456 lines
14 KiB
C
456 lines
14 KiB
C
|
/****************************************************************************
|
||
|
|
|
||
|
|
Game.c
|
||
|
|
|
||
|
|
June 91, JimH initial code
|
||
|
|
Oct 91, JimH port to Win32
|
||
|
|
|
||
|
|
|
||
|
|
Routines for playing the game are here and in game2.c
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
#include "freecell.h"
|
||
|
|
#include "freecons.h"
|
||
|
|
#include <assert.h>
|
||
|
|
#include <memory.h>
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
SetFromLoc
|
||
|
|
|
||
|
|
User clicks to select card to transfer FROM.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
VOID SetFromLoc(HWND hWnd, UINT x, UINT y)
|
||
|
|
{
|
||
|
|
HDC hDC;
|
||
|
|
UINT col, pos;
|
||
|
|
|
||
|
|
wFromCol = EMPTY; // assume we didn't find a card
|
||
|
|
wFromPos = EMPTY;
|
||
|
|
|
||
|
|
cUndo = 0;
|
||
|
|
EnableMenuItem(GetMenu(hWnd), IDM_UNDO, MF_GRAYED);
|
||
|
|
|
||
|
|
if (Point2Card(x, y, &col, &pos))
|
||
|
|
{
|
||
|
|
|
||
|
|
if (col == TOPROW)
|
||
|
|
{
|
||
|
|
if (card[TOPROW][pos] == EMPTY || pos > 3)
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pos = FindLastPos(col);
|
||
|
|
if (pos == EMPTY) // empty column
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return;
|
||
|
|
|
||
|
|
wFromCol = col; // ok, we have a card
|
||
|
|
wFromPos = pos;
|
||
|
|
wMouseMode = TO;
|
||
|
|
hDC = GetDC(hWnd);
|
||
|
|
DrawCard(hDC, col, pos, card[col][pos], HILITE);
|
||
|
|
if (col == TOPROW && pos < 4)
|
||
|
|
DrawKing(hDC, LEFT, TRUE);
|
||
|
|
ReleaseDC(hWnd, hDC);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
ProcessMoveRequest
|
||
|
|
|
||
|
|
After user has selected a FROM card with SetFromLoc() above, he then
|
||
|
|
chooses a TO location with the mouse which this function processes.
|
||
|
|
|
||
|
|
Note that the layout of the cards (the card array) is copied into
|
||
|
|
an array called shadow. This is so queued move requests can be determined
|
||
|
|
before we commit to moving the cards.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
VOID ProcessMoveRequest(HWND hWnd, UINT x, UINT y)
|
||
|
|
{
|
||
|
|
UINT tcol, tpos; // location to move selected card TO
|
||
|
|
UINT freecells; // number of free cells unoccupied
|
||
|
|
UINT trans; // number of cards requested transfer requires
|
||
|
|
UINT maxtrans; // MaxTransfer() number
|
||
|
|
INT i; // index
|
||
|
|
TCHAR buffer[160]; // extra buffer needed for MessageBox
|
||
|
|
|
||
|
|
assert(wFromCol != EMPTY);
|
||
|
|
|
||
|
|
/* Make copy of card[][] in shadow[][] */
|
||
|
|
|
||
|
|
memcpy(&(shadow[0][0]), &(card[0][0]), sizeof(card));
|
||
|
|
|
||
|
|
Point2Card(x, y, &tcol, &tpos); // determine requested TO loc.
|
||
|
|
|
||
|
|
if (tcol >= MAXCOL) // if illegal move selected...
|
||
|
|
{
|
||
|
|
tpos = wFromPos; // cancel it.
|
||
|
|
tcol = wFromCol;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tcol == TOPROW) // if moving to top row
|
||
|
|
{
|
||
|
|
if (tpos > 7) // illegal move...
|
||
|
|
{
|
||
|
|
tpos = wFromPos; // so cancel it.
|
||
|
|
tcol = wFromCol;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else // if moving to a column...
|
||
|
|
{
|
||
|
|
tpos = FindLastPos(tcol); // find end of column
|
||
|
|
if (tpos == EMPTY) // if column is empty...
|
||
|
|
tpos = 0; // move to top of column.
