/*
 * (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_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 len   = 1;
    double value = GRIB_MISSING_DOUBLE;

    if (a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING)
        return grib_pack_double(a, &value, &len);
    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;
}
*/
