LoadRunner string processing function

The LoadRunner provides C functions related to the string as follows:

Lr_save_datetime	Save the current date and time to a parameter.
Lr_save_int	Save an integer as a parameter
Lr_save_searched_string	Saves the portion of a character array relative to a string.
Lr_save_string	Saves a string to a parameter.
Lr_save_var	Save part of the string as a parameter
Lr_eval_string	Returns the actual content of a parameter or the actual content of a string containing the parameter.

The following describes these functions and provides examples.

VoidLr_save_datetime (Const char *Format,IntOffset,Const char *Name);

Parameter description: 

Format	Format of the retrieved date/time information
Offset	The offset of the current date and time, in the form of date_now, time_now, one_day, one_hour, one_min. Example: time_now + one_hour
Name	The name of the saved parameter to store the date/time information.

Example:

Action()
{
    lr_save_datetime("Tomorrow is %B %d %Y", DATE_NOW + ONE_DAY, "next"); 

    lr_output_message(lr_eval_string("{next}")); 

return 0;
}

The running result is:

Running vuser...
Starting iteration 1.
Starting action.
Action. C (5): Tomorrow is July 06 2011
Ending action.
Ending iteration 1.
Ending vuser...

IntLr_save_int (IntValue, Const char *Param_name);

Parameter description: 

Value	The integer to be saved to the parameter
Param_name	Saved parameter name

Example:

Action()
{
int num;
    num = 5;
    lr_save_int(num * 2, "param1"); 
    lr_output_message(lr_eval_string("{param1}")); 
return 0;
}

The running result is:

Running vuser...
Starting iteration 1.
Starting action.
Action. C (6): 10
Ending action.
Ending iteration 1.
Ending vuser...

IntLr_save_searched_string(Const char *Buffer, LongBuf_size, Unsigned intOccurrence, Const char *Search_string, IntOffset, Unsigned intString_len, Const char *Parm_name);

Parameter description:

Buffer	The string or carray buffer, part of whose contents you want to save.
Buf_size	The buffer size.
Occurrence	The occurrence number of the search_string (0-based count). For example, if the search_string occurs three times, and you want the second occurrence, SetOccurrenceTo 1.
Search_string	The string to search for in the buffer.
Offset	The number of characters to skip after the end of the search string occurrence.
String_len	The number of characters to save.
Parm_name	Parameter name to be used in subsequent LR statements to refer to the saved information. Name is enclosed in double-quotes.

Example:

Action()
{
char cBuff[] = "abc Emma Woodhouse abc Elizabeth Bennet abc William Price";
    lr_save_searched_string(cBuff, strlen(cBuff),
2, "abc", // Search for third occurrence of "abc"
                            1,        // Skip the space after "abc" 
                            4,           // Put the next four characters... 
                            "Fannys_brother"); // ... in parameter Fannys_brother. 
    lr_output_message("%s",lr_eval_string("Fannys_brother={Fannys_brother}"));

return 0;
}

The running result is:

Running vuser...
Starting iteration 1.
Starting action.
Action. C (9): fannys_brother = Will
Ending action.
Ending iteration 1.
Ending vuser...

IntLr_save_string (Const char *Param_value, Const char *Param_name);

IntLr_save_var (Const char *Param_value, Unsigned long constValue_len, Unsigned long constOptions, Const char *Param_name);

Char *Lr_eval_string (Const char *Instring);

These three functions are often used together. For example:

Example:

Action() 

{
    lr_save_string("testaaaab", "InName");
    lr_output_message("%d",strlen("{InName}"));
    lr_output_message("%d",strlen("{InName}")-1);
    lr_save_var( lr_eval_string("{InName}"),
                 strlen("{InName}")-1, 0, "ShortName");
    lr_output_message("%s",lr_eval_string("ShortName={ShortName}"));
    lr_output_message("ShortName=%s",lr_eval_string("{ShortName}"));

return 0; 

}

Starting iteration 1.
Starting action.
Action. C (5): 8
Action. C (6): 7
Action. C (9): shortname = testaaa
Action. C (10): shortname = testaaa
Ending action.
Ending iteration 1.

* *** Note: In LoadRunner, many string processing functions are used and their usage is simple. You can practice more quickly in project practice. *****