libgphoto2 photo camera library (libgphoto2) API  2.5.19
gphoto2-endian.h
1 /* This file is generated automatically by configure */
2 /* It is valid only for the system type x86_64-pc-solaris2.11 */
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 /* Use these as generic byteswapping macros on this little endian system */
12 /* on windows we might not have ntohs / ntohl without including winsock.dll,
13  * so use generic macros */
14 #ifdef __HAVE_NTOHL
15 # define swap16(x) htons(x)
16 # define swap32(x) htonl(x)
17 #else
18 # define swap16(x) ((uint16_t)(((x) << 8) | ((uint16_t)(x) >> 8)))
19 # define swap32(x) ((uint32_t)((((uint32_t)(x) << 24) & 0xff000000UL) | \
20  (((uint32_t)(x) << 8) & 0x00ff0000UL) | \
21  (((x) >> 8) & 0x0000ff00UL) | \
22  (((x) >> 24) & 0x000000ffUL)))
23 #endif
24 /* No optimized 64 bit byte swapping macro is available */
25 #define swap64(x) ((uint64_t)((((uint64_t)(x) << 56) & 0xff00000000000000ULL) | \
26  (((uint64_t)(x) << 40) & 0x00ff000000000000ULL) | \
27  (((uint64_t)(x) << 24) & 0x0000ff0000000000ULL) | \
28  (((uint64_t)(x) << 8) & 0x000000ff00000000ULL) | \
29  (((x) >> 8) & 0x00000000ff000000ULL) | \
30  (((x) >> 24) & 0x0000000000ff0000ULL) | \
31  (((x) >> 40) & 0x000000000000ff00ULL) | \
32  (((x) >> 56) & 0x00000000000000ffULL)))
33 
34 /* The byte swapping macros have the form: */
35 /* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
36 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */
37 /* if present, indicates that the endian side is a pointer to an */
38 /* array of uint8_t bytes instead of an integer of the specified length. */
39 /* h refers to the host's ordering method. */
40 
41 /* So, to convert a 32-bit integer stored in a buffer in little-endian */
42 /* format into a uint32_t usable on this machine, you could use: */
43 /* uint32_t value = le32atoh(&buf[3]); */
44 /* To put that value back into the buffer, you could use: */
45 /* htole32a(&buf[3], value); */
46 
47 /* Define aliases for the standard byte swapping macros */
48 /* Arguments to these macros must be properly aligned on natural word */
49 /* boundaries in order to work properly on all architectures */
50 #ifndef htobe16
51 # ifdef __HAVE_NTOHL
52 # define htobe16(x) htons(x)
53 # else
54 # ifdef WORDS_BIGENDIAN
55 # define htobe16(x) (x)
56 # else
57 # define htobe16(x) swap16(x)
58 # endif
59 # endif
60 #endif
61 #ifndef htobe32
62 # ifdef __HAVE_NTOHL
63 # define htobe32(x) htonl(x)
64 # else
65 # ifdef WORDS_BIGENDIAN
66 # define htobe32(x) (x)
67 # else
68 # define htobe32(x) swap32(x)
69 # endif
70 # endif
71 #endif
72 #ifndef be16toh
73 # define be16toh(x) htobe16(x)
74 #endif
75 #ifndef be32toh
76 # define be32toh(x) htobe32(x)
77 #endif
78 
79 #define HTOBE16(x) (x) = htobe16(x)
80 #define HTOBE32(x) (x) = htobe32(x)
81 #define BE32TOH(x) (x) = be32toh(x)
82 #define BE16TOH(x) (x) = be16toh(x)
83 
84 /* On little endian machines, these macros are null */
85 #ifndef htole16
86 # define htole16(x) (x)
87 #endif
