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85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
#include "pc_api.h"
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#include "postgres.h"
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#include "utils/elog.h"
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/* Try to move these down */
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#include "utils/array.h"
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#include "utils/builtins.h" /* for pg_atoi */
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#include "lib/stringinfo.h" /* For binary input */
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#include "catalog/pg_type.h" /* for CSTRINGOID */
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#define POINTCLOUD_FORMATS "pointcloud_formats"
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#define POINTCLOUD_FORMATS_XML "schema"
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#define POINTCLOUD_FORMATS_SRID "srid"
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#define PG_GETARG_SERPOINT_P(datum) (SERIALIZED_POINT*)PG_DETOAST_DATUM(PG_GETARG_DATUM(datum))
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#define PG_GETARG_SERPATCH_P(datum) (SERIALIZED_PATCH*)PG_DETOAST_DATUM(PG_GETARG_DATUM(datum))
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/**
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* Serialized point type for clouds. Variable length, because there can be
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* an arbitrary number of dimensions. The pcid is a foreign key
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* reference to the POINTCLOUD_SCHEMAS table, where
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* the underlying structure of the data is described in XML,
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* the spatial reference system is indicated, and the data
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* packing scheme is indicated.
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*/
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typedef struct
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{
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uint32_t size;
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uint32_t pcid;
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uint8_t data[1];
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}
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SERIALIZED_POINT;
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/**
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* PgSQL patch type (collection of points) for clouds.
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* Variable length, because there can be
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* an arbitrary number of points encoded within.
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* The pcid is a foriegn key reference to the
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* POINTCLOUD_SCHEMAS table, where
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* the underlying structure of the data is described in XML,
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* the spatial reference system is indicated, and the data
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* packing scheme is indicated.
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*/
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typedef struct
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{
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uint32_t size;
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uint32_t pcid;
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uint32_t npoints;
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double xmin, xmax, ymin, ymax;
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uint8_t data[1];
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}
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SERIALIZED_PATCH;
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/* PGSQL / POINTCLOUD UTILITY FUNCTIONS */
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/** Look-up the PCID in the POINTCLOUD_FORMATS table, and construct a PC_SCHEMA from the XML therein */
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PCSCHEMA* pc_schema_get_by_id(uint32_t pcid);
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/** Turn a PCPOINT into a byte buffer suitable for saving in PgSQL */
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SERIALIZED_POINT* pc_point_serialize(const PCPOINT *pcpt);
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/** Turn a byte buffer into a PCPOINT for processing */
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PCPOINT* pc_point_deserialize(const SERIALIZED_POINT *serpt);
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/** Create a new readwrite PCPOINT from a hex string */
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PCPOINT* pc_point_from_hexwkb(const char *hexwkb, size_t hexlen);
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/** Create a hex representation of a PCPOINT */
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char* pc_point_to_hexwkb(const PCPOINT *pt);
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/** Turn a PCPATCH into a byte buffer suitable for saving in PgSQL */
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SERIALIZED_PATCH* pc_patch_serialize(const PCPATCH *patch);
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/** Turn a byte buffer into a PCPATCH for processing */
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PCPATCH* pc_patch_deserialize(const SERIALIZED_PATCH *serpatch);
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/** Create a new readwrite PCPATCH from a hex string */
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PCPATCH* pc_patch_from_hexwkb(const char *hexwkb, size_t hexlen);
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/** Create a hex representation of a PCPOINT */
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char* pc_patch_to_hexwkb(const PCPATCH *patch);
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