x) (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
135 (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
136 #define htole64a(a,x) (a)[7]=(uint8_t)((x)>>56), (a)[6]=(uint8_t)((x)>>48), \
137 (a)[5]=(uint8_t)((x)>>40), (a)[4]=(uint8_t)((x)>>32), \
138 (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
139 (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
140
141 #endif /*__BYTEORDER_H*/