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+ GNU GENERAL PUBLIC LICENSE
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+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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 3 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, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
--- /dev/null
+!***************************************************************************
+!**
+!** Reverzi: Yet Another Abuse of the Z-Machine
+!**
+!** Reversi for the Z-Machine by John Menichelli
+!**
+!***************************************************************************
+
+!***************************************************************************
+!**
+!** Reverzi can be inserted into other games, possibly as an Easter egg.
+!** To start the game, call PlayRev();
+!**
+!** I've given all of the identifiers in this code a "rev_" prefix, to
+!** separate them from identifiers in the main game.
+!**
+!** The code uses 8 global variables and 192 bytes of array space.
+!**
+!** This source code is in the public domain.
+!**
+!***************************************************************************
+
+!***************************************************************************
+!**
+!** The board in internally represented as follows:
+!**
+!** 0 1 2 3 4 5 6 7
+!** 8 9 10 11 12 13 14 15
+!** 16 17 18 19 20 21 22 23
+!** 24 25 26 27 28 29 30 31
+!** 32 33 34 35 36 37 38 39
+!** 40 41 42 43 44 45 46 47
+!** 48 49 50 51 52 53 54 55
+!** 56 57 58 59 60 61 62 63
+!**
+!***************************************************************************
+
+!***************************************************************************
+!**
+!** Arrays and Variables
+!**
+!***************************************************************************
+
+Array rev_b --> 64;
+Array rev_c --> 64;
+Array rev_d --> 64;
+
+Global rev_black;
+Global rev_white;
+Global rev_play;
+Global rev_playside;
+Global rev_compside;
+Global rev_skipmove;
+Global rev_mode;
+Global rev_passes;
+
+!***************************************************************************
+!**
+!** Routines
+!**
+!***************************************************************************
+
+[ OtherSide side;
+ if (side == 1) return 2; return 1;
+];
+
+[ PosAdjoins pos side retval x y;
+ y = (pos/8);
+ x = (pos-(y*8)-1);
+ retval=0;
+
+ if (x > 0) {
+ if (rev_b->(pos-1) == side) retval = 1;
+ }
+
+ if (x < 7) {
+ if (rev_b->(pos+1) == side) retval = 1;
+ }
+
+ if (y > 0) {
+ if (rev_b->(pos-8) == side) retval = 1;
+ }
+
+ if (y < 7) {
+ if (rev_b->(pos+8) == side) retval = 1;
+ }
+
+ if ((x > 0) && (y > 0)) {
+ if (rev_b->(pos-9) == side) retval = 1;
+ }
+
+ if ((x < 7) && (y > 0)) {
+ if (rev_b->(pos-7) == side) retval = 1;
+ }
+
+ if ((x > 0) && (y < 7)) {
+ if (rev_b->(pos+7) == side) retval = 1;
+ }
+
+ if ((x < 7) && (y < 7)) {
+ if (rev_b->(pos+9) == side) retval = 1;
+ }
+
+ return retval;
+];
+
+[ CountPieces loop;
+ rev_black=0;
+ rev_white=0;
+
+ for(loop=0: loop<64: loop++)
+ {
+ if (rev_b->loop == 1) rev_black++;
+ if (rev_b->loop == 2) rev_white++;
+ }
+];
+
+[ DrawBoard i ;
+ @set_cursor 3 1;
+ for (i=0: i<64: i++)
+ {
+ if (i%8 == 0)
+ print " ";
+
+ switch (rev_b->i)
+ {
+ 0: print ". ";
+ 1: print "X ";
+ 2: print "O ";
