PJSIP-PJLIB（samples) (the usage of the pjlib lib) (eg:string/I/O)

 Here are some samples about  PJLIB!

PJLIB is the basic lib of PJSIP, so we need master the lib first!

String:

In our project, string is often used.But in a project based on PJSIP,we should learn to use pj_str_t instead of  C string.Of course there have lots functions  for you to convert the string type.

First you should know the struct of pj_str_t,and you need to  use the function of pj_str to creat a pj_str_t type from a normal C string.

And lots of function are same like the C/C++ stytle,you can use them easily if you know the C/C++.

 1 //test for pjlib   heat nan

 2 // string

 3 #include<pjlib.h>

 4 #include<pj/string.h>

 5 #include<stdio.h>

 6 void compare(const pj_str_t* s1,const pj_str_t* s2)

 7 {

 8     

 9     pj_status_t status;

10     status=pj_strcmp(s1,s2);

11     if(status<0)

12     {

13         printf("s1<s2\n");

14     }

15     else if(status==0)

16     {

17         printf("s1=s2\n");

18     }

19     else 

20     {

21         printf("s1>s2\n");

22     }

23 }

24 int main()

25 {

26     char *str="this is a string";

27     pj_status_t status;

28     pj_str_t s1,s2,s3;

29     status=pj_init();

30     if(status!=PJ_SUCCESS)

31     {

32         printf("pj_init failed\n");

33     }

34     s1=pj_str("helloworld");

35     s2=pj_str("heat nan");

36 

37   

38     printf("s1=%s\n",s1.ptr);

39     printf("s2=%s\n",s2.ptr);

40     printf("len1=%d;len2=%d\n",s1.slen,s2.slen);

41     //Create string initializer from a normal C string

42     //pj_str_t pj_str     (     char *      str    ) 

43     printf("now we use the function pj_str creat a pj_str_t type string from normal C string");

44     s3=pj_str(str);

45     puts(s3.ptr);

46     printf("****************************************\n");

47     //

48 

49     //function pj_strcmp

50     printf("now we have a compare about the the two string!\n");

51     compare(&s1,&s2);

52     printf("****************************************\n");

53     

54     pj_shutdown();

55     getchar();

56     return 0;

57 

58 }

View Code

 INPUT/OUTPUT:

FILE I/O:

Use the functions (eg pj_file_open,pj_file_read) operating the file.

Related documations :

http://www.pjsip.org/docs/latest/pjlib/docs/html/group__PJ__FILE__IO.htm

http://www.pjsip.org/docs/latest/pjlib/docs/html/group__PJ__FILE__ACCESS.htm

 1 //PJLIB I/O

 2 //file open

 3 //heat nan

 4 //describe:  open the file and write "heat nan" in it;and then read from it 

 5 #include<pjlib.h>

 6 #include<stdio.h>

 7 #define FILENAME "helloworld.txt"

 8 int main()

 9 {

10     pj_status_t status;

11     pj_oshandle_t fd=0;

12     pj_size_t length;

13     static char buffer[11]={"heat nan!"};

14     char readbuffer[sizeof(buffer)+16];

15     status=pj_init();//must

16     if(status!=PJ_SUCCESS)

17     {

18         printf("pj_init failed!\n");

19     }

20     PJ_LOG(3,(" ","file open test"));

21     

22     if(pj_file_exists(FILENAME))

23     {

24         pj_file_delete(FILENAME);

25     }

26 

27     status=pj_file_open(NULL,FILENAME,PJ_O_WRONLY,&fd);

28     if(status!=PJ_SUCCESS)

29     {

30         PJ_LOG(3,(" ","open file failed!"));

31         return 0;

32     }

33     else

34     {

35         PJ_LOG(3,(" ","file open successed!"));

36     }

37 

38     length=sizeof(buffer);

39 

40     status=pj_file_write(fd,buffer,&length);

41     if(status!=PJ_SUCCESS)

42     {

43        PJ_LOG(3,(" ","write the file failed!"));

44     }

45 

46     pj_file_close(fd);

47 

48     //now we check the file weather exist

49     if(!pj_file_exists(FILENAME))

50     {

51         PJ_LOG(3,(" ","Sorry! the file you want is not exist!"));

52         return 0;

53     }

54     else

55     {

56         PJ_LOG(3,(" ","Yeah! the file exist!"));

57     }

58 

59     // now we will show you the content of the file

60     status=pj_file_open(NULL,FILENAME,PJ_O_RDONLY,&fd);

61     if(status!=PJ_SUCCESS)

62     {

63         PJ_LOG(3,(" ","open file failed!"));

64     }

65     length=0;

66     while((pj_ssize_t)length<sizeof(readbuffer))

67     {

68         pj_ssize_t read;

69         read=1;

70         status=pj_file_read(fd,&readbuffer[length],&read);

71         if(status!=PJ_SUCCESS)

72         {

73             PJ_LOG(3,(" ","read the file failed!"));

74             return 0;

75         }

76         if(read==0)//EOF   the end of the text

77         {

78             break;

79         }

80         length+=read;

81 

82     }

83     puts(readbuffer);

84     pj_shutdown();

85     getchar();

86 

87      

88 }

View Code