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-rw-r--r--FICS/algcheck.c854
-rw-r--r--FICS/algcheck.h12
-rw-r--r--FICS/movecheck.c2050
-rw-r--r--FICS/movecheck.h48
4 files changed, 1315 insertions, 1649 deletions
diff --git a/FICS/algcheck.c b/FICS/algcheck.c
index 67609b1..10fad0c 100644
--- a/FICS/algcheck.c
+++ b/FICS/algcheck.c
@@ -19,25 +19,17 @@
/* Revision history:
name email yy/mm/dd Change
- Richard Nash 93/10/22 Created
- Markus Uhlin 24/01/04 Reformatted functions
- Markus Uhlin 24/01/06 Switched to usage of strlcpy,
- strlcat and snprintf. Also added
- truncation checks.
+ Richard Nash 93/10/22 Created
*/
#include "stdinclude.h"
-#include "common.h"
+#include "common.h"
#include "algcheck.h"
-#include "board.h"
#include "movecheck.h"
+#include "board.h"
#include "utils.h"
-#if __linux__
-#include <bsd/string.h>
-#endif
-
/* Well, lets see if I can list the possibilities
* Piece moves
* Ne4
@@ -66,484 +58,408 @@
* x - x
* @ - drop character (bughouse)
*/
-PRIVATE char *alg_list[] = {
- "fxfr", "pxfr", /* These two get confused in case of bishop */
- "ffr", "pfr", /* These two get confused in case of bishop */
- "pffr",
- "pfxfr",
- "prfr",
- "prxfr",
- "fr",
- "ff",
- "fxf",
- "p@fr",
- "#fr",
- "#pfr",
- NULL
+char *alg_list[] = {
+ "fxfr", "pxfr", /* These two get confused in case of bishop */
+ "ffr", "pfr", /* These two get confused in case of bishop */
+ "pffr",
+ "pfxfr",
+ "prfr",
+ "prxfr",
+ "fr",
+ "ff",
+ "fxf",
+ "p@fr",
+ "#fr",
+ "#pfr",
+ NULL
};
-PRIVATE int
-get_move_info(char *str, int *piece, int *ff, int *fr, int *tf, int *tr,
- int *bishconfusion)
-{
- char *s;
- char c;
- char tmp[1024] = { '\0' };
- int i, j, len;
- int lpiece, lff, lfr, ltf, ltr;
- int matchVal = -1;
-
- *bishconfusion = 0;
- strlcpy(tmp, str, sizeof tmp);
-
- if ((s = strchr(tmp, '+')) != NULL) { // Cut off any check marks
- *s = '\0';
- }
- if ((s = strchr(tmp, '=')) != NULL) { // Cut off any promotion marks
- *s = '\0';
- }
-
- *piece = *ff = *fr = *tf = *tr = ALG_UNKNOWN;
- len = strlen(tmp);
-
- for (i = 0; alg_list[i]; i++) {
- lpiece = lff = lfr = ltf = ltr = ALG_UNKNOWN;
-
- if (strlen(alg_list[i]) != len)
- continue;
-
- for (j = len - 1; j >= 0; j--) {
- switch (alg_list[i][j]) {
- case 'f':
- if (tmp[j] < 'a' || tmp[j] > 'h')
- goto nomatch;
-
- if (ltf == ALG_UNKNOWN)
- ltf = (tmp[j] - 'a');
- else
- lff = (tmp[j] - 'a');
- break;
- case 'r':
- if (tmp[j] < '1' || tmp[j] > '8')
- goto nomatch;
-
- if (ltr == ALG_UNKNOWN)
- ltr = (tmp[j] - '1');
- else
- lfr = (tmp[j] - '1');
- break;
- case 'p':
- if (isupper(tmp[j]))
- c = tolower(tmp[j]);
- else
- c = tmp[j];
-
- if (c == 'k')
- lpiece = KING;
- else if (c == 'q')
- lpiece = QUEEN;
- else if (c == 'r')
- lpiece = ROOK;
- else if (c == 'b')
- lpiece = BISHOP;
- else if (c == 'n')
- lpiece = KNIGHT;
- else if (c == 'p')
- lpiece = PAWN;
- else
- goto nomatch;
- break;
- case 'x':
- if (tmp[j] != 'x' && tmp[j] != 'X')
- goto nomatch;
- break;
- case '@':
- if (tmp[j] != '@' && tmp[j] != '*')
- goto nomatch;
- lff = lfr = ALG_DROP;
- break;
- case '#':
- if (tmp[j] != '#')
- goto nomatch;
- lff = lfr = ALG_DROP;
- break;
- default:
- fprintf(stderr, "Unknown character in "
- "algebraic parsing\n");
- break;
- }
- }
-
- if (lpiece == ALG_UNKNOWN)
- lpiece = PAWN;
-
- if (lpiece == PAWN && lfr == ALG_UNKNOWN) { // ffr or ff
- if (lff != ALG_UNKNOWN) {
- if (lff == ltf)
- goto nomatch;
- if ((lff - ltf) != 1 && (ltf - lff) != 1)
- goto nomatch;
- }
- }
-
- *piece = lpiece; // We have a match
-
- *tf = ltf;
- *tr = ltr;
- *ff = lff;
- *fr = lfr;
-
- if (matchVal != -1) {
- /*
- * We have two matches, it must be that Bxc4
- * vs. bxc4 problem. Or it could be the Bc4 vs
- * bc4 problem.