+ }
+
+ if (i%8 == 7)
+ print "^";
+ }
+
+ CountPieces();
+
+ @set_cursor 3 22;
+ print "Black: ";
+ @set_cursor 3 29;
+ print rev_black;
+
+ @set_cursor 5 22;
+ print "White: ";
+ @set_cursor 5 29;
+ print rev_white;
+
+ @set_cursor 7 22;
+ print "Player: ";
+ if (rev_playside == 1)
+ print "X";
+ else
+ print "O";
+];
+
+[ InitGame i ;
+ for(i = 0: i < 64: i++)
+ rev_b->i = 0;
+
+ rev_b->27 = 1; ! Black
+ rev_b->28 = 2; ! White
+ rev_b->35 = 2; ! White
+ rev_b->36 = 1; ! Black
+
+ CountPieces();
+
+ @split_window 13;
+ @set_window 1;
+ @set_cursor -1 0; ! Turn off cursor
+ for (i = 1 : i <= 13 : ++i) {
+ @set_cursor i 1;
+ spaces (0->33)-1; }
+
+ @set_cursor 1 6;
+ print "R E V E R Z I";
+
+ DrawBoard();
+
+ @set_cursor 1 34;
+ print "W";
+ @set_cursor 2 33;
+ print "A S";
+ @set_cursor 3 34;
+ print "Z";
+ @set_cursor 5 33;
+ print "[Spc] Enter move";
+ @set_cursor 6 33;
+ print "[C]hange sides";
+ @set_cursor 7 33;
+ print "[P]ass";
+ @set_cursor 8 33;
+ print "[M]ode = ";
+ if (rev_mode == 0)
+ print "Slow";
+ else
+ print "Fast";
+ @set_cursor 9 33;
+ print "[Q]uit";
+ @set_cursor 10 33;
+ print "[H]elp";
+];
+
+[ LineCaptured side pos offset stop capture cont
+ count lpos loop other retval;
+
+ retval = 0;
+ other = OtherSide(side);
+ cont = 1;
+ count = 0;
+
+ for (lpos=pos+offset: (lpos >= 0 && lpos <= 63 && cont == 1): lpos=lpos+offset)
+ {
+ if (rev_b->lpos == 0) cont = 0;
+
+ if (rev_b->lpos == other) count++;
+
+ if (rev_b->lpos == side && cont ~= 0)
+ {
+ cont = 0;
+ if (capture == 1 && count > 0)
+ {
+ for (loop = pos: loop ~= lpos: loop = loop + offset)
+ rev_b->loop = side;
+ }
+ retval = count;
+ }
+ if (lpos == stop) cont = 0;
+ }
+ return retval;
+];
+
+[ PiecesCaptured side pos capture x y captured minnw minne minsw minse;
+
+ captured = 0;
+ y = (pos/8);
+ x = (pos - (y*8));
+
+ if (x < y)
+ minnw = x;
+ else
+ minnw = y;
+
+ if (x < (7 - y))
+ minsw = x;
+ else
+ minsw = (7 - y);
+
+ if ((7 - x) < y)
+ minne = (7 - x);
+ else
+ minne = y;
+
+ if ((7 - x) < (7 - y))
+ minse = (7 - x);
+ else
+ minse = (7 - y);
+
+ if (x > 0)
+ {
+ captured = captured +
+ linecaptured (side, pos, -1, pos-x, capture);
+ }
+
+ if (x < 7)
+ {
+ captured = captured +
+ linecaptured (side, pos, 1, pos+7-x, capture);
+ }
+
+ if (y > 0)
+ {
+ captured = captured +
+ linecaptured(side, pos, -8, pos-(y*8), capture);
+ }
+
+ if (y < 7)
+ {
+ captured = captured +
+ linecaptured(side, pos, 8, pos+((7-y)*8), capture);
+ }
+
+ if ((x > 0) && (y > 0))
+ {
+ captured = captured +
+ linecaptured(side, pos, -9, pos-(minnw*9), capture);
+ }
+
+ if ((x > 0) && (y < 7))
+ {
+ captured = captured +
+ linecaptured(side, pos, 7, pos+(minsw*7), capture);
+ }
+
+ if ((x < 7) && (y > 0))
+ {
+ captured = captured +
+ linecaptured(side, pos, -7, pos-(minne*7), capture);
+ }
+
+ if ((x < 7) && (y < 7))
+ {
+ captured = captured +
+ linecaptured(side, pos, 9, pos+(minse*9), capture);
+ }
+ return captured;
+];
+
+[ IsValid side pos other retval adjoins;
+ retval= 0;
+ if (pos > -1 && pos < 64)
+ {
+ other = OtherSide(side);
+ if(rev_b->pos == 0)
+ {
+ adjoins = PosAdjoins(pos, other);
+
+ if (adjoins == 1)
+ if (PiecesCaptured(side, pos, 0) > 0) retval = 1;
+ }
+ }
+ return retval;
+];
+
+! The "guts" of the program - selects moves for the computer.
