/*
* Copyright 2005-2017 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 = unpack_double;pack_double
IMPLEMENTS = unpack_string_array
IMPLEMENTS = init;dump;destroy
IMPLEMENTS = value_count;get_native_type
MEMBERS    = const char* expandedDescriptors
MEMBERS    = const char* expandedScale
MEMBERS    = const char* expandedReference
MEMBERS    = const char* expandedWidth
MEMBERS    = const char* abbreviation
MEMBERS    = const char* type
MEMBERS    = const char* name
MEMBERS    = const char* unit
MEMBERS    = int index
MEMBERS    = long* expandedAO
MEMBERS    = long* scaleAO
MEMBERS    = double* referenceAO
MEMBERS    = long* widthAO
MEMBERS    = long* bitmapNumber
MEMBERS    = long* associatedBitmapNumber
MEMBERS    = long* associatedBitmapIndex
MEMBERS    = long* associatedInfoNumber
MEMBERS    = char** abbreviations
MEMBERS    = char** types
MEMBERS    = char** names
MEMBERS    = char** units
MEMBERS    = size_t expandedAOSize
MEMBERS    = int do_compute

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_double(grib_accessor*, const double* val,size_t *len);
static int pack_long(grib_accessor*, const long* val,size_t *len);
static int unpack_double(grib_accessor*, double* val,size_t *len);
static int unpack_long(grib_accessor*, long* val,size_t *len);
static int unpack_string_array (grib_accessor*, char**, size_t *len);
static int value_count(grib_accessor*,long*);
static void destroy(grib_context*,grib_accessor*);
static void dump(grib_accessor*, grib_dumper*);
static void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);

typedef struct grib_accessor_apply_operators {
    grib_accessor          att;
/* Members defined in gen */
/* Members defined in long */
/* Members defined in apply_operators */
	const char* expandedDescriptors;
	const char* expandedScale;
	const char* expandedReference;
	const char* expandedWidth;
	const char* abbreviation;
	const char* type;
	const char* name;
	const char* unit;
	int index;
	long* expandedAO;
	long* scaleAO;
	double* referenceAO;
	long* widthAO;
	long* bitmapNumber;
	long* associatedBitmapNumber;
	long* associatedBitmapIndex;
	long* associatedInfoNumber;
	char** abbreviations;
	char** types;
	char** names;
	char** units;
	size_t expandedAOSize;
	int do_compute;
} grib_accessor_apply_operators;

extern grib_accessor_class* grib_accessor_class_long;

static grib_accessor_class _grib_accessor_class_apply_operators = {
    &grib_accessor_class_long,                      /* super                     */
    "apply_operators",                      /* name                      */
    sizeof(grib_accessor_apply_operators),  /* size                      */
    0,                           /* inited */
    &init_class,                 /* init_class */
    &init,                       /* init                      */
    0,                  /* post_init                      */
    &destroy,                    /* free mem                       */
    &dump,                       /* describes himself         */
    0,                /* get length of section     */
    0,              /* get length of string      */
    &value_count,                /* get number of values      */
    0,                 /* get number of bytes      */
    0,                /* get offset to bytes           */
    &get_native_type,            /* 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    */
    &pack_double,                /* grib_pack procedures double    */
    &unpack_double,              /* grib_unpack procedures double  */
    0,                /* grib_pack procedures string    */
    0,              /* grib_unpack procedures string  */
    0,          /* grib_pack array procedures string    */
    &unpack_string_array,        /* 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_apply_operators = &_grib_accessor_class_apply_operators;


static void init_class(grib_accessor_class* c)
{
	c->next_offset	=	(*(c->super))->next_offset;
	c->string_length	=	(*(c->super))->string_length;
	c->byte_count	=	(*(c->super))->byte_count;
	c->byte_offset	=	(*(c->super))->byte_offset;
	c->sub_section	=	(*(c->super))->sub_section;
	c->pack_missing	=	(*(c->super))->pack_missing;
	c->is_missing	=	(*(c->super))->is_missing;
	c->pack_string	=	(*(c->super))->pack_string;
	c->unpack_string	=	(*(c->super))->unpack_string;
	c->pack_string_array	=	(*(c->super))->pack_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 */

