/*
 * sactstring.c: SACTの文字列操作関連
 *
 * 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: sactstring.c,v 1.3 2003/08/02 13:10:32 chikama Exp $ */

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "portab.h"
#include "system.h"
#include "list.h"
#include "variable.h"
#include "sact.h"

#define DEFSTACKSIZE 100
static char **stack;   // stack本体
static int idx;        // stack pointer
static int idxmax;     // stack pointerの最大

/**
 * 文字列変数スタックの初期化
 */
void sstr_init(void) {
	stack = malloc(sizeof(char *) * DEFSTACKSIZE);
	idx = 0;
	idxmax = DEFSTACKSIZE;
}

void sstr_reset(void) {
	for (int i = 0; i < idx; i++)
		free(stack[i]);
	idx = 0;
	free(stack);
	stack = NULL;

	for (SList *l = sact.strreplace; l; l = l->next) {
		strexchange_t *ex = l->data;
		free(ex->src);
		free(ex->dst);
		free(ex);
	}
	slist_free(sact.strreplace);
	sact.strreplace = NULL;
}

/**
 * 文字列変数スタックに文字列を積む
 * @param strno: シナリオ上での文字列変数番号
 */
void sstr_push(int strno) {
	if (idx >= idxmax) {
		stack = realloc(stack, sizeof(char *) * idx*2);
		idxmax = idx*2;
	}
	
	stack[idx++] = strdup(svar_get(strno));
}

/**
 * 文字列変数スタックから文字列を取り出す
 * @param strno: スタックから戻した文字列を格納する文字列変数番号
 */
void sstr_pop(int strno) {
	if (idx == 0) return;
	
	svar_set(strno, stack[--idx]);
	free(stack[idx]);
}

/**
 * 文字列の置き換え
 * @param sstrno: 変換元文字列変数番号
 * @param dstrno: 変換先文字列変数番号
 */
void sstr_regist_replace(int sstrno, int dstrno) {
	strexchange_t *ex;
	
	if (sstrno == dstrno) return;
	
	ex = malloc(sizeof(strexchange_t));
	ex->src = strdup(svar_get(sstrno));
	ex->dst = strdup(svar_get(dstrno));
	sact.strreplace = slist_append(sact.strreplace, ex);
}

/**
 * 数値 -> 文字列化
 */
void sstr_num2str(int strno, int fig, int nzeropad, int num) {
	char s[256], ss[256];
	
	if (nzeropad) {
		char *sss = "%%0%dd";
		sprintf(ss, sss, fig);
	} else {
		char *sss = "%%%dd";
		sprintf(ss, sss, fig);
	}
	
	sprintf(s, ss, num);
	svar_set(strno, s);
}