optimize two-way strstr and memmem bad character shift
[musl.git] / include / endian.h
blob1bd444518ab5febecb6cec6e2e7693c29359d082
1 #ifndef _ENDIAN_H
2 #define _ENDIAN_H
4 #include <features.h>
6 #define __LITTLE_ENDIAN 1234
7 #define __BIG_ENDIAN 4321
8 #define __PDP_ENDIAN 3412
10 #if defined(__GNUC__) && defined(__BYTE_ORDER__)
11 #define __BYTE_ORDER __BYTE_ORDER__
12 #else
13 #include <bits/endian.h>
14 #endif
16 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
18 #define BIG_ENDIAN __BIG_ENDIAN
19 #define LITTLE_ENDIAN __LITTLE_ENDIAN
20 #define PDP_ENDIAN __PDP_ENDIAN
21 #define BYTE_ORDER __BYTE_ORDER
23 #include <stdint.h>
25 static __inline uint16_t __bswap16(uint16_t __x)
27 return __x<<8 | __x>>8;
30 static __inline uint32_t __bswap32(uint32_t __x)
32 return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
35 static __inline uint64_t __bswap64(uint64_t __x)
37 return __bswap32(__x)+0ULL<<32 | __bswap32(__x>>32);
40 #if __BYTE_ORDER == __LITTLE_ENDIAN
41 #define htobe16(x) __bswap16(x)
42 #define be16toh(x) __bswap16(x)
43 #define betoh16(x) __bswap16(x)
44 #define htobe32(x) __bswap32(x)
45 #define be32toh(x) __bswap32(x)
46 #define betoh32(x) __bswap32(x)
47 #define htobe64(x) __bswap64(x)
48 #define be64toh(x) __bswap64(x)
49 #define betoh64(x) __bswap64(x)
50 #define htole16(x) (uint16_t)(x)
51 #define le16toh(x) (uint16_t)(x)
52 #define letoh16(x) (uint16_t)(x)
53 #define htole32(x) (uint32_t)(x)
54 #define le32toh(x) (uint32_t)(x)
55 #define letoh32(x) (uint32_t)(x)
56 #define htole64(x) (uint64_t)(x)
57 #define le64toh(x) (uint64_t)(x)
58 #define letoh64(x) (uint64_t)(x)
59 #else
60 #define htobe16(x) (uint16_t)(x)
61 #define be16toh(x) (uint16_t)(x)
62 #define betoh16(x) (uint16_t)(x)
63 #define htobe32(x) (uint32_t)(x)
64 #define be32toh(x) (uint32_t)(x)
65 #define betoh32(x) (uint32_t)(x)
66 #define htobe64(x) (uint64_t)(x)
67 #define be64toh(x) (uint64_t)(x)
68 #define betoh64(x) (uint64_t)(x)
69 #define htole16(x) __bswap16(x)
70 #define le16toh(x) __bswap16(x)
71 #define letoh16(x) __bswap16(x)
72 #define htole32(x) __bswap32(x)
73 #define le32toh(x) __bswap32(x)
74 #define letoh32(x) __bswap32(x)
75 #define htole64(x) __bswap64(x)
76 #define le64toh(x) __bswap64(x)
77 #define letoh64(x) __bswap64(x)
78 #endif
80 #endif
82 #endif