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