source: npl/mediabox/lcdproc_edwin/src/clients/lcdproc/mode.c

/*
 * This file contains status-gathering code *and* modescreen functions.
 * It's long, and messy.
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef IRIX
#include <strings.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <sys/utsname.h>

#include "../../shared/sockets.h"

#include "mode.h"
#include "main.h"

#include "batt.h"
#include "chrono.h"
#include "cpu.h"
#include "disk.h"
#include "load.h"
#include "mem.h"
#include "net.h"

int ELLIPSIS='-';

// TODO: Clean this up...  Support multiple display sizes..

char buffer[1024];
char host[16];

void reread(int f, char *errmsg);
int getentry(const char *tag, const char *bufptr);


int mode_init(mode *sequence) 
{
   int i;
   struct utsname Uname;

   // Grab the host name
   if(0 > uname(&Uname))
   {
      perror("Can't get hostname");
      strcpy(host, "host");
   }
   else
   {
      strncpy(host, Uname.nodename, 15);
      host[16]=0;
      if(index(host,'.')) // truncate at the first dot
         *(index(host, '.'))='\0'; 
      for(i=0; i<16; i++)
         if(host[i] == '\n') host[i]=0;
   }

   // Init all the modescreens we need
   for(i=0; sequence[i].which > 1; i++)
   {
      switch(sequence[i].which)
      {
         case 'g':
         case 'G': // cpu_graph_screen
            cpu_init();
            break;
         case 'n':
         case 'N': // cpu_graph_screen
            net_init();
            break;
         case 'c':
         case 'C': // cpu_screen
            cpu_init();
            break;
         case 'o':
         case 'O': // clock_screen
            chrono_init();
            break;
         case 'k':
         case 'K': // big_clock_screen
            chrono_init();
            break;
         case 'm':
         case 'M': // mem_screen
            mem_init();
            break;
         case 's':
         case 'S': // mem_info_screen
            mem_init();
            break;
         case 'u':
         case 'U': // uptime_screen
            chrono_init();
            break;
         case 't':
         case 'T': // time_screen
            chrono_init();
            break;
         case 'd':
         case 'D': // disk_screen
            disk_init();
            break;
         case 'x':
         case 'X': // xload_screen
            load_init();
            break;
         case 'b':
         case 'B': // battery_screen
            batt_init();
            break;
         case 'a':
         case 'A': // credit_screen
            break;
         default: break;
      }
   }
   

  
  return 0; 
}

void mode_close() 
{
   batt_close();
   chrono_close();
   cpu_close();
   disk_close();
   load_close();
   mem_close();
  
}


int update_screen(mode *m, int display)
{
   static int status = -1;
   int old_status = status;
   
   if(m)
   {
      switch(m->which)
      {
         case 'g':
         case 'G': status = cpu_graph_screen(m->timer, display); break;
         case 'n':
         case 'N': status = net_screen(m->timer, display); break;
         case 'c':
         case 'C': status = cpu_screen(m->timer, display); break;
         case 'o':
         case 'O': status = clock_screen(m->timer, display); break;
         case 'k':
         case 'K': status = big_clock_screen(m->timer, display); break;
         case 'm':
         case 'M': status = mem_screen(m->timer, display); break;
         case 's':
         case 'S': status = mem_top_screen(m->timer, display); break;
         case 'u':
         case 'U': status = uptime_screen(m->timer, display); break;
         case 't':
         case 'T': status = time_screen(m->timer, display); break;
         case 'd':
         case 'D': status = disk_screen(m->timer, display); break;
         case 'x':
         case 'X': status = xload_screen(m->timer, display); break;
         case 'b':
         case 'B': status = battery_screen(m->timer, display); break;
         case 'a':
         case 'A': status = credit_screen(m->timer, display); break;
         default: break;
      }
      /* Debugging tool...
      if(display)
      {
         printf("Displayed Mode %c\n", m->which);
      }
      */
   }
      
   if(status != old_status)
   {
      if(status == BACKLIGHT_OFF)
      {
         sock_send_string(sock, "backlight off\n");
      }
      if(status == BACKLIGHT_ON)
      {
         sock_send_string(sock, "backlight on\n");
      }
      if(status == BLINK_ON)
      {
         sock_send_string(sock, "backlight blink\n");
      }
   }   
   return status;

}


void reread(int f, char *errmsg) 
{
  if (lseek(f, 0L, 0) == 0 && read(f, buffer, sizeof(buffer) - 1 ) > 0 )
    return;
  perror(errmsg);
  exit(1); 
}

int getentry(const char *tag, const char *bufptr) 
{
  char *tail;
  int retval, len = strlen(tag);

  while (bufptr) 
  {
    if (*bufptr == '\n') bufptr++;
    if (!strncmp(tag, bufptr, len)) 
    {
      retval = strtol(bufptr + len, &tail, 10);
      if (tail == bufptr + len) return -1; 
      else return retval; 
    }
    bufptr = strchr( bufptr, '\n'); 
  }
  return -1; 
}


///////////////////////////////////////////////////////////////////////////
//////////////////////// Let the Modes Begin! /////////////////////////////
///////////////////////////////////////////////////////////////////////////

// Er, these have been moved..  :)

char tmp[1024];




////////////////////////////////////////////////////////////////////////
// Credit Screen shows who wrote this...
//
int credit_screen(int rep, int display)
{
   static int first = 1;
   
   if(first)
   {
      first = 0;
      
      sock_send_string(sock, "screen_add A\n");
      sock_send_string(sock,
                       "screen_set A name {Credits for LCDproc}\n");
      sock_send_string(sock, "widget_add A title title\n");
      sprintf(tmp, "widget_set A title {LCDPROC %s}\n", version);
      sock_send_string(sock, tmp);
      if(lcd_hgt >= 4)
      {
         sock_send_string(sock, "widget_add A one string\n");
         sock_send_string(sock, "widget_add A two string\n");
         sock_send_string(sock, "widget_add A three string\n");
         sock_send_string(sock,
                          "widget_set A one 1 2 {     for Linux      }\n");
         sock_send_string(sock,
                          "widget_set A two 1 3 { by William Ferrell}\n");
         sock_send_string(sock,
                          "widget_set A three 1 4 { and Scott Scriven}\n");
      }
      else
      {
         sock_send_string(sock, "widget_add A text scroller\n");
         sock_send_string(sock,
                          "widget_set A text 1 2 20 2 v 8 {     for Linux       by William Ferrell and Scott Scriven}\n");
      }
   }

   return 0;
} // End credit_screen()