+! Also checks to see if the player has any valid moves
+
+[ GetMove side loop max move;
+ max = -1;
+ move = -1;
+
+ ! If a corner is empty, avoid adjacent squares unless there is no other
+ ! choice. Refer to diagram at the beginning of this file for details.
+
+ for (loop = 0: loop < 64: loop++)
+ rev_d->loop = 0;
+
+ if (rev_b->0 == 0)
+ {
+ if (IsValid(side, 1)) rev_d->1 = 1;
+ if (IsValid(side, 8)) rev_d->8 = 1;
+ if (IsValid(side, 9)) rev_d->9 = 1;
+ }
+
+ if (rev_b->7 == 0)
+ {
+ if (IsValid(side, 6)) rev_d->6 = 1;
+ if (IsValid(side, 14)) rev_d->14 = 1;
+ if (IsValid(side, 15)) rev_d->15 = 1;
+ }
+
+ if (rev_b->56 == 0)
+ {
+ if (IsValid(side, 48)) rev_d->48 = 1;
+ if (IsValid(side, 49)) rev_d->49 = 1;
+ if (IsValid(side, 57)) rev_d->57 = 1;
+ }
+
+ if (rev_b->63 == 0)
+ {
+ if (IsValid(side, 54)) rev_d->54 = 1;
+ if (IsValid(side, 55)) rev_d->55 = 1;
+ if (IsValid(side, 62)) rev_d->62 = 1;
+ }
+
+ ! Corner moves have priority
+
+ if(IsValid(side, 0)) move = 0;
+
+ if(IsValid(side, 7)) move = 7;
+
+ if(IsValid(side, 56)) move = 56;
+
+ if(IsValid(side, 63)) move = 63;
+
+ if (move > -1)
+ return move;
+
+ else
+ {
+ for (loop = 0: loop < 64: loop++)
+ {
+ if (IsValid(side, loop))
+ {
+ rev_c->loop = PiecesCaptured(side, loop, 0);
+ if (rev_c->loop > max)
+ {
+ max = rev_c->loop;
+ move = loop;
+ }
+ if (rev_c->loop == max && random(10) > 5)
+ {
+ max = rev_c->loop;
+ move = loop;
+ }
+ }
+ else
+ rev_c->loop = 0;
+ }
+
+ ! Now we have two arrays: rev_c contains the number of pieces that would
+ ! be captured if that move was played, while rev_d contains those moves
+ ! that should be avoided.
+
+ ! First, eliminate moves adjacent to the corners
+
+ for (loop = 0: loop < 64: loop++)
+ if (rev_d->loop == 1 && rev_c->loop > 0) rev_c->loop = 0;
+
+ ! Next, check to see if any valid moves are left
+
+ max = 0; ! Re-use max
+ for (loop = 0: loop < 64: loop++)
+ if (rev_c->loop > 0) max++;
+
+ ! If a not-adajcent-to-the-corner move exists, make it
+
+ if (max > 0)
+ {
+ max = 0;
+ for (loop = 0: loop < 64: loop++)
+ {
+ if (rev_c->loop > max)
+ {
+ max = rev_c->loop;
+ move = loop;
+ }
+ if (rev_c->loop == max && random(10) > 5)
+ {
+ max = rev_c->loop;
+ move = loop;
+ }
+ }
+ }
+ }
+ return move;
+];
+
+[ GetCompMove move ;
+ move = GetMove(rev_compside);
+ if (move > -1)
+ {
+ rev_b->move = rev_compside;
+ PiecesCaptured(rev_compside, move, 1);
+ CountPieces();
+ }
+ else
+ {
+ rev_passes++;
+ CountPieces();
+ if (rev_black + rev_white == 64) return;
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+ print "[No allowable moves - skipping turn]";
+ Pause();
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ }
+];
+
+[ GetPlayerMove pos valid k cur_x cur_y a move;
+ rev_passes = 0;
+ move = GetMove(rev_playside);
+ if (move == -1)
+ {
+ rev_passes++;
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+ print "[You have no allowable moves - skipping turn]";
+ Pause();
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ rtrue;
+ }
+
+ rev_skipmove=0;
