lwtriangle_from_gserialized2_buffer()

static LWTRIANGLE* lwtriangle_from_gserialized2_buffer ( uint8_t *  data_ptr, lwflags_t  lwflags, size_t *  size, int32_t  srid  )

static

Definition at line 1336 of file gserialized2.c.

{
        uint8_t *start_ptr = data_ptr;
        LWTRIANGLE *triangle;
        uint32_t npoints = 0;
 
        assert(data_ptr);
 
        triangle = (LWTRIANGLE*)lwalloc(sizeof(LWTRIANGLE));
        triangle->srid = srid; /* Default */
        triangle->bbox = NULL;
        triangle->type = TRIANGLETYPE;
        triangle->flags = lwflags;
 
        data_ptr += 4; /* Skip past the type. */
        npoints = gserialized2_get_uint32_t(data_ptr); /* Zero => empty geometry */
        data_ptr += 4; /* Skip past the npoints. */
 
        if (npoints > 0)
                triangle->points = ptarray_construct_reference_data(FLAGS_GET_Z(lwflags), FLAGS_GET_M(lwflags), npoints, data_ptr);
        else
                triangle->points = ptarray_construct(FLAGS_GET_Z(lwflags), FLAGS_GET_M(lwflags), 0); /* Empty triangle */
 
        data_ptr += FLAGS_NDIMS(lwflags) * npoints * sizeof(double);
 
        if (size)
                *size = data_ptr - start_ptr;
 
        return triangle;
}

References LWTRIANGLE::bbox, LWTRIANGLE::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_NDIMS, gserialized2_get_uint32_t(), lwalloc(), lwflags(), LWTRIANGLE::points, ptarray_construct(), ptarray_construct_reference_data(), LWTRIANGLE::srid, TRIANGLETYPE, and LWTRIANGLE::type.

Referenced by lwgeom_from_gserialized2_buffer().

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