loadrunner字符串處理函數

 在Loadrunner中提供了C對字符串出了的相關功能函數，如下：

lr_save_datetime	把當前日期和時間保存到一個參數中
lr_save_int	把一個整數保存爲參數
lr_save_searched_string	保存一個字符數組相對於字符串出現的部分。
lr_save_string	把一個字符串保存到參數中
lr_save_var	把字符串的一部分內容保存爲參數
lr_eval_string	返回參數的實際內容或返回一個包含參數的字符串的實際內容

 下面我們將對這些函數作一一說明，並舉例實踐。

void lr_save_datetime(const char *format, int offset, const char *name);

參數解釋： 

format	所檢索的日期/時間信息的格式
offset	當前日期和時間的偏移量, 採用形式有: DATE_NOW, TIME_NOW, ONE_DAY, ONE_HOUR, ONE_MIN. 例如： TIME_NOW + ONE_HOUR
name	保存的參數名稱，用來存儲日期/時間信息。

例子：

Action() { lr_save_datetime("Tomorrow is %B %d %Y", DATE_NOW + ONE_DAY, "next"); lr_output_message(lr_eval_string("{next}")); return 0; }

運行結果爲：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(5): Tomorrow is 七月 06 2011
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_int ( int value, const char *param_name);

參數解釋： 

value	將要保存到參數得整數值
param_name	保存的參數名稱

例子：

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

運行結果爲：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(6): 10
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_searched_string (const char *buffer, long buf_size, unsigned int occurrence, const char *search_string, int offset, unsigned int string_len, const char *parm_name );

參數解釋：

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, set occurrence to 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.

例子：

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; }

運行結果爲：

Running Vuser...
Starting iteration 1.
Starting action Action.
Action.c(9): Fannys_brother=Will
Ending action Action.
Ending iteration 1.
Ending Vuser...

int lr_save_string (const char *param_value, const char *param_name);

int lr_save_var (const char *param_value, unsigned long const value_len, unsigned long const options, const char *param_name);

char *lr_eval_string (const char *instring );

     以上三個函數我們經常會用在一起。例如：

例子：

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.
Action.c(5): 8
Action.c(6): 7
Action.c(9): ShortName=testaaa
Action.c(10): ShortName=testaaa
Ending action Action.
Ending iteration 1.

      *****注：在loadrunner中，字符串處理函數用的比較多，其用法也比較簡單。多加以練習操作，在項目實踐中可以很快的做到得心應手。*****