text: /*
   * Copyright 2005-2016 ECMWF.
   *
   * This software is licensed under the terms of the Apache Licence Version 2.0
   * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
   *
   * In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
   * virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
   */
  
  #include "grib_api_internal.h"
  
  /*
     This is used by make_class.pl
  
     START_CLASS_DEF
     CLASS      = accessor
     SUPER      = grib_accessor_class_data_g1simple_packing
     IMPLEMENTS = init
     IMPLEMENTS = unpack_double 
     IMPLEMENTS = value_count 
     IMPLEMENTS = pack_double
     MEMBERS=const char*  missing_value
     MEMBERS=const char*  numberOfPoints
     MEMBERS=const char*  bitmap
     END_CLASS_DEF
  
   */
  
  /* START_CLASS_IMP */
  
  /*
  
  Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
  Instead edit values between START_CLASS_DEF and END_CLASS_DEF
  or edit "accessor.class" and rerun ./make_class.pl
  
  */
  
  static int pack_double(grib_accessor*, const double* val,size_t *len);
  static int unpack_double(grib_accessor*, double* val,size_t *len);
  static int value_count(grib_accessor*,long*);
  static void init(grib_accessor*,const long, grib_arguments* );
  static void init_class(grib_accessor_class*);
  
  typedef struct grib_accessor_data_dummy_field {
      grib_accessor          att;
  /* Members defined in gen */
  /* Members defined in values */
  	int  carg;
  	const char* seclen;
  	const char* offsetdata;
  	const char* offsetsection;
  	int dirty;
  /* Members defined in data_simple_packing */
  	int edition;
  	const char*  units_factor;
  	const char*  units_bias;
  	const char*  changing_precision;
  	const char*  number_of_values;
  	const char*  bits_per_value;
  	const char*  reference_value;
  	const char*  binary_scale_factor;
  	const char*  decimal_scale_factor;
  /* Members defined in data_g1simple_packing */
  	const char*  half_byte;
  	const char*  packingType;
  	const char*  ieee_packing;
  	const char*  precision;
  /* Members defined in data_dummy_field */
  	const char*  missing_value;
  	const char*  numberOfPoints;
  	const char*  bitmap;
  } grib_accessor_data_dummy_field;
  
  extern grib_accessor_class* grib_accessor_class_data_g1simple_packing;
  
  static grib_accessor_class _grib_accessor_class_data_dummy_field = {
      &grib_accessor_class_data_g1simple_packing,                      /* super                     */
      "data_dummy_field",                      /* name                      */
      sizeof(grib_accessor_data_dummy_field),  /* size                      */
      0,                           /* inited */
      &init_class,                 /* init_class */
      &init,                       /* init                      */
      0,                  /* post_init                      */
      0,                    /* free mem                       */
      0,                       /* describes himself         */
      0,                /* get length of section     */
      0,              /* get length of string      */
      &value_count,                /* get number of values      */
      0,                 /* get number of bytes      */
      0,                /* get offset to bytes           */
      0,            /* get native type               */
      0,                /* get sub_section                */
      0,               /* grib_pack procedures long      */
      0,                 /* grib_pack procedures long      */
      0,                  /* grib_pack procedures long      */
      0,                /* grib_unpack procedures long    */
      &pack_double,                /* grib_pack procedures double    */
      &unpack_double,              /* grib_unpack procedures double  */
      0,                /* grib_pack procedures string    */
      0,              /* grib_unpack procedures string  */
      0,          /* grib_pack array procedures string    */
      0,        /* grib_unpack array procedures string  */
      0,                 /* grib_pack procedures bytes     */
      0,               /* grib_unpack procedures bytes   */
      0,            /* pack_expression */
      0,              /* notify_change   */
      0,                /* update_size   */
      0,            /* preferred_size   */
      0,                    /* resize   */
      0,      /* nearest_smaller_value */
      0,                       /* next accessor    */
      0,                    /* compare vs. another accessor   */
      0,     /* unpack only ith value          */
      0,     /* unpack a subarray         */
      0,              		/* clear          */
      0,               		/* clone accessor          */
  };
  
  
  grib_accessor_class* grib_accessor_class_data_dummy_field = &_grib_accessor_class_data_dummy_field;
  
