Loadrunner的字符串处理函数

1)strcat编辑本段回目录

  char *strcat ( char *to, const char *from ); 
  功能:链接两个字符串。 

  例子: 
  这个例子是用strcat链接字符串:Cheers_Lee和 @hotmail.com

  脚本如下: 
char test[1024], *a = "@hotmail.com"; 
strcpy(test, "Cheers_Lee"); 
strcat(test, a); 
lr_output_message("We can see %s",test); 

  运行后在executon log中看到如下语句: 
Starting action Action. 
Action.c(16): We can see [email protected]  

2)strchr编辑本段回目录

  char *strchr ( const char *string, int c ); 
   功能:返回字符串中指定字符后面的字符串。 

   例子: 
  这个例子是返回第一个出现e字符以后所有的字符,和最后一次出现e字符以后所有的字符。 

   脚本如下: 
char *string = "Cheers is a tester"; 
char *first_e, *last_e; 
first_e = (char *)strchr(string, 'e'); 
lr_output_message("We can see the first occurrence of e: %s",first_e); 
last_e = (char *)strrchr(string, 'e'); 
lr_output_message("We can see the last occurrence of e: %s", last_e); 


  运行后在executon log中看到如下语句: 

Starting action Action. 
Action.c(12): We can see the first occurrence of e: eers is a tester 
Action.c(14): We can see the last occurrence of e: er   

3)Strcmp&stricmp编辑本段回目录

  int strcmp ( const char *string1, const char *string2 );大小写敏感。 
  int stricmp ( const char *string1, const char *string2 );大小写不敏感。 
  功能:比较字符串。

  例子: 
  按是否区分大小写对比两个字符串,并打印出它们的大小关系。 

  脚本如下: 
int result; 
char tmp[20]; 
char string1[] = "We can see the string:Cheers"; 
char string2[] = "We can see the string:cheers"; 
result = strcmp( string1, string2 ); 
if( result > 0 ) 
strcpy( tmp, "大于" ); 
else if( result < 0 ) 
strcpy( tmp, "小于" ); 
else 
strcpy( tmp, "等于" ); 
lr_output_message( "strcmp: String 1 %s string 2", tmp ); 
result = stricmp( string1, string2 ); 
if( result > 0 ) 
strcpy( tmp, "大于" ); 
else if( result < 0 ) 
strcpy( tmp, "小于" ); 
else 
strcpy( tmp, "等于" ); 
lr_output_message( "stricmp: String 1 %s string 2", tmp ); 

  运行后在executon log中看到如下语句: 

Starting action Action. 
Action.c(22): strcmp: String 1 小于 string 2 
Action.c(33): stricmp: String 1 等于 string 2 

4)strcpy编辑本段回目录

  char *strcpy ( char *dest, const char *source ); 
   功能:复制一个字符串到另一个字符串中。 

   例子: 
  复制一个字符串到字符数组中,并打印出来。 

   脚本如下: 
char test[1024]; 
strcpy(test, "what can we see?"); 
lr_output_message("%s", test); 

  运行后在executon log中看到如下语句: 

Starting action Action. 
Action.c(10): what can we see?   

5)Strdup& strlwr编辑本段回目录

  char *strdup ( const char *string ); 
   功能:复制一个字符串。 
  char *strlwr ( char *string ); 
   功能:转换成小写字母。 

   例子: 
  在这个例子中,Vuser的组名被转换为小写字母。但是lr_whoami把组名作为静态buffer返回。这样的buffer不能被操作。如果有操作需要,就复制这个静态buffer。 

   脚本如下: 
int id; 
char *groupname_static, *groupname; 
lr_whoami(&id, &groupname_static, NULL); 
lr_output_message("groupname=%s", groupname_static); 
groupname = (char *)strdup(groupname_static); 
groupname = (char *)strlwr(groupname); 
lr_output_message("lower case groupname=%s", groupname); 
free(groupname); 

  上述脚本用vugen保存为:CHANGE 
  在controller中运行(设置为总是发送消息) 
  运行后在log中看到如下语句: 
Starting action Action. [MsgId: MMSG-15919] 
Action.c(11): groupname=CHANGE [MsgId: MMSG-17999] 
Action.c(16): lower case groupname=change [MsgId: MMSG-17999]  

6)Strlen编辑本段回目录

  size_t strlen ( const char *string ); 
   功能:返回字符串长度(bytes). 

   例子: 
  这个例子很简单,就是得到一个字符串中的字符的个数。然后打印出来。 

   脚本如下: 
Starting action Action. [MsgId: MMSG-15919] 
Action.c(11): groupname=CHANGE [MsgId: MMSG-17999] 
Action.c(16): lower case groupname=change [MsgId: MMSG-17999] 

  运行后在log中看到如下语句: 

Action.c(13): The sentence has 18 letters 

7)Strncat编辑本段回目录

  char *strncat ( char *to_string, const char *from_string, size_t n ); 
   功能:把一个字符串连接到另一个字符串后面。 

   例子: 
  在这里,我随便写了两个字符串,用此函数把他们连接起来,并打印出来。 

   脚本如下: 
char str1[]="Cheers is "; 
char str2[]="a tester."; 
lr_output_message("What can we see?"); 
lr_output_message("The str1 is %s.",str1); 
strncat(str1,str2,20); 
lr_output_message("The str1 is %s.",str1); 

  运行后在log中看到如下语句: 

Action.c(9): What can we see? 
Action.c(10): The str1 is Cheers is . 
Action.c(13): The str1 is Cheers is a tester.. 

  注:我们可以看到,没有连接前的str1是:Cheers is,连接后的字符串是:Zee is a tester。也可以看看strcat函数。  

8)strncmp编辑本段回目录

  int strncmp ( const char *string1, const char *string2, size_t n ); 
   功能:对比两个字符串的前n位。 

   例子: 
  对比两个字符串,并把对比结果打印出来。这里我和上面的strcmp一起写。 

   脚本如下: 
char result; 
char str1[]="Cheers is a tester."; 
char str2[]="Cheers is a tester."; 
char str3[]="Cheers is a tester?"; 
result = strcmp(str1,str2); 
if(result > 0) 
lr_output_message("str1 is greater than str2."); 
else if(result < 0) 
lr_output_message("str1 is less than str2."); 
else 
lr_output_message("str1 is equal to str2."); 
result = strncmp( str1, str3 , 30); 
if(result > 0) 
lr_output_message("str1 is greater than str3."); 
else if(result < 0) 
lr_output_message("str1 is less than str3."); 
else 
lr_output_message("str1 is equal to str3."); 

  运行后在log中看到如下语句: 
Starting iteration 1. 
Starting action Action. 
Action.c(18): str1 is equal to str2. 
Action.c(28): str1 is less than str3.

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