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eccodes/src/grib_accessor_class_signed.cc

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/*
* (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_long
IMPLEMENTS = unpack_long;pack_long
IMPLEMENTS = init;dump
IMPLEMENTS = next_offset
IMPLEMENTS = byte_count
IMPLEMENTS = value_count
IMPLEMENTS = byte_offset
IMPLEMENTS = update_size; is_missing
MEMBERS = grib_arguments* arg
MEMBERS = int nbytes;
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 is_missing(grib_accessor*);
static int pack_long(grib_accessor*, const long* val, size_t* len);
static int unpack_long(grib_accessor*, long* val, size_t* len);
static long byte_count(grib_accessor*);
static long byte_offset(grib_accessor*);
static long next_offset(grib_accessor*);
static int value_count(grib_accessor*, long*);
static void dump(grib_accessor*, grib_dumper*);
static void init(grib_accessor*, const long, grib_arguments*);
static void init_class(grib_accessor_class*);
static void update_size(grib_accessor*, size_t);
typedef struct grib_accessor_signed
{
grib_accessor att;
/* Members defined in gen */
/* Members defined in long */
/* Members defined in signed */
grib_arguments* arg;
int nbytes;
} grib_accessor_signed;
extern grib_accessor_class* grib_accessor_class_long;
static grib_accessor_class _grib_accessor_class_signed = {
&grib_accessor_class_long, /* super */
"signed", /* name */
sizeof(grib_accessor_signed), /* size */
0, /* inited */
&init_class, /* init_class */
&init, /* init */
0, /* post_init */
0, /* free mem */
&dump, /* describes himself */
&next_offset, /* get length of section */
0, /* get length of string */
&value_count, /* get number of values */
&byte_count, /* get number of bytes */
&byte_offset, /* get offset to bytes */
0, /* get native type */
0, /* get sub_section */
0, /* grib_pack procedures long */
&is_missing, /* grib_pack procedures long */
&pack_long, /* grib_pack procedures long */
&unpack_long, /* grib_unpack procedures long */
0, /* grib_pack procedures double */
0, /* grib_unpack procedures double */
0, /* grib_pack procedures string */
0, /* 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 */
&update_size, /* 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 given set of elements */
0, /* unpack a subarray */
0, /* clear */
0, /* clone accessor */
};
grib_accessor_class* grib_accessor_class_signed = &_grib_accessor_class_signed;
static void init_class(grib_accessor_class* c)
{
c->string_length = (*(c->super))->string_length;
c->get_native_type = (*(c->super))->get_native_type;
c->sub_section = (*(c->super))->sub_section;
c->pack_missing = (*(c->super))->pack_missing;
c->pack_double = (*(c->super))->pack_double;
c->unpack_double = (*(c->super))->unpack_double;
c->pack_string = (*(c->super))->pack_string;
c->unpack_string = (*(c->super))->unpack_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->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_element_set = (*(c->super))->unpack_double_element_set;
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 len, grib_arguments* arg)
{
grib_accessor_signed* self = (grib_accessor_signed*)a;
long count = 0;
self->arg = arg;
grib_value_count(a, &count);
a->length = len * count;
self->nbytes = len;
Assert(a->length >= 0);
}
static void dump(grib_accessor* a, grib_dumper* dumper)
{
long rlen = 0;
grib_value_count(a, &rlen);
if (rlen == 1)
grib_dump_long(dumper, a, NULL);
else
grib_dump_values(dumper, a);
}
static const long ones[] = {
