92 lines
1.8 KiB
C++
92 lines
1.8 KiB
C++
#ifndef ENDIAN_H
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#define ENDIAN_H
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#include <stdint.h>
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#include <boost/static_assert.hpp>
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//----------------------------------------------------------------
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// FIXME: rename to endian
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namespace base {
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// These are just little wrapper types to make the compiler
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// understand that the le types are not assignable to the
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// corresponding cpu type.
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struct __le16 {
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explicit __le16(uint16_t v = 0)
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: v_(v) {
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}
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uint16_t v_;
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} __attribute__((packed));
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struct __le32 {
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explicit __le32(uint32_t v = 0)
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: v_(v) {
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}
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uint32_t v_;
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} __attribute__((packed));
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struct __le64 {
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explicit __le64(uint64_t v = 0)
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: v_(v) {
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}
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uint64_t v_;
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} __attribute__((packed));
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//--------------------------------
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// FIXME: actually do the conversions !
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template <typename CPUType, typename DiskType>
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CPUType to_cpu(DiskType const &d) {
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BOOST_STATIC_ASSERT(sizeof(d) == 0);
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}
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template <typename DiskType, typename CPUType>
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DiskType to_disk(CPUType const &v) {
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BOOST_STATIC_ASSERT(sizeof(v) == 0);
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}
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template <>
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inline uint16_t to_cpu<uint16_t, __le16>(__le16 const &d) {
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return d.v_;
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}
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template <>
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inline __le16 to_disk<__le16, uint16_t>(uint16_t const &v) {
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return __le16(v);
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}
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template <>
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inline uint32_t to_cpu<uint32_t, __le32>(__le32 const &d) {
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return d.v_;
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}
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template <>
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inline __le32 to_disk<__le32, uint32_t>(uint32_t const &v) {
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return __le32(v);
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}
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template <>
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inline uint64_t to_cpu<uint64_t, __le64>(__le64 const &d) {
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return d.v_;
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}
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template <>
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inline __le64 to_disk<__le64, uint64_t>(uint64_t const &v) {
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return __le64(v);
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}
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//--------------------------------
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bool test_bit_le(void const *bits, unsigned b);
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void set_bit_le(void *bits, unsigned b);
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void clear_bit_le(void *bits, unsigned b);
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}
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//----------------------------------------------------------------
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#endif
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