Thread: pattern checking in a string question..

This function needs to check if the sting is a polynomial .
It check it for some sort pattern. If this string is not builded by this pattern then it return
0. else it returns 1

i translated this function from java

can you tell me what pattern it checks in this string??
(variable length is the length of the string)

Code:

 
int checkPoly(char[] str,int length)
	{
	  int result;
	  result=false;
          int index;
           int index2;
             int index3;


 

	  for( index=0;((index<length)&& (((str[length-1]>'0')&&(str[length-1]<'9')))));index++)
	   {
		  if((str[index]=='(')&&(str[index+1]!='('))
		  {
			
			  for (index2=0;index2<length;index2++)
			  {
				  if(str[index2]==')')
				  {                                        
					  if((str[index2+1]=='x')&&(str[index2+2]=='^')&&((str[index2+3]>'0')&&(str[index2+3]<'9'))))

					  {
						  result=1;
						  index=length;
						  for (index3=index2+2;((index3<length)&&(((length)-(index3+2)!=0)));index3++)
						  {							 
							  if(str[index3]=='(')
							  {
								  if(str[index3-1]=='+')
								  {									  
									  index3=length;
									  result=1;
								  }
								  else
								  {
									  index3=length;
									  index2=length;				
									  result=0;
								  }
								  
							  }else{}
						  }
					  }else
					  {
						  result=0;
						  index2=length;
						  index=length;
						  
					  }
				  }else{}
			  }
		  }else {
			  result=0;
			  index=length;
			  }
		 
       }
	  return result;
	}