double RecursiveCalculator::factor()
{
double value = 0;
if (accept(Number) || (accept(Plus) && accept(Number)))
{
value = getValueFromBuffer();
}
else if (accept(Minus) && accept(Number))
{
value = -getValueFromBuffer();
}
else if (accept(LParenthesis))
{
value = expression();
expect(RParenthesis);
}
else
{
error("Factor: Syntax error.");
symbol = getSymbol();
}
return value;
}
/**
* Verifies answer on the CMGL command
* @param buffer pointer to the buffer
* @param answerSize size of the answer
* @param position position of the SMS in modem storage
* @param size of the SMS
* @return error number
*/
int ATCommandManager::verifyCMGL(char* buffer,int answerSize,int& position,int& size)
{
int commandSize=strlen(ANS_CMGL);
bool bResult=compareBuffer(buffer,commandSize,ANS_CMGL);
if(bResult==false)
{
return Undefined_modem_answer;
}
int firstCommaPosition=0;
bool found=false;
for(int i=commandSize;i<answerSize;i++)
{
if(buffer[i]==',')
{
found =true;
firstCommaPosition=i;
break;
}
}
if(found==false)
{
return Undefined_modem_answer;
}
int valueSize=firstCommaPosition-commandSize;
int value=getValueFromBuffer(&buffer[commandSize],valueSize);
if(value<0)
{
return value;
}
else
{
position=value;
}
found=false;
int lastCommaPossition=0;
for(int i=answerSize-1;i>commandSize;i--)
{
if(buffer[i]==',')
{
lastCommaPossition=i;
break;
}
}
valueSize=answerSize-lastCommaPossition-1;
value=getValueFromBuffer(&buffer[lastCommaPossition+1],valueSize);
if(value<0)
{
return value;
}
else
{
size=value;
}
return 1;
}
