You need a developer who knows both databases to to the porting or even a complete re-write.

CREATE OR REPLACE FUNCTION save_to_number(INCHAR IN VARCHAR) RETURN NUMBER AS
  v_temp_number NUMBER;
BEGIN
  v_temp_number := To_Number(INCHAR);
  RETURN v_temp_number;
EXCEPTION
  WHEN OTHERS THEN
    RETURN -1;
END;
/

--ADVENTNET DROP SCRIPTS 
If Exists ( SELECT name 
            FROM sysobjects  
            WHERE name = 'save_to_number'
            AND type = 'FN')
	DROP FUNCTION save_to_number
GO 
CREATE FUNCTION save_to_number
(
	@INCHAR                                   VARCHAR(4000) 
)
RETURNS FLOAT 
AS 
	BEGIN
		

		DECLARE @adv_rowcount INT

		DECLARE @adv_error INT

		DECLARE @v_temp_number                            NUMERIC(38) 
		SELECT @v_temp_number  = CONVERT(NUMERIC(8, 2), @INCHAR)
		
		RETURN @v_temp_number
		GOTO ExitLabel1
		Exception1:
			  
			BEGIN
			
			RETURN -1 
			/* AdventNet SwisSQL (Oracle To SQL Server) : Manual Intervention to verify Exception is required */
			END
		ExitLabel1:

		RETURN @v_temp_number

	END


GO
 ########################################################################################################
 --ADVENTNET DROP SCRIPTS
IF Exists ( SELECT name FROM sysobjects 
            WHERE name = 'POPULATE_SQLERRM'            AND type = 'P')
            DROP PROCEDURE POPULATE_SQLERRM
            GO

 CREATE PROCEDURE POPULATE_SQLERRM
 AS 
  BEGIN 
 --ADVENTNET DROP SCRIPTS
IF Exists ( SELECT name FROM sysobjects 
            WHERE name = 'ADV_SQLERRS'            AND type = 'U')
  BEGIN    DROP TABLE ADV_SQLERRS  END
      CREATE TABLE ADV_SQLERRS (NAME VARCHAR(100),ERROR_CODE INTEGER, ERROR_MESSAGE VARCHAR(4000)) 
      INSERT INTO ADV_SQLERRS VALUES ('DUP_VAL_ON_INDEX',-1,'ORA-00001: unique constraint (.) violated' ) 
      INSERT INTO ADV_SQLERRS VALUES ('INVALID_CURSOR',-1001,'ORA-01001: invalid cursor') 
      INSERT INTO ADV_SQLERRS VALUES ('INVALID_NUMBER',-1722,'ORA-01722: invalid number') 
      INSERT INTO ADV_SQLERRS VALUES ('ZERO_DIVIDE',-1476,'ORA-01476: divisor is equal to zero') 
      INSERT INTO ADV_SQLERRS VALUES ('TOO_MANY_ROWS',-1422,'ORA-01422: exact fetch returns more than requested number of rows') 
      INSERT INTO ADV_SQLERRS VALUES ('NO_DATA_FOUND',100,'ORA-01403: no data found') 
      INSERT INTO ADV_SQLERRS VALUES ('ACCESS_INTO_NULL',-6530,'ORA-06530: Reference to uninitialized composite') 
       INSERT INTO ADV_SQLERRS VALUES ('CURSOR_ALREADY_OPEN',-6511,'ORA-06511: PL/SQL: cursor already open') 
      INSERT INTO ADV_SQLERRS VALUES ('VALUE_ERROR',-6502,'ORA-06502: PL/SQL: numeric or value error') 
 END 
 GO

--ADVENTNET SCRIPTS to be executed
EXEC POPULATE_SQLERRM
GO

--ADVENTNET DROP SCRIPTS
IF Exists ( SELECT name FROM sysobjects 
            WHERE name = 'ADV_SET_EXCEPTION'            AND type = 'P')
            DROP PROCEDURE ADV_SET_EXCEPTION
            GO

 CREATE PROCEDURE ADV_SET_EXCEPTION ( @name VARCHAR(50) )
 AS
  BEGIN
       DECLARE @context_info_var VARBINARY(128)
       DECLARE @len INTEGER
       SELECT @len = LEN(@name)
       WHILE @len < 30
       BEGIN
               SELECT @name = @name + SPACE(1)
               SELECT @len = @len + 1
       END
       SELECT @context_info_var = CAST (@name AS VARBINARY(128))
       SET CONTEXT_INFO @context_info_var
  END 
 GO

