/*
 * (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_gen
   IMPLEMENTS = init;get_native_type;unpack_string
   IMPLEMENTS = byte_count; byte_offset
   MEMBERS = const char* sectionOffset
   MEMBERS = const char* sectionLength
   MEMBERS = long sectionNumber
   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 unpack_string(grib_accessor*, char*, size_t* len);
static long byte_count(grib_accessor*);
static long byte_offset(grib_accessor*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_section_pointer
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in section_pointer */
    const char* sectionOffset;
    const char* sectionLength;
    long sectionNumber;
} grib_accessor_section_pointer;

extern grib_accessor_class* grib_accessor_class_gen;

static grib_accessor_class _grib_accessor_class_section_pointer = {
    &grib_accessor_class_gen,              /* super                     */
    "section_pointer",                     /* name                      */
    sizeof(grib_accessor_section_pointer), /* 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      */
    &byte_count,                           /* get number of bytes      */
    &byte_offset,                          /* get offset to bytes           */
    &get_native_type,                      /* 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    */
    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    */
    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_section_pointer = &_grib_accessor_class_section_pointer;


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->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->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->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 len, grib_arguments* arg)
{
    int n                               = 0;
    grib_accessor_section_pointer* self = (grib_accessor_section_pointer*)a;

    self->sectionOffset = grib_arguments_get_name(grib_handle_of_accessor(a), arg, n++);
    self->sectionLength = grib_arguments_get_name(grib_handle_of_accessor(a), arg, n++);
    self->sectionNumber = grib_arguments_get_long(grib_handle_of_accessor(a), arg, n++);

    Assert(self->sectionNumber < MAX_NUM_SECTIONS);

    grib_handle_of_accessor(a)->section_offset[self->sectionNumber] = (char*)self->sectionOffset;
    grib_handle_of_accessor(a)->section_length[self->sectionNumber] = (char*)self->sectionLength;

    /* printf("++++++++++++++ GRIB_API:  creating section_pointer%d %s %s\n", */
    /* self->sectionNumber,self->sectionLength,self->sectionLength); */

    if (grib_handle_of_accessor(a)->sections_count < self->sectionNumber)
        grib_handle_of_accessor(a)->sections_count = self->sectionNumber;

    a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
    a->flags |= GRIB_ACCESSOR_FLAG_HIDDEN;
    a->flags |= GRIB_ACCESSOR_FLAG_FUNCTION;
    a->flags |= GRIB_ACCESSOR_FLAG_EDITION_SPECIFIC;
    a->length = 0;
}

static int get_native_type(grib_accessor* a)
{
    return GRIB_TYPE_BYTES;
}

static int unpack_string(grib_accessor* a, char* v, size_t* len)
{
    /*
      unsigned char* p=NULL;
      char* s=v;
      int i;
      long length=grib_byte_count(a);

      if (*len < length) return GRIB_ARRAY_TOO_SMALL;

      p  = grib_handle_of_accessor(a)->buffer->data + grib_byte_offset(a);

      for (i = 0; i < length; i++)  {
        sprintf (s,"%02x", *(p++));
        s+=2;
      }
      *len=length;
    */
    sprintf(v, "%ld_%ld", grib_byte_offset(a), grib_byte_count(a));
    return GRIB_SUCCESS;
}

static long byte_count(grib_accessor* a)
{
    grib_accessor_section_pointer* self = (grib_accessor_section_pointer*)a;
    long sectionLength                  = 0;
    int ret                             = 0;

    ret = grib_get_long(grib_handle_of_accessor(a), self->sectionLength, &sectionLength);
    if (ret) {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                         "unable to get %s %s",
                         self->sectionLength, grib_get_error_message(ret));
        return -1;
    }

    return sectionLength;
}

static long byte_offset(grib_accessor* a)
{
    grib_accessor_section_pointer* self = (grib_accessor_section_pointer*)a;
    long sectionOffset                  = 0;
    int ret                             = 0;

    ret = grib_get_long(grib_handle_of_accessor(a), self->sectionOffset, &sectionOffset);
    if (ret) {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                         "unable to get %s %s",
                         self->sectionOffset, grib_get_error_message(ret));
        return -1;
    }

    return sectionOffset;
}