#define MAX_DELAYED_REPLICATION_COUNT 1000

static void self_clear(grib_context* c,grib_accessor_apply_operators* self)
{
    size_t i=0;
    if (!self->expandedAOSize) return;

    grib_context_free(c,self->expandedAO);
    grib_context_free(c,self->scaleAO);
    grib_context_free(c,self->referenceAO);
    grib_context_free(c,self->widthAO);
    grib_context_free(c,self->bitmapNumber);
    grib_context_free(c,self->associatedBitmapNumber);
    grib_context_free(c,self->associatedBitmapIndex);
    grib_context_free(c,self->associatedInfoNumber);

    for (i=0;i<self->expandedAOSize;i++) {
        if (!self->abbreviations[i]) break;
        grib_context_free(c,self->abbreviations[i]);
        grib_context_free(c,self->types[i]);
        grib_context_free(c,self->names[i]);
        grib_context_free(c,self->units[i]);
    }
    grib_context_free(c,self->abbreviations);
    grib_context_free(c,self->types);
    grib_context_free(c,self->names);
    grib_context_free(c,self->units);
}

static void init(grib_accessor* a, const long len , grib_arguments* args )
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    int n=0;
    self->expandedDescriptors=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->abbreviation=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->type=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->name=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->unit=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->expandedScale=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->expandedReference=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->expandedWidth=grib_arguments_get_name(grib_handle_of_accessor(a),args,n++);
    self->index=grib_arguments_get_long(grib_handle_of_accessor(a),args,n++);
    self->do_compute=1;
    a->length = 0;
    self->scaleAO=0;
    self->expandedAOSize=0;
}

static void dump(grib_accessor* a, grib_dumper* dumper)
{
    int type=get_native_type(a);

    switch (type) {
    case GRIB_TYPE_LONG:
        grib_dump_long(dumper,a,NULL);
        break;
    case GRIB_TYPE_DOUBLE:
        grib_dump_double(dumper,a,NULL);
        break;
    case GRIB_TYPE_STRING:
        grib_dump_string_array(dumper,a,NULL);
        break;
    }
}

static int  get_native_type(grib_accessor* a)
{
    int type=GRIB_TYPE_LONG;
    if (a->flags & GRIB_ACCESSOR_FLAG_STRING_TYPE)
        type=GRIB_TYPE_STRING;
    return type;
}

size_t compute_size_AO(long* descriptors,size_t numberOfDescriptors)
{
    int i=0;
    size_t sizeAO=numberOfDescriptors;
    int extraElement=0;
    int X,F,Y;

    for (i=0;i<numberOfDescriptors;i++) {
        F=descriptors[i]/100000;
        X=(descriptors[i]-F*100000)/1000;
        Y=(descriptors[i]-F*100000)%1000;
        if (F==0 && X!=31) sizeAO+=extraElement;
        if (F==2 && X==4) extraElement= Y ? 1 : 0;
    }
    return sizeAO;
}

static void set_bitmap_number(long* descriptors,int *useDefinedBitmap,size_t* i,int* bitmapNumber)
{
    switch (descriptors[(*i)+1]) {
    case 236000:
        *useDefinedBitmap=1;
        (*bitmapNumber)++;
        (*i)++;
        break;
    case 237000:
        if (! *useDefinedBitmap) (*bitmapNumber)++;
        (*i)++;
        break;
    case 237255:
        *useDefinedBitmap=0;
        break;
    default:
        (*bitmapNumber)++;
    }
}

static void computeDelayedReplication(grib_accessor_apply_operators* self,
        long* delayedReplication,long* delayedReplicationIndex,long delayedReplicationCount,long index)
{
    long i=0;
    for (i=0;i<delayedReplicationCount;i++) {
        if (delayedReplication[i]>0) {
            self->expandedAO[delayedReplicationIndex[i]]-=1000;
            delayedReplication[i]--;
        }
    }
}

