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.
   */
  
  #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;dump
     IMPLEMENTS = next_offset
     IMPLEMENTS = byte_count
     IMPLEMENTS = value_count
     IMPLEMENTS = byte_offset
     IMPLEMENTS = update_size
     MEMBERS    = const char* numberOfBits
     MEMBERS    = const char* numberOfElements
  
     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 long byte_count(grib_accessor*);
  static long byte_offset(grib_accessor*);
  static long next_offset(grib_accessor*);
  static int value_count(grib_accessor*, long*);
  static void dump(grib_accessor*, grib_dumper*);
  static void init(grib_accessor*, const long, grib_arguments*);
  static void init_class(grib_accessor_class*);
  static void update_size(grib_accessor*, size_t);
  
  typedef struct grib_accessor_spd
  {
      grib_accessor att;
      /* Members defined in gen */
      /* Members defined in long */
      /* Members defined in spd */
      const char* numberOfBits;
      const char* numberOfElements;
  } grib_accessor_spd;
  
  extern grib_accessor_class* grib_accessor_class_long;
  
  static grib_accessor_class _grib_accessor_class_spd = {
      &grib_accessor_class_long, /* super                     */
      "spd",                     /* name                      */
      sizeof(grib_accessor_spd), /* size                      */
      0,                         /* inited */
      &init_class,               /* init_class */
      &init,                     /* init                      */
      0,                         /* post_init                      */
      0,                         /* free mem                       */
      &dump,                     /* describes himself         */
      &next_offset,              /* get length of section     */
      0,                         /* get length of string      */
      &value_count,              /* get number of values      */
      &byte_count,               /* get number of bytes      */
      &byte_offset,              /* 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   */
      &update_size,              /* 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_spd = &_grib_accessor_class_spd;
  
  
  static void init_class(grib_accessor_class* c)
  {
      c->string_length          = (*(c->super))->string_length;
      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->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 long byte_count(grib_accessor* a)
  {
      return a->length;
  }
  
  static long compute_byte_count(grib_accessor* a)
  {
      grib_accessor_spd* self = (grib_accessor_spd*)a;
      long numberOfBits;
      long numberOfElements;
      int ret = 0;
  
      ret = grib_get_long(grib_handle_of_accessor(a), self->numberOfBits, &numberOfBits);
      if (ret) {
          grib_context_log(a->context, GRIB_LOG_ERROR,
                           "%s unable to get %s to compute size", a->name, self->numberOfBits);
          return 0;
      }
  
      ret = grib_get_long(grib_handle_of_accessor(a), self->numberOfElements, &numberOfElements);
      if (ret) {
          grib_context_log(a->context, GRIB_LOG_ERROR,
                           "%s unable to get %s to compute size", a->name, self->numberOfElements);
          return 0;
      }
      numberOfElements++;
  
      return (numberOfBits * numberOfElements + 7) / 8;
  }
  
  static void init(grib_accessor* a, const long len, grib_arguments* args)
  {
      grib_accessor_spd* self = (grib_accessor_spd*)a;
      int n                   = 0;
      self->numberOfBits      = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
      self->numberOfElements  = grib_arguments_get_name(grib_handle_of_accessor(a), args, n++);
      a->length               = compute_byte_count(a);
  }
  
  static void dump(grib_accessor* a, grib_dumper* dumper)
  {
      grib_dump_long(dumper, a, NULL);
  }
  
  static int unpack_long(grib_accessor* a, long* val, size_t* len)
  {
      grib_accessor_spd* self = (grib_accessor_spd*)a;
      int i;
      int ret           = 0;
      long pos          = a->offset * 8;
      long rlen         = 0;
      long numberOfBits = 0;
  
      ret = value_count(a, &rlen);
      if (ret)
          return ret;
  
      if (*len < rlen) {
          grib_context_log(a->context, GRIB_LOG_ERROR,
                           " wrong size (%ld) for %s it contains %d values ", *len, a->name, rlen);
          *len = 0;
          return GRIB_ARRAY_TOO_SMALL;
      }
  
      ret = grib_get_long(grib_handle_of_accessor(a), self->numberOfBits, &numberOfBits);
      if (ret)
          return ret;
      if (numberOfBits > 64) {
          grib_context_log(a->context, GRIB_LOG_ERROR,"Invalid number of bits: %ld",numberOfBits);
          return GRIB_DECODING_ERROR;
      }
  
      for (i = 0; i < rlen - 1; i++)
          val[i] = grib_decode_unsigned_long(grib_handle_of_accessor(a)->buffer->data, &pos, numberOfBits);
  
      val[rlen - 1] = grib_decode_signed_longb(grib_handle_of_accessor(a)->buffer->data, &pos, numberOfBits);
  
      *len = rlen;
  
      return GRIB_SUCCESS;
  }
  
  static int pack_long(grib_accessor* a, const long* val, size_t* len)
  {
      grib_accessor_spd* self = (grib_accessor_spd*)a;
      int ret                 = 0;
      long off                = 0;
      long numberOfBits       = 0;
      size_t buflen           = 0;
      unsigned char* buf      = NULL;
      unsigned long i         = 0;
      long rlen               = 0;
  
      ret = value_count(a, &rlen);
      if (ret)
          return ret;
  
      if (*len != rlen) {
          ret = grib_set_long(grib_handle_of_accessor(a), self->numberOfElements, (*len) - 1);
          if (ret) return ret;
      }
  
      ret = grib_get_long(grib_handle_of_accessor(a), self->numberOfBits, &numberOfBits);
      if (ret)
          return ret;
  
      buflen = compute_byte_count(a);
      buf    = (unsigned char*)grib_context_malloc_clear(a->context, buflen);
  
      for (i = 0; i < rlen - 1; i++) {
          grib_encode_unsigned_longb(buf, val[i], &off, numberOfBits);
      }
  
      grib_encode_signed_longb(buf, val[rlen - 1], &off, numberOfBits);
  
      grib_buffer_replace(a, buf, buflen, 1, 1);
  
      grib_context_free(a->context, buf);
  
      *len = rlen;
      return ret;
  }
  
  static int value_count(grib_accessor* a, long* numberOfElements)
  {
      grib_accessor_spd* self = (grib_accessor_spd*)a;
      int ret;
      *numberOfElements = 0;
  
      ret = grib_get_long(grib_handle_of_accessor(a), self->numberOfElements, numberOfElements);
      if (ret) {
          grib_context_log(a->context, GRIB_LOG_ERROR,
                           "%s unable to get %s to compute size", a->name, self->numberOfElements);
          return ret;
      }
      (*numberOfElements)++;
  
      return ret;
  }
  
  static long byte_offset(grib_accessor* a)
  {
      return a->offset;
  }
  
  static void update_size(grib_accessor* a, size_t s)
  {
      a->length = s;
  }
  
  static long next_offset(grib_accessor* a)
  {
      return byte_offset(a) + a->length;
  }
  