mirror of https://github.com/ecmwf/eccodes.git
261 lines
8.2 KiB
C++
261 lines
8.2 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_long
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IMPLEMENTS = unpack_long;pack_long;
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IMPLEMENTS = unpack_double
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IMPLEMENTS = init
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MEMBERS=const char* array
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MEMBERS=long element
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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 pack_long(grib_accessor*, const long* val, size_t* len);
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static int unpack_double(grib_accessor*, double* val, size_t* len);
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static int unpack_long(grib_accessor*, long* val, size_t* len);
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static void init(grib_accessor*, const long, grib_arguments*);
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typedef struct grib_accessor_element
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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 long */
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/* Members defined in element */
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const char* array;
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long element;
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} grib_accessor_element;
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extern grib_accessor_class* grib_accessor_class_long;
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static grib_accessor_class _grib_accessor_class_element = {
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&grib_accessor_class_long, /* super */
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"element", /* name */
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sizeof(grib_accessor_element), /* size */
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0, /* inited */
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0, /* init_class */
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&init, /* 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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0, /* 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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&pack_long, /* 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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&unpack_double, /* 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_element = &_grib_accessor_class_element;
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/* END_CLASS_IMP */
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static void init(grib_accessor* a, const long l, grib_arguments* c)
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{
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grib_accessor_element* self = (grib_accessor_element*)a;
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grib_handle* hand = grib_handle_of_accessor(a);
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int n = 0;
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self->array = grib_arguments_get_name(hand, c, n++);
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self->element = grib_arguments_get_long(hand, c, n++);
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}
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static int check_element_index(const char* func, const char* array_name, long index, size_t size)
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{
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const grib_context* c = grib_context_get_default();
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if (index < 0 || index >= size) {
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grib_context_log(c, GRIB_LOG_ERROR, "%s: Invalid element index %ld for array '%s'. Value must be between 0 and %zu",
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func, index, array_name, size - 1);
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return GRIB_INVALID_ARGUMENT;
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}
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return GRIB_SUCCESS;
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}
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static int unpack_long(grib_accessor* a, long* val, size_t* len)
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{
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grib_accessor_element* self = (grib_accessor_element*)a;
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int ret = 0;
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size_t size = 0;
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long* ar = NULL;
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const grib_context* c = a->context;
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grib_handle* hand = grib_handle_of_accessor(a);
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long index = self->element;
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if (*len < 1) {
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ret = GRIB_ARRAY_TOO_SMALL;
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return ret;
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}
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if ((ret = grib_get_size(hand, self->array, &size)) != GRIB_SUCCESS)
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return ret;
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ar = (long*)grib_context_malloc_clear(c, size * sizeof(long));
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if (!ar) {
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grib_context_log(c, GRIB_LOG_ERROR, "Error allocating %zu bytes", size * sizeof(long));
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return GRIB_OUT_OF_MEMORY;
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}
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if ((ret = grib_get_long_array_internal(hand, self->array, ar, &size)) != GRIB_SUCCESS)
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return ret;
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// An index of -x means the xth item from the end of the list, so ar[-1] means the last item in ar
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if (index < 0) {
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index = size + index;
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}
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if ((ret = check_element_index(__func__, self->array, index, size)) != GRIB_SUCCESS) {
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goto the_end;
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}
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*val = ar[index];
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the_end:
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grib_context_free(c, ar);
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return ret;
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}
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static int pack_long(grib_accessor* a, const long* val, size_t* len)
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{
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grib_accessor_element* self = (grib_accessor_element*)a;
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int ret = 0;
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size_t size = 0;
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long* ar = NULL;
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const grib_context* c = a->context;
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grib_handle* hand = grib_handle_of_accessor(a);
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long index = self->element;
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if (*len < 1) {
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ret = GRIB_ARRAY_TOO_SMALL;
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return ret;
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}
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if ((ret = grib_get_size(hand, self->array, &size)) != GRIB_SUCCESS)
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return ret;
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ar = (long*)grib_context_malloc_clear(c, size * sizeof(long));
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if (!ar) {
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grib_context_log(c, GRIB_LOG_ERROR, "Error allocating %zu bytes", size * sizeof(long));
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return GRIB_OUT_OF_MEMORY;
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}
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if ((ret = grib_get_long_array_internal(hand, self->array, ar, &size)) != GRIB_SUCCESS)
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return ret;
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// An index of -x means the xth item from the end of the list, so ar[-1] means the last item in ar
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if (index < 0) {
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index = size + index;
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}
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if ((ret = check_element_index(__func__, self->array, index, size)) != GRIB_SUCCESS) {
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goto the_end;
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}
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Assert(index >= 0);
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Assert(index < size);
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ar[index] = *val;
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if ((ret = grib_set_long_array_internal(hand, self->array, ar, size)) != GRIB_SUCCESS)
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goto the_end;
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the_end:
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grib_context_free(c, ar);
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return ret;
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}
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static int unpack_double(grib_accessor* a, double* val, size_t* len)
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{
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grib_accessor_element* self = (grib_accessor_element*)a;
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int ret = 0;
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size_t size = 0;
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double* ar = NULL;
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const grib_context* c = a->context;
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const grib_handle* hand = grib_handle_of_accessor(a);
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long index = self->element;
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if (*len < 1) {
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ret = GRIB_ARRAY_TOO_SMALL;
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return ret;
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}
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if ((ret = grib_get_size(hand, self->array, &size)) != GRIB_SUCCESS)
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return ret;
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ar = (double*)grib_context_malloc_clear(c, size * sizeof(double));
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if (!ar) {
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grib_context_log(c, GRIB_LOG_ERROR, "Error allocating %zu bytes", size * sizeof(double));
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return GRIB_OUT_OF_MEMORY;
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}
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if ((ret = grib_get_double_array_internal(hand, self->array, ar, &size)) != GRIB_SUCCESS)
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return ret;
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// An index of -x means the xth item from the end of the list, so ar[-1] means the last item in ar
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if (index < 0) {
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index = size + index;
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}
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if ((ret = check_element_index(__func__, self->array, index, size)) != GRIB_SUCCESS) {
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goto the_end;
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}
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*val = ar[index];
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the_end:
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grib_context_free(c, ar);
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return ret;
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}
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