Thinger.io Client Library for ARM mbed platform. This is a generic library that provides a base class that can be used to other develop hardware specific libraries.
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Diff: thinger/thinger_decoder.hpp
- Revision:
- 0:b75d784c7c1a
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- 4:de51256455f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/thinger/thinger_decoder.hpp Thu Dec 24 13:18:08 2015 +0000 @@ -0,0 +1,137 @@ +// The MIT License (MIT) +// +// Copyright (c) 2015 THINGER LTD +// Author: alvarolb@gmail.com (Alvaro Luis Bustamante) +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +#ifndef THINGER_DECODER_HPP +#define THINGER_DECODER_HPP + +#include "pson.h" +#include "thinger_io.hpp" +#include "thinger_message.hpp" + +namespace thinger{ + + class thinger_decoder : public protoson::pson_decoder{ + public: + void decode(thinger_message& message, size_t size){ + size_t start_read = bytes_read(); + while(size-(bytes_read()-start_read)>0) { + protoson::pb_wire_type wire_type; + uint32_t field_number; + pb_decode_tag(wire_type, field_number); + switch (wire_type) { + case protoson::length_delimited:{ + uint32_t size = pb_decode_varint32(); + void *data = NULL; + switch (field_number) { + /* + case thinger_message::THING_ID: + data = protoson::pool.allocate(size + 1); + pb_read_string((char *) data, size); + message.set_thing_id((const char *) data); + break; + */ + default: + pb_skip(size); + break; + } + } + break; + case protoson::varint: { + switch (field_number) { + case thinger_message::SIGNAL_FLAG: + message.set_signal_flag((thinger_message::signal_flag)pb_decode_varint32()); + break; + case thinger_message::STREAM_ID: + message.set_stream_id(pb_decode_varint32()); + break; + default: + pb_skip_varint(); + break; + } + break; + } + case protoson::pson_type: + switch(field_number){ + case thinger_message::RESOURCE: + protoson::pson_decoder::decode(message.get_resources()); + break; + case thinger_message::PSON_PAYLOAD: + protoson::pson_decoder::decode(((protoson::pson&) message)); + break; + default: + break; + } + break; + case protoson::fixed_32: + pb_skip(4); + break; + case protoson::fixed_64: + pb_skip(8); + break; + default: + break; + } + } + } + }; + + class thinger_read_decoder : public thinger_decoder{ + public: + thinger_read_decoder(thinger_io& io) : io_(io) + {} + + protected: + virtual bool read(void* buffer, size_t size){ + io_.read((char*)buffer, size); + protoson::pson_decoder::read(buffer, size); + return true; + } + + private: + thinger_io& io_; + }; + + class thinger_memory_decoder : public thinger_decoder{ + + public: + thinger_memory_decoder(uint8_t* buffer, size_t size) : buffer_(buffer), size_(size){} + + protected: + virtual bool read(void* buffer, size_t size){ + if(read_+size<=size_){ + memcpy(buffer, buffer_ + read_, size); + return protoson::pson_decoder::read(buffer, size); + }else{ + return false; + } + } + + private: + uint8_t* buffer_; + size_t size_; + + }; + +} + +#endif