text: /*
   * Copyright 2005-2019 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_double
     IMPLEMENTS = unpack_double;pack_double;is_missing
     IMPLEMENTS = init
     MEMBERS=const char*                  directionIncrementGiven
     MEMBERS=const char*                  directionIncrement
     MEMBERS=const char*                  scansPositively
     MEMBERS=const char*                  first
     MEMBERS=const char*                  last
     MEMBERS=const char*                  numberOfPoints
     MEMBERS=const char*                  angleMultiplier
     MEMBERS=const char*                  angleDivisor
     MEMBERS=long                   isLongitude
     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 is_missing(grib_accessor*);
  static int pack_double(grib_accessor*, const double* val,size_t *len);
  static int unpack_double(grib_accessor*, 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_latlon_increment {
      grib_accessor          att;
  /* Members defined in gen */
  /* Members defined in double */
  /* Members defined in latlon_increment */
  	const char*                  directionIncrementGiven;
  	const char*                  directionIncrement;
  	const char*                  scansPositively;
  	const char*                  first;
  	const char*                  last;
  	const char*                  numberOfPoints;
  	const char*                  angleMultiplier;
  	const char*                  angleDivisor;
  	long                   isLongitude;
  } grib_accessor_latlon_increment;
  
  extern grib_accessor_class* grib_accessor_class_double;
  
  static grib_accessor_class _grib_accessor_class_latlon_increment = {
      &grib_accessor_class_double,                      /* super                     */
      "latlon_increment",                      /* name                      */
      sizeof(grib_accessor_latlon_increment),  /* 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      */
      &is_missing,                 /* 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_latlon_increment = &_grib_accessor_class_latlon_increment;
  
  
  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->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 l, grib_arguments* c)
  {
      grib_accessor_latlon_increment* self = (grib_accessor_latlon_increment*)a;
      int n = 0;
  
      self->directionIncrementGiven = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->directionIncrement    = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->scansPositively    = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->first = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->last    = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->numberOfPoints    = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->angleMultiplier    = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->angleDivisor   = grib_arguments_get_name(grib_handle_of_accessor(a),c,n++);
      self->isLongitude=grib_arguments_get_long(grib_handle_of_accessor(a), c,n++);
  }
  
  static int    unpack_double   (grib_accessor* a, double* val, size_t *len)
  {
      grib_accessor_latlon_increment* self = (grib_accessor_latlon_increment*)a;
      int ret = 0;
  
      long directionIncrementGiven=0;
      long directionIncrement=0;
      long angleDivisor=1;
      long angleMultiplier=1;
      double first = 0;
      double last = 0;
      long numberOfPoints = 0;
      long scansPositively = 0;
  
      if(*len < 1) return GRIB_ARRAY_TOO_SMALL;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->directionIncrementGiven,&directionIncrementGiven)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->scansPositively,&scansPositively)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->directionIncrement,&directionIncrement)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_double_internal(grib_handle_of_accessor(a), self->first,&first)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_double_internal(grib_handle_of_accessor(a), self->last,&last)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->numberOfPoints,&numberOfPoints)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->angleMultiplier,&angleMultiplier)) != GRIB_SUCCESS)
          return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->angleDivisor,&angleDivisor)) != GRIB_SUCCESS)
          return ret;
  
      if (self->isLongitude) {
          if (last < first && scansPositively) last+=360;
          /*if (last > first && !scansPositively) first-=360;*/
      }
  
      if (!directionIncrementGiven && numberOfPoints != GRIB_MISSING_LONG)
      {
          if (numberOfPoints<2) {
              /* We cannot compute the increment if we don't have enough points! */
              grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
                      "Cannot compute lat/lon increments. Not enough points!");
              return GRIB_GEOCALCULUS_PROBLEM;
          }
          if (!scansPositively) { /* scans negatively */
              if (first > last){
                  *val=(first-last)/(numberOfPoints-1);
              }
              else {
                  *val=(first+360.0-last)/(numberOfPoints-1);
              }
          }
          else
          {
              /* scans positively */
              if (last > first){
                  *val=(last-first)/(numberOfPoints-1);
              }
              else {
                  *val=(last+360.0-first)/(numberOfPoints-1);
              }
          }
      }
      else if (numberOfPoints == GRIB_MISSING_LONG)
      {
          *val = GRIB_MISSING_DOUBLE;
      }
      else
      {
          Assert(angleDivisor!=0);
          *val = (double)directionIncrement/angleDivisor*angleMultiplier;
      }
  