 --ADVENTNET DROP SCRIPTS
IF Exists ( SELECT name FROM sysobjects 
            WHERE name = 'ADV_GET_SQLERRM'            AND type = 'FN')
            DROP FUNCTION ADV_GET_SQLERRM
            GO

 CREATE FUNCTION ADV_GET_SQLERRM (@name VARCHAR(50) )
  RETURNS VARCHAR(4000)
  AS
  BEGIN
         IF ISNUMERIC(@name) = 1
         BEGIN
                RETURN 'User-Defined Exception'
         END
         DECLARE @context_info_var VARBINARY(128)
         DECLARE @adv_sqlErrm VARCHAR(4000)
         SELECT @context_info_var = CONTEXT_INFO  FROM master.dbo.sysprocesses WHERE SPID=@@SPID
         SELECT @adv_sqlErrm = CAST (@context_info_var AS VARCHAR)
         SELECT @adv_sqlErrm = SUBSTRING(@adv_sqlErrm,1,30)
         SELECT @adv_sqlErrm = RTRIM(@adv_sqlErrm)
         SELECT @adv_sqlErrm = error_message FROM adv_sqlerrs WHERE name = @adv_sqlErrm
         RETURN @adv_sqlErrm
  END
 GO

 --ADVENTNET DROP SCRIPTS
IF Exists ( SELECT name FROM sysobjects 
            WHERE name = 'ADV_GET_SQLCODE'            AND type = 'FN')
            DROP FUNCTION ADV_GET_SQLCODE
            GO

 CREATE FUNCTION ADV_GET_SQLCODE (@name VARCHAR(50) )
  RETURNS INTEGER
  AS
  BEGIN
         IF ISNUMERIC(@name) = 1
         BEGIN
                 RETURN 1
         END
         DECLARE @context_info_var VARBINARY(128)
         DECLARE @adv_sqlErrm VARCHAR(4000)
         DECLARE @adv_sqlcode INTEGER
         SELECT @context_info_var = CONTEXT_INFO  FROM master.dbo.sysprocesses WHERE SPID=@@SPID
         SELECT @adv_sqlErrm = CAST (@context_info_var AS VARCHAR)
         SELECT @adv_sqlErrm = SUBSTRING(@adv_sqlErrm,1,30)
         SELECT @adv_sqlErrm = RTRIM(@adv_sqlErrm)
         SELECT @adv_sqlcode = error_code FROM adv_sqlerrs WHERE name = @adv_sqlErrm
         RETURN @adv_sqlcode
  END
  GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: Arun kumar 
-- Create date: 25 JUN 2009
-- Description: Testing 
-- =============================================
CREATE PROCEDURE SUMOFTWO

AS

BEGIN

declare @a int 
declare @b int 
declare @c int 

Set @a=10
Set @b=20

Set @c=@a+@b

print @c
select @c

END
GO

/* @(#)C:\AdventNet\SwisSQL\SQLServerToOracle3.2/testing_PL.sql  - Generated by AdventNet SwisSQL (SQLServer To oracle) Conversion tool.*/


 -- ============================================= 
-- Author: Arun kumar  
-- Create date: 25 JUN 2009 
-- Description: Testing  
-- ============================================= 
CREATE OR REPLACE PROCEDURE SUMOFTWO
(
	RCT1                        IN  OUT 	GLOBALPKG.RCT1
)
AS
	a                          int;
	b                          int;
	c                          int;  
	BEGIN  	
		a  :=  10; 	
		b  :=  20; 	
		c  :=  a + b; 
		DBMS_OUTPUT.PUT_LINE(  CAST(c AS VARCHAR2));
		
		OPEN RCT1 FOR 
		SELECT SUMOFTWO.c
		FROM  SYS.DUAL;
	END;
/

/* @(#)GLOBALPKG.sql  - Generated by AdventNet SwisSQL (SQLServer To oracle) Conversion tool.*/
CREATE OR REPLACE PACKAGE GLOBALPKG
AS
	TYPE RCT1 IS REF CURSOR;
	TRANCOUNT INTEGER := 0;
	IDENTITY INTEGER;
END;
/