/*
 * (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_evaluate
   IMPLEMENTS = unpack_double
   IMPLEMENTS = unpack_string
   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 unpack_double(grib_accessor*, double* val, size_t* len);
static int unpack_string(grib_accessor*, char*, size_t* len);
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_round
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in long */
    /* Members defined in evaluate */
    grib_arguments* arg;
    /* Members defined in round */
} grib_accessor_round;

extern grib_accessor_class* grib_accessor_class_evaluate;

static grib_accessor_class _grib_accessor_class_round = {
    &grib_accessor_class_evaluate, /* super                     */
    "round",                       /* name                      */
    sizeof(grib_accessor_round),   /* size                      */
    0,                             /* inited */
    &init_class,                   /* init_class */
    0,                             /* 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      */
    0,                             /* grib_pack procedures long      */
    0,                             /* grib_unpack procedures long    */
    0,                             /* grib_pack procedures double    */
    &unpack_double,                /* 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_round = &_grib_accessor_class_round;


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_long              = (*(c->super))->pack_long;
    c->unpack_long            = (*(c->super))->unpack_long;
    c->pack_double            = (*(c->super))->pack_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 int unpack_double(grib_accessor* a, double* val, size_t* len)
{
    grib_accessor_round* self = (grib_accessor_round*)a;

    int ret = GRIB_SUCCESS;

    size_t replen             = 0;
    double rounding_precision = 0;
    double rounded            = 0;
    double toround            = 0;

    const char* oval = NULL;
    oval             = grib_arguments_get_name(grib_handle_of_accessor(a), self->arg, 0);

    if ((ret = grib_get_double_internal(grib_handle_of_accessor(a), oval, &toround)) != 0)
        return ret;

    rounding_precision = grib_arguments_get_long(grib_handle_of_accessor(a), self->arg, 1);

    rounded = floor(rounding_precision * toround + 0.5) / rounding_precision;

    *len = replen;

    *val = rounded;

    return ret;
}

static int unpack_string(grib_accessor* a, char* val, size_t* len)
{
    char result[1024];
    int ret       = GRIB_SUCCESS;
    size_t replen = 1;

    double value = 0;

    ret = unpack_double(a, &value, &replen);

    sprintf(result, "%.3f", value);

    replen = strlen(result) + 1;

    if (*len < replen) {
        *len = replen;
        return GRIB_ARRAY_TOO_SMALL;
    }

    *len = replen;

    sprintf(val, "%s", result);

    return ret;
}
