mirror of
https://git.osgeo.org/gitea/postgis/postgis
synced 2024-10-25 17:42:38 +00:00
444 lines
10 KiB
C
444 lines
10 KiB
C
#include "postgres.h"
|
|
|
|
#include <math.h>
|
|
#include <float.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "access/gist.h"
|
|
#include "access/itup.h"
|
|
#include "access/rtree.h"
|
|
|
|
#include "fmgr.h"
|
|
#include "utils/elog.h"
|
|
#if USE_VERSION > 73
|
|
# include "lib/stringinfo.h" // for binary input
|
|
#endif
|
|
|
|
|
|
#include "liblwgeom.h"
|
|
#include "stringBuffer.h"
|
|
|
|
|
|
//#define DEBUG
|
|
|
|
#include "lwgeom_pg.h"
|
|
#include "wktparse.h"
|
|
|
|
void elog_ERROR(const char* string);
|
|
|
|
|
|
// needed for OGC conformance
|
|
Datum LWGEOMFromWKB(PG_FUNCTION_ARGS);
|
|
Datum WKBFromLWGEOM(PG_FUNCTION_ARGS);
|
|
Datum LWGEOM_in(PG_FUNCTION_ARGS);
|
|
Datum LWGEOM_out(PG_FUNCTION_ARGS);
|
|
Datum LWGEOM_addBBOX(PG_FUNCTION_ARGS);
|
|
Datum LWGEOM_getBBOX(PG_FUNCTION_ARGS);
|
|
Datum parse_WKT_lwgeom(PG_FUNCTION_ARGS);
|
|
#if USE_VERSION > 73
|
|
Datum LWGEOM_recv(PG_FUNCTION_ARGS);
|
|
#endif
|
|
|
|
|
|
// included here so we can be independent from postgis
|
|
// WKB structure -- exactly the same as TEXT
|
|
typedef struct Well_known_bin {
|
|
int32 size; // total size of this structure
|
|
unsigned char data[1]; //THIS HOLD VARIABLE LENGTH DATA
|
|
} WellKnownBinary;
|
|
|
|
|
|
|
|
|
|
|
|
// LWGEOM_in(cstring)
|
|
// format is '[SRID=#;]wkt|wkb'
|
|
// LWGEOM_in( 'SRID=99;POINT(0 0)')
|
|
// LWGEOM_in( 'POINT(0 0)') --> assumes SRID=-1
|
|
// LWGEOM_in( 'SRID=99;0101000000000000000000F03F000000000000004')
|
|
// returns a PG_LWGEOM object
|
|
PG_FUNCTION_INFO_V1(LWGEOM_in);
|
|
Datum LWGEOM_in(PG_FUNCTION_ARGS)
|
|
{
|
|
char *str = PG_GETARG_CSTRING(0);
|
|
char *semicolonLoc,start;
|
|
|
|
//determine if its WKB or WKT
|
|
|
|
semicolonLoc = strchr(str,';');
|
|
if (semicolonLoc == NULL)
|
|
{
|
|
start=str[0];
|
|
}
|
|
else
|
|
{
|
|
start=semicolonLoc[1]; // one in
|
|
}
|
|
|
|
// this is included just for redundancy (new parser can handle wkt and wkb)
|
|
|
|
if ( ( (start >= '0') && (start <= '9') ) ||
|
|
( (start >= 'A') && (start <= 'F') ))
|
|
{
|
|
//its WKB
|
|
//PG_RETURN_POINTER(parse_lwgeom_serialized_form(str));
|
|
// this function handles wkt and wkb (in hex-form)
|
|
PG_RETURN_POINTER( parse_lwgeom_wkt(str) );
|
|
}
|
|
else if ( (start == 'P') || (start == 'L') || (start == 'M') ||
|
|
(start == 'G') || (start == 'p') || (start == 'l') ||
|
|
(start == 'm') || (start == 'g'))
|
|
{
|
|
// its WKT
|
|
// this function handles wkt and wkb (in hex-form)
|
|
PG_RETURN_POINTER( parse_lwgeom_wkt(str) );
|
|
}
|
|
else
|
|
{
|
|
elog(ERROR,"couldnt determine if input lwgeom is WKB or WKT");
|
|
PG_RETURN_NULL();
|
|
}
|
|
}
|
|
|
|
|
|
// LWGEOM_out(lwgeom) --> cstring
|
|
// output is 'SRID=#;<wkb in hex form>'
|
|
// ie. 'SRID=-99;0101000000000000000000F03F0000000000000040'
|
|
// WKB is machine endian
|
|
// if SRID=-1, the 'SRID=-1;' will probably not be present.
