libmtp: gphoto2-endian.h Source File

libmtp 1.1.21

gphoto2-endian.h
1/* This file is generated automatically by configure */
2/* It is valid only for the system type i686-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*/