BayEOSBufferRAM.cpp

#include "BayEOSBufferRAM.h"

BayEOSBufferRAM::BayEOSBufferRAM(void){}

BayEOSBufferRAM::BayEOSBufferRAM(uint16_t max_length,uint16_t min_free):BayEOSBuffer(){
    while((_buffer=(uint8_t *)malloc(max_length))==NULL){
        max_length-=10;
    }
    free(_buffer);
    max_length-=min_free;
    _buffer=(uint8_t *)malloc(max_length);
    _ram_pos=_buffer;
    _max_length=max_length;
    reset();
}

BayEOSBufferRAM::BayEOSBufferRAM(uint8_t* buffer,unsigned long max_length):BayEOSBuffer(){
    _buffer=buffer;
    _ram_pos=_buffer;
    _max_length=max_length;
    reset();
}


uint8_t BayEOSBufferRAM::write(const uint8_t b){
    if((_ram_pos-_buffer)<_max_length){
        *_ram_pos=b;
        _ram_pos++;
        return 1;
    } else return 0;
}

uint8_t BayEOSBufferRAM::write(const uint8_t *b,uint8_t length){
    if((_ram_pos-_buffer)+length<=_max_length){
        memcpy(_ram_pos,b,length);
        _ram_pos+=length;
        return length;
    } return 0;
}

uint8_t BayEOSBufferRAM::seek(unsigned long pos){
    if(pos<_max_length){
        _ram_pos=_buffer+pos;
        return true;
    } else return false;
}

int BayEOSBufferRAM::read(void){
    return *_ram_pos++;
}

int BayEOSBufferRAM::read(uint8_t *dest,int length){
    memcpy(dest,_ram_pos,length);
    _ram_pos+=length;
    return length;
}

void BayEOSBufferRAM::flush(void){
}

void BayEOSBufferRAM::resetStorage(void){
}