/*
	bi_gib.c

	GIB <-> Ruamoko interface

	Copyright (C) 2003 Brian Koropoff

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

static __attribute__ ((unused)) const char rcsid[] =
	"$Id$";

#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include "QF/cmd.h"
#include "QF/csqc.h"
#include "QF/hash.h"
#include "QF/progs.h"
#include "QF/sys.h"
#include "QF/gib.h"
#include "gib_builtin.h"

typedef struct bi_gib_builtin_s {
	struct bi_gib_builtin_s *next;
	gib_builtin_t *builtin;
	progs_t *pr;
	func_t func;
} bi_gib_builtin_t;

typedef struct bi_gib_resources_s {
	bi_gib_builtin_t *builtins;
} bi_gib_resources_t;

static hashtab_t *bi_gib_builtins;

static const char *
bi_gib_builtin_get_key (void *c, void *unused)
{
	return ((bi_gib_builtin_t *)c)->builtin->name;
}

static void
bi_gib_builtin_free (void *_c, void *unused)
{
	bi_gib_builtin_t *c = (bi_gib_builtin_t *) _c;

	free (c);
}

static void
bi_gib_builtin_f (void)
{
	bi_gib_builtin_t *builtin = Hash_Find (bi_gib_builtins, GIB_Argv(0));
	pr_type_t *pr_list;
	int i;

	if (!builtin)
		Sys_Error ("bi_gib_builtin_f: unexpected call %s", GIB_Argv (0));

	pr_list = PR_Zone_Malloc (builtin->pr, GIB_Argc() * sizeof (pr_type_t));

	for (i = 0; i < GIB_Argc(); i++)
		pr_list[i].integer_var = PR_SetString (builtin->pr, GIB_Argv(i));

	P_INT (builtin->pr, 0) = GIB_Argc();
	P_INT (builtin->pr, 1) = POINTER_TO_PROG (builtin->pr, pr_list);
	PR_ExecuteProgram (builtin->pr, builtin->func);
}

static void
bi_gib_builtin_clear (progs_t *progs, void *data)
{
	bi_gib_resources_t *res = (bi_gib_resources_t *) data;
	bi_gib_builtin_t *cur;

	while ((cur = res->builtins)) {
		void *del = Hash_Del (bi_gib_builtins, cur->builtin->name);
		GIB_Builtin_Remove (cur->builtin->name);
		res->builtins = cur->next;
		Hash_Free (bi_gib_builtins, del);
	}
}

static void
bi_GIB_Builtin_Add (progs_t *pr)
{
	bi_gib_resources_t *res = PR_Resources_Find (pr, "GIB");
	bi_gib_builtin_t   *builtin;
	char       *name = P_GSTRING (pr, 0);
	func_t      func = P_FUNCTION (pr, 1);

	if (GIB_Builtin_Exists (name)) {
		R_INT (pr) = 0;
		return;
	}

	builtin = malloc (sizeof (bi_gib_builtin_t));

	GIB_Builtin_Add (name, bi_gib_builtin_f);

	builtin->builtin = GIB_Builtin_Find (name);
	builtin->pr = pr;
	builtin->func = func;
	builtin->next = res->builtins;
	res->builtins = builtin;
	Hash_Add (bi_gib_builtins, builtin);
	R_INT (pr) = 1;
}

static void
bi_GIB_Return (progs_t *pr)
{
	char *str = P_GSTRING(pr, 0);

	if (str)
		GIB_Return (str);
	R_INT (pr) = GIB_CanReturn () ? 1 : 0;
}

static void
bi_GIB_Handle_Class_New (progs_t *pr)
{
	R_INT (pr) = GIB_Handle_Class_New ();
}

static void
bi_GIB_Handle_New (progs_t *pr)
{
	long *qcptr = malloc (sizeof (long));
	*qcptr = P_POINTER (pr, 0);
	R_INT (pr) = GIB_Handle_New (qcptr, P_INT (pr, 1));
}

static void
bi_GIB_Handle_Free (progs_t *pr)
{
	unsigned long int hand = P_INT (pr, 0);
	unsigned short int cl = (unsigned short) P_INT (pr, 1);
	long *qcptr = GIB_Handle_Get (hand, cl);

	free (qcptr);
	GIB_Handle_Free (hand, cl);
}

static void
bi_GIB_Handle_Get (progs_t *pr)
{
	long *hand = GIB_Handle_Get (P_INT (pr, 0), (unsigned short) P_INT (pr, 1));
	if (hand)
		R_INT (pr) = *hand;
	else
		R_INT (pr) = 0;
}

void
GIB_Progs_Init (progs_t *pr)
{
	bi_gib_resources_t *res = malloc (sizeof (bi_gib_resources_t));
	res->builtins = 0;

	PR_Resources_Register (pr, "GIB", res, bi_gib_builtin_clear);

	bi_gib_builtins = Hash_NewTable (1021, bi_gib_builtin_get_key, bi_gib_builtin_free, 0);

	PR_AddBuiltin (pr, "GIB_Builtin_Add", bi_GIB_Builtin_Add, -1);
	PR_AddBuiltin (pr, "GIB_Return", bi_GIB_Return, -1);
	PR_AddBuiltin (pr, "GIB_Handle_Class_New", bi_GIB_Handle_Class_New, -1);
	PR_AddBuiltin (pr, "GIB_Handle_New", bi_GIB_Handle_New, -1);
	PR_AddBuiltin (pr, "GIB_Handle_Free", bi_GIB_Handle_Free, -1);
	PR_AddBuiltin (pr, "GIB_Handle_Get", bi_GIB_Handle_Get, -1);
}