/*
 * (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_ascii
   IMPLEMENTS = unpack_string;pack_string
   IMPLEMENTS = init; string_length
   MEMBERS=  const char* input
   MEMBERS=  int trim_left
   MEMBERS=  int trim_right
   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_string(grib_accessor*, const char*, size_t* len);
static int unpack_string(grib_accessor*, char*, size_t* len);
static size_t string_length(grib_accessor*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_trim
{
    grib_accessor att;
    /* Members defined in gen */
    /* Members defined in ascii */
    /* Members defined in trim */
    const char* input;
    int trim_left;
    int trim_right;
} grib_accessor_trim;

extern grib_accessor_class* grib_accessor_class_ascii;

static grib_accessor_class _grib_accessor_class_trim = {
    &grib_accessor_class_ascii,                      /* super                     */
    "trim",                      /* name                      */
    sizeof(grib_accessor_trim),  /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    &init,                       /* init                      */
    0,                  /* post_init                      */
    0,                    /* free mem                       */
    0,                       /* describes himself         */
    0,                /* get length of section     */
    &string_length,              /* 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    */
    0,              /* grib_unpack procedures double  */
    &pack_string,                /* 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_trim = &_grib_accessor_class_trim;


static void init_class(grib_accessor_class* c)
{
    c->dump    =    (*(c->super))->dump;
    c->next_offset    =    (*(c->super))->next_offset;
    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->unpack_double    =    (*(c->super))->unpack_double;
    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* arg)
{
    int n                    = 0;
    grib_accessor_trim* self = (grib_accessor_trim*)a;
    grib_handle* h           = grib_handle_of_accessor(a);

    self->input     = grib_arguments_get_name(h, arg, n++);
    self->trim_left = grib_arguments_get_long(h, arg, n++);
    self->trim_right= grib_arguments_get_long(h, arg, n++);
    DebugAssert(self->trim_left == 0 || self->trim_left == 1);
    DebugAssert(self->trim_right == 0 || self->trim_right == 1);
}

static int unpack_string(grib_accessor* a, char* val, size_t* len)
{
    grib_accessor_trim* self = (grib_accessor_trim*)a;

    int err        = 0;
    grib_handle* h = grib_handle_of_accessor(a);
    char input[256] = {0,};
    size_t size    = sizeof(input) / sizeof(*input);
    char* pInput   = input;

    err = grib_get_string(h, self->input, input, &size);
    if (err) return err;

    lrtrim(&pInput, self->trim_left, self->trim_right);
    sprintf(val, "%s", pInput); 
    size = strlen(val);
    *len = size + 1;
    return GRIB_SUCCESS;
}

static int pack_string(grib_accessor* a, const char* val, size_t* len)
{
    char input[256] = {0,};

    size_t inputLen = 256;
    char buf[256]   = {0,};
    char* pBuf = NULL;
    int err;
    grib_handle* h = grib_handle_of_accessor(a);
    grib_accessor_trim* self = (grib_accessor_trim*)a;
    grib_accessor* inputAccesstor = grib_find_accessor(h, self->input);
    if (!inputAccesstor) {
        grib_context_log(a->context, GRIB_LOG_ERROR, "Accessor for %s not found", self->input);
        return GRIB_NOT_FOUND;
    }

    if ((err = grib_get_string(h, self->input, input, &inputLen)) != GRIB_SUCCESS)
        return err;

    sprintf(buf, "%s", val);
    pBuf = buf;
    lrtrim(&pBuf, self->trim_left, self->trim_right);

    return grib_pack_string(inputAccesstor, pBuf, len);
}

static size_t string_length(grib_accessor* a)
{
    return 1024;
}
