text: /*
   * (C) Copyright 2005- 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_long
     IMPLEMENTS = unpack_long; pack_long
     IMPLEMENTS = init
     MEMBERS = const char* values
     MEMBERS = const char* bits_per_value
     MEMBERS = const char* changing_precision
     MEMBERS = const char* decimal_scale_factor
     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_long(grib_accessor*, const long* val, size_t* len);
  static int unpack_long(grib_accessor*, long* val, size_t* len);
  static void init(grib_accessor*, const long, grib_arguments*);
  static void init_class(grib_accessor_class*);
  
  typedef struct grib_accessor_decimal_precision
  {
      grib_accessor att;
      /* Members defined in gen */
      /* Members defined in long */
      /* Members defined in decimal_precision */
      const char* values;
      const char* bits_per_value;
      const char* changing_precision;
      const char* decimal_scale_factor;
  } grib_accessor_decimal_precision;
  
  extern grib_accessor_class* grib_accessor_class_long;
  
  static grib_accessor_class _grib_accessor_class_decimal_precision = {
      &grib_accessor_class_long,               /* super                     */
      "decimal_precision",                     /* name                      */
      sizeof(grib_accessor_decimal_precision), /* 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      */
      &pack_long,                              /* grib_pack procedures long      */
      &unpack_long,                            /* grib_unpack procedures long    */
      0,                                       /* 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_decimal_precision = &_grib_accessor_class_decimal_precision;
  
  
  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_double            = (*(c->super))->pack_double;
      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 l, grib_arguments* args)
  {
      int n                                 = 0;
      grib_accessor_decimal_precision* self = (grib_accessor_decimal_precision*)a;
  
      self->bits_per_value       = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
      self->decimal_scale_factor = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
      self->changing_precision   = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
      self->values               = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
  
      a->flags |= GRIB_ACCESSOR_FLAG_FUNCTION;
      a->length = 0;
  }
  
  static int unpack_long(grib_accessor* a, long* val, size_t* len)
  {
      int ret                               = 0;
      grib_accessor_decimal_precision* self = (grib_accessor_decimal_precision*)a;
      grib_handle* h                        = grib_handle_of_accessor(a);
  
      if ((ret = grib_get_long_internal(h, self->decimal_scale_factor, val)) != GRIB_SUCCESS)
          return ret;
  
      *len = 1;
      return ret;
  }
  
  static int pack_long(grib_accessor* a, const long* val, size_t* len)
  {
      long bitsPerValue                     = 0;
      double* values                        = NULL;
      size_t size                           = 0;
      int ret                               = 0;
      grib_accessor_decimal_precision* self = (grib_accessor_decimal_precision*)a;
      grib_context* c                       = a->context;
      grib_handle* h                        = grib_handle_of_accessor(a);
  
      if (!self->values) {
          if ((ret = grib_set_long_internal(h, self->bits_per_value, 0)) != GRIB_SUCCESS)
              return ret;
  
          if ((ret = grib_set_long_internal(h, self->decimal_scale_factor, *val)) != GRIB_SUCCESS)
              return ret;
  
          if ((ret = grib_set_long_internal(h, self->changing_precision, 1)) != GRIB_SUCCESS) {
              grib_context_free(c, values);
              return ret;
          }
  
          return GRIB_SUCCESS;
      }
  
      if ((ret = grib_get_size(h, self->values, &size)) != GRIB_SUCCESS)
          return ret;
  
      values = (double*)grib_context_malloc(c, size * sizeof(double));
      if (!values)
          return GRIB_OUT_OF_MEMORY;
  
      if ((ret = grib_get_double_array_internal(h, self->values, values, &size)) != GRIB_SUCCESS) {
          grib_context_buffer_free(c, values);
          return ret;
      }
  
      if ((ret = grib_set_long_internal(h, self->decimal_scale_factor, *val)) != GRIB_SUCCESS) {
          grib_context_buffer_free(c, values);
          return ret;
      }
  
      if ((ret = grib_set_long_internal(h, self->bits_per_value, bitsPerValue)) != GRIB_SUCCESS) {
          grib_context_free(c, values);
          return ret;
      }
  
      if ((ret = grib_set_long_internal(h, self->changing_precision, 1)) != GRIB_SUCCESS) {
          grib_context_free(c, values);
          return ret;
      }
  
      if ((ret = grib_set_double_array_internal(h, self->values, values, size)) != GRIB_SUCCESS) {
          grib_context_buffer_free(c, values);
          return ret;
      }
  
      grib_context_free(c, values);
  
      return GRIB_SUCCESS;
  }
  