- */
- *bishconfusion = 1;
- }
+#define ALG_UNKNOWN -1
+/* #define ALG_DROP -2 IanO: this is in board.h, used in movecheck.c */
- matchVal = i;
-
- nomatch:;
- }
-
- if (matchVal != -1)
- return MS_ALG;
+PRIVATE int get_move_info(char *str, int *piece, int *ff, int *fr, int *tf, int *tr, int *bishconfusion)
+{
+ char tmp[1024];
+ char *s;
+ int i, j, len;
+ char c;
+ int matchVal = -1;
+ int lpiece, lff, lfr, ltf, ltr;
+
+ *bishconfusion = 0;
+ strcpy(tmp, str);
+ if ((s = index(tmp, '+'))) { /* Cut off any check marks */
+ *s = '\0';
+ }
+ if ((s = index(tmp, '='))) { /* Cut off any promotion marks */
+ *s = '\0';
+ }
+ *piece = *ff = *fr = *tf = *tr = ALG_UNKNOWN;
+ len = strlen(tmp);
+ for (i = 0; alg_list[i]; i++) {
+ lpiece = lff = lfr = ltf = ltr = ALG_UNKNOWN;
+ if (strlen(alg_list[i]) != len)
+ continue;
+ for (j = len - 1; j >= 0; j--) {
+ switch (alg_list[i][j]) {
+ case 'f':
+ if ((tmp[j] < 'a') || (tmp[j] > 'h'))
+ goto nomatch;
+ if (ltf == ALG_UNKNOWN)
+ ltf = tmp[j] - 'a';
+ else
+ lff = tmp[j] - 'a';
+ break;
+ case 'r':
+ if ((tmp[j] < '1') || (tmp[j] > '8'))
+ goto nomatch;
+ if (ltr == ALG_UNKNOWN)
+ ltr = tmp[j] - '1';
+ else
+ lfr = tmp[j] - '1';
+ break;
+ case 'p':
+ if (isupper(tmp[j]))
+ c = tolower(tmp[j]);
else
- return MS_NOTMOVE;
+ c = tmp[j];
+ if (c == 'k')
+ lpiece = KING;
+ else if (c == 'q')
+ lpiece = QUEEN;
+ else if (c == 'r')
+ lpiece = ROOK;
+ else if (c == 'b')
+ lpiece = BISHOP;
+ else if (c == 'n')
+ lpiece = KNIGHT;
+ else if (c == 'p')
+ lpiece = PAWN;
+ else
+ goto nomatch;
+ break;
+ case 'x':
+ if ((tmp[j] != 'x') && (tmp[j] != 'X'))
+ goto nomatch;
+ break;
+ case '@':
+ if (tmp[j] != '@' && tmp[j] != '*')
+ goto nomatch;
+ lff = lfr = ALG_DROP;
+ break;
+ case '#':
+ if (tmp[j] != '#')
+ goto nomatch;
+ lff = lfr = ALG_DROP;
+ break;
+ default:
+ fprintf(stderr, "Unknown character in algebraic parsing\n");
+ break;
+ }
+ }
+ if (lpiece == ALG_UNKNOWN)
+ lpiece = PAWN;
+ if (lpiece == PAWN && (lfr == ALG_UNKNOWN)) { /* ffr or ff */
+ if (lff != ALG_UNKNOWN) {
+ if (lff == ltf)
+ goto nomatch;
+ if ((lff - ltf != 1) && (ltf - lff != 1))
+ goto nomatch;
+ }
+ }
+ *piece = lpiece; /* We have a match */
+ *tf = ltf;
+ *tr = ltr;
+ *ff = lff;
+ *fr = lfr;
+ if (matchVal != -1) {
+ /* We have two matches, it must be that Bxc4 vs. bxc4 problem */
+ /* Or it could be the Bc4 vs bc4 problem */
+ *bishconfusion = 1;
+ }
+ matchVal = i;
+nomatch:;
+ }
+ if (matchVal != -1)
+ return MS_ALG;
+ else
+ return MS_NOTMOVE;
}
-PUBLIC int
-alg_is_move(char *mstr)
+PUBLIC int alg_is_move(char *mstr)
{
- int piece, ff, fr, tf, tr, bc;
+ int piece, ff, fr, tf, tr, bc;
- return get_move_info(mstr, &piece, &ff, &fr, &tf, &tr, &bc);
+ return get_move_info(mstr, &piece, &ff, &fr, &tf, &tr, &bc);
}
-/*
- * We already know it is algebraic. Get the move squares.
