array_indexer.c 1.69 KB
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/****************************************************************************
 * Array indexing functions                                                  *
 ****************************************************************************/

/**
 * @file array_indexer.c
 * @author Celine Mercier
 * @date October 5th 2017
 * @brief Functions handling the indexing and retrieval of arrays of any type.
 */


#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <math.h>

#include "obiblob.h"
#include "obiblob_indexer.h"
#include "obidebug.h"
#include "obitypes.h"


#define DEBUG_LEVEL 0	// TODO has to be defined somewhere else (cython compil flag?)


index_t obi_index_array(Obi_indexer_p indexer, const void* value, uint8_t elt_size, int value_length)
{
	Obi_blob_p  value_b;
	index_t 	idx;
	int32_t     length_bytes;

//	fprintf(stderr, "\nelt size in C: %u", elt_size);

//	for (int i=0; i<value_length; i++)
//		fprintf(stderr, "\nvalue %d", ((obibool_t*)value)[i]);

	length_bytes = value_length * elt_size;

	// Encode value
	value_b = obi_blob((byte_t*)value, elt_size, length_bytes, length_bytes);
	if (value_b == NULL)
		return -1;

//	for (int i=0; i<value_length; i++)
//		fprintf(stderr, "\nin blob: value %d", ((obibool_t*)(value_b->value))[i]);

	// Add in the indexer
	idx = obi_indexer_add(indexer, value_b);

	free(value_b);

	return idx;
}


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const void* obi_retrieve_array(Obi_indexer_p indexer, index_t idx, int32_t* value_length_p)
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{
	Obi_blob_p  value_b;

	// Get encoded value
	value_b = obi_indexer_get(indexer, idx);

	// Store array length
	*value_length_p = (value_b->length_decoded_value) / (value_b->element_size);

	// Return pointer on mapped array
	return ((void*) (value_b->value));
}