/*
 * 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.
 */

/************************************************
 *  Enrico Fucile
 ***********************************************/

#include "grib_api_internal.h"
/*
   This is used by make_class.pl

   START_CLASS_DEF
   CLASS      = accessor
   SUPER      = grib_accessor_class_gen
   IMPLEMENTS = get_native_type;unpack_string
   IMPLEMENTS = pack_missing;
   IMPLEMENTS = dump
   IMPLEMENTS = compare
   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  get_native_type(grib_accessor*);
static int pack_missing(grib_accessor*);
static int unpack_string (grib_accessor*, char*, size_t *len);
static void dump(grib_accessor*, grib_dumper*);
static void init_class(grib_accessor_class*);
static int compare(grib_accessor*, grib_accessor*);

typedef struct grib_accessor_double {
    grib_accessor          att;
/* Members defined in gen */
/* Members defined in double */
} grib_accessor_double;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_double = {
    &grib_accessor_class_gen,                      /* super                     */
    "double",                      /* name                      */
    sizeof(grib_accessor_double),  /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    0,                       /* init                      */
    0,                  /* post_init                      */
    0,                    /* free mem                       */
    &dump,                       /* 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           */
    &get_native_type,            /* get native type               */
    0,                /* get sub_section                */
    &pack_missing,               /* grib_pack procedures long      */
    0,                 /* grib_pack procedures long      */
    0,                  /* grib_pack procedures long      */
    0,                /* grib_unpack procedures long    */
    0,                /* grib_pack procedures double    */
    0,              /* grib_unpack procedures double  */
    0,                /* grib_pack procedures string    */
    &unpack_string,              /* 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    */
    &compare,                    /* compare vs. another accessor   */
    0,     /* unpack only ith value          */
    0,     /* unpack a subarray         */
    0,              		/* clear          */
    0,               		/* clone accessor          */
};


grib_accessor_class* grib_accessor_class_double = &_grib_accessor_class_double;


static void init_class(grib_accessor_class* c)
{
	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->sub_section	=	(*(c->super))->sub_section;
	c->is_missing	=	(*(c->super))->is_missing;
	c->pack_long	=	(*(c->super))->pack_long;
	c->unpack_long	=	(*(c->super))->unpack_long;
	c->pack_double	=	(*(c->super))->pack_double;
	c->unpack_double	=	(*(c->super))->unpack_double;
	c->pack_string	=	(*(c->super))->pack_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->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 int  get_native_type(grib_accessor* a){
  return GRIB_TYPE_DOUBLE;
}


static int unpack_string(grib_accessor*a , char*  v, size_t *len){

  double val = 0;
  size_t l = 1;
  char repres[1024];

  grib_unpack_double (a , &val, &l);

    if ((val == GRIB_MISSING_DOUBLE) && ((a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING) != 0) )
    sprintf(repres,"MISSING");
    else
    sprintf(repres,"%g", val);

  l = strlen(repres)+1;

  if(l >*len ){
    grib_context_log(a->context, GRIB_LOG_ERROR, "grib_accessor_long : unpack_string : Buffer too small for %s ", a->name );

    *len = l;
    return GRIB_BUFFER_TOO_SMALL;
  }
  grib_context_log(a->context,GRIB_LOG_DEBUG, "grib_accessor_long: Casting double %s to string  ", a->name);

  *len = l;

  strcpy(v,repres);
  return GRIB_SUCCESS;


}
static void dump(grib_accessor* a, grib_dumper* dumper)
{
  grib_dump_values(dumper,a);
}

static int compare(grib_accessor* a, grib_accessor* b) {
  int retval=0;
  double *aval=0;
  double *bval=0;

  size_t alen = 0;
  size_t blen = 0;
  long count = 0;
  int err=0;

  err=grib_value_count(a,&count);
  if (err) return err;
  alen=count;

  err=grib_value_count(b,&count);
  if (err) return err;
  blen=count;

  if (alen != blen) return GRIB_COUNT_MISMATCH;

  aval=(double*)grib_context_malloc(a->context,alen*sizeof(double));
  bval=(double*)grib_context_malloc(b->context,blen*sizeof(double));

  grib_unpack_double(a,aval,&alen);
  grib_unpack_double(b,bval,&blen);

  retval = GRIB_SUCCESS;
  while (alen != 0) {
    if (*bval != *aval) retval = GRIB_DOUBLE_VALUE_MISMATCH;
    alen--;
  }

  grib_context_free(a->context,aval);
  grib_context_free(b->context,bval);

  return retval;

}

static int pack_missing(grib_accessor* a){

  size_t one = 1;
  double value = GRIB_MISSING_DOUBLE;

  if(a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING)
    return grib_pack_double(a,&value,&one);
  return GRIB_VALUE_CANNOT_BE_MISSING;
}

/*
static int is_missing(grib_accessor* a){

  size_t one = 1;
  double value = GRIB_MISSING_DOUBLE;

  if(a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING)
  {
    int e=grib_unpack_double(a,&value,&one);
    Assert(e == 0);
    return value == GRIB_MISSING_DOUBLE;
  }
  return 0;
}
*/
