mirror of https://github.com/ecmwf/eccodes.git
277 lines
9.5 KiB
C
277 lines
9.5 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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#include "md5.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 = get_native_type;init
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IMPLEMENTS = compare;unpack_string;value_count;destroy
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MEMBERS = const char* offset
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MEMBERS = grib_expression* length
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MEMBERS = grib_string_list* blocklist
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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_string(grib_accessor*, char*, size_t* len);
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static int value_count(grib_accessor*, long*);
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static void destroy(grib_context*, grib_accessor*);
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static void init(grib_accessor*, const long, grib_arguments*);
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static void init_class(grib_accessor_class*);
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static int compare(grib_accessor*, grib_accessor*);
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typedef struct grib_accessor_md5
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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 md5 */
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const char* offset;
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grib_expression* length;
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grib_string_list* blocklist;
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} grib_accessor_md5;
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extern grib_accessor_class* grib_accessor_class_gen;
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static grib_accessor_class _grib_accessor_class_md5 = {
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&grib_accessor_class_gen, /* super */
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"md5", /* name */
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sizeof(grib_accessor_md5), /* size */
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0, /* inited */
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&init_class, /* init_class */
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&init, /* init */
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0, /* post_init */
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&destroy, /* free mem */
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0, /* describes himself */
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0, /* get length of section */
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0, /* get length of string */
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&value_count, /* 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, /* grib_pack procedures long */
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0, /* grib_pack procedures long */
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0, /* grib_pack procedures long */
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0, /* grib_unpack procedures long */
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0, /* grib_pack procedures double */
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0, /* grib_unpack procedures double */
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0, /* grib_pack procedures string */
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&unpack_string, /* grib_unpack procedures string */
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0, /* grib_pack array procedures string */
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0, /* grib_unpack array procedures string */
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0, /* grib_pack procedures bytes */
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0, /* grib_unpack procedures 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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&compare, /* compare vs. another accessor */
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0, /* unpack only ith value */
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0, /* unpack a given set of elements */
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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_md5 = &_grib_accessor_class_md5;
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static void init_class(grib_accessor_class* c)
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{
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c->dump = (*(c->super))->dump;
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c->next_offset = (*(c->super))->next_offset;
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c->string_length = (*(c->super))->string_length;
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c->byte_count = (*(c->super))->byte_count;
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c->byte_offset = (*(c->super))->byte_offset;
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c->sub_section = (*(c->super))->sub_section;
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c->pack_missing = (*(c->super))->pack_missing;
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c->is_missing = (*(c->super))->is_missing;
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c->pack_long = (*(c->super))->pack_long;
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c->unpack_long = (*(c->super))->unpack_long;
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c->pack_double = (*(c->super))->pack_double;
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c->unpack_double = (*(c->super))->unpack_double;
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c->pack_string = (*(c->super))->pack_string;
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c->pack_string_array = (*(c->super))->pack_string_array;
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c->unpack_string_array = (*(c->super))->unpack_string_array;
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c->pack_bytes = (*(c->super))->pack_bytes;
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c->unpack_bytes = (*(c->super))->unpack_bytes;
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c->pack_expression = (*(c->super))->pack_expression;
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c->notify_change = (*(c->super))->notify_change;
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c->update_size = (*(c->super))->update_size;
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c->preferred_size = (*(c->super))->preferred_size;
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c->resize = (*(c->super))->resize;
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c->nearest_smaller_value = (*(c->super))->nearest_smaller_value;
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c->next = (*(c->super))->next;
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c->unpack_double_element = (*(c->super))->unpack_double_element;
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c->unpack_double_element_set = (*(c->super))->unpack_double_element_set;
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c->unpack_double_subarray = (*(c->super))->unpack_double_subarray;
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c->clear = (*(c->super))->clear;
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c->make_clone = (*(c->super))->make_clone;
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}
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/* END_CLASS_IMP */
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static void init(grib_accessor* a, const long len, grib_arguments* arg)
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{
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grib_accessor_md5* self = (grib_accessor_md5*)a;
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char* b = 0;
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int n = 0;
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grib_string_list* current = 0;
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grib_context* context = a->context;
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self->offset = grib_arguments_get_name(grib_handle_of_accessor(a), arg, n++);
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self->length = grib_arguments_get_expression(grib_handle_of_accessor(a), arg, n++);
