/*
 * variable.h  変数管理
 *
 * Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
 *               1998-                           <masaki-c@is.aist-nara.ac.jp>
 *
 * 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 the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
*/
/* $Id: variable.h,v 1.11 2003/04/22 16:34:28 chikama Exp $ */

#ifndef __VARIABLE__
#define __VARIABLE__

#include <sys/types.h>
#include "portab.h"

struct VarPage {
	int size;
	boolean saveflag;
	int *value;
};

struct VarRef {
	int var;
	int page;
	int index;
};

extern int sysVar[];
extern struct VarPage varPage[];
extern double longVar[];

static inline int *v_resolveRef(struct VarRef *r) {
	return varPage[r->page].value + r->index;
}
static inline int v_sliceSize(struct VarRef *r) {
	return varPage[r->page].size - r->index;
}

const char *v_name(int var);
int *v_ref_indexed(int var, int index, struct VarRef *ref);
bool v_allocatePage(int page, int size, bool saveflag);
bool v_bindArray(int datavar, int *pointvar, int offset, int page);
bool v_unbindArray(int datavar);
void v_getPageStatus(int page, int *in_use, int *size);
void v_init(void);
void v_reset(void);

static inline int *v_ref(int var, struct VarRef *ref) {
	return v_ref_indexed(var, -1, ref);
}

void svar_init(int max_index);
int svar_maxindex(void);
const char *svar_get(int no);
void svar_set(int no, const char *str);
void svar_copy(int dstno, int dstpos, int srcno, int srcpos, int len);
void svar_append(int no, const char *str);
size_t svar_length(int no);
int svar_width(int no);
int svar_find(int no, int start, const char *str);
void svar_fromVars(int no, const int *vars);
int svar_toVars(int no, int *vars);
int svar_getCharType(int no, int pos);
void svar_replaceAll(int no, int pattern, int replacement);

#endif /* !__VARIABLE__ */