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Diffstat (limited to 'cpp/src/qpid/amqp/Encoder.h')
| -rw-r--r-- | cpp/src/qpid/amqp/Encoder.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/cpp/src/qpid/amqp/Encoder.h b/cpp/src/qpid/amqp/Encoder.h new file mode 100644 index 0000000000..e2938a002a --- /dev/null +++ b/cpp/src/qpid/amqp/Encoder.h @@ -0,0 +1,149 @@ +#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 <stddef.h> +#include <string> + +namespace qpid { +namespace types { +class Uuid; +} +namespace amqp { +struct CharSequence; +struct Descriptor; + +/** + * Class to help create AMQP encoded data. + */ +class Encoder +{ + public: + 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 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); + 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*); + + void writeDescriptor(const Descriptor&); + Encoder(char* data, size_t size); + size_t getPosition(); + void resetPosition(size_t p); + char* skip(size_t); + void writeBytes(const char* bytes, size_t count); + virtual ~Encoder() {} + private: + char* data; + size_t size; + size_t position; + + 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*/ |