#include <assert.h>
#include <stdlib.h>

#include "levenshtein.h"


size_t** create_distance_matrix(size_t rows, size_t cols)
{
	// Create an array of pointers to rows
	size_t** matrix = (size_t**) calloc(rows, sizeof(size_t*));
	if ( matrix == NULL )
		return NULL;

	// Create each row
	for ( size_t row = 0; row < rows; ++row )
		if ( (matrix[row] = (size_t*) malloc(cols * sizeof(size_t))) == NULL )
			return NULL;

	// Done
	return matrix;
}

void destroy_distance_matrix(size_t** matrix, size_t rows)
{
	for ( size_t row = 0; row < rows; ++row )
		free( matrix[row] );
	free(matrix);
}