static int apply_operators(grib_accessor* a)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    grib_context* c=a->context;
    grib_handle* h=grib_handle_of_accessor(a);
    int useDefinedBitmap;
    long* descriptors=0;
    long* scale=0;
    long* width=0;
    long* reference=0;
    char** abbreviations=0;
    char** names=0;
    char** types=0;
    char** units=0;
    int bitmapNumber=0;
    double referenceValueFactor=1;
    int X,F,Y;
    long extraWidth=0,extraScale=0,localDescriptorWidth=0;
    size_t size=0,sizeAO=0,iq=0,numberOfDescriptors;
    size_t i=0,j=0,ielement=0;
    int err=0;
    char* missing="???";
    long associatedFieldWidth=0;
    char* firstOrderStatisticsAbbreviation="firstOrderStatistics";
    char* differenceStatisticsAbbreviation="differenceStatistics";
    char* associatedFieldAbbreviation="associatedField";
    char* substitutedValueAbbreviation="substitutedValue";
    char* associatedFieldName="associated field";
    char* associatedFieldType="long";
    char* associatedFieldUnit="CODE TABLE 31021";
    long associatedFieldDescriptor=99999;
    long delayedReplication[MAX_DELAYED_REPLICATION_COUNT]={0,};
    long delayedReplicationIndex[MAX_DELAYED_REPLICATION_COUNT]={0,};
    long delayedReplicationCount=0;
    long iassociatedInfoNumber=0;
    int id=0;

    if (!self->do_compute) return GRIB_SUCCESS;
    self_clear(c,self);

    err=grib_get_size(grib_handle_of_accessor(a),self->expandedDescriptors,&size);
    if (err) return err;
    numberOfDescriptors=size;

    descriptors=(long*)grib_context_malloc_clear(c,sizeof(long)*size);
    scale=(long*)grib_context_malloc_clear(c,sizeof(long)*size);
    reference=(long*)grib_context_malloc_clear(c,sizeof(long)*size);
    width=(long*)grib_context_malloc_clear(c,sizeof(long)*size);

    abbreviations=(char**)grib_context_malloc_clear(c,sizeof(char*)*size);
    types=(char**)grib_context_malloc_clear(c,sizeof(char*)*size);
    names=(char**)grib_context_malloc_clear(c,sizeof(char*)*size);
    units=(char**)grib_context_malloc_clear(c,sizeof(char*)*size);

    err=grib_get_string_array(h,self->abbreviation,abbreviations,&size);
    if (err) return err;
    err=grib_get_string_array(h,self->type,types,&size);
    if (err) return err;
    err=grib_get_string_array(h,self->name,names,&size);
    if (err) return err;
    err=grib_get_string_array(h,self->unit,units,&size);
    if (err) return err;

    err=grib_get_long_array(h,self->expandedDescriptors,descriptors,&size);
    if (err) return err;
    err=grib_get_long_array(h,self->expandedScale,scale,&size);
    if (err) return err;
    err=grib_get_long_array(h,self->expandedReference,reference,&size);
    if (err) return err;
    err=grib_get_long_array(h,self->expandedWidth,width,&size);
    if (err) return err;

    sizeAO=compute_size_AO(descriptors,numberOfDescriptors);
    self->expandedAO=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->scaleAO=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->referenceAO=(double*)grib_context_malloc_clear(c,sizeof(double)*sizeAO);
    self->widthAO=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->bitmapNumber=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->associatedBitmapNumber=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->associatedBitmapIndex=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->associatedInfoNumber=(long*)grib_context_malloc_clear(c,sizeof(long)*sizeAO);
    self->abbreviations=(char**)grib_context_malloc_clear(c,sizeof(char*)*sizeAO);
    self->types=(char**)grib_context_malloc_clear(c,sizeof(char*)*sizeAO);
    self->names=(char**)grib_context_malloc_clear(c,sizeof(char*)*sizeAO);
    self->units=(char**)grib_context_malloc_clear(c,sizeof(char*)*sizeAO);

    j=0;
    ielement=0;
    iassociatedInfoNumber=0;
    for (i=0;i<numberOfDescriptors;i++) {
        F=descriptors[i]/100000;
        X=(descriptors[i]-F*100000)/1000;
        Y=(descriptors[i]-F*100000)%1000;

