/*
!C ********************************************************************
!Description:

  Integer function land_night.c
  Computes the initial clear sky confidence for nighttime land pixels.
  Called from perform_cloud_tests.c

!Input arguments:
  none

  Inputs from structure variable 'pxin' of type "pixel_in" defined in
  pixel.h.

!Output arguments:
  none

  int return_code   returns number of cloud tests performed
                    (returned through function call)

  Output initial clear sky confidence and associated data stored in
  structure variable 'pxout' of type "pixel_out" defined in pixel.h.

!Revision History:
  R. Frey           10/2007      Converted to C


!Team-unique Header:

!References and Credits:

!END ******************************************************************/

/* Includes */

#include <stdio.h>
#include "pixel.h"


int land_night()

{

/*  Declarations */

   extern int landnight();
   extern int night_snow(int lnd);
  
   int return_code;
   int ret_code;
   int lnd;

/*  Initializations */
    return_code = 0;

/* Get initial clear sky confidence for current pixel.
   night_snow is called in the case of snow-covered land.
*/

   if (pxin.snow || pxin.ice) {

     lnd = 1;
     ret_code = night_snow(lnd);
      
   } 
   
   else {
        
      ret_code = landnight();
 
   }

   return_code = ret_code;
   return return_code;
   
}