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if moving between non-empty columns */
|
||
|
|
|
||
|
|
if (wFromCol != TOPROW && tcol != TOPROW && card[tcol][0] != EMPTY)
|
||
|
|
{
|
||
|
|
freecells = 0; // count free freecells
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
if (card[TOPROW][i] == EMPTY)
|
||
|
|
freecells++;
|
||
|
|
|
||
|
|
trans = NumberToTransfer(wFromCol, tcol); // how many required?
|
||
|
|
DEBUGMSG(TEXT("trans is %u "), trans);
|
||
|
|
DEBUGMSG(TEXT("and MaxTransfer() is %u\r\n"), MaxTransfer());
|
||
|
|
|
||
|
|
if (trans > 0) // legal move?
|
||
|
|
{
|
||
|
|
maxtrans = MaxTransfer();
|
||
|
|
if (trans <= maxtrans) // enough free cells?
|
||
|
|
{
|
||
|
|
MultiMove(wFromCol, tcol);
|
||
|
|
}
|
||
|
|
else if (bMessages)
|
||
|
|
{
|
||
|
|
LoadString(hInst, IDS_APPNAME, smallbuf, SMALL);
|
||
|
|
LoadString(hInst, IDS_TOOFEWFREE, buffer, sizeof(buffer)/sizeof(TCHAR));
|
||
|
|
wsprintf(bigbuf, buffer, trans, maxtrans);
|
||
|
|
MessageBeep(MB_ICONINFORMATION);
|
||
|
|
MessageBox(hWnd, bigbuf, smallbuf, MB_ICONINFORMATION);
|
||
|
|
|
||
|
|
/* illegal move, so deselect that card */
|
||
|
|
|
||
|
|
QueueTransfer(wFromCol, wFromPos, wFromCol, wFromPos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (bMessages)
|
||
|
|
{
|
||
|
|
LoadString(hInst, IDS_APPNAME, smallbuf, SMALL);
|
||
|
|
LoadString(hInst, IDS_ILLEGAL, bigbuf, BIG);
|
||
|
|
MessageBeep(MB_ICONINFORMATION);
|
||
|
|
MessageBox(hWnd, bigbuf, smallbuf, MB_ICONINFORMATION);
|
||
|
|
// deselect
|
||
|
|
QueueTransfer(wFromCol, wFromPos, wFromCol, wFromPos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else // else move involves TOPROW or move to empty column
|
||
|
|
{
|
||
|
|
bMoveCol = 0;
|
||
|
|
if (IsValidMove(hWnd, tcol, tpos))
|
||
|
|
{
|
||
|
|
if (bMoveCol) // user selected move column?
|
||
|
|
MoveCol(wFromCol, tcol);
|
||
|
|
else
|
||
|
|
QueueTransfer(wFromCol, wFromPos, tcol, tpos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (bMessages && (bMoveCol != -1)) // user did not select Cancel
|
||
|
|
{
|
||
|
|
LoadString(hInst, IDS_APPNAME, smallbuf, SMALL);
|
||
|
|
LoadString(hInst, IDS_ILLEGAL, bigbuf, BIG);
|
||
|
|
MessageBeep(MB_ICONINFORMATION);
|
||
|
|
MessageBox(hWnd, bigbuf, smallbuf, MB_ICONINFORMATION);
|
||
|
|
// deselect
|
||
|
|
QueueTransfer(wFromCol, wFromPos, wFromCol, wFromPos);
|
||
|
|
}
|
||
|
|
else if (bMoveCol == -1) // user selected cancel
|
||
|
|
{
|
||
|
|
// deselect
|
||
|
|
QueueTransfer(wFromCol, wFromPos, wFromCol, wFromPos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Cleanup(); // queue transfers of unneeded cards
|
||
|
|
MoveCards(hWnd); // start transferring queued cards
|
||
|
|
wMouseMode = FROM; // next mouse click chooses FROM card
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
ProcessDoubleClick
|
||
|
|
|
||
|
|
Double clicking on card in a column moves it to the first free cell found.