        if ( F==2 ) {
            /*operators*/
            switch (X) {
            case 1:
                extraWidth = Y ? Y-128 : 0;
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 2:
                extraScale = Y ? Y-128 : 0;
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 4:
                /* associated field*/
                associatedFieldWidth=Y;
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 6:
                /*signify data width*/
                localDescriptorWidth=Y;
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 7:
                if (Y) {
                    extraScale = Y;
                    referenceValueFactor=grib_power(Y,10);
                    extraWidth=((10*Y)+2)/3;
                } else {
                    extraWidth=0;
                    extraScale=0;
                    referenceValueFactor=1;
                }
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 22:
                /*quality information follows*/
                iq=1;
                set_bitmap_number(descriptors,&useDefinedBitmap,&i,&bitmapNumber);
                iassociatedInfoNumber=bitmapNumber;
                computeDelayedReplication(self,delayedReplication,delayedReplicationIndex,delayedReplicationCount,i);
                break;
            case 23:
                /*substituted values*/
                switch (Y) {
                case 0:
                    iq=1;
                    set_bitmap_number(descriptors,&useDefinedBitmap,&i,&bitmapNumber);
                    iassociatedInfoNumber=bitmapNumber;
                    break;
                case 255:
                    self->expandedAO[j]=descriptors[i];
                    self->associatedBitmapIndex[j]=iq;
                    self->associatedBitmapNumber[j]=bitmapNumber;
                    self->abbreviations[j]=grib_context_strdup(c,substitutedValueAbbreviation);
                    self->types[j]=grib_context_strdup(c,missing);
                    self->names[j]=grib_context_strdup(c,missing);
                    self->units[j]=grib_context_strdup(c,missing);
                    iq++;
                    j++;
                    break;
                default :
                    grib_context_log(c,GRIB_LOG_FATAL,"operator %d not implemented", (int)descriptors[i]);
                }
                break;
                case 24:
                    /*first order statistical operators values*/
                    switch (Y) {
                    case 0:
                        iq=1;
                        set_bitmap_number(descriptors,&useDefinedBitmap,&i,&bitmapNumber);
                        iassociatedInfoNumber=bitmapNumber;
                        break;
                    case 255:
                        self->expandedAO[j]=descriptors[i];
                        self->associatedBitmapIndex[j]=iq;
                        self->associatedBitmapNumber[j]=bitmapNumber;
                        self->abbreviations[j]=grib_context_strdup(c,firstOrderStatisticsAbbreviation);
                        self->types[j]=grib_context_strdup(c,missing);
                        self->names[j]=grib_context_strdup(c,missing);
                        self->units[j]=grib_context_strdup(c,missing);
                        iq++;
                        j++;
                        break;
                    default :
                        grib_context_log(c,GRIB_LOG_FATAL,"operator %d not implemented", (int)descriptors[i]);
                    }
                    break;
                    case 25:
                        /*difference statistical operators values*/
                        switch (Y) {
                        case 0:
                            iq=1;
                            set_bitmap_number(descriptors,&useDefinedBitmap,&i,&bitmapNumber);
                            iassociatedInfoNumber=bitmapNumber;
                            break;
                        case 255:
                            self->expandedAO[j]=descriptors[i];
                            self->associatedBitmapIndex[j]=iq;
                            self->associatedBitmapNumber[j]=bitmapNumber;
                            self->abbreviations[j]=grib_context_strdup(c,differenceStatisticsAbbreviation);
                            self->types[j]=grib_context_strdup(c,missing);
                            self->names[j]=grib_context_strdup(c,missing);
                            self->units[j]=grib_context_strdup(c,missing);
                            iq++;
                            j++;
                            break;
                        default :
                            grib_context_log(c,GRIB_LOG_FATAL,"operator %d not implemented", (int)descriptors[i]);
                        }
                        break;
                        default:
                            grib_context_log(c,GRIB_LOG_ERROR,"operator %d not implemented",(int)descriptors[i]);
            }
        } else if ( F==1 ) {
            self->expandedAO[j]=descriptors[i];
            self->abbreviations[j]=grib_context_strdup(c,missing);
            self->types[j]=grib_context_strdup(c,missing);
            self->names[j]=grib_context_strdup(c,missing);
            self->units[j]=grib_context_strdup(c,missing);
            delayedReplication[delayedReplicationCount]=X;
            delayedReplicationIndex[delayedReplicationCount]=j;
            delayedReplicationCount++;
            Assert(delayedReplicationCount<=MAX_DELAYED_REPLICATION_COUNT);
            j++;
        } else {
            if (localDescriptorWidth) {
                if (scale[ielement]==GRIB_MISSING_LONG) scale[ielement] = 0 ;
                if (reference[ielement]==GRIB_MISSING_LONG) reference[ielement]=0;
                if (width[ielement]==GRIB_MISSING_LONG) width[ielement]=localDescriptorWidth;
                localDescriptorWidth=0;
            }
            if (associatedFieldWidth && X!=31) {
                self->scaleAO[j]=0;
                self->referenceAO[j]=0;
                self->widthAO[j]=associatedFieldWidth;
                self->abbreviations[j]=grib_context_strdup(c,associatedFieldAbbreviation);
                self->names[j]=grib_context_strdup(c,associatedFieldName);
                self->types[j]=grib_context_strdup(c,associatedFieldType);
                self->units[j]=grib_context_strdup(c,associatedFieldUnit);
                self->expandedAO[j]=associatedFieldDescriptor;

