mirror of https://github.com/ecmwf/eccodes.git
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/*
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* (C) Copyright 2005- ECMWF.
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*
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* This software is licensed under the terms of the Apache Licence Version 2.0
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* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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*
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* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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*/
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#include "grib_api_internal.h"
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/*
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This is used by make_class.pl
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START_CLASS_DEF
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CLASS = accessor
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SUPER = grib_accessor_class_gen
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IMPLEMENTS = unpack_long
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IMPLEMENTS = get_native_type
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END_CLASS_DEF
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*/
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/* START_CLASS_IMP */
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/*
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Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
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Instead edit values between START_CLASS_DEF and END_CLASS_DEF
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or edit "accessor.class" and rerun ./make_class.pl
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*/
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static int get_native_type(grib_accessor*);
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static int unpack_long(grib_accessor*, long* val, size_t* len);
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typedef struct grib_accessor_uint64
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{
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grib_accessor att;
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/* Members defined in gen */
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/* Members defined in uint64 */
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} grib_accessor_uint64;
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extern grib_accessor_class* grib_accessor_class_gen;
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static grib_accessor_class _grib_accessor_class_uint64 = {
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&grib_accessor_class_gen, /* super */
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"uint64", /* name */
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sizeof(grib_accessor_uint64), /* size */
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0, /* inited */
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0, /* init_class */
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0, /* init */
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0, /* post_init */
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0, /* destroy */
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0, /* dump */
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0, /* next_offset */
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0, /* get length of string */
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0, /* get number of values */
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0, /* get number of bytes */
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0, /* get offset to bytes */
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&get_native_type, /* get native type */
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0, /* get sub_section */
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0, /* pack_missing */
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0, /* is_missing */
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0, /* pack_long */
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&unpack_long, /* unpack_long */
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0, /* pack_double */
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0, /* pack_float */
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0, /* unpack_double */
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0, /* unpack_float */
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0, /* pack_string */
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0, /* unpack_string */
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0, /* pack_string_array */
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0, /* unpack_string_array */
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0, /* pack_bytes */
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0, /* unpack_bytes */
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0, /* pack_expression */
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0, /* notify_change */
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0, /* update_size */
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0, /* preferred_size */
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0, /* resize */
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0, /* nearest_smaller_value */
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0, /* next accessor */
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0, /* compare vs. another accessor */
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0, /* unpack only ith value (double) */
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0, /* unpack only ith value (float) */
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0, /* unpack a given set of elements (double) */
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0, /* unpack a given set of elements (float) */
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0, /* unpack a subarray */
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0, /* clear */
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0, /* clone accessor */
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};
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grib_accessor_class* grib_accessor_class_uint64 = &_grib_accessor_class_uint64;
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/* END_CLASS_IMP */
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static int unpack_long(grib_accessor* a, long* val, size_t* len)
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{
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long value = 0;
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long pos = a->offset;
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unsigned char* data = grib_handle_of_accessor(a)->buffer->data;
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unsigned long long result = 0, tmp;
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int i;
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if (*len < 1) {
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return GRIB_ARRAY_TOO_SMALL;
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}
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for (i = 0; i < 8; i++) {
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result <<= 8;
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result |= data[pos + i];
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}
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value = result;
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tmp = value;
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/* Result does not fit in long */
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if (tmp != result) {
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grib_context_log(a->context, GRIB_LOG_ERROR, "Value for %s cannot be decoded as a 'long' (%llu)", a->name, result);
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return GRIB_DECODING_ERROR;
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}
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*val = value;
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*len = 1;
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return GRIB_SUCCESS;
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}
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static int get_native_type(grib_accessor* a)
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{
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return GRIB_TYPE_LONG;
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}
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