Commit | Line | Data |
---|---|---|
59635212 SE |
1 | #ifndef unaligned_h |
2 | #define unaligned_h | |
3 | ||
6fbd4b99 | 4 | #include <stdint.h> |
993db2a6 | 5 | #include "util.h" |
6fbd4b99 | 6 | |
59635212 SE |
7 | /* Parts of the secnet key-exchange protocol require access to |
8 | unaligned big-endian quantities in buffers. These macros provide | |
9 | convenient access, even on architectures that don't support unaligned | |
10 | accesses. */ | |
11 | ||
12 | #define put_uint32(a,v) do { (a)[0]=(v)>>24; (a)[1]=((v)&0xff0000)>>16; \ | |
13 | (a)[2]=((v)&0xff00)>>8; (a)[3]=(v)&0xff; } while(0) | |
14 | ||
15 | #define put_uint16(a,v) do {(a)[0]=((v)&0xff00)>>8; (a)[1]=(v)&0xff;} while(0) | |
16 | ||
993db2a6 IJ |
17 | #define put_uint8(a,v) do {(a)[0]=((v)&0xff);} while(0) |
18 | ||
6fbd4b99 IJ |
19 | #define get_uint32(a) \ |
20 | (((uint32_t)(a)[0]<<24) | ((uint32_t)(a)[1]<<16) | \ | |
21 | ((uint32_t)(a)[2]<<8) | (uint32_t)(a)[3]) | |
59635212 | 22 | |
6fbd4b99 | 23 | #define get_uint16(a) (((uint16_t)(a)[0]<<8)|(uint16_t)(a)[1]) |
59635212 | 24 | |
993db2a6 IJ |
25 | #define get_uint8(a) (((uint8_t)(a)[0])) |
26 | ||
27 | #define UNALIGNED_DEF_FORTYPE(type,appre) \ | |
28 | static inline void buf_##appre##_##type(struct buffer_if *buf, type##_t v) \ | |
29 | { \ | |
30 | uint8_t *c=buf_##appre(buf,sizeof(type##_t)); \ | |
31 | put_##type(c,v); \ | |
32 | } \ | |
33 | static inline type##_t buf_un##appre##_##type(struct buffer_if *buf) \ | |
34 | { \ | |
35 | const uint8_t *c=buf_un##appre(buf,sizeof(type##_t)); \ | |
36 | return get_##type(c); \ | |
37 | } | |
38 | ||
39 | UNALIGNED_DEF_FORTYPE(uint32,append) | |
40 | UNALIGNED_DEF_FORTYPE(uint16,append) | |
41 | UNALIGNED_DEF_FORTYPE(uint8,append) | |
42 | UNALIGNED_DEF_FORTYPE(uint32,prepend) | |
43 | UNALIGNED_DEF_FORTYPE(uint16,prepend) | |
44 | UNALIGNED_DEF_FORTYPE(uint8,prepend) | |
59635212 SE |
45 | |
46 | #endif /* unaligned_h */ |