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/**
* Copyright 2005-2007 ECMWF
*
* Licensed under the GNU Lesser General Public License which
* incorporates the terms and conditions of version 3 of the GNU
* General Public License.
* See LICENSE and gpl-3.0.txt for details.
*/
/***********************************
* Enrico Fucile
**********************************/
#include "grib_api_internal.h"
#define DIRECT 0
#define INVERSE 1
/*
This is used by make_class.pl
START_CLASS_DEF
CLASS = accessor
SUPER = grib_accessor_class_data_g2simple_packing
IMPLEMENTS = init
IMPLEMENTS = pack_double
IMPLEMENTS = unpack_double
IMPLEMENTS = value_count
MEMBERS=const char* pre_processing
MEMBERS=const char* pre_processing_parameter
END_CLASS_DEF
*/
static int pre_processing_func(double* values,long length, long pre_processing,
double *pre_processing_parameter,int mode);
/* 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_double(grib_accessor*, const double* val,size_t *len);
static int unpack_double(grib_accessor*, double* val,size_t *len);
static long value_count(grib_accessor*);
static void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);
typedef struct grib_accessor_data_g2simple_packing_with_preprocessing {
grib_accessor att;
/* Members defined in gen */
/* Members defined in values */
int carg;
const char* seclen;
const char* offsetdata;
const char* offsetsection;
int dirty;
/* Members defined in data_simple_packing */
const char* units_factor;
const char* units_bias;
const char* changing_precision;
const char* number_of_values;
const char* bits_per_value;
const char* reference_value;
const char* binary_scale_factor;
const char* decimal_scale_factor;
/* Members defined in data_g2simple_packing */
/* Members defined in data_g2simple_packing_with_preprocessing */
const char* pre_processing;
const char* pre_processing_parameter;
} grib_accessor_data_g2simple_packing_with_preprocessing;
extern grib_accessor_class* grib_accessor_class_data_g2simple_packing;
static grib_accessor_class _grib_accessor_class_data_g2simple_packing_with_preprocessing = {
&grib_accessor_class_data_g2simple_packing, /* super */
"data_g2simple_packing_with_preprocessing", /* name */
sizeof(grib_accessor_data_g2simple_packing_with_preprocessing), /* size */
0, /* inited */
&init_class, /* init_class */
&init, /* init */
0, /* post_init */
0, /* free mem */
0, /* describes himself */
0, /* get length of section */
&value_count, /* 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 */
&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 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, /* clear */
};
grib_accessor_class* grib_accessor_class_data_g2simple_packing_with_preprocessing = &_grib_accessor_class_data_g2simple_packing_with_preprocessing;
static void init_class(grib_accessor_class* c)
{
c->dump = (*(c->super))->dump;
c->next_offset = (*(c->super))->next_offset;
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_string = (*(c->super))->pack_string;
c->unpack_string = (*(c->super))->unpack_string;
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->clear = (*(c->super))->clear;
}
/* END_CLASS_IMP */
static void init(grib_accessor* a,const long v, grib_arguments* args)
{
grib_accessor_data_g2simple_packing_with_preprocessing *self =(grib_accessor_data_g2simple_packing_with_preprocessing*)a;
self->pre_processing = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->pre_processing_parameter = grib_arguments_get_name(a->parent->h,args,self->carg++);
a->flags |= GRIB_ACCESSOR_FLAG_DATA;
}
static long value_count(grib_accessor* a)
{
grib_accessor_data_g2simple_packing_with_preprocessing *self =(grib_accessor_data_g2simple_packing_with_preprocessing*)a;
long n_vals= 0;
if(grib_get_long_internal(a->parent->h,self->number_of_values,&n_vals) != GRIB_SUCCESS)
return 0;
return n_vals;
}
static int unpack_double(grib_accessor* a, double* val, size_t *len)
{
grib_accessor_data_g2simple_packing_with_preprocessing* self = (grib_accessor_data_g2simple_packing_with_preprocessing*)a;
grib_accessor_class* super = *(a->cclass->super);
size_t n_vals = grib_value_count(a);
int err = 0;
long pre_processing;
double pre_processing_parameter;
if(n_vals==0){
*len = 0;
return GRIB_SUCCESS;
}
self->dirty=0;
if((err = grib_get_long_internal(a->parent->h,self->pre_processing, &pre_processing)) != GRIB_SUCCESS){
grib_context_log(a->parent->h->context, GRIB_LOG_ERROR, "Accessor %s cannont gather value for %s error %d \n", a->name, self->pre_processing, err);
return err;
}
if((err = grib_get_double_internal(a->parent->h,self->pre_processing_parameter, &pre_processing_parameter)) != GRIB_SUCCESS){
grib_context_log(a->parent->h->context, GRIB_LOG_ERROR, "Accessor %s cannont gather value for %s error %d \n", a->name, self->pre_processing_parameter, err);
return err;
}
err = super->unpack_double(a,val,&n_vals);
if (err!=GRIB_SUCCESS) return err;
err=pre_processing_func(val,n_vals,pre_processing,&pre_processing_parameter,INVERSE);
if (err != GRIB_SUCCESS) return err;
*len = (long) n_vals;
return err;
}
static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
grib_accessor_data_g2simple_packing_with_preprocessing* self = (grib_accessor_data_g2simple_packing_with_preprocessing*)a;
grib_accessor_class* super = *(a->cclass->super);
size_t n_vals = *len;
int err = 0;
long pre_processing=0;
double pre_processing_parameter=0;
self->dirty=1;
if((err = grib_get_long_internal(a->parent->h,self->pre_processing, &pre_processing)) != GRIB_SUCCESS)
return err;
err=pre_processing_func((double*)val,n_vals,pre_processing,&pre_processing_parameter,DIRECT);
if (err != GRIB_SUCCESS) return err;
err = super->pack_double(a,val,len);
if (err!=GRIB_SUCCESS) return err;
if((err = grib_set_double_internal(a->parent->h,self->pre_processing_parameter, pre_processing_parameter)) != GRIB_SUCCESS)
return err;
if((err = grib_set_long_internal(a->parent->h,self->number_of_values, n_vals)) != GRIB_SUCCESS)
return err;
return GRIB_SUCCESS;
}
static int pre_processing_func(double* values,long length, long pre_processing,
double *pre_processing_parameter,int mode) {
int i;
int ret=0;
double min=values[0];
double next_min=values[0];
switch (pre_processing) {
/* NONE */
case 0:
break;
/* LOGARITHM */
case 1:
if (mode == DIRECT) {
for (i=0;i<length;i++) {
if (values[i] < min)
min=values[i];
if (values[i] > next_min)
next_min=values[i];
}
for (i=0;i<length;i++) {
if (values[i] > min && values[i] < next_min )
next_min=values[i];
}
if ( min > 0 ) {
*pre_processing_parameter=0;
for (i=0;i<length;i++)
values[i]=log(values[i]);
} else {
*pre_processing_parameter=next_min-2*min;
if (next_min == min) return ret;
for (i=0;i<length;i++)
values[i]=log(values[i]+*pre_processing_parameter);
}
} else {
if ( *pre_processing_parameter == 0 ) {
for (i=0;i<length;i++)
values[i]=exp(values[i]);
} else {
for (i=0;i<length;i++)
values[i]=exp(values[i])-*pre_processing_parameter;
}
}
break;
default:
ret=GRIB_NOT_IMPLEMENTED;
break;
}
return ret;
}
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