/*

#  $Id$

#  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);

	PERL_UNUSED_VAR(xxx);

    }

    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];

        /* clear any previous ParamValues before error is generated */

        SV **svp = hv_fetch((HV*)DBIc_MY_H(imp_sth),"ParamValues",11,FALSE);

        if (svp && SvROK(*svp) && SvTYPE(SvRV(*svp)) == SVt_PVHV) {

            HV *hv = (HV*)SvRV(*svp);

            hv_clear(hv);

        }

	sprintf(errmsg,"called with %d bind variables when %d are needed",

		(int)items-1, DBIc_NUM_PARAMS(imp_sth));

        DBIh_SET_ERR_CHAR(sth, (imp_xxh_t*)imp_sth, "-1", -1, errmsg, Nullch, Nullch);

	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");

        DBIh_SET_ERR_CHAR(sth, (imp_xxh_t*)imp_sth, "-1", -1, errmsg, Nullch, Nullch);

	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