+ valid=0;
+ cur_y = 3;
+ cur_x = 5;
+ @set_cursor cur_y cur_x;
+ print "?";
+ pos = 0;
+
+ while (valid == 0 && rev_skipmove == 0)
+ {
+ for (::)
+ {
+ @read_char 1 -> k;
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+
+ ! Space (enter move)
+ if (k == ' ')
+ break;
+
+ ! Change sides
+ if (k == 'c' || k == 'C')
+ {
+ rev_compside = rev_playside;
+ rev_playside = OtherSide(rev_playside);
+ InitGame();
+ if (rev_compside == 1) ! Computer = black
+ {
+ GetCompMove();
+ DrawBoard();
+ }
+ }
+
+ ! Help
+ if (k == 'h' || k == 'H')
+ {
+ @set_window 0;
+
+ print "Rules:^^";
+
+ print "Black (X) moves first.^^
+
+ To make a legal move, your piece must be placed next to a
+ piece of the opposite color. The move is legal if
+ somewhere on the column/row/diagonal in the direction of
+ the opposite piece is one of your own pieces. All opposite
+ pieces in this direction are then captured by you and will
+ change to your color.^^
+
+ If your piece is placed next to several pieces of the
+ opposite color then you capture those pieces also.^^
+
+ If you have no possible moves you will be forced to pass
+ your turn. To manually pass simply press ~P~. Two
+ consecutive passes (one by you and one by the computer
+ will end the game.^^
+
+ If the computer cannot make a move it will display a
+ message. You continue to make your moves as normal.^^
+
+ The game is over when all fields are occupied or when no
+ side can make a legal move. The winner of the game is the
+ one with the most pieces when the game is over.^^";
+
+
+ print "Controls: Use the arrow keys to move the cursor (the ~?~)
+ around the board. When the ~?~ is where you want to place
+ your piece, press the space bar. You can also use the ~W~,
+ ~A~, ~S~ and ~Z~ keys to move the cursor.^^
+
+ Most of the menu choices should be self-explanatory. ~C~
+ allows you to change sides. Press ~P~ to pass, ~Q~ to
+ quit and ~H~ to diplay this information. ~M~ changes the
+ game's mode between fast and slow. In ~slow~ mode, the
+ game will pause after you make a move, so that you can
+ see the results of your move. In ~fast~ mode, the computer
+ will make it's move immediately after you make yours, then
+ display the results.^^";
+
+ @set_window 1;
+ }
+
+ ! Pass
+ if (k == 'p' || k == 'P')
+ {
+ rev_passes++;
+ rev_skipmove = 1;
+ break;
+ }
+
+ ! Mode change
+ if (k == 'm' || k == 'M')
+ {
+ if (rev_mode == 0)
+ rev_mode = 1;
+ else
+ rev_mode = 0;
+
+ @set_cursor 8 33;
+ print "[M]ode = ";
+ if (rev_mode == 0)
+ print "Slow";
+ else
+ print "Fast";
+ }
+
+ ! Quit
+ if (k == 'q' || k == 'Q')
+ {
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+ print "Play again? (y/n) ";
+
+ @read_char 1 -> a;
+ if (a == 'n' || a == 'N') {
+ rev_play = 0;
+ break; }
+ else
+ {
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ rev_playside = 1;
+ rev_compside = 2;
+ InitGame();
+ }
+ }
+
+ ! Left
+ if (k == 'a' || k == 'A' || k == 131)
+ {
+ if (pos%8 == 0)
+ pos = pos + 7;
+ else
+ pos--;
+ cur_x = cur_x - 2;
