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#include <math.h>
#include <quad_tile.h>
#include <postgres.h>
#include <fmgr.h>
Datum
tile_for_point(PG_FUNCTION_ARGS)
{
double lat = PG_GETARG_INT32(0) / 10000000.0;
double lon = PG_GETARG_INT32(1) / 10000000.0;
PG_RETURN_INT64(xy2tile(lon2x(lon), lat2y(lat)));
}
PG_FUNCTION_INFO_V1(tile_for_point);
/*
* To bind this into PGSQL, try something like:
*
* CREATE FUNCTION tile_for_point(int4, int4) RETURNS int8
* AS '/path/to/rails-port/db/functions/libpgosm', 'tile_for_point'
* LANGUAGE C STRICT;
*
* (without all the *s)
*/