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#ifndef QPID_AMQP_ENCODER_H
#define QPID_AMQP_ENCODER_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/sys/IntegerTypes.h"
#include "qpid/amqp/Constructor.h"
#include "qpid/Exception.h"
#include <list>
#include <map>
#include <stddef.h>
#include <string>
namespace qpid {
namespace types {
class Uuid;
class Variant;
}
namespace amqp {
struct CharSequence;
struct Descriptor;
/**
* Class to help create AMQP encoded data.
*/
class Encoder
{
public:
struct Overflow : public Exception { Overflow(); };
/** Create an encoder that writes into the buffer at data up to size bytes.
* Write operations throw Overflow if encoding exceeds size bytes.
*/
QPID_COMMON_EXTERN Encoder(char* data, size_t size);
/** Create an encoder that manages its own buffer. Buffer grows to accomodate
* all encoded data. Call getBuffer() to get the buffer.
*/
QPID_COMMON_EXTERN Encoder();
void writeCode(uint8_t);
void write(bool);
void write(uint8_t);
void write(uint16_t);
void write(uint32_t);
void write(uint64_t);
void write(int8_t);
void write(int16_t);
void write(int32_t);
void write(int64_t);
void write(float);
void write(double);
void write(const qpid::types::Uuid&);
void writeNull(const Descriptor* d=0);
void writeBoolean(bool, const Descriptor* d=0);
void writeUByte(uint8_t, const Descriptor* d=0);
void writeUShort(uint16_t, const Descriptor* d=0);
void writeUInt(uint32_t, const Descriptor* d=0);
void writeULong(uint64_t, const Descriptor* d=0);
void writeByte(int8_t, const Descriptor* d=0);
void writeShort(int16_t, const Descriptor* d=0);
void writeInt(int32_t, const Descriptor* d=0);
void writeLong(int64_t, const Descriptor* d=0);
void writeFloat(float, const Descriptor* d=0);
void writeDouble(double, const Descriptor* d=0);
void writeUuid(const qpid::types::Uuid&, const Descriptor* d=0);
void writeTimestamp(int64_t, const Descriptor* d=0);
void writeSymbol(const CharSequence&, const Descriptor* d=0);
void writeSymbol(const std::string&, const Descriptor* d=0);
void writeString(const CharSequence&, const Descriptor* d=0);
void writeString(const std::string&, const Descriptor* d=0);
void writeBinary(const CharSequence&, const Descriptor* d=0);
QPID_COMMON_EXTERN void writeBinary(const std::string&, const Descriptor* d=0);
void* startList8(const Descriptor* d=0);
void* startList32(const Descriptor* d=0);
void endList8(uint8_t count, void*);
void endList32(uint32_t count, void*);
void* startMap8(const Descriptor* d=0);
void* startMap32(const Descriptor* d=0);
void endMap8(uint8_t count, void*);
void endMap32(uint32_t count, void*);
void* startArray8(const Constructor&, const Descriptor* d=0);
void* startArray32(const Constructor&, const Descriptor* d=0);
void endArray8(size_t count, void*);
void endArray32(size_t count, void*);
QPID_COMMON_EXTERN void writeValue(const qpid::types::Variant&, const Descriptor* d=0);
QPID_COMMON_EXTERN void writeMap(const std::map<std::string, qpid::types::Variant>& value, const Descriptor* d=0, bool large=true);
QPID_COMMON_EXTERN void writeList(const std::list<qpid::types::Variant>& value, const Descriptor* d=0, bool large=true);
void writeDescriptor(const Descriptor&);
QPID_COMMON_EXTERN size_t getPosition();
void resetPosition(size_t p);
char* skip(size_t);
void writeBytes(const char* bytes, size_t count);
virtual ~Encoder() {}
/** Return the total size of the buffer. */
size_t getSize() const;
/** Return the growable buffer. */
std::string getBuffer();
/** Return the unused portion of the buffer. */
char* getData();
private:
char* data;
size_t size;
size_t position;
bool grow;
std::string buffer;
void write(const CharSequence& v, std::pair<uint8_t, uint8_t> codes, const Descriptor* d);
void write(const std::string& v, std::pair<uint8_t, uint8_t> codes, const Descriptor* d);
void check(size_t);
template<typename T> void write(T value, uint8_t code, const Descriptor* d)
{
if (d) writeDescriptor(*d);
writeCode(code);
write(value);
}
template<typename T> void write(T value, std::pair<uint8_t, uint8_t> codes, const Descriptor* d)
{
if (value < 256) {
write((uint8_t) value, codes.first, d);
} else {
write(value, codes.second, d);
}
}
template<typename T> void* start(uint8_t code, const Descriptor* d)
{
if (d) writeDescriptor(*d);
writeCode(code);
//skip size and count, will backfill on end
return skip(sizeof(T)/*size*/ + sizeof(T)/*count*/);
}
template<typename T> void* startArray(uint8_t code, const Descriptor* d, const Constructor& c)
{
void* token = start<T>(code, d);
if (c.isDescribed) {
writeDescriptor(c.descriptor);
}
check(1);
writeCode(c.code);
return token;
}
};
}} // namespace qpid::amqp
#endif /*!QPID_AMQP_ENCODER_H*/
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