UVM_ERROR demoter code

	/*!
	* \brief report_catcher_err_info_demoter_c
	* UVM_ERROT to UVM_INFO Demoter, demote UVM_ERROR based on ID or MESSAGE of UVM_ERROR.
	*/
	class report_catcher_err_info_demoter_c #(int no_of_err_msg = 1,int no_of_err_id = 0) extends uvm_report_catcher;
	`uvm_object_utils(report_catcher_err_info_demoter_c)
	int unsigned no_of_err_msg_demoted[]; /*! \param */
	int unsigned no_of_err_id_demoted[]; /*! \param */
	string exp_err[]; /*! \param */
	string exp_id[]; /*! \param */
	int unsigned string_offset; /*! \param */
	//If we want that error should exactly the same as given, than make this bit 1
	bit exact_match_msg[]; /*! \param */
	/*!
	* \brief Constructor
	* Create a new transaction instance
	* \parameter: name - Instance name of the transaction
	*/
	extern function new(string name = "report_catcher_err_info_demoter_c");
	/*!
	* \brief Function pattern_match_f
	* Function used to match two string given as input arguments.
	* If string matches it will return 1 else return 0.
	* It is used to compare a message or ID of an error with
	* expected error message or ID.
	*/
	extern function bit pattern_match_f(
	input string str1, /*! \param string Output of get_message() or get_id() */
	input string str2, /*! \param string Actual string which is demoted */
	input bit ext_match, /*! \param bit used to represent exact_match_msg on/off */
	input int unsigned err_num, /*! \param int used to represent Err num */
	input bit msg_or_id /*! \param bit used to represent string is message or id, 1->msg, 0->id */
	);
	/*!
	* \brief Function catch
	* If severity is UVM_ERROR then change it to UVM_INFO.
	*/
	extern function action_e catch();
	endclass : report_catcher_err_info_demoter_c

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	function report_catcher_err_info_demoter_c::new(string name = "report_catcher_err_info_demoter_c");
	super.new(name);
	//dynamic array of size no_of_err_msg(no of error messages to be converted in to uvm_info)
	exp_err = new[no_of_err_msg];
	//dynamic array of size no_of_err_id(no of error messages to be converted in to uvm_info with help of error id)
	exp_id = new[no_of_err_id];
	no_of_err_msg_demoted = new[no_of_err_msg];
	no_of_err_id_demoted = new[no_of_err_id];
	exact_match_msg = new[no_of_err_msg];
	string_offset = 0;
	endfunction : new
	function bit report_catcher_err_info_demoter_c::pattern_match_f(
	input string str1,
	input string str2,
	input bit ext_match,
	input int unsigned err_num,
	input bit msg_or_id
	);
	int unsigned length_of_str1;
	int unsigned length_of_str2;
	bit match;
	length_of_str1 = str1.len();
	length_of_str2 = str2.len();
	`uvm_info(get_name(), $sformatf("length of str1=%0d, length of str2=%0d", length_of_str1, length_of_str2), UVM_HIGH)
	// Length comparision
	if (length_of_str2 == 0) // compare with null
	begin
	if (msg_or_id == 1'b1)
	begin
	`uvm_info(get_name(), $sformatf("Length of Expected Err message is ZERO, Doing nothing for err num %0d of err msg"), UVM_LOW)
	end
	else
	begin
	`uvm_info(get_name(), $sformatf("Length of Expected Err message is ZERO, Doing nothing for err num %0d of err id"), UVM_LOW)
	end
	return 0;
	end
	else if(ext_match == 0)
	begin
	//lenght of expected error message can be same or less than actual error message
	if(length_of_str2 > length_of_str1)
	begin
	return 0;
	end
	end
	else
	begin
	//length of expected error message and actual message should same
	if(length_of_str2 != length_of_str1)
	begin
	return 0;
	end
	end
	//for(int i = string_offset; i < length_of_str2 ; i++)
	for(int i = string_offset; i < (string_offset + length_of_str1 - length_of_str2 + 1) ; i++)
	begin
	if(str1.substr(i,i + length_of_str2 - 1) == str2)
	begin
	match = 1'b1;
	return 1;
	end
	end
	if (match == 1'b0)
	begin
	return 0;
	end
	endfunction : pattern_match_f

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	function action_e report_catcher_err_info_demoter_c::catch();
	//if(get_severity() == UVM_ERROR || get_severity() == UVM_INFO)
	if(get_severity() == UVM_ERROR)
	begin
	if(no_of_err_msg > 0)
	begin
	for(int i=0; i < no_of_err_msg; i++)
	begin
	if(pattern_match_f(.str1(get_message()), .str2(exp_err[i]), .ext_match(exact_match_msg[i]), .err_num(i), .msg_or_id(1))
	begin
	set_severity(UVM_INFO);
	set_action(UVM_NO_ACTION);
	set_verbosity(UVM_HIGH);
	no_of_err_msg_demoted[i] ++;
	end
	end
	end
	if(no_of_err_id > 0)
	begin
	for(int i=0; i < no_of_err_id; i++)
	begin
	if(pattern_match_f(.str1(get_id()), .str2(exp_id[i]), .ext_match(0), .err_num(i), .msg_or_id(0))
	begin
	set_severity(UVM_INFO);
	set_action(UVM_NO_ACTION);
	set_verbosity(UVM_HIGH);
	no_of_err_id_demoted[i] ++;
	end
	end
	end
	end
	return THROW;
	endfunction

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