update comport.c

guowenxue

2021-07-17 07c6a700ba2a88231545844531f766ffd8b2d2a1

 booster/comport.c

@@ -281,7 +281,7 @@
int comport_send(comport_t *comport, char *buf, int send_bytes)
{
    int                         rv = 0;
    char                       *ptr, *end;
    char                       *ptr, left_bytes;
    int                         send = 0;

    if ( !comport || !buf || send_bytes<=0 )
@@ -300,48 +300,28 @@

    //printf("Send %s with %d bytes.\n", buf, send_bytes);

    // Large data, then slice them and send
    if (comport->frag_size < send_bytes)
    {
        ptr = buf;
        end = buf + send_bytes;

        do
        {
            // Large than frag_size
            if (comport->frag_size < (end - ptr))
            {
                send = write(comport->fd, ptr, comport->frag_size);
                if (0 >= send || comport->frag_size != send)
                {
                    rv = -4;
                    goto CleanUp;
                }
                ptr += comport->frag_size;
            }
            else   // Less than frag_size, maybe last fragmention.
            {
                send = write(comport->fd, ptr, (end - ptr));
                if (0 >= send || (end - ptr) != send)
                {
                    rv = -4;
                    goto CleanUp;
                }
                ptr += (end - ptr);
            }
        }
        while (ptr < end);
    }
    else                        // The send data is not large than a fragmention.
    left_bytes = send_bytes;
    ptr = buf;

    while( left_bytes > 0 )
    {
        send = write(comport->fd, buf, send_bytes);
        if (0 >= send || send_bytes != send)
        {
            rv = -5;
            goto CleanUp;
        }
        /* Large data, then slice them to frag and send */
   send = left_bytes>comport->frag_size ? comport->frag_size : left_bytes;
	
   rv = write(comport->fd, ptr, send);
          if( rv<0 )
          {
             rv = -4;
             goto CleanUp;
          } 
	
   left_bytes -= rv; 
   ptr += rv; 
    }

    rv = 0;

CleanUp:
    return rv;
}