/*
FILE:           receiver.c

DESCRIPTION:This is a C simpl receiver.

USAGE:          receiver
*/

// include required headers
#include <stdio.h>
#include <stdlib.h>
#include <simpl.h>

// define possible message structures
typedef struct
        {
        int token;
        int var1;
        int var2;
        int var3;
        } MSG1;

int main()
{
char *me = "PIRECEIVER";
char *sender;
char inmem[1024];
char outmem[1024];
int n;
MSG1 *in1;
MSG1 *out1;
int *token;

// perform simpl name attach
if (name_attach(me, NULL) == -1)
    {
    printf("%s: cannot attach name-%s\n",me,whatsMyError());
    exit(-1);
    }

while (1)
    {
    // receive incoming messages
    n = Receive(&sender, inmem, 1024);
    if (n == -1)
         {
         printf("%s: Receive error-%s\n", me, whatsMyError());
         continue;
         }

    // set a pointer to the value of the message token
    token = (int *)inmem;

    // decide course of action based on the value of the token
    switch (*token)
          {
          case 10:
               in1 = (MSG1 *)inmem;
/*
               printf("token=%dvar1=%d var2=%d var3=%d\n",
                    in1->token,
                    in1->var1,
                    in1->var2,
                    in1->var3);
*/
               //reply to sender
               out1 = (MSG1 *)outmem;
               out1->token=10;
               out1->var1=in1->var1+in1->var2+in1->var3;
               Reply(sender, outmem, 1024);
               break;

          default:
               out1 = (MSG1 *)outmem;
               out1->token=99;
/*
               printf("%s:unknown token=%d\n",me,*token);
*/
               Reply(sender, outmem, 1024);
          }

    }

return(0);
}