vector/Vlib/rewind.c

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#include <grass/Vect.h>
#include <grass/glocale.h>

/*  Rewind vector data file to cause reads to start at beginning */
/* returns 0 on success, -1 on error */
static int rew_dummy()
{
    return -1;
}


#ifndef HAVE_OGR
static int format()
{
    G_fatal_error(_("Requested format is not compiled in this version"));
    return 0;
}
#endif


static int (*Rewind_array[][3]) () = {
    {
    rew_dummy, V1_rewind_nat, V2_rewind_nat}
#ifdef HAVE_OGR
    , {
    rew_dummy, V1_rewind_ogr, V2_rewind_ogr}
#else
    , {
    rew_dummy, format, format}
#endif
};


int Vect_rewind(struct Map_info *Map)
{
    if (!VECT_OPEN(Map))
        return -1;

    G_debug(1, "Vect_Rewind(): name = %s", Map->name);

    return (*Rewind_array[Map->format][Map->level]) (Map);
}