nerdcruft/libcruft-util
1
0
Fork 0
Code Issues Releases Activity

Select endian conversion method based on compiler

Browse Source
This commit is contained in:
Danny Robson 2012-05-26 17:59:50 +10:00
parent a9453c02ea
commit 71c4df0cac
1 changed files with 18 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
endian.hpp
View File

@ -43,12 +43,14 @@ constexpr uint16_t ntoh (uint16_t n)
constexpr uint32_t hton (uint32_t h) {
#if defined(__GNUG__)
return __builtin_bswap32 (h);
//return (h & 0xFF000000U) >> 24 |
// (h & 0x00FF0000U) >> 8 |
// (h & 0x0000FF00U) << 8 |
// (h & 0x000000FFU) << 24;
#else
return (h & 0xFF000000U) >> 24 |
(h & 0x00FF0000U) >> 8 |
(h & 0x0000FF00U) << 8 |
(h & 0x000000FFU) << 24;
#endif
}
@ -57,16 +59,18 @@ constexpr uint32_t ntoh (uint32_t n)
constexpr uint64_t hton (uint64_t h) {
#if defined(__GNUG__)
return __builtin_bswap64 (h);
// return (h & 0xFF00000000000000UL) >> 56 |
// (h & 0x00FF000000000000UL) >> 40 |
// (h & 0x0000FF0000000000UL) >> 24 |
// (h & 0x000000FF00000000UL) >> 8 |
// (h & 0x00000000FF000000UL) << 8 |
// (h & 0x0000000000FF0000UL) << 24 |
// (h & 0x000000000000FF00UL) << 40 |
// (h & 0x00000000000000FFUL) << 56;
#else
return (h & 0xFF00000000000000UL) >> 56 |
(h & 0x00FF000000000000UL) >> 40 |
(h & 0x0000FF0000000000UL) >> 24 |
(h & 0x000000FF00000000UL) >> 8 |
(h & 0x00000000FF000000UL) << 8 |
(h & 0x0000000000FF0000UL) << 24 |
(h & 0x000000000000FF00UL) << 40 |
(h & 0x00000000000000FFUL) << 56;
#endif
}