                for (id=0;id<delayedReplicationCount;id++) delayedReplication[id]--;
                j++;
            }
            if (!strncmp(units[ielement],"CODE",4) || !strncmp(units[ielement],"FLAG",4)) {
                self->scaleAO[j]=scale[ielement];
                self->associatedInfoNumber[j]=iassociatedInfoNumber;
                self->referenceAO[j]=reference[ielement];
                self->widthAO[j]=width[ielement];
            } else {
                self->scaleAO[j]=extraScale+scale[ielement];
                self->associatedInfoNumber[j]=iassociatedInfoNumber;
                self->referenceAO[j]=reference[ielement]*referenceValueFactor;
                self->widthAO[j]=width[ielement]+extraWidth;
            }
            self->abbreviations[j]=abbreviations[ielement];
            self->names[j]=names[ielement];
            self->types[j]=types[ielement];
            self->units[j]=units[ielement];
            self->expandedAO[j]=descriptors[i];
            /* quality information*/
            if (X==33) {
                self->associatedBitmapIndex[j]=iq;
                self->associatedBitmapNumber[j]=bitmapNumber;
                iq++;
            }
            /* bitmap */
            if (X==31 && Y==31) { self->bitmapNumber[j]=bitmapNumber; }

            for (id=0;id<delayedReplicationCount;id++) delayedReplication[id]--;
            j++;
            ielement++;
        }

    }
    self->expandedAOSize=j;

    /* {
        int mycount=1;
        printf("+++++++++++++++++++++++++++++\n");
        for (i=0;i<self->expandedAOSize;i++) {
            printf("%.6ld ",self->expandedAO[i]);
            if (mycount>15) {mycount=0;printf("\n");}
            mycount++;
        }
        printf("\n");
    } */

    grib_context_free(c,abbreviations);
    grib_context_free(c,names);
    grib_context_free(c,types);
    grib_context_free(c,units);
    grib_context_free(c,descriptors);
    grib_context_free(c,scale);
    grib_context_free(c,reference);
    grib_context_free(c,width);
    self->do_compute=0;

    return err;
}

static void long_to_string(grib_context* c,long* v,size_t len,char** val)
{
    size_t i;
    char tmp[1024]={0,};
    for (i=0;i<len;i++) {
        sprintf(tmp,"%ld",v[i]);
        val[i]=grib_context_strdup(c,tmp);
    }
}

static void double_to_string(grib_context* c,double* v,size_t len,char** val)
{
    size_t i;
    char tmp[1024]={0,};
    for (i=0;i<len;i++) {
        sprintf(tmp,"%g",v[i]);
        val[i]=grib_context_strdup(c,tmp);
    }
}

static int unpack_string_array (grib_accessor* a, char** val, size_t *len)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    int ret=0;
    int i=0;
    grib_context* c=a->context;

    ret=apply_operators(a);
    if (ret) return ret;

    if(*len < self->expandedAOSize)
    {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                " wrong size (%ld) for %s it contains %d values ",*len, a->name , self->expandedAOSize);
        *len = 0;
        return GRIB_ARRAY_TOO_SMALL;
    }

    *len = self->expandedAOSize;
    switch (self->index) {
    case 0:
        long_to_string(a->context,self->expandedAO,self->expandedAOSize,val);
        break;
    case 1:
        long_to_string(a->context,self->scaleAO,self->expandedAOSize,val);
        break;
    case 2:
        double_to_string(a->context,self->referenceAO,self->expandedAOSize,val);
        break;
    case 3:
        long_to_string(a->context,self->widthAO,self->expandedAOSize,val);
        break;
    case 4:
        long_to_string(a->context,self->bitmapNumber,self->expandedAOSize,val);
        break;
    case 5:
        long_to_string(a->context,self->associatedBitmapNumber,self->expandedAOSize,val);
        break;
    case 6:
        long_to_string(a->context,self->associatedBitmapIndex,self->expandedAOSize,val);
        break;
    case 7:
        for (i=0;i<self->expandedAOSize;i++)
            val[i]=grib_context_strdup(c,self->abbreviations[i]);
        break;
    case 8:
        for (i=0;i<self->expandedAOSize;i++)
            val[i]=grib_context_strdup(c,self->types[i]);
        break;
    case 9:
        for (i=0;i<self->expandedAOSize;i++)
            val[i]=grib_context_strdup(c,self->names[i]);
        break;
    case 10:
        for (i=0;i<self->expandedAOSize;i++)
            val[i]=grib_context_strdup(c,self->units[i]);
        break;
    case 11:
        long_to_string(a->context,self->associatedInfoNumber,self->expandedAOSize,val);
        break;
    default:
        Assert(0);
    }