- */
-PUBLIC int
-alg_parse_move(char *mstr, game_state_t *gs, move_t *mt)
+/* We already know it is algebraic, get the move squares */
+PUBLIC int alg_parse_move(char *mstr, game_state_t * gs, move_t * mt)
{
- int f, r, tmpr, posf, posr, posr2;
- int piece, ff, fr, tf, tr, bc;
-
- if (get_move_info(mstr, &piece, &ff, &fr, &tf, &tr, &bc) != MS_ALG) {
- fprintf(stderr, "FICS: Shouldn't try to algebraically parse "
- "non-algebraic move string.\n");
- return MOVE_ILLEGAL;
- }
-
- if (tf == ALG_UNKNOWN)
- return MOVE_AMBIGUOUS; /* Must always know to file */
-
- if (tr == ALG_UNKNOWN) {
- posr = posr2 = ALG_UNKNOWN;
-
- if (piece != PAWN)
- return MOVE_AMBIGUOUS;
- if (ff == ALG_UNKNOWN)
- return MOVE_AMBIGUOUS;
-
- /*
- * Need to find pawn on ff that can take to tf and
- * fill in ranks.
- */
- for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
- NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
- if (ff != ALG_UNKNOWN && ff != f)
- continue;
- if (piecetype(gs->board[f][r]) != piece)
- continue;
-
- if (gs->onMove == WHITE) {
- tmpr = r + 1;
- } else {
- tmpr = r - 1;
- }
-
- if (gs->board[tf][tmpr] == NOPIECE) {
- const int is_black = (gs->onMove == WHITE ?
- 0 : 1);
-
- if (gs->ep_possible[is_black][ff] != (tf - ff))
- continue;
- } else {
- if (iscolor(gs->board[tf][tmpr], gs->onMove))
- continue;
- }
-
- if (legal_andcheck_move(gs, f, r, tf, tmpr)) {
- if (posr != ALG_UNKNOWN && posr2 != ALG_UNKNOWN)
- return MOVE_AMBIGUOUS;
-
- posr = tmpr;
- posr2 = r;
- }
- }
-
- tr = posr;
- fr = posr2;
- } else if (bc) { /* Could be bxc4 or Bxc4, tr is known. */
- ff = ALG_UNKNOWN;
- fr = ALG_UNKNOWN;
-
- for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
- NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
- if (piecetype(gs->board[f][r]) != PAWN &&
- piecetype(gs->board[f][r]) != BISHOP)
- continue;
- if (legal_andcheck_move(gs, f, r, tf, tr)) {
- if (piecetype(gs->board[f][r]) == PAWN &&
- f != 1)
- continue;
- if (ff != ALG_UNKNOWN && fr != ALG_UNKNOWN)
- return (MOVE_AMBIGUOUS);
-
- ff = f;
- fr = r;
- }
- }
- } else { /* The from position is unknown */
- posf = ALG_UNKNOWN;
- posr = ALG_UNKNOWN;
-
- if (ff == ALG_UNKNOWN || fr == ALG_UNKNOWN) {
- /*
- * Need to find a piece that can go to tf, tr.
