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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 "qpid/amqp_0_10/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/static_assert.hpp>
#include <iterator>
namespace qpid {
namespace amqp_0_10 {
template <class T> void reverse(T& t) {
char*p =reinterpret_cast<char*>(&t);
std::reverse(p, p+sizeof(T));
}
#ifdef BOOST_LITTLE_ENDIAN
template <class T> void bigEndian(T& t) { reverse(t); }
template <class T> void littleEndian(T&) {}
#else
template <class T> void littleEndian(T& t) { reverse(t); }
template <class T> void bigEndian(T&) {}
#endif
/**
* AMQP 0-10 encoding and decoding.
*/
struct Codec {
/** Encode to an output byte iterator */
template <class OutIter>
class Encoder : public EncoderBase<Encoder<OutIter> >
{
public:
typedef EncoderBase<Encoder<OutIter> > Base;
typedef OutIter Iterator;
Encoder(OutIter o, size_t limit=Base::maxLimit()) : out(o) {
this->setLimit(limit);
}
using EncoderBase<Encoder<OutIter> >::operator();
Encoder& operator()(bool x) { raw(x); return *this;}
Encoder& operator()(char x) { raw(x); return *this; }
Encoder& operator()(int8_t x) { raw(x); return *this; }
Encoder& operator()(uint8_t x) { raw(x); return *this; }
Encoder& operator()(int16_t x) { return networkByteOrder(x); }
Encoder& operator()(int32_t x) { return networkByteOrder(x); }
Encoder& operator()(int64_t x) { return networkByteOrder(x); }
Encoder& operator()(uint16_t x) { return networkByteOrder(x); }
Encoder& operator()(uint32_t x) { return networkByteOrder(x); }
Encoder& operator()(uint64_t x) { return networkByteOrder(x); }
Encoder& operator()(float x) { return networkByteOrder(x); }
Encoder& operator()(double x) { return networkByteOrder(x); }
void raw(const void* p, size_t n) {
this->addBytes(n);
out = std::copy((const char*)p, (const char*)p+n, out);
}
void raw(char b) { this->addBytes(1); *out++=b; }
template <class T> Encoder& littleEnd(T x) {
littleEndian(x); raw(&x, sizeof(x)); return *this;
}
OutIter pos() const { return out; }
private:
template <class T> Encoder& networkByteOrder(T x) {
bigEndian(x); raw(&x, sizeof(x)); return *this;
}
OutIter out;
};
template <class InIter>
class Decoder : public DecoderBase<Decoder<InIter> > {
public:
typedef DecoderBase<Decoder<InIter> > Base;
typedef InIter Iterator;
Decoder(InIter i, size_t limit=Base::maxLimit()) : in(i) {
this->setLimit(limit);
}
using DecoderBase<Decoder<InIter> >::operator();
// FIXME aconway 2008-03-10: wrong encoding, need packing support
Decoder& operator()(bool& x) { raw((char&)x); return *this; }
Decoder& operator()(char& x) { raw((char&)x); return *this; }
Decoder& operator()(int8_t& x) { raw((char&)x); return *this; }
Decoder& operator()(uint8_t& x) { raw((char&)x); return *this; }
Decoder& operator()(int16_t& x) { return networkByteOrder(x); }
Decoder& operator()(int32_t& x) { return networkByteOrder(x); }
Decoder& operator()(int64_t& x) { return networkByteOrder(x); }
Decoder& operator()(uint16_t& x) { return networkByteOrder(x); }
Decoder& operator()(uint32_t& x) { return networkByteOrder(x); }
Decoder& operator()(uint64_t& x) { return networkByteOrder(x); }
Decoder& operator()(float& x) { return networkByteOrder(x); }
Decoder& operator()(double& x) { return networkByteOrder(x); }
void raw(void *p, size_t n) {
this->addBytes(n);
std::copy(in, in+n, (char*)p);
std::advance(in, n);
}
void raw(char &b) { this->addBytes(1); b=*in++; }
template <class T> Decoder& littleEnd(T& x) {
raw(&x, sizeof(x)); littleEndian(x); return *this;
}
InIter pos() const { return in; }
private:
template <class T> Decoder& networkByteOrder(T& x) {
raw(&x, sizeof(x)); bigEndian(x); return *this;
}
InIter in;
};
class Size : public EncoderBase<Size> {
public:
Size() : size(0) {}
operator size_t() const { return size; }
using EncoderBase<Size>::operator();
// FIXME aconway 2008-03-10: wrong encoding, need packing support
Size& operator()(bool x) { size += sizeof(x); return *this; }
Size& operator()(char x) { size += sizeof(x); return *this; }
Size& operator()(int8_t x) { size += sizeof(x); return *this; }
Size& operator()(uint8_t x) { size += sizeof(x); return *this; }
Size& operator()(int16_t x) { size += sizeof(x); return *this; }
Size& operator()(int32_t x) { size += sizeof(x); return *this; }
Size& operator()(int64_t x) { size += sizeof(x); return *this; }
Size& operator()(uint16_t x) { size += sizeof(x); return *this; }
Size& operator()(uint32_t x) { size += sizeof(x); return *this; }
Size& operator()(uint64_t x) { size += sizeof(x); return *this; }
Size& operator()(float x) { size += sizeof(x); return *this; }
Size& operator()(double x) { size += sizeof(x); return *this; }
// FIXME aconway 2008-04-03: optimize op()(Iter,Iter)
// for Iter with fixed-size value_type:
// distance(begin,end)*sizeof(value_type)
void raw(const void*, size_t n){ size += n; }
template <class T> Size& littleEnd(T) { size+= sizeof(T); return *this; }
private:
size_t size;
};
// FIXME aconway 2008-03-11: rename to encoder(), decoder()
template <class InIter> static Decoder<InIter> decode(const InIter &i) {
return Decoder<InIter>(i);
}
template <class OutIter> static Encoder<OutIter> encode(OutIter i) {
return Encoder<OutIter>(i);
}
template <class T> static size_t size(const T& x) { return Size()(x); }
template <class Iter> static size_t size(const Iter& a, const Iter& z) { return Size()(a,z); }
};
}} // namespace qpid::amqp_0_10
#endif /*!QPID_AMQP_0_10_CODEC_H*/
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