111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
// Copyright (C) 2011 Red Hat, Inc. All rights reserved.
|
|
//
|
|
// This file is part of the thin-provisioning-tools source.
|
|
//
|
|
// thin-provisioning-tools is free software: you can redistribute it
|
|
// and/or modify it under the terms of the GNU General Public License
|
|
// as published by the Free Software Foundation, either version 3 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// thin-provisioning-tools is distributed in the hope that it will be
|
|
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
|
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along
|
|
// with thin-provisioning-tools. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
#ifndef ENDIAN_H
|
|
#define ENDIAN_H
|
|
|
|
#include <endian.h>
|
|
#include <stdint.h>
|
|
#include <boost/static_assert.hpp>
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
// FIXME: rename to endian
|
|
namespace base {
|
|
|
|
// These are just little wrapper types to make the compiler
|
|
// understand that the le types are not assignable to the
|
|
// corresponding cpu type.
|
|
struct le16 {
|
|
explicit le16(uint16_t v = 0)
|
|
: v_(v) {
|
|
}
|
|
|
|
uint16_t v_;
|
|
} __attribute__((packed));
|
|
|
|
struct le32 {
|
|
explicit le32(uint32_t v = 0)
|
|
: v_(v) {
|
|
}
|
|
|
|
uint32_t v_;
|
|
} __attribute__((packed));
|
|
|
|
struct le64 {
|
|
explicit le64(uint64_t v = 0)
|
|
: v_(v) {
|
|
}
|
|
|
|
uint64_t v_;
|
|
} __attribute__((packed));
|
|
|
|
//--------------------------------
|
|
|
|
// FIXME: actually do the conversions !
|
|
template <typename CPUType, typename DiskType>
|
|
CPUType to_cpu(DiskType const &d) {
|
|
BOOST_STATIC_ASSERT(sizeof(d) == 0);
|
|
}
|
|
|
|
template <typename DiskType, typename CPUType>
|
|
DiskType to_disk(CPUType const &v) {
|
|
BOOST_STATIC_ASSERT(sizeof(v) == 0);
|
|
}
|
|
|
|
template <>
|
|
inline uint16_t to_cpu<uint16_t, le16>(le16 const &d) {
|
|
return le16toh(d.v_);
|
|
}
|
|
|
|
template <>
|
|
inline le16 to_disk<le16, uint16_t>(uint16_t const &v) {
|
|
return le16(htole16(v));
|
|
}
|
|
|
|
template <>
|
|
inline uint32_t to_cpu<uint32_t, le32>(le32 const &d) {
|
|
return le32toh(d.v_);
|
|
}
|
|
|
|
template <>
|
|
inline le32 to_disk<le32, uint32_t>(uint32_t const &v) {
|
|
return le32(htole32(v));
|
|
}
|
|
|
|
template <>
|
|
inline uint64_t to_cpu<uint64_t, le64>(le64 const &d) {
|
|
return le64toh(d.v_);
|
|
}
|
|
|
|
template <>
|
|
inline le64 to_disk<le64, uint64_t>(uint64_t const &v) {
|
|
return le64(htole64(v));
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
bool test_bit_le(void const *bits, unsigned b);
|
|
void set_bit_le(void *bits, unsigned b);
|
|
void clear_bit_le(void *bits, unsigned b);
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|