88 #ifndef htole32
89 # define htole32(x) (x)
90 #endif
91 #ifndef htole64
92 # define htole64(x) (x)
93 #endif
94 #ifndef le16toh
95 # define le16toh(x) (x)
96 #endif
97 #ifndef le32toh
98 # define le32toh(x) (x)
99 #endif
100 #ifndef le64toh
101 # define le64toh(x) (x)
102 #endif
103 
104 #define HTOLE16(x) (void) (x)
105 #define HTOLE32(x) (void) (x)
106 #define HTOLE64(x) (void) (x)
107 #define LE16TOH(x) (void) (x)
108 #define LE32TOH(x) (void) (x)
109 #define LE64TOH(x) (void) (x)
110 
111 /* These don't have standard aliases */
112 #ifndef htobe64
113 # define htobe64(x) swap64(x)
114 #endif
115 #ifndef be64toh
116 # define be64toh(x) swap64(x)
117 #endif
118 
119 #define HTOBE64(x) (x) = htobe64(x)
120 #define BE64TOH(x) (x) = be64toh(x)
121 
122 /* Define the C99 standard length-specific integer types */
123 #include <_stdint.h>
124 
125 /* Here are some macros to create integers from a byte array */
126 /* These are used to get and put integers from/into a uint8_t array */
127 /* with a specific endianness. This is the most portable way to generate */
128 /* and read messages to a network or serial device. Each member of a */
129 /* packet structure must be handled separately. */
130 
131 /* Non-optimized but portable macros */
132 #define be16atoh(x) ((uint16_t)(((x)[0]<<8)|(x)[1]))
133 #define be32atoh(x) ((uint32_t)(((x)[0]<<24)|((x)[1]<<16)|((x)[2]<<8)|(x)[3]))
134 #define be64atoh_x(x,off,shift) (((uint64_t)((x)[off]))<<shift)
135 #define be64atoh(x) ((uint64_t)(be64atoh_x(x,0,56)|be64atoh_x(x,1,48)|be64atoh_x(x,2,40)| \
136  be64atoh_x(x,3,32)|be64atoh_x(x,4,24)|be64atoh_x(x,5,16)|be64atoh_x(x,6,8)|((x)[7])))
137 #define le16atoh(x) ((uint16_t)(((x)[1]<<8)|(x)[0]))
138 #define le32atoh(x) ((uint32_t)(((x)[3]<<24)|((x)[2]<<16)|((x)[1]<<8)|(x)[0]))
139 #define le64atoh_x(x,off,shift) (((uint64_t)(x)[off])<<shift)
140 #define le64atoh(x) ((uint64_t)(le64atoh_x(x,7,56)|le64atoh_x(x,6,48)|le64atoh_x(x,5,40)| \
141  le64atoh_x(x,4,32)|le64atoh_x(x,3,24)|le64atoh_x(x,2,16)|le64atoh_x(x,1,8)|((x)[0])))
142 
143 #define htobe16a(a,x) (a)[0]=(uint8_t)((x)>>8), (a)[1]=(uint8_t)(x)
144 #define htobe32a(a,x) (a)[0]=(uint8_t)((x)>>24), (a)[1]=(uint8_t)((x)>>16), \
145  (a)[2]=(uint8_t)((x)>>8), (a)[3]=(uint8_t)(x)
146 #define htobe64a(a,x) (a)[0]=(uint8_t)((x)>>56), (a)[1]=(uint8_t)((x)>>48), \
147  (a)[2]=(uint8_t)((x)>>40), (a)[3]=(uint8_t)((x)>>32), \
148  (a)[4]=(uint8_t)((x)>>24), (a)[5]=(uint8_t)((x)>>16), \
149  (a)[6]=(uint8_t)((x)>>8), (a)[7]=(uint8_t)(x)
150 #define htole16a(a,x) (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
151 #define htole32a(a,x) (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
152  (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
153 #define htole64a(a,x) (a)[7]=(uint8_t)((x)>>56), (a)[6]=(uint8_t)((x)>>48), \
154  (a)[5]=(uint8_t)((x)>>40), (a)[4]=(uint8_t)((x)>>32), \
155  (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
156  (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
157 
158 #endif /*__BYTEORDER_H*/