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(); }
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