|
||
|
|
After finding the free cell, this routine is identical to ProcessMoveRequest.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
BOOL ProcessDoubleClick(HWND hWnd)
|
||
|
|
{
|
||
|
|
UINT freecell = EMPTY; // assume none found
|
||
|
|
INT i; // counter
|
||
|
|
|
||
|
|
for (i = 3; i >= 0; i--) // look for free cell;
|
||
|
|
if (card[TOPROW][i] == EMPTY)
|
||
|
|
freecell = (UINT) i;
|
||
|
|
|
||
|
|
if (freecell == EMPTY) // if none found
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
memcpy(&(shadow[0][0]), &(card[0][0]), sizeof(card));
|
||
|
|
|
||
|
|
wFromPos = FindLastPos(wFromCol);
|
||
|
|
QueueTransfer(wFromCol, wFromPos, TOPROW, freecell);
|
||
|
|
Cleanup();
|
||
|
|
MoveCards(hWnd);
|
||
|
|
wMouseMode = FROM;
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
IsValidMove
|
||
|
|
|
||
|
|
This function determines if moving from wFromCol,wFromPos to tcol,tpos
|
||
|
|
is valid. It can assume wFromCol and tcol are not both non-empty columns.
|
||
|
|
In other words, except for moves to empty columns, it is concerned with
|
||
|
|
moving only one card.
|
||
|
|
|
||
|
|
If the move is to an empty column, the user can select if he wants to move
|
||
|
|
one card or as much of the column as possible.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
BOOL IsValidMove(HWND hWnd, UINT tcol, UINT tpos)
|
||
|
|
{
|
||
|
|
CARD fcard, tcard; // card values (0 to 51)
|
||
|
|
UINT trans; // num cards required for transfer
|
||
|
|
UINT freecells; // num of unoccupied free cells
|
||
|
|
UINT pos;
|
||
|
|
|
||
|
|
DEBUGMSG(TEXT("IVM: tpos is %d\r\n"), tpos);
|
||
|
|
assert (tpos < MAXPOS);
|
||
|
|
|
||
|
|
bMoveCol = FALSE; // assume FALSE
|
||
|
|
|
||
|
|
/* allow cancel move from top row. */
|
||
|
|
|
||
|
|
if (wFromCol == TOPROW && tcol == TOPROW && wFromPos == tpos)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
fcard = card[wFromCol][wFromPos];
|
||
|
|
tcard = card[tcol][tpos];
|
||
|
|
|
||
|
|
/* transfer to empty column */
|
||
|
|
|
||
|
|
if ((wFromCol != TOPROW) && (tcol != TOPROW) && (card[tcol][0] == EMPTY))
|
||
|
|
{
|
||
|
|
trans = NumberToTransfer(wFromCol, tcol); // how many required?
|
||
|
|
freecells = 0;
|
||
|
|
for (pos = 0; pos < 4; pos++) // count free cells
|
||
|
|
if (card[TOPROW][pos] == EMPTY)
|
||
|
|
freecells++;
|
||
|
|
|
||
|
|
if (freecells == 0 && trans > 1) // no freecells anyway
|
||
|
|
trans = 1;
|
||
|
|
|
||
|
|
if (trans == 0) // if no valid move
|
||
|
|
return FALSE;
|
||
|
|
else if (trans == 1) // if only 1 card can move
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
/* If multiple cards can move, user must disambiguate request. */
|
||
|
|
|
||
|
|
bMoveCol = (BOOL) DialogBox(hInst, TEXT("MoveCol"), hWnd, MoveColDlg);
|
||
|
|
|
||
|
|
if (bMoveCol == -1) // CANCEL chosen
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (tcol == TOPROW)
|
||
|
|
{
|
||
|
|
if (tpos < 4) // free cells
|
||
|
|
{
|
||
|
|
if (tcard == EMPTY)
|
||
|
|
return TRUE;
|
||
|
|
else
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
else // home cells
|
||
|
|
{
|
||
|
|
if (VALUE(fcard) == ACE && tcard == EMPTY) // ace on new pile
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
else if (SUIT(fcard) == SUIT(tcard)) // same suit
|
||
|
|
{
|
||
|
|
if (VALUE(fcard) == (VALUE(tcard) + 1)) // next card
|
||
|
|
return TRUE;
|
||
|
|
else
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else // tcol is not TOPROW
|
||
|
|
{
|
||
|
|
if (card[tcol][0] == EMPTY) // top of empty column always ok
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
return FitsUnder(fcard, tcard);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
Cleanup
|
||
|
|
|
||
|
|
This function checks if exposed cards (cards in home cells or bottoms
|
||
|
|
of columns) are no longer needed (Useless.)
|
||
|
|
|
||
|
|
When it finds cards it doesn't need, it queues them for transfer. It
|
||
|
|
keeps looking until an entire pass finds no new useless cards.
