PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwpoint_from_gserialized2_buffer()

static LWPOINT* lwpoint_from_gserialized2_buffer ( uint8_t *  data_ptr,
lwflags_t  lwflags,
size_t *  size,
int32_t  srid 
)
static

Definition at line 1213 of file gserialized2.c.

1214 {
1215  uint8_t *start_ptr = data_ptr;
1216  LWPOINT *point;
1217  uint32_t npoints = 0;
1218 
1219  assert(data_ptr);
1220 
1221  point = (LWPOINT*)lwalloc(sizeof(LWPOINT));
1222  point->srid = srid;
1223  point->bbox = NULL;
1224  point->type = POINTTYPE;
1225  point->flags = lwflags;
1226 
1227  data_ptr += 4; /* Skip past the type. */
1228  npoints = gserialized2_get_uint32_t(data_ptr); /* Zero => empty geometry */
1229  data_ptr += 4; /* Skip past the npoints. */
1230 
1231  if (npoints > 0)
1233  else
1234  point->point = ptarray_construct(FLAGS_GET_Z(lwflags), FLAGS_GET_M(lwflags), 0); /* Empty point */
1235 
1236  data_ptr += npoints * FLAGS_NDIMS(lwflags) * sizeof(double);
1237 
1238  if (size)
1239  *size = data_ptr - start_ptr;
1240 
1241  return point;
1242 }
static uint32_t gserialized2_get_uint32_t(const uint8_t *loc)
Definition: gserialized2.c:131
POINTARRAY * ptarray_construct_reference_data(char hasz, char hasm, uint32_t npoints, uint8_t *ptlist)
Construct a new POINTARRAY, referencing to the data from ptlist.
Definition: ptarray.c:291
POINTARRAY * ptarray_construct(char hasz, char hasm, uint32_t npoints)
Construct an empty pointarray, allocating storage and setting the npoints, but not filling in any inf...
Definition: ptarray.c:51
#define POINTTYPE
LWTYPE numbers, used internally by PostGIS.
Definition: liblwgeom.h:116
#define FLAGS_GET_Z(flags)
Definition: liblwgeom.h:179
#define FLAGS_NDIMS(flags)
Definition: liblwgeom.h:193
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:180
void * lwalloc(size_t size)
Definition: lwutil.c:227
lwflags_t lwflags(int hasz, int hasm, int geodetic)
Construct a new flags bitmask.
Definition: lwutil.c:471
POINTARRAY * point
Definition: liblwgeom.h:485
uint8_t type
Definition: liblwgeom.h:488
lwflags_t flags
Definition: liblwgeom.h:487
GBOX * bbox
Definition: liblwgeom.h:484
int32_t srid
Definition: liblwgeom.h:486

References LWPOINT::bbox, LWPOINT::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_NDIMS, gserialized2_get_uint32_t(), lwalloc(), lwflags(), LWPOINT::point, POINTTYPE, ptarray_construct(), ptarray_construct_reference_data(), LWPOINT::srid, and LWPOINT::type.

Referenced by lwgeom_from_gserialized2_buffer().

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