parse_gml_pos()

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

static

Parse gml:pos.

Definition at line 693 of file lwgeom_in_gml.c.

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

Referenced by parse_gml_data().

{
        xmlChar *dimension, *gmlpos;
        int dim, gml_dim;
        POINTARRAY *dpa;
        char *pos, *p;
        bool digit;
        POINT4D pt;

        /* HasZ, !HasM, 1 Point */
        dpa = ptarray_construct_empty(1, 0, 1);

    dimension = gmlGetProp(xnode, (xmlChar *) "srsDimension");
    if (dimension == NULL) /* in GML 3.0.0 it was dimension */
        dimension = gmlGetProp(xnode, (xmlChar *) "dimension");
    if (dimension == NULL) dim = 2;     /* We assume that we are in 2D */
    else
    {
        dim = atoi((char *) dimension);
        xmlFree(dimension);
        if (dim < 2 || dim > 3)
            gml_lwpgerror("invalid GML representation", 25);
    }
    if (dim == 2) *hasz = false;

    /* We retrieve gml:pos string */
    gmlpos = xmlNodeGetContent(xnode);
    pos = (char *) gmlpos;
    while (isspace(*pos)) pos++;        /* Eat extra whitespaces if any */

    /* gml:pos pattern:         x1 y1
        *                       x1 y1 z1
        */
    for (p=pos, gml_dim=0, digit=false ; *pos ; pos++)
    {
        if (isdigit(*pos)) digit = true;
        if (digit && (*pos == ' ' || *(pos+1) == '\0'))
        {
            if (*pos == ' ') *pos = '\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);

            p = pos+1;
            digit = false;
        }
    }
    xmlFree(gmlpos);

    /* Test again coherent dimensions on each coord */
    if (gml_dim == 2) *hasz = false;
    if (gml_dim < 2 || gml_dim > 3 || gml_dim != dim)
        gml_lwpgerror("invalid GML representation", 26);

    ptarray_append_point(dpa, &pt, LW_FALSE);

        return dpa; /* ptarray_clone_deep(dpa); */
}

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