/*
 * Copyright 2005-2017 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"
#include <math.h>
/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_data_complex_packing
   IMPLEMENTS = pack_double
   IMPLEMENTS = init
   MEMBERS= const char*  N
   MEMBERS=const char*  half_byte
   MEMBERS=const char*  packingType
   MEMBERS=const char*  ieee_packing
   MEMBERS=const char*  precision
   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 void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_data_g1complex_packing {
    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;
	const char*  optimize_scaling_factor;
/* Members defined in data_complex_packing */
	const char*  GRIBEX_sh_bug_present;
	const char*  ieee_floats;
	const char*  laplacianOperatorIsSet;
	const char*  laplacianOperator;
	const char*  sub_j;
	const char*  sub_k;
	const char*  sub_m;
	const char*  pen_j;
	const char*  pen_k;
	const char*  pen_m;
/* Members defined in data_g1complex_packing */
	const char*  N;
	const char*  half_byte;
	const char*  packingType;
	const char*  ieee_packing;
	const char*  precision;
} grib_accessor_data_g1complex_packing;

extern grib_accessor_class* grib_accessor_class_data_complex_packing;

static grib_accessor_class _grib_accessor_class_data_g1complex_packing = {
    &grib_accessor_class_data_complex_packing,                      /* super                     */
    "data_g1complex_packing",                      /* name                      */
    sizeof(grib_accessor_data_g1complex_packing),  /* 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      */
    0,                /* 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    */
    0,              /* 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_g1complex_packing = &_grib_accessor_class_data_g1complex_packing;


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->value_count	=	(*(c->super))->value_count;
	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->unpack_double	=	(*(c->super))->unpack_double;
	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_g1complex_packing *self =(grib_accessor_data_g1complex_packing*)a;
  self->half_byte    = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  self->N            = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  self->packingType  = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  self->ieee_packing = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  self->precision = grib_arguments_get_name(grib_handle_of_accessor(a),args,self->carg++);
  self->edition=1;
  a->flags |= GRIB_ACCESSOR_FLAG_DATA;
  }


static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
  grib_accessor_data_g1complex_packing* self =
      (grib_accessor_data_g1complex_packing*)a;
  int ret = GRIB_SUCCESS;
  long seclen=0;
  long   sub_j= 0;
  long   sub_k= 0;
  long   sub_m= 0;
  long   n= 0;
  long   half_byte= 0;
  long  bits_per_value =0;
  size_t  buflen =0;
  grib_context* c=a->context;
  grib_handle* h=grib_handle_of_accessor(a);
  char* ieee_packing_s=NULL;
  char* packingType_s=NULL;
  char* precision_s=NULL;

  grib_accessor_class* super = *(a->cclass->super);


  if (*len ==0) return GRIB_NO_VALUES;

  if (c->ieee_packing && self->ieee_packing) {
    long precision=c->ieee_packing==32 ? 1 : 2;
    size_t lenstr=strlen(self->ieee_packing);
    
    packingType_s=grib_context_strdup(c,self->packingType);
    ieee_packing_s=grib_context_strdup(c,self->ieee_packing);
    precision_s=grib_context_strdup(c,self->precision);
    
    grib_set_string(h,packingType_s,ieee_packing_s,&lenstr);
    grib_set_long(h,precision_s,precision);
    
    grib_context_free(c,packingType_s);
    grib_context_free(c,ieee_packing_s);
    grib_context_free(c,precision_s);
    return grib_set_double_array(h,"values",val,*len);
  }

  if((ret = grib_get_long_internal(grib_handle_of_accessor(a),self->sub_j,&sub_j)) != GRIB_SUCCESS)
    return ret;
  if((ret = grib_get_long_internal(grib_handle_of_accessor(a),self->sub_k,&sub_k)) != GRIB_SUCCESS)
    return ret;
  if((ret = grib_get_long_internal(grib_handle_of_accessor(a),self->sub_m,&sub_m)) != GRIB_SUCCESS)
    return ret;

  self->dirty=1;

  Assert ((sub_j== sub_k) && (sub_m== sub_j));

  ret = super->pack_double(a,val,len);

  if(ret == GRIB_SUCCESS){
        n = a->offset + 4*((sub_k+1)*(sub_k+2));
#if 1
     /*     Octet number starts from beginning of message but shouldn't     */
    if((ret = grib_set_long_internal(grib_handle_of_accessor(a),self->N,n)) != GRIB_SUCCESS)
      return ret;
#else
    ret = grib_get_long_internal(grib_handle_of_accessor(a),self->offsetsection,&offsetsection);
    if(ret != GRIB_SUCCESS) return ret;
    if((ret = grib_set_long_internal(grib_handle_of_accessor(a),self->N,n-offsetsection))
        != GRIB_SUCCESS) return ret;
#endif
    ret = grib_get_long_internal(grib_handle_of_accessor(a),self->bits_per_value,&bits_per_value);
    if(ret != GRIB_SUCCESS) return ret;

    ret = grib_get_long_internal(grib_handle_of_accessor(a),self->seclen,&seclen);
    if(ret != GRIB_SUCCESS) return ret;

    buflen = 32*(sub_k+1)*(sub_k+2)+(*len-(sub_k+1)*(sub_k+2))*bits_per_value+18*8;
    half_byte = seclen*8-buflen;
	if (a->context->debug==-1) {
		printf("ECCODES DEBUG: half_byte=%ld\n",half_byte);
	}

    ret = grib_set_long_internal(grib_handle_of_accessor(a),self->half_byte, half_byte);
    if(ret != GRIB_SUCCESS) return ret;
  }
  return ret;
}