+ if (cur_x < 5) cur_x = 19;
+ DrawBoard();
+ }
+
+ ! Right
+ if (k == 's' || k == 'S' || k == 132)
+ {
+ if ((pos+1)%8 == 0)
+ pos = pos - 7;
+ else
+ pos++;
+ cur_x = cur_x + 2;
+ if (cur_x > 19) cur_x = 5;
+ DrawBoard();
+ }
+
+ ! Up
+ if (k == 'w' || k == 'W' || k == 129)
+ {
+ if (pos <= 7)
+ pos = pos + 56;
+ else
+ pos = pos - 8;
+ cur_y--;
+ if (cur_y < 3) cur_y = 10;
+ DrawBoard();
+ }
+
+ ! Down
+ if (k == 'z' || k == 'Z' || k == 0 || k == 130)
+ {
+ if (pos >= 56)
+ pos = pos - 56;
+ else
+ pos = pos + 8;
+ cur_y++;
+ if (cur_y > 10) cur_y = 3;
+ DrawBoard();
+ }
+ @set_cursor cur_y cur_x;
+ print "?";
+ }
+ if (rev_play == 0) return;
+ if (rev_skipmove == 1) return;
+ if (IsValid(rev_playside, pos) == 1)
+ valid = 1;
+ else
+ {
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+ print "[Invalid move]";
+ }
+ }
+
+ if (rev_skipmove == 0) {
+ rev_b->pos = rev_playside;
+ PiecesCaptured(rev_playside, pos, 1);
+ DrawBoard();
+ CountPieces();
+ }
+];
+
+[ PlayRev a;
+ rev_mode = 1; ! Fast (default)
+
+.Start;
+ rev_playside = 1;
+ rev_compside = 2;
+ rev_play = 1;
+ while (rev_play)
+ {
+ InitGame();
+ while ((rev_black+rev_white < 64) &&
+ (rev_black > 0) &&
+ (rev_white > 0) &&
+ (rev_passes < 2))
+ {
+ GetPlayerMove();
+
+ if (rev_play == 0) break;
+ if (rev_mode == 0)
+ {
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+ print "[Press any key to continue]";
+ Pause();
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ }
+ GetCompMove();
+ DrawBoard();
+ }
+
+ if (rev_play == 0) break;
+
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ @set_cursor 12 5;
+
+ if (rev_passes == 2) {
+ print "Two passes - game ends.";
+ jump PlayAgain; }
+
+ if (rev_black > rev_white)
+ {
+ if (rev_playside == 1)
+ print "You win.";
+ else
+ print "I win.";
+ }
+
+ if (rev_white > rev_black)
+ {
+ if (rev_playside == 1)
+ print "I win.";
+ else
+ print "You win.";
+ }
+
+ if (rev_white == rev_black)
+ print "Drawn game.";
+
+.PlayAgain;
+ print " Play again? (y/n) ";
+
+ @read_char 1 -> a;
+ if (a == 'y' || a == 'Y') {
+ @set_cursor 12 1;
+ spaces (0->33) - 1;
+ jump Start; }
+ else
+ break;
+ }
+ @set_cursor -2 0; ! Turn cursor on again
+ @set_cursor 1 1;
+ @split_window 0;
+ @erase_window $ffff;
+];
+
+[ Main ;
+
+ PlayRev();
+
+ print "Reverzi, Version 1.0^
+ Reverzi is a port of Reversi to the Z-Machine^
+ Ported by John Menichelli, December 1999^^";
+
+ print "The original source code was written by Dave Derrick for handheld
+ PCs. I downloaded it from the OrbWorks web site
+ (www.orbworks.com/ceres.html) and converted it to Inform. The
+ original source was written in PocketC and was very easy to convert
+ to Inform; the most difficult part of the conversion was creating
+ the UI. ^^";
+
+ print "Special thanks to Andrew Plotkin - some of the code for this
+ game - along with the idea of abusing the Z-Machine - was borrowed
+ from his game ~Freefall.~^^";
+];
+
+[ Pause dummy;
+ @read_char 1 dummy;
+ return dummy;
+];
projects / reverzi.git / commitdiff