77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_ENDIAN_HPP
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#define __UTIL_ENDIAN_HPP
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#include <cstdint>
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enum {
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ENDIAN_BIG,
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ENDIAN_LITTLE
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};
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constexpr uint8_t hton (uint8_t h) { return h; }
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constexpr uint8_t ntoh (uint8_t n) { return n; }
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constexpr uint16_t hton (uint16_t h) {
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return ((h & 0xFF00) >> 8) |
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((h & 0x00FF) << 8);
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}
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constexpr uint16_t ntoh (uint16_t n)
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{ return hton (n); }
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constexpr uint32_t hton (uint32_t h) {
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return __builtin_bswap32 (h);
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//return (h & 0xFF000000U) >> 24 |
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// (h & 0x00FF0000U) >> 8 |
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// (h & 0x0000FF00U) << 8 |
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// (h & 0x000000FFU) << 24;
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}
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constexpr uint32_t ntoh (uint32_t n)
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{ return hton (n); }
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constexpr uint64_t hton (uint64_t h) {
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return __builtin_bswap64 (h);
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// return (h & 0xFF00000000000000UL) >> 56 |
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// (h & 0x00FF000000000000UL) >> 40 |
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// (h & 0x0000FF0000000000UL) >> 24 |
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// (h & 0x000000FF00000000UL) >> 8 |
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// (h & 0x00000000FF000000UL) << 8 |
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// (h & 0x0000000000FF0000UL) << 24 |
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// (h & 0x000000000000FF00UL) << 40 |
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// (h & 0x00000000000000FFUL) << 56;
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}
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constexpr uint64_t ntoh (uint64_t n)
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{ return hton (n); }
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#endif
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