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/*
* ksokoban - a Sokoban game for KDE
* Copyright (C) 1998 Anders Widell <[email protected]>
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include "Move.h"
#include "LevelMap.h"
Move::Move (int _startX, int _startY) {
assert (_startX>=0 && _startX<=MAX_X && _startY>=0 && _startY<=MAX_Y);
moves_ = new unsigned short[400];
moves_[0] = _startX | (_startY<<8);
moveIndex_ = 1;
finished_ = false;
#ifndef NDEBUG
lastX_ = _startX;
lastY_ = _startY;
#endif
}
Move::~Move () {
delete [] moves_;
}
void
Move::finish () {
assert (!finished_);
assert (moveIndex_ > 1);
unsigned short *newMoves = new unsigned short[moveIndex_];
memcpy (newMoves, moves_, moveIndex_*sizeof (unsigned short));
delete [] moves_;
moves_ = newMoves;
finished_ = true;
}
void
Move::save (QString &s) {
static const char move1[] = "lrud";
static const char push1[] = "LRUD";
static const char move2[] = "wens";
static const char push2[] = "WENS";
assert (finished_);
int x=startX ();
int y=startY ();
int pos=1;
int x2, y2, dist=0;
int dir=-1;
bool push=false;
while (pos<moveIndex_) {
if (dir >= 0) s += push ? push1[dir] : move1[dir];
x2 = moves_[pos]&0x7f;
y2 = (moves_[pos]>>8)&0x7f;
push = (moves_[pos++]&0x80)==0x80;
if (x2<x) {
dir = 0;
dist = x-x2;
} else if (x2>x) {
dir = 1;
dist = x2-x;
} else if (y2<y) {
dir = 2;
dist = y-y2;
} else if (y2>y) {
dir = 3;
dist = y2-y;
} else {
assert (0);
}
assert (dist > 0);
if (dist > 1) {
if (dist>=10) {
s += '0' + (dist/10);
dist %= 10;
}
s += '0' + dist;
}
x = x2;
y = y2;
}
if (dir >= 0) s += push ? push2[dir] : move2[dir];
}
const char *
Move::load (const char *s) {
assert (!finished_);
int x=finalX ();
int y=finalY ();
int dist;
bool last=false;
char c;
while ((c = *s++) != '\0') {
dist = 1;
if (c >= '0' && c <= '9') {
dist = c - '0';
c = *s++;
if (c >= '0' && c <= '9') {
dist = 10*dist + c - '0';
c = *s++;
}
}
switch (tolower (c)) {
case 'w':
last = true;
case 'l':
x -= dist;
break;
case 'e':
last = true;
case 'r':
x += dist;
break;
case 'n':
last = true;
case 'u':
y -= dist;
break;
case 's':
last = true;
case 'd':
y += dist;
break;
default:
//printf ("2><>%s\n", s);
//abort ();
return 0;
}
if (x<=0 || x>=MAX_X || y<=0 || y>=MAX_Y) {
//printf ("x: %d, y:%d ><>%s\n", x, y, s);
//abort ();
return 0;
}
if (isupper (c)) push (x, y);
else step (x, y);
if (last) break;
}
finish ();
return s;
}
bool
Move::redo (LevelMap *map) {
assert (finished_);
for (int pos=1; pos<moveIndex_; pos++) {
int x = moves_[pos]&0x7f;
int y = (moves_[pos]>>8)&0x7f;
bool push = (moves_[pos]&0x80)==0x80;
bool ret;
if (push) ret = map->push (x, y);
else ret = map->step (x, y);
if (!ret) return false;
}
return true;
}
bool
Move::undo (LevelMap *map) {
assert (finished_);
for (int pos=moveIndex_-2; pos>=0; --pos) {
int x = moves_[pos]&0x7f;
int y = (moves_[pos]>>8)&0x7f;
bool push = (moves_[pos+1]&0x80)==0x80;
bool ret;
if (push) ret = map->unpush (x, y);
else ret = map->unstep (x, y);
if (!ret) return false;
}
return true;
}
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