    return GRIB_SUCCESS;
}

static int unpack_long(grib_accessor* a, long* val, size_t *len)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    int ret=0;
    size_t i;

    ret=apply_operators(a);
    if (ret) return ret;

    if(*len < self->expandedAOSize)
    {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                " wrong size (%ld) for %s it contains %d values ",*len, a->name , self->expandedAOSize);
        *len = 0;
        return GRIB_ARRAY_TOO_SMALL;
    }

    *len = self->expandedAOSize;
    switch (self->index) {
    case 0:
        for (i=0;i<*len;i++) val[i]=self->expandedAO[i];
        break;
    case 1:
        for (i=0;i<*len;i++) val[i]=self->scaleAO[i];
        break;
    case 2:
        for (i=0;i<*len;i++) val[i]=self->referenceAO[i];
        break;
    case 3:
        for (i=0;i<*len;i++) val[i]=self->widthAO[i];
        break;
    case 4:
        for (i=0;i<*len;i++) val[i]=self->bitmapNumber[i];
        break;
    case 5:
        for (i=0;i<*len;i++) val[i]=self->associatedBitmapNumber[i];
        break;
    case 6:
        for (i=0;i<*len;i++) val[i]=self->associatedBitmapIndex[i];
        break;
    case 11:
        for (i=0;i<*len;i++) val[i]=self->associatedInfoNumber[i];
        break;
    default:
        Assert(0);
    }

    return GRIB_SUCCESS;
}

static int unpack_double(grib_accessor* a, double* val, size_t *len)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    int ret=0;
    size_t i;

    ret=apply_operators(a);
    if (ret) return ret;

    if(*len < self->expandedAOSize)
    {
        grib_context_log(a->context, GRIB_LOG_ERROR,
                " wrong size (%ld) for %s it contains %d values ",*len, a->name , self->expandedAOSize);
        *len = 0;
        return GRIB_ARRAY_TOO_SMALL;
    }

    *len = self->expandedAOSize;
    switch (self->index) {
    case 0:
        for (i=0;i<*len;i++) val[i]=self->expandedAO[i];
        break;
    case 1:
        for (i=0;i<*len;i++) val[i]=self->scaleAO[i];
        break;
    case 2:
        for (i=0;i<*len;i++) val[i]=self->referenceAO[i];
        break;
    case 3:
        for (i=0;i<*len;i++) val[i]=self->widthAO[i];
        break;
    case 4:
        for (i=0;i<*len;i++) val[i]=self->bitmapNumber[i];
        break;
    case 5:
        for (i=0;i<*len;i++) val[i]=self->associatedBitmapNumber[i];
        break;
    case 6:
        for (i=0;i<*len;i++) val[i]=self->associatedBitmapIndex[i];
        break;
    default:
        Assert(0);
    }

    return GRIB_SUCCESS;
}

static int pack_long(grib_accessor* a, const long* val, size_t *len)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    self->do_compute=1;
    return GRIB_NOT_IMPLEMENTED;
}

static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    self->do_compute=1;
    return GRIB_NOT_IMPLEMENTED;
}

static int value_count(grib_accessor* a,long* rlen)
{
    int ret=0;
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    *rlen=0;

    ret=apply_operators(a);

    if (ret) {
        grib_context_log(a->context,GRIB_LOG_ERROR,
                "%s unable to compute size",a->name);
        return ret;
    }

    *rlen=self->expandedAOSize;

    return ret;
}

static void destroy(grib_context* c,grib_accessor* a)
{
    grib_accessor_apply_operators* self = (grib_accessor_apply_operators*)a;
    self_clear(c,self);
}
