libmtp: gphoto2-endian.h Source File

libmtp 1.1.20

gphoto2-endian.h
1/* This file is generated automatically by configure */
2/* It is valid only for the system type x86_64-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/* 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*/