  #if 0
      printf("unpack -- %s=%ld %s=%ld %s=%f %s=%f %s=%ld %s=%f\n",
              self->directionIncrementGiven,directionIncrementGiven,
              self->directionIncrement,directionIncrement,
              self->last,last,
              self->first,first,
              self->numberOfPoints,numberOfPoints,
              a->name,*val);
  #endif
      if (ret == GRIB_SUCCESS) *len = 1;
  
      return ret;
  }
  
  static int pack_double(grib_accessor* a, const double* val, size_t *len)
  {
      grib_accessor_latlon_increment* self = (grib_accessor_latlon_increment*)a;
      int ret = 0;
      long codedNumberOfPoints=0;
  
      long directionIncrementGiven=0;
      long directionIncrement=0;
      long angleDivisor=1;
      long angleMultiplier=1;
      double first = 0;
      double last = 0;
      long numberOfPoints = 0;
      /* long numberOfPointsInternal = 0; */
      long scansPositively = 0;
      double directionIncrementDouble=0;
  
      ret = grib_get_double_internal(grib_handle_of_accessor(a), self->first,&first);
      if(ret != GRIB_SUCCESS) return ret;
  
      ret = grib_get_double_internal(grib_handle_of_accessor(a), self->last,&last);
      if(ret != GRIB_SUCCESS) return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->directionIncrementGiven,&directionIncrementGiven))
              != GRIB_SUCCESS) return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->numberOfPoints,&numberOfPoints)) != GRIB_SUCCESS) return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->scansPositively,&scansPositively))
              != GRIB_SUCCESS) return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->angleMultiplier,&angleMultiplier)) != GRIB_SUCCESS) return ret;
  
      if((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->angleDivisor,&angleDivisor)) != GRIB_SUCCESS) return ret;
  
      if (self->isLongitude) {
          if (last < first && scansPositively) last+=360;
          if (last > first && !scansPositively) first-=360;
      }
  
      if (*val == GRIB_MISSING_DOUBLE) {
          directionIncrement=GRIB_MISSING_LONG;
          directionIncrementGiven=1;
          numberOfPoints=GRIB_MISSING_LONG;
      } else {
          /* numberOfPointsInternal = 1+rint(fabs((last-first) / *val)); */
  
          directionIncrementDouble = rint (*val * (double)angleDivisor / (double)angleMultiplier);
  
          directionIncrement=(long)directionIncrementDouble;
          if (directionIncrement == 0 ) {
              directionIncrement=GRIB_MISSING_LONG;
              directionIncrementGiven=0;
          }
      }
  
      /*ret = grib_set_long_internal(grib_handle_of_accessor(a), self->numberOfPoints,numberOfPoints);
    if(ret )
       grib_context_log(a->context, GRIB_LOG_ERROR, "Accessor %s cannot pack value for %s error %d \n", a->name, self->numberOfPoints, ret);
       */
  
      grib_get_long_internal(grib_handle_of_accessor(a), self->numberOfPoints,&codedNumberOfPoints);
  
      ret = grib_set_long_internal(grib_handle_of_accessor(a), self->directionIncrement,directionIncrement);
      if(ret ) return ret;
  
      ret = grib_set_long_internal(grib_handle_of_accessor(a), self->directionIncrementGiven,directionIncrementGiven);
      if(ret )return ret;
  
  #if 0
      printf("pack -- %s=%ld %s=%ld \n ------- %s=%f %s=%f \n ------- %s=%ld codedNumberOfPoints=%ld %s=%f\n",
              self->directionIncrementGiven,directionIncrementGiven,
              self->directionIncrement,directionIncrement,
              self->last,last,
              self->first,first,
              self->numberOfPoints,numberOfPoints,
              codedNumberOfPoints,
              a->name,*val);
  #endif
      if (ret == GRIB_SUCCESS) *len = 1;
  
      return ret;
  }
  
  static int is_missing(grib_accessor* a){
  
      size_t len=1;
      double val=0;
  
      unpack_double(a, &val, &len);
  
      return (val == GRIB_MISSING_DOUBLE);
  }
  