parse_gml_poslist()

static POINTARRAY* parse_gml_poslist ( xmlNodePtr  xnode, bool *  hasz  )

static

Parse gml:posList.

Definition at line 896 of file lwgeom_in_gml.c.

{
        xmlChar *dimension, *gmlposlist;
        char *poslist, *p;
        int dim, gml_dim;
        POINTARRAY *dpa;
        POINT4D pt = {0, 0, 0, 0};
        bool digit;
 
        /* Retrieve gml:srsDimension attribute if any */
        dimension = gmlGetProp(xnode, "srsDimension");
        if (dimension == NULL) /* in GML 3.0.0 it was dimension */
                dimension = gmlGetProp(xnode, "dimension");
        if (dimension == NULL) dim = 2; /* We assume that we are in common 2D */
        else
        {
                dim = atoi((char *) dimension);
                xmlFree(dimension);
                if (dim < 2 || dim > 3) gml_lwpgerror("invalid GML representation", 27);
        }
        if (dim == 2) *hasz = false;
 
        /* Retrieve gml:posList string */
        gmlposlist = xmlNodeGetContent(xnode);
        poslist = (char *) gmlposlist;
 
        /* HasZ?, !HasM, 1 point */
        dpa = ptarray_construct_empty(1, 0, 1);
 
        /* gml:posList pattern:         x1 y1 x2 y2
         *                              x1 y1 z1 x2 y2 z2
         */
        while (isspace(*poslist)) poslist++;    /* Eat extra whitespaces if any */
        for (p=poslist, gml_dim=0, digit=false ; *poslist ; poslist++)
        {
                if (isdigit(*poslist)) digit = true;
                if (digit && (*poslist == ' ' || *(poslist+1) == '\0'))
                {
                        if (*poslist == ' ') *poslist = '\0';
 
                        gml_dim++;
                        if      (gml_dim == 1) pt.x = parse_gml_double(p, true, true);
                        else if (gml_dim == 2) pt.y = parse_gml_double(p, true, true);
                        else if (gml_dim == 3) pt.z = parse_gml_double(p, true, true);
 
                        if (gml_dim == dim)
                        {
                                /* Add to ptarray, allowing dupes */
                                ptarray_append_point(dpa, &pt, LW_TRUE);
                                pt.x = pt.y = pt.z = pt.m = 0.0;
                                gml_dim = 0;
                        }
                        else if (*(poslist+1) == '\0')
                                gml_lwpgerror("invalid GML representation", 28);
 
                        p = poslist+1;
                        digit = false;
                }
        }
 
        xmlFree(gmlposlist);
 
        return dpa; /* ptarray_clone_deep(dpa); */
}

References gml_lwpgerror(), gmlGetProp(), LW_TRUE, POINT4D::m, parse_gml_double(), ptarray_append_point(), ptarray_construct_empty(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by parse_gml_data().

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