ceph/src/include/byteorder.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2
   3 #pragma once
   4
   5 #include <boost/endian/conversion.hpp>
   6
   7 #include "int_types.h"
   8
   9 template<typename T>
  10 inline T swab(T val) {
  11   return boost::endian::endian_reverse(val);
  12 }
  13
  14 template<typename T>
  15 struct ceph_le {
  16 private:
  17   T v;
  18 public:
  19   ceph_le() = default;
  20   explicit ceph_le(T nv)
  21     : v{boost::endian::native_to_little(nv)}
  22   {}
  23   ceph_le<T>& operator=(T nv) {
  24     v = boost::endian::native_to_little(nv);
  25     return *this;
  26   }
  27   operator T() const { return boost::endian::little_to_native(v); }
  28   friend inline bool operator==(ceph_le a, ceph_le b) {
  29     return a.v == b.v;
  30   }
  31 } __attribute__ ((packed));
  32
  33 using ceph_le64 = ceph_le<__u64>;
  34 using ceph_le32 = ceph_le<__u32>;
  35 using ceph_le16 = ceph_le<__u16>;
  36
  37 using ceph_les64 = ceph_le<__s64>;
  38 using ceph_les32 = ceph_le<__s32>;
  39 using ceph_les16 = ceph_le<__s16>;
  40
  41 inline ceph_les64 init_les64(__s64 x) {
  42   ceph_les64 v;
  43   v = x;
  44   return v;
  45 }
  46 inline ceph_les32 init_les32(__s32 x) {
  47   ceph_les32 v;
  48   v = x;
  49   return v;
  50 }
  51 inline ceph_les16 init_les16(__s16 x) {
  52   ceph_les16 v;
  53   v = x;
  54   return v;
  55 }