/*
#  $Id: Driver_xst.h 13334 2009-09-14 09:12:07Z hmbrand $
#  Copyright (c) 2002  Tim Bunce  Ireland
#
#  You may distribute under the terms of either the GNU General Public
#  License or the Artistic License, as specified in the Perl README file.
*/
/* This is really just a workaround for SUPER:: not working right for XS code.
 * It would be better if we setup perl's context so SUPER:: did the right thing
 * (borrowing the relevant magic from pp_entersub in perl pp_hot.c).
 * Then we could just use call_method("SUPER::foo") instead.
 * XXX remember to call SPAGAIN in the calling code after calling this!
 */
static SV *
dbixst_bounce_method(char *methname, int params)
{
    dTHX;
    /* XXX this 'magic' undoes the dMARK embedded in the dXSARGS of our caller  */
    /* so that the dXSARGS below can set things up as they were for our caller  */
    void *xxx = PL_markstack_ptr++;
    dXSARGS; /* declares sp, ax, mark, items */
    int i;
    SV *sv;
    int debug = 0;
    D_imp_xxh(ST(0));
    if (debug >= 3) {
        PerlIO_printf(DBIc_LOGPIO(imp_xxh),
            "    -> %s (trampoline call with %d (%ld) params)\n", methname, params, (long)items);
        xxx = xxx; /* avoid unused var warning */
    }
    EXTEND(SP, params);
    PUSHMARK(SP);
    for (i=0; i < params; ++i) {
        sv = (i >= items) ? &PL_sv_undef : ST(i);
        PUSHs(sv);
    }
    PUTBACK;
    i = call_method(methname, G_SCALAR);
    SPAGAIN;
    sv = (i) ? POPs : &PL_sv_undef;
    PUTBACK;
    if (debug >= 3)
        PerlIO_printf(DBIc_LOGPIO(imp_xxh),
            "    <- %s= %s (trampoline call return)\n", methname, neatsvpv(sv,0));
    return sv;
}
static int
dbdxst_bind_params(SV *sth, imp_sth_t *imp_sth, I32 items, I32 ax)
{
    /* Handle binding supplied values to placeholders.          */
    /* items = one greater than the number of params            */
    /* ax = ax from calling sub, maybe adjusted to match items  */
    dTHX;
    int i;
    SV *idx;
    if (items-1 != DBIc_NUM_PARAMS(imp_sth)
        && DBIc_NUM_PARAMS(imp_sth) != DBIc_NUM_PARAMS_AT_EXECUTE
    ) {
        char errmsg[99];
        sprintf(errmsg,"called with %d bind variables when %d are needed",
                (int)items-1, DBIc_NUM_PARAMS(imp_sth));
        sv_setpv(DBIc_ERRSTR(imp_sth), errmsg);
        sv_setiv(DBIc_ERR(imp_sth), (IV)-1);
        return 0;
    }
    idx = sv_2mortal(newSViv(0));
    for(i=1; i < items ; ++i) {
        SV* value = ST(i);
        if (SvGMAGICAL(value))
            mg_get(value);      /* trigger magic to FETCH the value     */
        sv_setiv(idx, i);
        if (!dbd_bind_ph(sth, imp_sth, idx, value, 0, Nullsv, FALSE, 0)) {
            return 0;   /* dbd_bind_ph already registered error */
        }
    }
    return 1;
}
#ifndef dbd_fetchall_arrayref
static SV *
dbdxst_fetchall_arrayref(SV *sth, SV *slice, SV *batch_row_count)
{
    dTHX;
    D_imp_sth(sth);
    SV *rows_rvav;
    if (SvOK(slice)) {  /* should never get here */
        char errmsg[99];
        sprintf(errmsg,"slice param not supported by XS version of fetchall_arrayref");
        sv_setpv(DBIc_ERRSTR(imp_sth), errmsg);
        sv_setiv(DBIc_ERR(imp_sth), (IV)-1);
        return &PL_sv_undef;
    }
    else {
        IV maxrows = SvOK(batch_row_count) ? SvIV(batch_row_count) : -1;
        AV *fetched_av;
        AV *rows_av = newAV();
        if ( !DBIc_ACTIVE(imp_sth) && maxrows>0 ) {
            /* to simplify application logic we return undef without an error   */
            /* if we've fetched all the rows and called with a batch_row_count  */
            return &PL_sv_undef;
        }
        av_extend(rows_av, (maxrows>0) ? maxrows : 31);
        while ( (maxrows < 0 || maxrows-- > 0)
            && (fetched_av = dbd_st_fetch(sth, imp_sth))
        ) {
            AV *copy_row_av = av_make(AvFILL(fetched_av)+1, AvARRAY(fetched_av));
            av_push(rows_av, newRV_noinc((SV*)copy_row_av));
        }
        rows_rvav = sv_2mortal(newRV_noinc((SV *)rows_av));
    }
    return rows_rvav;
}
#endif