first attempt at wkb definitions

git-svn-id: http://svn.osgeo.org/postgis/trunk@387 b70326c6-7e19-0410-871a-916f4a2858ee

diff --git a/loader/wkb.h b/loader/wkb.h
new file mode 100644 (file)
index 0000000..044970e
--- /dev/null
+++ b/loader/wkb.h
@@ -0,0 +1,98 @@
+/*
+ * OGC WellKnownBinaryGeometry
+ */
+
+/*
+ * 3d geometries are encode as in OGR by adding WKB3DOFFSET to the type.  
+ */
+#define WKB3DOFFSET 0x80000000
+
+typedef char byte;
+typedef unsigned int uint32;
+
+typedef struct Point_t {
+       double x;
+       double y;
+       double z;
+} Point;
+
+typedef struct LinearRing_t {
+       uint32    numPoints;
+       Point    points[1]; // [numPoints]
+} LinearRing; 
+
+enum wkbGeometryType {
+       wkbPoint = 1,
+       wkbLineString = 2,
+       wkbPolygon = 3,
+       wkbMultiPoint = 4,
+       wkbMultiLineString = 5,
+       wkbMultiPolygon = 6,
+       wkbGeometryCollection = 7
+};
+
+enum wkbByteOrder {
+       wkbXDR = 0,    // Big Endian
+       wkbNDR = 1    // Little Endian
+};
+
+typedef struct WKBPoint_t {
+       byte    byteOrder;
+       uint32    wkbType;     // 1
+       Point    point;
+} WKBPoint;
+
+typedef struct WKBLineString_t {
+       byte    byteOrder;
+       uint32    wkbType;    // 2
+       uint32    numPoints;
+       Point    points[1]; // [numPoints]
+} WKBLineString;
+
+typedef struct WKBPolygon_t {
+       byte    byteOrder;
+       uint32    wkbType;    // 3
+       uint32    numRings;
+       LinearRing    rings[1]; // [numRings]
+} WKBPolygon;
+
+typedef struct WKBMultiPoint_t {
+       byte    byteOrder;
+       uint32    wkbType;       // 4
+       uint32    num_wkbPoints;
+       WKBPoint    WKBPoints[1]; // [num_wkbPoints];
+} WKBMultiPoint;
+
+typedef struct WKBMultiLineString_t {
+       byte    byteOrder;
+       uint32    wkbType;    // 5
+       uint32    num_wkbLineStrings;
+       WKBLineString    WKBLineStrings[1]; // [num_wkbLineStrings];
+} WKBMultiLineString;
+
+typedef struct WKBMultiPolygon_t {
+       byte    byteOrder;
+       uint32    wkbType;    // 6
+       uint32    num_wkbPolygons;
+       WKBPolygon    wkbPolygons[1]; // [num_wkbPolygons];
+} WKBMultiPolygon;
+
+typedef struct WKBGeometryCollection_t {
+       byte    byte_order;
+       uint32    wkbType;    // 7
+       uint32    num_wkbGeometries;
+       char    wkbGeometries[1]; // WKBGeometry [num_wkbGeometries];
+} WKBGeometryCollection;
+
+typedef struct WKBGeometry_t {
+       union {
+               WKBPoint    point;
+               WKBLineString    linestring;
+               WKBPolygon    polygon;
+               WKBGeometryCollection    collection;
+               WKBMultiPoint    mpoint;
+               WKBMultiLineString    mlinestring;
+               WKBMultiPolygon    mpolygon;
+       };
+} WKBGeometry;
+