PostGIS  2.1.10dev-r@@SVN_REVISION@@
LWGEOM* wkt_parser_circularstring_new ( POINTARRAY pa,
char *  dimensionality 

Create a new circularstring.

Null point array implies empty. Null dimensionality implies no specified dimensionality in the WKT. Circular strings are just like linestrings, except with slighty different validity rules (minpoint == 3, numpoints % 2 == 1).

Definition at line 361 of file lwin_wkt.c.

References FLAGS_GET_M, FLAGS_GET_Z, global_parser_result, LW_FALSE, LW_PARSER_CHECK_MINPOINTS, LW_PARSER_CHECK_ODD, lwcircstring_as_lwgeom(), lwcircstring_construct(), lwcircstring_construct_empty(), LWDEBUG, POINTARRAY::npoints, struct_lwgeom_parser_result::parser_check_flags, PARSER_ERROR_MIXDIMS, PARSER_ERROR_MOREPOINTS, PARSER_ERROR_ODDPOINTS, ptarray_free(), SET_PARSER_ERROR, SRID_UNKNOWN, wkt_dimensionality(), and wkt_pointarray_dimensionality().

Referenced by yyparse().

362 {
363  uint8_t flags = wkt_dimensionality(dimensionality);
364  LWDEBUG(4,"entered");
366  /* No pointarray means it is empty */
367  if( ! pa )
370  /* If the number of dimensions is not consistent, we have a problem. */
371  if( wkt_pointarray_dimensionality(pa, flags) == LW_FALSE )
372  {
373  ptarray_free(pa);
375  return NULL;
376  }
378  /* Apply check for not enough points, if requested. */
380  {
381  ptarray_free(pa);
383  return NULL;
384  }
386  /* Apply check for odd number of points, if requested. */
388  {
389  ptarray_free(pa);
391  return NULL;
392  }
395 }
int npoints
Definition: liblwgeom.h:327
Parser check flags.
Definition: liblwgeom.h:1701
LWGEOM * lwcircstring_as_lwgeom(const LWCIRCSTRING *obj)
Definition: lwgeom.c:224
void ptarray_free(POINTARRAY *pa)
Definition: ptarray.c:315
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:50
LWGEOM_PARSER_RESULT global_parser_result
Definition: liblwgeom.h:1732
Definition: liblwgeom.h:1702
LWCIRCSTRING * lwcircstring_construct_empty(int srid, char hasz, char hasm)
Definition: lwcircstring.c:67
#define LW_FALSE
Definition: liblwgeom.h:52
static uint8_t wkt_dimensionality(char *dimensionality)
Definition: lwin_wkt.c:61
Unknown SRID value.
Definition: liblwgeom.h:154
Definition: liblwgeom.h:1729
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:106
LWCIRCSTRING * lwcircstring_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwcircstring.c:38
Definition: liblwgeom.h:1730
#define SET_PARSER_ERROR(errno)
Definition: lwin_wkt.c:38
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:107
static int wkt_pointarray_dimensionality(POINTARRAY *pa, uint8_t flags)
Read the dimensionality from a flag, if provided.
Definition: lwin_wkt.c:156

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