create_multilinestring()

static SHPObject * create_multilinestring ( SHPDUMPERSTATE *  state, LWMLINE *  lwmultilinestring  )

static

Definition at line 388 of file pgsql2shp-core.c.

References free(), LWMLINE::geoms, getPoint4d(), LWDEBUGF, POINT4D::m, malloc(), LWMLINE::ngeoms, POINTARRAY::npoints, shp_dumper_state::outshptype, LWLINE::points, SHPCreateObject(), POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by ShpLoaderGenerateShapeRow().

{
        SHPObject *obj;
        POINT4D p4d;
        int i, j;

        double *xpts, *ypts, *zpts, *mpts;

        int *shpparts, shppointtotal = 0, shppoint = 0;

        /* Allocate storage for ring pointers */
        shpparts = malloc(sizeof(int) * lwmultilinestring->ngeoms);

        /* First count through all the points in each linestring so we now how much memory is required */
        for (i = 0; i < lwmultilinestring->ngeoms; i++)
                shppointtotal += lwmultilinestring->geoms[i]->points->npoints;

        LWDEBUGF(3, "Total number of points: %d", shppointtotal);

        /* Allocate storage for points */
        xpts = malloc(sizeof(double) * shppointtotal);
        ypts = malloc(sizeof(double) * shppointtotal);
        zpts = malloc(sizeof(double) * shppointtotal);
        mpts = malloc(sizeof(double) * shppointtotal);

        /* Iterate through each linestring setting up shpparts to point to the beginning of each line */
        for (i = 0; i < lwmultilinestring->ngeoms; i++)
        {
                /* For each linestring, store the integer coordinate offset for the start of each line */
                shpparts[i] = shppoint;

                for (j = 0; j < lwmultilinestring->geoms[i]->points->npoints; j++)
                {
                        p4d = getPoint4d(lwmultilinestring->geoms[i]->points, j);

                        xpts[shppoint] = p4d.x;
                        ypts[shppoint] = p4d.y;
                        zpts[shppoint] = p4d.z;
                        mpts[shppoint] = p4d.m;

                        LWDEBUGF(4, "Linestring %d - Point: %g %g %g %g", i, xpts[shppoint], ypts[shppoint], zpts[shppoint], mpts[shppoint]);

                        /* Increment the point counter */
                        shppoint++;
                }
        }

        obj = SHPCreateObject(state->outshptype, -1, lwmultilinestring->ngeoms, shpparts, NULL, shppoint, xpts, ypts, zpts, mpts);

        free(xpts);
        free(ypts);
        free(zpts);
        free(mpts);

        return obj;
}

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