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++.

 //test for pjlib   heat nan
 // string
 #include<pjlib.h>
 #include<pj/string.h>
 #include<stdio.h>
 void compare(const pj_str_t* s1,const pj_str_t* s2)
 {

     pj_status_t status;
     status=pj_strcmp(s1,s2);
     if(status<)
     {
         printf("s1<s2\n");
     }
     else if(status==)
     {
         printf("s1=s2\n");
     }
     else
     {
         printf("s1>s2\n");
     }
 }
 int main()
 {
     char *str="this is a string";
     pj_status_t status;
     pj_str_t s1,s2,s3;
     status=pj_init();
     if(status!=PJ_SUCCESS)
     {
         printf("pj_init failed\n");
     }
     s1=pj_str("helloworld");
     s2=pj_str("heat nan");

     printf("s1=%s\n",s1.ptr);
     printf("s2=%s\n",s2.ptr);
     printf("len1=%d;len2=%d\n",s1.slen,s2.slen);
     //Create string initializer from a normal C string
     //pj_str_t pj_str     (     char *      str    )
     printf("now we use the function pj_str creat a pj_str_t type string from normal C string");
     s3=pj_str(str);
     puts(s3.ptr);
     printf("****************************************\n");
     //

     //function pj_strcmp
     printf("now we have a compare about the the two string!\n");
     compare(&s1,&s2);
     printf("****************************************\n");

     pj_shutdown();
     getchar();
     return ;

 }

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

 //PJLIB I/O
 //file open
 //heat nan
 //describe:  open the file and write "heat nan" in it;and then read from it
 #include<pjlib.h>
 #include<stdio.h>
 #define FILENAME "helloworld.txt"
 int main()
 {
     pj_status_t status;
     pj_oshandle_t fd=;
     pj_size_t length;
     static char buffer[]={"heat nan!"};
     char readbuffer[sizeof(buffer)+];
     status=pj_init();//must
     if(status!=PJ_SUCCESS)
     {
         printf("pj_init failed!\n");
     }
     PJ_LOG(,(" ","file open test"));

     if(pj_file_exists(FILENAME))
     {
         pj_file_delete(FILENAME);
     }

     status=pj_file_open(NULL,FILENAME,PJ_O_WRONLY,&fd);
     if(status!=PJ_SUCCESS)
     {
         PJ_LOG(,(" ","open file failed!"));
         return ;
     }
     else
     {
         PJ_LOG(,(" ","file open successed!"));
     }

     length=sizeof(buffer);

     status=pj_file_write(fd,buffer,&length);
     if(status!=PJ_SUCCESS)
     {
        PJ_LOG(,(" ","write the file failed!"));
     }

     pj_file_close(fd);

     //now we check the file weather exist
     if(!pj_file_exists(FILENAME))
     {
         PJ_LOG(,(" ","Sorry! the file you want is not exist!"));
         return ;
     }
     else
     {
         PJ_LOG(,(" ","Yeah! the file exist!"));
     }

     // now we will show you the content of the file
     status=pj_file_open(NULL,FILENAME,PJ_O_RDONLY,&fd);
     if(status!=PJ_SUCCESS)
     {
         PJ_LOG(,(" ","open file failed!"));
     }
     length=;
     while((pj_ssize_t)length<sizeof(readbuffer))
     {
         pj_ssize_t read;
         read=;
         status=pj_file_read(fd,&readbuffer[length],&read);
         if(status!=PJ_SUCCESS)
         {
             PJ_LOG(,(" ","read the file failed!"));
             return ;
         }
         if(read==)//EOF   the end of the text
         {
             break;
         }
         length+=read;

     }
     puts(readbuffer);
     pj_shutdown();
     getchar();

 }