File Coverage

src/panda/endian.h

Criterion	Covered	Total	%
statement	16	16	100.0
branch	6	12	50.0
condition			n/a
subroutine			n/a
pod			n/a
total	22	28	78.5

line	stmt	bran	code
1			#pragma once
2			#include
3
4			#ifdef _MSC_VER
5			# include
6			#endif
7
8			namespace panda {
9
10			namespace detail {
11			union check_endianess { unsigned x; unsigned char c; };
12	18		static const bool am_i_little = (check_endianess{1}).c;
13
14			#ifdef _MSC_VER
15
16			inline uint16_t swap_bytes16 (uint16_t x) { return _byteswap_ushort(x); }
17			inline uint32_t swap_bytes32 (uint32_t x) { return _byteswap_ulong(x); }
18			inline uint64_t swap_bytes64 (uint64_t x) { return _byteswap_uint64(x); }
19
20			#elif defined(__GNUC__) && (__GNUC__ > 4 \|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) && 0
21
22			inline uint16_t swap_bytes16 (uint16_t x) { return __builtin_swap_bytes16(x); }
23			inline uint32_t swap_bytes32 (uint32_t x) { return __builtin_swap_bytes32(x); }
24			inline uint64_t swap_bytes64 (uint64_t x) { return __builtin_swap_bytes64(x); }
25
26			#else
27
28	2		inline uint16_t swap_bytes16 (uint16_t x) {
29	2		return ((x >> 8) & 0xff) \| (x << 8);
30			}
31
32	6		inline uint32_t swap_bytes32 (uint32_t x) {
33	6		return ((x & 0xff000000) >> 24) \| ((x & 0x00ff0000) >> 8) \| ((x & 0x0000ff00) << 8) \| (x << 24);
34			}
35
36	2		inline uint64_t swap_bytes64 (uint64_t x) {
37			union { uint64_t u64; uint32_t u32[2]; } v1, v2;
38	2		v1.u64 = x;
39	2		v2.u32[0] = swap_bytes32(v1.u32[1]);
40	2		v2.u32[1] = swap_bytes32(v1.u32[0]);
41	2		return v2.u64;
42			}
43
44			#endif
45
46			}
47
48	2	50	inline uint16_t h2be16 (uint16_t x) { return detail::am_i_little ? detail::swap_bytes16(x) : x; }
49			inline uint16_t h2le16 (uint16_t x) { return detail::am_i_little ? x : detail::swap_bytes16(x); }
50	2	50	inline uint16_t be2h16 (uint16_t x) { return detail::am_i_little ? detail::swap_bytes16(x) : x; }
51			inline uint16_t le2h16 (uint16_t x) { return detail::am_i_little ? x : detail::swap_bytes16(x); }
52
53	2	50	inline uint32_t h2be32 (uint32_t x) { return detail::am_i_little ? detail::swap_bytes32(x) : x; }
54			inline uint32_t h2le32 (uint32_t x) { return detail::am_i_little ? x : detail::swap_bytes32(x); }
55	2	50	inline uint32_t be2h32 (uint32_t x) { return detail::am_i_little ? detail::swap_bytes32(x) : x; }
56			inline uint32_t le2h32 (uint32_t x) { return detail::am_i_little ? x : detail::swap_bytes32(x); }
57
58	2	50	inline uint64_t h2be64 (uint64_t x) { return detail::am_i_little ? detail::swap_bytes64(x) : x; }
59			inline uint64_t h2le64 (uint64_t x) { return detail::am_i_little ? x : detail::swap_bytes64(x); }
60	2	50	inline uint64_t be2h64 (uint64_t x) { return detail::am_i_little ? detail::swap_bytes64(x) : x; }
61			inline uint64_t le2h64 (uint64_t x) { return detail::am_i_little ? x : detail::swap_bytes64(x); }
62
63			// just to make templates simpler
64			inline uint8_t h2be (uint8_t x) { return x; }
65			inline uint8_t h2le (uint8_t x) { return x; }
66			inline uint8_t be2h (uint8_t x) { return x; }
67			inline uint8_t le2h (uint8_t x) { return x; }
68
69			inline uint16_t h2be (uint16_t x) { return h2be16(x); }
70			inline uint16_t h2le (uint16_t x) { return h2le16(x); }
71			inline uint16_t be2h (uint16_t x) { return be2h16(x); }
72			inline uint16_t le2h (uint16_t x) { return le2h16(x); }
73
74			inline uint32_t h2be (uint32_t x) { return h2be32(x); }
75			inline uint32_t h2le (uint32_t x) { return h2le32(x); }
76			inline uint32_t be2h (uint32_t x) { return be2h32(x); }
77			inline uint32_t le2h (uint32_t x) { return le2h32(x); }
78
79			inline uint64_t h2be (uint64_t x) { return h2be64(x); }
80			inline uint64_t h2le (uint64_t x) { return h2le64(x); }
81			inline uint64_t be2h (uint64_t x) { return be2h64(x); }
82			inline uint64_t le2h (uint64_t x) { return le2h64(x); }
83
84			}