PicoPB.h

/*
  PicoPB.h v1.0 - An exceptionally lightweight Protocol-Buffers support lib which consumes no RAM and less than 1% flash
  (C) Copyright 2018 (GNU GENERAL PUBLIC LICENSE, Version 3) - Chris Drake <cdrake@cpan.org>
*/

#ifndef PicoPB_h
#define PicoPB_h


#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif


class PicoPB
{
  public:
    PicoPB(unsigned int);
    unsigned int encode_varint(char *buffer, unsigned int input);	// Returns the number of bytes used to store it
    unsigned int encode_varint(char *buffer, uint32_t input);		//  "
    unsigned int encode_varint(char *buffer, unsigned char input);	//  "
    unsigned int encode_varint(char *buffer, int input);		//  " (uses zigzag encoding)
    unsigned int encode_varint(char *buffer, int32_t input);		//  " (uses zigzag encoding)
    uint32_t decode_varint(char *buffer);				// Returns the unsigned int
    unsigned int decode_varint(uint8_t *buffer, uint16_t *val);		// Puts answer into val, returns the number of bytes that were used to store it in the stream
    unsigned int decode_varint(uint8_t *buffer, uint32_t *val);		// Puts answer into val, returns the number of bytes that were used to store it in the stream
    int32_t decode_svarint(char *);					// Returns the signed int
    unsigned int decode_svarint(char *buffer,uint32_t *va);
    //int16_t decode_svarint(char *buffer);

    // All return the number of buffer-bytes used:-
    unsigned int encode_string(char *buffer,char *input, unsigned int length);
    unsigned int encode_string(char *buffer,char *input); // calls encode_string with strlen(input)
    unsigned int decode_string(char *buffer,char *output, unsigned int maxlen);
    unsigned int decode_string(byte *buffer,byte *output, unsigned int maxlen);
    unsigned int encode_fixed32(char *buffer,float input);
    //unsigned int encode_fixed32(char *buffer,double input);
    float decode_fixed32(char *buffer);
    unsigned int decode_fixed32(char *buffer, float *value);
    //double decode_fixed32(char *buffer);

    unsigned int encode_fixed64(char *buffer,long double input);
    long double decode_fixed64(char *buffer);


  private:
    //int _memloc;
};

#endif