  
  static void init_class(grib_accessor_class* c)
  {
  	c->dump	=	(*(c->super))->dump;
  	c->next_offset	=	(*(c->super))->next_offset;
  	c->string_length	=	(*(c->super))->string_length;
  	c->byte_count	=	(*(c->super))->byte_count;
  	c->byte_offset	=	(*(c->super))->byte_offset;
  	c->get_native_type	=	(*(c->super))->get_native_type;
  	c->sub_section	=	(*(c->super))->sub_section;
  	c->pack_missing	=	(*(c->super))->pack_missing;
  	c->is_missing	=	(*(c->super))->is_missing;
  	c->pack_long	=	(*(c->super))->pack_long;
  	c->unpack_long	=	(*(c->super))->unpack_long;
  	c->pack_string	=	(*(c->super))->pack_string;
  	c->unpack_string	=	(*(c->super))->unpack_string;
  	c->pack_string_array	=	(*(c->super))->pack_string_array;
  	c->unpack_string_array	=	(*(c->super))->unpack_string_array;
  	c->pack_bytes	=	(*(c->super))->pack_bytes;
  	c->unpack_bytes	=	(*(c->super))->unpack_bytes;
  	c->pack_expression	=	(*(c->super))->pack_expression;
  	c->notify_change	=	(*(c->super))->notify_change;
  	c->update_size	=	(*(c->super))->update_size;
  	c->preferred_size	=	(*(c->super))->preferred_size;
  	c->resize	=	(*(c->super))->resize;
  	c->nearest_smaller_value	=	(*(c->super))->nearest_smaller_value;
  	c->next	=	(*(c->super))->next;
  	c->compare	=	(*(c->super))->compare;
  	c->unpack_double_element	=	(*(c->super))->unpack_double_element;
  	c->unpack_double_subarray	=	(*(c->super))->unpack_double_subarray;
  	c->clear	=	(*(c->super))->clear;
  	c->make_clone	=	(*(c->super))->make_clone;
  }
  
  /* END_CLASS_IMP */
  
  static void init(grib_accessor* a,const long v, grib_arguments* args)
  {
      grib_accessor_data_dummy_field* self =  (grib_accessor_data_dummy_field*)a;
      self->missing_value = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
      self->numberOfPoints = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
      self->bitmap = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  }
  
  static int  unpack_double(grib_accessor* a, double* val, size_t *len)
  {
      grib_accessor_data_dummy_field* self =  (grib_accessor_data_dummy_field*)a;
      size_t i = 0;
      size_t n_vals = 0;
      long numberOfPoints;
      double missing_value = 0;
      int err = 0;
  
      if((err = grib_get_long_internal(grib_handle_of_accessor(a),self->numberOfPoints, &numberOfPoints))
              != GRIB_SUCCESS)  return err;
      n_vals =numberOfPoints;
  
      if((err = grib_get_double_internal(grib_handle_of_accessor(a),self->missing_value, &missing_value))
              != GRIB_SUCCESS)		return err;
  
      if(*len < n_vals){
          *len = n_vals;
          return GRIB_ARRAY_TOO_SMALL;
      }
  
      for(i=0;i < n_vals;i++)
          val[i] = missing_value;
  
      if(grib_find_accessor(grib_handle_of_accessor(a),self->bitmap)) {
          if((err = grib_set_double_array_internal(grib_handle_of_accessor(a),self->bitmap,val,n_vals)) != GRIB_SUCCESS)
              return err;
      }
  
      *len = (long) n_vals;
      return err;
  }
  
  static int pack_double(grib_accessor* a, const double* val, size_t *len)
  {
      grib_accessor_data_dummy_field* self =  (grib_accessor_data_dummy_field*)a;
  
  
      size_t n_vals = *len;
      int err = 0;
  
      long   bits_per_value = 0;
  
      long   half_byte = 0;
  
      size_t buflen = 0;
      unsigned char*  buf = NULL;
  
      if (*len ==0) return GRIB_NO_VALUES;
  
      if((err = grib_get_long_internal(grib_handle_of_accessor(a),self->bits_per_value,&bits_per_value)) != GRIB_SUCCESS)
          return err;
  
      buflen = (1+((bits_per_value*n_vals)/8))*sizeof(unsigned char);
  
      buf = (unsigned char*)grib_context_malloc_clear(a->context,buflen);
      if (!buf) return GRIB_OUT_OF_MEMORY;
  
      half_byte = (buflen*8)-((*len)*bits_per_value);
  
      if((err = grib_set_long_internal(grib_handle_of_accessor(a),self->half_byte, half_byte)) != GRIB_SUCCESS){
          grib_context_free(a->context,buf);
          return err;
      }
      grib_buffer_replace(a, buf, buflen,1,1);
  
      grib_context_free(a->context,buf);
  
      return GRIB_SUCCESS;
  
  }
  
  static int value_count(grib_accessor* a,long* numberOfPoints)
  {
      grib_accessor_data_dummy_field* self =  (grib_accessor_data_dummy_field*)a;
      int err=0;
      *numberOfPoints = 0;
  
      if((err = grib_get_long_internal(grib_handle_of_accessor(a),self->numberOfPoints, numberOfPoints))
              != GRIB_SUCCESS) {
          grib_context_log(a->context,GRIB_LOG_ERROR,"unable to get count of %s (%s)",a->name,grib_get_error_message(err));
      }
  
      return err;
  }
  