|
|
PG_FUNCTION_INFO_V1(LWGEOM_out);
|
|
Datum LWGEOM_out(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_LWGEOM *lwgeom;
|
|
char *result;
|
|
|
|
init_pg_func();
|
|
|
|
lwgeom = (PG_LWGEOM *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
|
|
result = unparse_WKB(SERIALIZED_FORM(lwgeom),lwalloc,lwfree,-1);
|
|
|
|
PG_RETURN_CSTRING(result);
|
|
}
|
|
|
|
// LWGEOM_to_text(lwgeom) --> text
|
|
// output is 'SRID=#;<wkb in hex form>'
|
|
// ie. 'SRID=-99;0101000000000000000000F03F0000000000000040'
|
|
// WKB is machine endian
|
|
// if SRID=-1, the 'SRID=-1;' will probably not be present.
|
|
PG_FUNCTION_INFO_V1(LWGEOM_to_text);
|
|
Datum LWGEOM_to_text(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_LWGEOM *lwgeom;
|
|
char *result;
|
|
text *text_result;
|
|
|
|
init_pg_func();
|
|
|
|
lwgeom = (PG_LWGEOM *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
|
|
result = unparse_WKB(SERIALIZED_FORM(lwgeom),lwalloc,lwfree,-1);
|
|
|
|
text_result = palloc(strlen(result)+VARHDRSZ);
|
|
memcpy(VARDATA(text_result),result,strlen(result));
|
|
VARATT_SIZEP(text_result) = strlen(result)+VARHDRSZ;
|
|
pfree(result);
|
|
|
|
PG_RETURN_POINTER(text_result);
|
|
}
|
|
|
|
|
|
|
|
// LWGEOMFromWKB(wkb, [SRID] )
|
|
// NOTE: wkb is in *binary* not hex form.
|
|
//
|
|
// NOTE: this function is unoptimized, as it convert binary
|
|
// form to hex form and then calls the unparser ...
|
|
//
|
|
PG_FUNCTION_INFO_V1(LWGEOMFromWKB);
|
|
Datum LWGEOMFromWKB(PG_FUNCTION_ARGS)
|
|
{
|
|
WellKnownBinary *wkb_input;
|
|
char *wkb_srid_hexized;
|
|
int size_result,size_header;
|
|
int SRID = -1;
|
|
char sridText[100];
|
|
char *loc;
|
|
PG_LWGEOM *lwgeom;
|
|
int t;
|
|
|
|
wkb_input = (WellKnownBinary *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
|
|
|
|
if ( ( PG_NARGS()>1) && ( ! PG_ARGISNULL(1) ))
|
|
SRID = PG_GETARG_INT32(1);
|
|
else
|
|
SRID = -1;
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE,"LWGEOMFromWKB: entry with SRID=%i",SRID);
|
|
#endif
|
|
|
|
// convert WKB to hexized WKB string
|
|
|
|
size_header = sprintf(sridText,"SRID=%i;",SRID);
|
|
//SRID text size + wkb size (+1 = NULL term)
|
|
size_result = size_header + 2*(wkb_input->size -4) + 1;
|
|
|
|
wkb_srid_hexized = palloc(size_result);
|
|
wkb_srid_hexized[0] = 0; // empty
|
|
strcpy(wkb_srid_hexized, sridText);
|
|
loc = wkb_srid_hexized + size_header; // points to null in "SRID=#;"
|
|
|
|
for (t=0; t< (wkb_input->size -4); t++)
|
|
{
|
|
deparse_hex( ((unsigned char *) wkb_input)[4 + t], &loc[t*2]);
|
|
}
|
|
|
|
wkb_srid_hexized[size_result-1] = 0; // null term
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE,"size_header = %i",size_header);
|
|
elog(NOTICE,"size_result = %i", size_result);
|
|
elog(NOTICE,"LWGEOMFromWKB :: '%s'", wkb_srid_hexized);
