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added full support for fluffType(<geom>)

Browse source 
postgis09=# select fluffType('POINT(0 0)');
        flufftype
		-------------------------
		 SRID=-1;MULTIPOINT(0 0)


git-svn-id: http://svn.osgeo.org/postgis/trunk@493 b70326c6-7e19-0410-871a-916f4a2858ee
This commit is contained in:
David Blasby 2004-03-26 00:54:09 +00:00
parent ec09eba92d
commit 5512d40413
3 changed files with 67 additions and 17 deletions
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15
Attic/postgis_sql_common.sql.in
View file

@ -12,6 +12,13 @@
--
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-- $Log$
-- Revision 1.28 2004/03/26 00:54:09 dblasby
-- added full support for fluffType(<geom>)
-- postgis09=# select fluffType('POINT(0 0)');
-- flufftype
-- -------------------------
-- SRID=-1;MULTIPOINT(0 0)
--
-- Revision 1.27 2004/01/21 19:04:03 strk
-- Added line_interpolate_point function by jsunday@rochgrp.com
--
@ -776,7 +783,12 @@ CREATE FUNCTION distance_spheroid(geometry,geometry,spheroid)
--
-- Generic operations
--
CREATE FUNCTION fluffType(geometry)
RETURNS geometry
AS '@MODULE_FILENAME@','fluffType'
LANGUAGE 'C' WITH (isstrict);
CREATE FUNCTION length3d(geometry)
RETURNS FLOAT8
AS '@MODULE_FILENAME@'
@ -847,6 +859,7 @@ CREATE FUNCTION pointonsurface(geometry)
AS '@MODULE_FILENAME@'
LANGUAGE 'C' WITH (isstrict);
--
-- BBox operations

9
postgis.h
View file

@ -11,6 +11,13 @@
*
**********************************************************************
* $Log$
* Revision 1.43 2004/03/26 00:54:09 dblasby
* added full support for fluffType(<geom>)
* postgis09=# select fluffType('POINT(0 0)');
* flufftype
* -------------------------
* SRID=-1;MULTIPOINT(0 0)
*
* Revision 1.42 2004/02/23 12:18:55 strk
* added skeleton functions for pg75 stats integration
*
@ -650,6 +657,8 @@ Datum isempty(PG_FUNCTION_ARGS);
Datum simplify(PG_FUNCTION_ARGS);
Datum line_interpolate_point(PG_FUNCTION_ARGS);
Datum fluffType(PG_FUNCTION_ARGS);
/*--------------------------------------------------------------------
* Useful floating point utilities and constants.
* from postgres geo_decls.c

60
postgis_fn.c
View file

@ -11,6 +11,13 @@
*
**********************************************************************
* $Log$
* Revision 1.34 2004/03/26 00:54:09 dblasby
* added full support for fluffType(<geom>)
* postgis09=# select fluffType('POINT(0 0)');
* flufftype
* -------------------------
* SRID=-1;MULTIPOINT(0 0)
*
* Revision 1.33 2004/03/25 00:43:41 dblasby
* added function fluffType() that takes POINT LINESTRING or POLYGON
* type and converts it to a multi*.
@ -3043,24 +3050,45 @@ void compressType(GEOMETRY *g)
}
}
// converts single-type (point,linestring,polygon)
// to multi* types with 1 element
// ie. POINT(0 0) --> MULTIPOINT(0 0)
void fluffType(GEOMETRY *g)
//
//postgis09=# select fluffType('POINT(0 0)');
// flufftype
//-------------------------
// SRID=-1;MULTIPOINT(0 0)
//(1 row)
//
//postgis09=# select fluffType('LINESTRING(0 0, 1 1)');
// flufftype
//------------------------------------
// SRID=-1;MULTILINESTRING((0 0,1 1))
//(1 row)
PG_FUNCTION_INFO_V1(fluffType);
Datum fluffType(PG_FUNCTION_ARGS)
{
if (g->type == POINTTYPE)
{
g->type = MULTIPOINTTYPE;
return;
}
if (g->type == LINETYPE)
{
g->type = MULTILINETYPE;
return;
}
if (g->type == POLYGONTYPE)
{
g->type = MULTIPOLYGONTYPE;
return;
}
GEOMETRY *geom1= (GEOMETRY *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
GEOMETRY *g;
g = (GEOMETRY*) palloc( *((int *) geom1) );
memcpy(g,geom1, *((int *) geom1));
if (g->type == POINTTYPE)
{
g->type = MULTIPOINTTYPE;
}
if (g->type == LINETYPE)
{
g->type = MULTILINETYPE;
}
if (g->type == POLYGONTYPE)
{
g->type = MULTIPOLYGONTYPE;
}
PG_FREE_IF_COPY(geom1,0);
PG_RETURN_POINTER(g);
}