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#ifndef QPID_AMQP_0_10_CODEC_H
#define QPID_AMQP_0_10_CODEC_H
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "built_in_types.h"
#include "qpid/Serializer.h"
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_float.hpp>
#include <boost/type_traits/is_arithmetic.hpp>
#include <boost/detail/endian.hpp>
#include <boost/ref.hpp>
namespace qpid {
namespace amqp_0_10 {
/**
* AMQP 0-10 encoding and decoding.
*/
struct Codec
{
template <class T>
static inline void endianize(T& value) {
#ifdef BOOST_LITTLE_ENDIAN
std::reverse((char*)&value, (char*)&value+sizeof(value));
#else
(void)value; // Avoid unused var warnings.
#endif
}
static inline void endianize(char&) {}
static inline void endianize(uint8_t&) {}
static inline void endianize(int8_t&) {}
template <class Out> struct Encode : public ConstSerializer<Encode<Out> > {
Out out;
Encode(Out o) : out(o) {}
using ConstSerializer<Encode<Out> >::operator();
using ConstSerializer<Encode<Out> >::raw;
template <class T>
typename boost::enable_if<boost::is_integral<T>, Encode&>::type
operator()(const T& x) { T xx(x); endianize(xx); return raw(xx); }
// FIXME aconway 2008-02-20: correct float encoading
template <class T>
typename boost::enable_if<boost::is_float<T>, Encode&>::type
operator()(const T& x) { return raw(x); }
template<class T, class SizeType>
Encode& operator()(const CodableString<T,SizeType>& str) {
(*this)(SizeType(str.size()));
std::for_each(str.begin(), str.end(), *this);
return *this;
}
private:
friend class ConstSerializer<Encode<Out> >;
Encode& raw(const void* vp, size_t s) {
char* p = (char*) vp;
std::copy(p, p+s, out);
return *this;
}
Encode& byte(char x) { out++ = x; return *this; }
};
template <class In> struct Decode : public Serializer<Decode<In> > {
In in;
Decode(In i) : in(i) {}
using Serializer<Decode<In> >::operator();
using Serializer<Decode<In> >::raw;
template <class T>
typename boost::enable_if<boost::is_integral<T>, Decode&>::type
operator()(T& x) {
raw(&x, sizeof(x));
endianize(x);
return *this;
}
template <class T>
typename boost::enable_if<boost::is_float<T>, Decode&>::type
operator()(T& x) { return raw(&x, sizeof(x)); }
template<class T, class SizeType>
Decode& operator()(CodableString<T,SizeType>& str) {
SizeType n;
(*this)(n);
str.resize(n);
std::for_each(str.begin(), str.end(), *this);
return *this;
}
private:
friend class Serializer<Decode<In> >;
Decode& raw(void* vp, size_t s) {
char* p=(char*)vp;
std::copy(in, in+s, p);
return *this;
}
Decode& byte(char& x) { x = *in++; return *this; }
};
struct Size : public ConstSerializer<Size> {
Size() : size(0) {}
size_t size;
operator size_t() const { return size; }
using ConstSerializer<Size>::operator();
using ConstSerializer<Size>::raw;
template <class T>
typename boost::enable_if<boost::is_arithmetic<T>, Size&>::type
operator()(const T&) { size += sizeof(T); return *this; }
template <class T, size_t N>
Size& operator()(const boost::array<T,N>&) {
size += sizeof(boost::array<T,N>);
return *this;
}
template<class T, class SizeType>
Size& operator()(const CodableString<T,SizeType>& str) {
size += sizeof(SizeType) + str.size()*sizeof(T);
return *this;
}
private:
friend class ConstSerializer<Size>;
Size& raw(void*, size_t s) { size += s; return *this; }
Size& byte(char) { ++size; return *this; }
};
template <class Out, class T>
static void encode(Out o, const T& x) {
Encode<Out>encode(o);
encode(x);
}
template <class In, class T>
static void decode(In i, T& x) {
Decode<In> decode(i);
decode(x);
}
template <class T>
static size_t size(const T& x) {
Size sz;
sz(x);
return sz;
}
};
}} // namespace qpid::amqp_0_10
#endif /*!QPID_AMQP_0_10_CODEC_H*/
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