0,
-0x7f,
-0x7fff,
-0x7fffff,
-0x7fffffff,
};
static int unpack_long(grib_accessor* a, long* val, size_t* len)
{
grib_accessor_signed* self = (grib_accessor_signed*)a;
unsigned long rlen = 0;
int err = 0;
long count = 0;
unsigned long i = 0;
grib_handle* hand = grib_handle_of_accessor(a);
long pos = a->offset;
long missing = 0;
err = grib_value_count(a, &count);
if (err)
return err;
rlen = count;
if (*len < rlen) {
grib_context_log(a->context, GRIB_LOG_ERROR, "Wrong size for %s, it contains %lu values", a->name, rlen);
*len = 0;
return GRIB_ARRAY_TOO_SMALL;
}
if (a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING) {
Assert(self->nbytes <= 4);
missing = ones[self->nbytes];
}
for (i = 0; i < rlen; i++) {
val[i] = (long)grib_decode_signed_long(hand->buffer->data, pos, self->nbytes);
if (missing)
if (val[i] == missing)
val[i] = GRIB_MISSING_LONG;
pos += self->nbytes;
}
*len = rlen;
return GRIB_SUCCESS;
}
static int pack_long(grib_accessor* a, const long* val, size_t* len)
{
grib_accessor_signed* self = (grib_accessor_signed*)a;
int ret = 0;
long off = 0;
unsigned long rlen = 0;
int err = 0;
long count = 0;
size_t buflen = 0;
unsigned char* buf = NULL;
unsigned long i = 0;
long missing = 0;
err = grib_value_count(a, &count);
if (err)
return err;
rlen = count;
if (*len < 1) {
grib_context_log(a->context, GRIB_LOG_ERROR, "Wrong size for %s it contains %d values ", a->name, 1);
len[0] = 0;
return GRIB_ARRAY_TOO_SMALL;
}
if (a->flags & GRIB_ACCESSOR_FLAG_CAN_BE_MISSING) {
Assert(self->nbytes <= 4);
missing = ones[self->nbytes];
}
if (rlen == 1) {
long v = val[0];
if (missing)
if (v == GRIB_MISSING_LONG)
v = missing;
off = a->offset;
ret = grib_encode_signed_long(grib_handle_of_accessor(a)->buffer->data, v, off, a->length);
if (ret == GRIB_SUCCESS)
len[0] = 1;
if (*len > 1)
grib_context_log(a->context, GRIB_LOG_WARNING, "grib_accessor_signed : Trying to pack %d values in a scalar %s, packing first value", *len, a->name);
len[0] = 1;
return ret;
}
/* TODO: We assume that there are no missing values if there are more that 1 value */
buflen = *len * a->length;
buf = (unsigned char*)grib_context_malloc(a->context, buflen);
for (i = 0; i < *len; i++) {
grib_encode_signed_long(buf, val[i], off, a->length);
off += a->length;
}
ret = grib_set_long_internal(grib_handle_of_accessor(a), grib_arguments_get_name(a->parent->h, self->arg, 0), *len);
if (ret == GRIB_SUCCESS)
grib_buffer_replace(a, buf, buflen, 1, 1);
else
*len = 0;
grib_context_free(a->context, buf);
return ret;
}
static long byte_count(grib_accessor* a)
{
return a->length;
}
static int value_count(grib_accessor* a, long* len)
{
grib_accessor_signed* self = (grib_accessor_signed*)a;
*len = 0;
if (!self->arg) {
*len = 1;
return 0;
}
return grib_get_long_internal(grib_handle_of_accessor(a), grib_arguments_get_name(a->parent->h, self->arg, 0), len);
}
static long byte_offset(grib_accessor* a)
{
return a->offset;
}
static void update_size(grib_accessor* a, size_t s)
{
a->length = s;
Assert(a->length >= 0);
}
static long next_offset(grib_accessor* a)
{
return grib_byte_offset(a) + grib_byte_count(a);
}
static int is_missing(grib_accessor* a)
{
int i = 0;
unsigned char ff = 0xff;
unsigned long offset = a->offset;
grib_handle* hand = grib_handle_of_accessor(a);
if (a->length == 0) {
Assert(a->vvalue != NULL);
return a->vvalue->missing;
}
for (i = 0; i < a->length; i++) {
if (hand->buffer->data[offset] != ff)
return 0;
offset++;
}
return 1;
}
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