/* $OpenLDAP$ */
/*
 * Copyright 1999-2003 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */
/*
 *	 Copyright 1999, John C. Quillan, All rights reserved.
 *	 Portions Copyright 2002, myinternet Limited. All rights reserved.
 *
 *	 Redistribution and use in source and binary forms are permitted only
 *	 as authorized by the OpenLDAP Public License.	A copy of this
 *	 license is available at http://www.OpenLDAP.org/license.html or
 *	 in file LICENSE in the top-level directory of the distribution.
 */

#include <EXTERN.h>
#include <perl.h>
#undef _ /* #defined used by both Perl and ac/localize.h */

#ifdef HAVE_WIN32_ASPERL
#include "asperl_undefs.h"
#endif

#include "portable.h"
	
#include <stdio.h>

#include "slap.h"

#include "perl_back.h"


static void perl_back_xs_init LDAP_P((PERL_BACK_XS_INIT_PARAMS));
EXT void boot_DynaLoader LDAP_P((PERL_BACK_BOOT_DYNALOADER_PARAMS));

PerlInterpreter *PERL_INTERPRETER = NULL;
ldap_pvt_thread_mutex_t	perl_interpreter_mutex;

#ifdef SLAPD_PERL_DYNAMIC

int init_module(int argc, char *argv[])
{
	BackendInfo bi;

	memset( &bi, '\0', sizeof(bi) );
	bi.bi_type = "perl";
	bi.bi_init = perl_back_initialize;

	backend_add(&bi);
	return 0;
}

#endif /* SLAPD_PERL_DYNAMIC */


/**********************************************************
 *
 * Init
 *
 **********************************************************/

int
perl_back_initialize(
	BackendInfo	*bi
)
{
	char *embedding[] = { "", "-e", "0" };

	Debug( LDAP_DEBUG_TRACE, "perl backend open\n", 0, 0, 0 );

	if( PERL_INTERPRETER != NULL ) {
		Debug( LDAP_DEBUG_ANY, "perl backend open: already opened\n",
			0, 0, 0 );
		return 1;
	}
	
	PERL_INTERPRETER = perl_alloc();
	perl_construct(PERL_INTERPRETER);
	perl_parse(PERL_INTERPRETER, perl_back_xs_init, 3, embedding, (char **)NULL);
	perl_run(PERL_INTERPRETER);

	bi->bi_open = perl_back_open;
	bi->bi_config = 0;
	bi->bi_close = perl_back_close;
	bi->bi_destroy = perl_back_destroy;

	bi->bi_db_init = perl_back_db_init;
	bi->bi_db_config = perl_back_db_config;
	bi->bi_db_open = perl_back_db_open;
	bi->bi_db_close = 0;
	bi->bi_db_destroy = perl_back_db_destroy;

	bi->bi_op_bind = perl_back_bind;
	bi->bi_op_unbind = 0;
	bi->bi_op_search = perl_back_search;
	bi->bi_op_compare = perl_back_compare;
	bi->bi_op_modify = perl_back_modify;
	bi->bi_op_modrdn = perl_back_modrdn;
	bi->bi_op_add = perl_back_add;
	bi->bi_op_delete = perl_back_delete;
	bi->bi_op_abandon = 0;

	bi->bi_extended = 0;

	bi->bi_chk_referrals = 0;

	bi->bi_connection_init = 0;
	bi->bi_connection_destroy = 0;

	return 0;
}
		
int
perl_back_open(
	BackendInfo	*bi
)
{
	ldap_pvt_thread_mutex_init( &perl_interpreter_mutex );
	return 0;
}

int
perl_back_db_init(
	BackendDB	*be
)
{
	be->be_private = (PerlBackend *) ch_malloc( sizeof(PerlBackend) );
	memset( be->be_private, '\0', sizeof(PerlBackend));

	((PerlBackend *)be->be_private)->pb_filter_search_results = 0;

	Debug( LDAP_DEBUG_TRACE, "perl backend db init\n", 0, 0, 0 );

	return 0;
}

int
perl_back_db_open(
	BackendDB	*be
)
{
	int count;
	int return_code;

	PerlBackend *perl_back = (PerlBackend *) be->be_private;

	ldap_pvt_thread_mutex_lock( &perl_interpreter_mutex );

	{
		dSP; ENTER; SAVETMPS;

		PUSHMARK(sp);
		XPUSHs( perl_back->pb_obj_ref );

		PUTBACK;

#ifdef PERL_IS_5_6
		count = call_method("init", G_SCALAR);
#else
		count = perl_call_method("init", G_SCALAR);
#endif

		SPAGAIN;

		if (count != 1) {
			croak("Big trouble in perl_back_db_open\n");
		}

		return_code = POPi;

		PUTBACK; FREETMPS; LEAVE;
	}

	ldap_pvt_thread_mutex_unlock( &perl_interpreter_mutex );

	return return_code;
}


static void
perl_back_xs_init(PERL_BACK_XS_INIT_PARAMS)
{
	char *file = __FILE__;
	dXSUB_SYS;
	newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
}