lwin_twkb.c File Reference

#include <math.h>
#include "liblwgeom_internal.h"
#include "lwgeom_log.h"
#include "varint.h"

Include dependency graph for lwin_twkb.c:

Go to the source code of this file.

Data Structures
struct	twkb_parse_state
	Used for passing the parse state between the parsing functions. More...

Macros
#define	TWKB_IN_MAXCOORDS   4

Functions
LWGEOM *	lwgeom_from_twkb_state (twkb_parse_state *s)
	Internal function declarations.
static void	twkb_parse_state_advance (twkb_parse_state *s, size_t next)
	Check that we are not about to read off the end of the WKB array.
static int64_t	twkb_parse_state_varint (twkb_parse_state *s)
static uint64_t	twkb_parse_state_uvarint (twkb_parse_state *s)
static double	twkb_parse_state_double (twkb_parse_state *s, double factor)
static void	twkb_parse_state_varint_skip (twkb_parse_state *s)
static uint32_t	lwtype_from_twkb_type (uint8_t twkb_type)
static uint8_t	byte_from_twkb_state (twkb_parse_state *s)
	Byte Read a byte and advance the parse state forward.
static POINTARRAY *	ptarray_from_twkb_state (twkb_parse_state *s, uint32_t npoints)
	POINTARRAY Read a dynamically sized point array and advance the parse state forward.
static LWPOINT *	lwpoint_from_twkb_state (twkb_parse_state *s)
	POINT.
static LWLINE *	lwline_from_twkb_state (twkb_parse_state *s)
	LINESTRING.
static LWPOLY *	lwpoly_from_twkb_state (twkb_parse_state *s)
	POLYGON.
static LWCOLLECTION *	lwmultipoint_from_twkb_state (twkb_parse_state *s)
	MULTIPOINT.
static LWCOLLECTION *	lwmultiline_from_twkb_state (twkb_parse_state *s)
	MULTILINESTRING.
static LWCOLLECTION *	lwmultipoly_from_twkb_state (twkb_parse_state *s)
	MULTIPOLYGON.
static LWCOLLECTION *	lwcollection_from_twkb_state (twkb_parse_state *s)
	COLLECTION, MULTIPOINTTYPE, MULTILINETYPE, MULTIPOLYGONTYPE.
static void	header_from_twkb_state (twkb_parse_state *s)
LWGEOM *	lwgeom_from_twkb (const uint8_t *twkb, size_t twkb_size, char check)
	WKB inputs must have a declared size, to prevent malformed WKB from reading off the end of the memory segment (this stops a malevolent user from declaring a one-ring polygon to have 10 rings, causing the WKB reader to walk off the end of the memory).