|
|
#endif
|
|
|
|
lwgeom = (PG_LWGEOM *)parse_lwgeom_wkt(wkb_srid_hexized);
|
|
|
|
pfree(wkb_srid_hexized);
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOMFromWKB returning %s", unparse_WKB(SERIALIZED_FORM(lwgeom), pg_alloc, pg_free, -1));
|
|
#endif
|
|
|
|
PG_RETURN_POINTER(lwgeom);
|
|
}
|
|
|
|
// WKBFromLWGEOM(lwgeom) --> wkb
|
|
// this will have no 'SRID=#;'
|
|
PG_FUNCTION_INFO_V1(WKBFromLWGEOM);
|
|
Datum WKBFromLWGEOM(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_LWGEOM *lwgeom_input; // SRID=#;<hexized wkb>
|
|
char *hexized_wkb_srid;
|
|
char *hexized_wkb; // hexized_wkb_srid w/o srid
|
|
char *result; //wkb
|
|
int len_hexized_wkb;
|
|
int size_result;
|
|
char *semicolonLoc;
|
|
int t;
|
|
text *type;
|
|
unsigned int byteorder=-1;
|
|
|
|
init_pg_func();
|
|
|
|
if ( (PG_NARGS()>1) && (!PG_ARGISNULL(1)) )
|
|
{
|
|
type = PG_GETARG_TEXT_P(1);
|
|
if (VARSIZE(type) < 7)
|
|
{
|
|
elog(ERROR,"asbinary(geometry, <type>) - type should be 'XDR' or 'NDR'. type length is %i",VARSIZE(type) -4);
|
|
PG_RETURN_NULL();
|
|
}
|
|
|
|
if ( ! strncmp(VARDATA(type), "xdr", 3) ||
|
|
! strncmp(VARDATA(type), "XDR", 3) )
|
|
{
|
|
byteorder = BIG_ENDIAN;
|
|
}
|
|
else
|
|
{
|
|
byteorder = LITTLE_ENDIAN;
|
|
}
|
|
}
|
|
|
|
lwgeom_input = (PG_LWGEOM *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
|
|
hexized_wkb_srid = unparse_WKB(SERIALIZED_FORM(lwgeom_input),
|
|
lwalloc, lwfree, byteorder);
|
|
|
|
//elog(NOTICE, "in WKBFromLWGEOM with WKB = '%s'", hexized_wkb_srid);
|
|
|
|
hexized_wkb = hexized_wkb_srid;
|
|
semicolonLoc = strchr(hexized_wkb_srid,';');
|
|
|
|
|
|
if (semicolonLoc != NULL)
|
|
{
|
|
hexized_wkb = (semicolonLoc+1);
|
|
}
|
|
|
|
//elog(NOTICE, "in WKBFromLWGEOM with WKB (with no 'SRID=#;' = '%s'", hexized_wkb);
|
|
|
|
len_hexized_wkb = strlen(hexized_wkb);
|
|
size_result = len_hexized_wkb/2 + 4;
|
|
result = palloc(size_result);
|
|
|
|
memcpy(result, &size_result,4); // size header
|
|
|
|
// have a hexized string, want to make it binary
|
|
for (t=0; t< (len_hexized_wkb/2); t++)
|
|
{
|
|
((unsigned char *) result +4)[t] = parse_hex( hexized_wkb + (t*2) );
|
|
}
|
|
|
|
pfree(hexized_wkb_srid);
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
|
|
|
|
// puts a bbox inside the geometry
|
|
PG_FUNCTION_INFO_V1(LWGEOM_addBBOX);
|
|
Datum LWGEOM_addBBOX(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_LWGEOM *lwgeom = (PG_LWGEOM *)PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
|
|
PG_LWGEOM *result;
|
|
BOX2DFLOAT4 box;
|
|
unsigned char old_type;
|
|
int size;
|
|
|
|
//elog(NOTICE,"in LWGEOM_addBBOX");
|
|
|
|
if (lwgeom_hasBBOX( lwgeom->type ) )
|
|
{
|
|
//elog(NOTICE,"LWGEOM_addBBOX -- already has bbox");
|
|
// easy - already has one. Just copy!
