PostGIS  2.2.7dev-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 374 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().

375 {
376  uint8_t flags = wkt_dimensionality(dimensionality);
377  LWDEBUG(4,"entered");
378 
379  /* No pointarray means it is empty */
380  if( ! pa )
382 
383  /* If the number of dimensions is not consistent, we have a problem. */
384  if( wkt_pointarray_dimensionality(pa, flags) == LW_FALSE )
385  {
386  ptarray_free(pa);
388  return NULL;
389  }
390 
391  /* Apply check for not enough points, if requested. */
393  {
394  ptarray_free(pa);
396  return NULL;
397  }
398 
399  /* Apply check for odd number of points, if requested. */
401  {
402  ptarray_free(pa);
404  return NULL;
405  }
406 
408 }
int npoints
Definition: liblwgeom.h:355
#define LW_PARSER_CHECK_MINPOINTS
Parser check flags.
Definition: liblwgeom.h:1864
LWGEOM * lwcircstring_as_lwgeom(const LWCIRCSTRING *obj)
Definition: lwgeom.c:224
void ptarray_free(POINTARRAY *pa)
Definition: ptarray.c:330
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:50
LWGEOM_PARSER_RESULT global_parser_result
#define PARSER_ERROR_MIXDIMS
Definition: liblwgeom.h:1895
#define LW_PARSER_CHECK_ODD
Definition: liblwgeom.h:1865
LWCIRCSTRING * lwcircstring_construct_empty(int srid, char hasz, char hasm)
Definition: lwcircstring.c:67
#define LW_FALSE
Definition: liblwgeom.h:62
static uint8_t wkt_dimensionality(char *dimensionality)
Definition: lwin_wkt.c:61
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:172
#define PARSER_ERROR_MOREPOINTS
Definition: liblwgeom.h:1892
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:124
LWCIRCSTRING * lwcircstring_construct(int srid, GBOX *bbox, POINTARRAY *points)
Definition: lwcircstring.c:38
#define PARSER_ERROR_ODDPOINTS
Definition: liblwgeom.h:1893
#define SET_PARSER_ERROR(errno)
Definition: lwin_wkt.c:38
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:125
static int wkt_pointarray_dimensionality(POINTARRAY *pa, uint8_t flags)
Read the dimensionality from a flag, if provided.
Definition: lwin_wkt.c:169

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