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self->blocklist = NULL;
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while ((b = (char*)grib_arguments_get_name(grib_handle_of_accessor(a), arg, n++)) != NULL) {
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if (!self->blocklist) {
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self->blocklist = (grib_string_list*)grib_context_malloc_clear(context, sizeof(grib_string_list));
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self->blocklist->value = grib_context_strdup(context, b);
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current = self->blocklist;
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}
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else {
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Assert(current);
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if (current) {
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current->next = (grib_string_list*)grib_context_malloc_clear(context, sizeof(grib_string_list));
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current->next->value = grib_context_strdup(context, b);
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current = current->next;
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}
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}
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}
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a->length = 0;
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a->flags |= GRIB_ACCESSOR_FLAG_READ_ONLY;
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a->flags |= GRIB_ACCESSOR_FLAG_EDITION_SPECIFIC;
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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_STRING;
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}
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static int compare(grib_accessor* a, grib_accessor* b)
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{
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int retval = GRIB_SUCCESS;
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size_t alen = 0;
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size_t blen = 0;
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int err = 0;
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long count = 0;
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err = grib_value_count(a, &count);
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if (err)
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return err;
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alen = count;
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err = grib_value_count(b, &count);
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if (err)
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return err;
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blen = count;
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if (alen != blen)
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return GRIB_COUNT_MISMATCH;
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return retval;
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}
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static int unpack_string(grib_accessor* a, char* v, size_t* len)
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{
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grib_accessor_md5* self = (grib_accessor_md5*)a;
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unsigned mess_len;
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unsigned char* mess;
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unsigned char* p;
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long offset = 0, length = 0;
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grib_string_list* blocklist = NULL;
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grib_accessor* b = NULL;
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int ret = 0;
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int i = 0;
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struct grib_md5_state md5c;
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if (*len < 32) {
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grib_context_log(a->context, GRIB_LOG_ERROR, "md5: array too small");
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return GRIB_ARRAY_TOO_SMALL;
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}
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if ((ret = grib_get_long_internal(grib_handle_of_accessor(a), self->offset, &offset)) != GRIB_SUCCESS)
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return ret;
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if ((ret = grib_expression_evaluate_long(grib_handle_of_accessor(a), self->length, &length)) != GRIB_SUCCESS)
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return ret;
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mess = (unsigned char*)grib_context_malloc(a->context, length);
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memcpy(mess, grib_handle_of_accessor(a)->buffer->data + offset, length);
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mess_len = length;
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blocklist = a->context->blocklist;
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/* passed blocklist overrides context blocklist.
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Consider to modify following line to extend context blocklist.
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*/
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if (self->blocklist)
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blocklist = self->blocklist;
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while (blocklist && blocklist->value) {
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b = grib_find_accessor(grib_handle_of_accessor(a), blocklist->value);
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if (!b) {
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grib_context_free(a->context, mess);
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return GRIB_NOT_FOUND;
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}
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p = mess + b->offset - offset;
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for (i = 0; i < b->length; i++)
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*(p++) = 0;
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blocklist = blocklist->next;
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}
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grib_md5_init(&md5c);
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grib_md5_add(&md5c, mess, mess_len);
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grib_md5_end(&md5c, v);
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grib_context_free(a->context, mess);
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*len = strlen(v) + 1;
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return ret;
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}
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static void destroy(grib_context* c, grib_accessor* a)
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{
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grib_accessor_md5* self = (grib_accessor_md5*)a;
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if (self->blocklist) {
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grib_string_list* next = self->blocklist;
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grib_string_list* cur = NULL;
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while (next) {
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cur = next;
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next = next->next;
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grib_context_free(c, cur->value);
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grib_context_free(c, cur);
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}
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}
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}
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static int value_count(grib_accessor* a, long* count)
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{
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*count = 1; /* ECC-1475 */
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return 0;
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}
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