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
VOID Cleanup()
|
||
|
|
{
|
||
|
|
UINT col, pos;
|
||
|
|
UINT i; // counter
|
||
|
|
CARD c;
|
||
|
|
BOOL bMore = TRUE; // assume we need another pass
|
||
|
|
|
||
|
|
while (bMore)
|
||
|
|
{
|
||
|
|
bMore = FALSE;
|
||
|
|
|
||
|
|
for (pos = 0; pos < 4; pos++) // do TOPROW first
|
||
|
|
{
|
||
|
|
c = card[TOPROW][pos];
|
||
|
|
if (Useless(c)) // if card is discardable
|
||
|
|
{
|
||
|
|
bMore = TRUE; // need another pass
|
||
|
|
|
||
|
|
/* If this is the first card of this suit, we need to
|
||
|
|
determine which home cell it can use. */
|
||
|
|
|
||
|
|
if (homesuit[SUIT(c)] == EMPTY)
|
||
|
|
{
|
||
|
|
i = 4;
|
||
|
|
while (card[TOPROW][i] != EMPTY)
|
||
|
|
i++;
|
||
|
|
homesuit[SUIT(c)] = i;
|
||
|
|
}
|
||
|
|
QueueTransfer(TOPROW, pos, TOPROW, homesuit[SUIT(c)]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (col = 1; col <= 8; col++) // do columns next
|
||
|
|
{
|
||
|
|
pos = FindLastPos(col);
|
||
|
|
if (pos != EMPTY)
|
||
|
|
{
|
||
|
|
c = card[col][pos];
|
||
|
|
if (Useless(c))
|
||
|
|
{
|
||
|
|
bMore = TRUE;
|
||
|
|
if (homesuit[SUIT(c)] == EMPTY)
|
||
|
|
{
|
||
|
|
i = 4;
|
||
|
|
while (card[TOPROW][i] != EMPTY)
|
||
|
|
i++;
|
||
|
|
homesuit[SUIT(c)] = i;
|
||
|
|
}
|
||
|
|
QueueTransfer(col, pos, TOPROW, homesuit[SUIT(c)]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
|
||
|
|
Useless
|
||
|
|
|
||
|
|
returns TRUE if a card can be safely discarded (no existing cards could
|
||
|
|
possibly play on it.)
|
||
|
|
|
||
|
|
Note that the lines identified with // *** are required in the 32 bit version
|
||
|
|
since EMPTY == 0xFFFF is not longer equal to -1 as was the case in 16 bit
|
||
|
|
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
BOOL Useless(CARD c)
|
||
|
|
{
|
||
|
|
CARD limit; // top home card of this suit
|
||
|
|
|
||
|
|
if (c == EMPTY)
|
||
|
|
return FALSE; // no card to discard
|
||
|
|
|
||
|
|
if (bCheating == CHEAT_WIN)
|
||
|
|
return TRUE;
|
||
|
|
|
||
|
|
if (VALUE(c) == ACE)
|
||
|
|
return TRUE; // ACEs can always be cleaned up
|
||
|
|
|
||
|
|
else if (VALUE(c) == DEUCE) // DEUCEs need only check if ACE is up
|
||
|
|
{
|
||
|
|
if (home[SUIT(c)] == ACE)
|
||
|
|
return TRUE;
|
||
|
|
else
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
else // else check both cards that can play on it
|
||
|
|
{
|
||
|
|
limit = VALUE(c) - 1;
|
||
|
|
if (home[SUIT(c)] != limit) // is this the next card?
|
||
|
|
return FALSE;
|
||
|
|
|
||
|
|
if (COLOUR(c) == RED)
|
||
|
|
{
|
||
|
|
if (home[CLUB] == EMPTY || home[SPADE] == EMPTY) // ***
|
||
|
|
return FALSE;
|
||
|
|
else
|
||
|
|
return (home[CLUB] >= limit && home[SPADE] >= limit);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (home[DIAMOND] == EMPTY || home[HEART] == EMPTY) // ***
|
||
|
|
return FALSE;
|
||
|
|
else
|
||
|
|
return (home[DIAMOND] >= limit && home[HEART] >= limit);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|