PostGIS  2.2.7dev-r@@SVN_REVISION@@
static LWLINE* lwline_from_gserialized_buffer ( uint8_t *  data_ptr,
uint8_t  g_flags,
size_t *  g_size 
)
static

Definition at line 1009 of file g_serialized.c.

References LWLINE::bbox, LWLINE::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_NDIMS, LINETYPE, lw_get_uint32_t(), lwalloc(), LWLINE::points, ptarray_construct(), ptarray_construct_reference_data(), LWLINE::srid, SRID_UNKNOWN, and LWLINE::type.

Referenced by lwgeom_from_gserialized_buffer().

1010 {
1011  uint8_t *start_ptr = data_ptr;
1012  LWLINE *line;
1013  uint32_t npoints = 0;
1014 
1015  assert(data_ptr);
1016 
1017  line = (LWLINE*)lwalloc(sizeof(LWLINE));
1018  line->srid = SRID_UNKNOWN; /* Default */
1019  line->bbox = NULL;
1020  line->type = LINETYPE;
1021  line->flags = g_flags;
1022 
1023  data_ptr += 4; /* Skip past the type. */
1024  npoints = lw_get_uint32_t(data_ptr); /* Zero => empty geometry */
1025  data_ptr += 4; /* Skip past the npoints. */
1026 
1027  if ( npoints > 0 )
1028  line->points = ptarray_construct_reference_data(FLAGS_GET_Z(g_flags), FLAGS_GET_M(g_flags), npoints, data_ptr);
1029 
1030  else
1031  line->points = ptarray_construct(FLAGS_GET_Z(g_flags), FLAGS_GET_M(g_flags), 0); /* Empty linestring */
1032 
1033  data_ptr += FLAGS_NDIMS(g_flags) * npoints * sizeof(double);
1034 
1035  if ( g_size )
1036  *g_size = data_ptr - start_ptr;
1037 
1038  return line;
1039 }
#define LINETYPE
Definition: liblwgeom.h:71
uint8_t type
Definition: liblwgeom.h:402
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:62
GBOX * bbox
Definition: liblwgeom.h:404
int32_t srid
Definition: liblwgeom.h:405
uint32_t lw_get_uint32_t(const uint8_t *loc)
Definition: lwgeom_api.c:569
#define SRID_UNKNOWN
Unknown SRID value.
Definition: liblwgeom.h:172
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:295
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:124
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:125
tuple g_size
Definition: genraster.py:41
void * lwalloc(size_t size)
Definition: lwutil.c:199
uint8_t flags
Definition: liblwgeom.h:403
#define FLAGS_NDIMS(flags)
Definition: liblwgeom.h:136
POINTARRAY * points
Definition: liblwgeom.h:406

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