/****************************************************************************
*
* allocdata
*
*   Allocates necessary space for the passed structures to hold one scanline 
*   of data. 
*    
* ARGUMENTS:
*    Name    Type              Description
*    ----    ----              ----------- 
*   *data    struct std_data   Pointer to std_data structure to hold data    
*    pixels  short             Pixels per scanline for these data    
*    fields  short             Fields per pixel for these data    
*    
* RETURNS:
*    0  if successful
*   -1  if suspect arguments passed
*   -2  if unable to allocate space    
*
*****************************************************************************/
#include <stdlib.h>
#include <malloc.h>
#include "common_structures"

 int allocdata ( struct std_data *data, short pixels, short fields ) 

 {

 int  error_flag = 0 ;
 int  i ;

 /** Check for valid arguments **/

 if ( ( pixels < 0 ) || ( pixels > 100000 ) ||
      ( fields < 0 ) || ( fields > 100000 ) )
   {
   error_flag = -1 ;
   goto bailout ;
   } 

 /** Allocate space for time, lat and lon fields **/

 data->itime = ( long * )  malloc ( pixels * sizeof ( long ) ) ; 
 data->lat   = ( float * ) malloc ( pixels * sizeof ( float ) ) ; 
 data->lng   = ( float * ) malloc ( pixels * sizeof ( float ) ) ; 
 if ( data->itime == NULL || data->lat == NULL || data->lng == NULL ) 
   {
   error_flag = -2 ; 
   goto bailout ;
   }

 /** Allocate pointers to data fields **/

 data->fielddata = ( float ** ) malloc ( fields * sizeof ( float * ) ) ; 
 if ( data->fielddata == NULL )
   {
   error_flag = -2 ; 
   goto bailout ;
   }

 for ( i = 0 ; i < fields ; i++ )
   {
   data->fielddata[i] = ( float * ) malloc ( pixels * sizeof ( float ) ) ;
   if ( data->fielddata[i] == NULL ) 
     {
     error_flag = -2 ; 
     goto bailout ;
     }
   }

 bailout :
 return ( error_flag ) ;

 }