|
|
result = palloc (lwgeom->size);
|
|
memcpy(result, lwgeom, lwgeom->size);
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
//elog(NOTICE,"LWGEOM_addBBOX -- giving it a bbox");
|
|
|
|
//construct new one
|
|
getbox2d_p(SERIALIZED_FORM(lwgeom), &box);
|
|
old_type = lwgeom->type;
|
|
|
|
size = lwgeom->size+sizeof(BOX2DFLOAT4);
|
|
|
|
result = palloc(size);// 16 for bbox2d
|
|
|
|
memcpy(result,&size,4); // size
|
|
result->type = lwgeom_makeType_full(
|
|
TYPE_HASZ(old_type),
|
|
TYPE_HASM(old_type),
|
|
lwgeom_hasSRID(old_type), lwgeom_getType(old_type), 1);
|
|
// copy in bbox
|
|
memcpy(result->data, &box, sizeof(BOX2DFLOAT4));
|
|
|
|
//lwnotice("result->type hasbbox: %d", TYPE_HASBBOX(result->type));
|
|
|
|
//elog(NOTICE,"LWGEOM_addBBOX -- about to copy serialized form");
|
|
// everything but the type and length
|
|
memcpy(result->data+sizeof(BOX2DFLOAT4), lwgeom->data, lwgeom->size-5);
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
|
|
//for the wkt parser
|
|
|
|
void elog_ERROR(const char* string)
|
|
{
|
|
elog(ERROR,string);
|
|
}
|
|
|
|
// parse WKT input
|
|
// parse_WKT_lwgeom(TEXT) -> LWGEOM
|
|
PG_FUNCTION_INFO_V1(parse_WKT_lwgeom);
|
|
Datum parse_WKT_lwgeom(PG_FUNCTION_ARGS)
|
|
{
|
|
const char *wkt_input = (char *) PG_DETOAST_DATUM(PG_GETARG_DATUM(0)); // text
|
|
char *serialized_form; //with length
|
|
char *wkt;
|
|
int wkt_size ;
|
|
|
|
|
|
init_pg_func();
|
|
|
|
wkt_size = (*(int*) wkt_input) -4; // actual letters
|
|
|
|
wkt = palloc( wkt_size+1); //+1 for null
|
|
memcpy(wkt, wkt_input+4, wkt_size );
|
|
wkt[wkt_size] = 0; // null term
|
|
|
|
|
|
//elog(NOTICE,"in parse_WKT_lwgeom");
|
|
//elog(NOTICE,"in parse_WKT_lwgeom with input: '%s'",wkt);
|
|
|
|
serialized_form = parse_lwg((const char *)wkt, (allocator)lwalloc, (report_error)elog_ERROR);
|
|
//elog(NOTICE,"parse_WKT_lwgeom:: finished parse");
|
|
pfree (wkt);
|
|
|
|
if (serialized_form == NULL)
|
|
elog(ERROR,"parse_WKT:: couldnt parse!");
|
|
|
|
|
|
|
|
// printBYTES(serialized_form+4,*((int*) serialized_form)-4);
|
|
|
|
// result = palloc( (*((int*) serialized_form)));
|
|
// memcpy(result, serialized_form, *((int*) serialized_form));
|
|
// free(serialized_form);
|
|
|
|
// PG_RETURN_POINTER(result);
|
|
//PG_RETURN_NULL();
|
|
|
|
PG_RETURN_POINTER(serialized_form);
|
|
}
|
|
|
|
|
|
#if USE_VERSION > 73
|
|
/*
|
|
* This function must advance the StringInfo.cursor pointer
|
|
* and leave it at the end of StringInfo.buf. If it fails
|
|
* to do so the backend will raise an exception with message:
|
|
* ERROR: incorrect binary data format in bind parameter #
|
|
*
|
|
*/
|
|
PG_FUNCTION_INFO_V1(LWGEOM_recv);
|
|
Datum LWGEOM_recv(PG_FUNCTION_ARGS)
|
|
{
|
|
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
|
|
bytea *wkb;
|
|
PG_LWGEOM *result;
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOM_recv start");
|
|
#endif
|
|
|
|
/* Add VARLENA size info to make it a valid varlena object */
|
|
wkb = (bytea *)palloc(buf->len+VARHDRSZ);
|
|
VARATT_SIZEP(wkb) = buf->len+VARHDRSZ;
|
|
memcpy(VARATT_DATA(wkb), buf->data, buf->len);
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOM_recv calling LWGEOMFromWKB");
|
|
#endif
|
|
|
|
/* Call slow LWGEOMFromWKB function... */
|
|
result = (PG_LWGEOM *)DatumGetPointer(DirectFunctionCall1(LWGEOMFromWKB,
|
|
PointerGetDatum(wkb)));
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOM_recv advancing StringInfo buffer");
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOMFromWKB returned %s", unparse_WKB(SERIALIZED_FORM(result),pg_alloc,pg_free));
|
|
#endif
|
|
|
|
|
|
/* Set cursor to the end of buffer (so the backend is happy) */
|
|
buf->cursor = buf->len;
|
|
|
|
#ifdef DEBUG
|
|
elog(NOTICE, "LWGEOM_recv returning");
|
|
#endif
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
#endif
|