- */
- for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
- NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
- if (ff != ALG_UNKNOWN && ff != f)
- continue;
- if (fr != ALG_UNKNOWN && fr != r)
- continue;
- if (piecetype(gs->board[f][r]) != piece)
- continue;
-
- if (legal_andcheck_move(gs, f, r, tf, tr)) {
- if (posf != ALG_UNKNOWN &&
- posr != ALG_UNKNOWN)
- return MOVE_AMBIGUOUS;
-
- posf = f;
- posr = r;
- }
- }
- } else if (ff == ALG_DROP) {
- if (legal_andcheck_move(gs, ALG_DROP, piece, tf, tr)) {
- posf = ALG_DROP;
- posr = piece;
- }
- }
-
- ff = posf;
- fr = posr;
+ int f, r, tmpr, posf, posr, posr2;
+ int piece, ff, fr, tf, tr, bc;
+
+ if (get_move_info(mstr, &piece, &ff, &fr, &tf, &tr, &bc) != MS_ALG) {
+ fprintf(stderr, "FICS: Shouldn't try to algebraicly parse non-algabraic move string.\n");
+ return MOVE_ILLEGAL;
+ }
+ /* Resolve ambiguities in to-ness */
+ if (tf == ALG_UNKNOWN)
+ return MOVE_AMBIGUOUS; /* Must always know to file */
+ if (tr == ALG_UNKNOWN) {
+ posr = posr2 = ALG_UNKNOWN;
+ if (piece != PAWN)
+ return MOVE_AMBIGUOUS;
+ if (ff == ALG_UNKNOWN)
+ return MOVE_AMBIGUOUS;
+ /* Need to find pawn on ff that can take to tf and fill in ranks */
+ for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
+ NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
+ if ((ff != ALG_UNKNOWN) && (ff != f))
+ continue;
+ if (piecetype(gs->board[f][r]) != piece)
+ continue;
+ if (gs->onMove == WHITE) {
+ tmpr = r + 1;
+ } else {
+ tmpr = r - 1;
+ }
+/* if ((gs->board[tf][tmpr] == NOPIECE) ||
+ (iscolor(gs->board[tf][tmpr], gs->onMove))) continue;*/
+/* patch from Soso, added by Sparky 3/16/95 */
+ if (gs->board[tf][tmpr] == NOPIECE) {
+ if ((gs->ep_possible[((gs->onMove == WHITE) ? 0 : 1)][ff]) != (tf - ff))
+ continue;
+ } else {
+ if (iscolor(gs->board[tf][tmpr], gs->onMove))
+ continue;
+ }
+
+ if (legal_andcheck_move(gs, f, r, tf, tmpr)) {
+ if ((posr != ALG_UNKNOWN) && (posr2 != ALG_UNKNOWN))
+ return MOVE_AMBIGUOUS;
+ posr = tmpr;
+ posr2 = r;
+ }
+ }
+ tr = posr;
+ fr = posr2;
+ } else if (bc) { /* Could be bxc4 or Bxc4, tr is known */
+ ff = ALG_UNKNOWN;
+ fr = ALG_UNKNOWN;
+ for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
+ NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
+ if ((piecetype(gs->board[f][r]) != PAWN) && (piecetype(gs->board[f][r]) != BISHOP))
+ continue;
+ if (legal_andcheck_move(gs, f, r, tf, tr)) {
+ if ((piecetype(gs->board[f][r]) == PAWN) && (f != 1))
+ continue;
+ if ((ff != ALG_UNKNOWN) && (fr != ALG_UNKNOWN))
+ return (MOVE_AMBIGUOUS);
+ ff = f;
+ fr = r;
+ }
+ }
+ } else { /* The from position is unknown */
+ posf = ALG_UNKNOWN;
+ posr = ALG_UNKNOWN;
+ if ((ff == ALG_UNKNOWN) || (fr == ALG_UNKNOWN)) {
+ /* Need to find a piece that can go to tf, tr */
+ for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
+ NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
+ if ((ff != ALG_UNKNOWN) && (ff != f))
+ continue;
+ if ((fr != ALG_UNKNOWN) && (fr != r))
+ continue;
+ if (piecetype(gs->board[f][r]) != piece)
+ continue;
+ if (legal_andcheck_move(gs, f, r, tf, tr)) {
+ if ((posf != ALG_UNKNOWN) && (posr != ALG_UNKNOWN))
+ return MOVE_AMBIGUOUS;
+ posf = f;
+ posr = r;
}
-
- if (tf == ALG_UNKNOWN || tr == ALG_UNKNOWN || ff == ALG_UNKNOWN ||
- fr == ALG_UNKNOWN)
- return MOVE_ILLEGAL;
-
- mt->fromFile = ff;
- mt->fromRank = fr;
- mt->toFile = tf;
- mt->toRank = tr;
-
- return MOVE_OK;
+ }
+ } else if (ff == ALG_DROP) {
+ if (legal_andcheck_move(gs, ALG_DROP, piece, tf, tr)) {
+ posf = ALG_DROP;
+ posr = piece;
+ }
+ }
+ ff = posf;
+ fr = posr;
+ }
+ if ((tf == ALG_UNKNOWN) || (tr == ALG_UNKNOWN) ||
+ (ff == ALG_UNKNOWN) || (fr == ALG_UNKNOWN))
+ return MOVE_ILLEGAL;
+ mt->fromFile = ff;
+ mt->fromRank = fr;
+ mt->toFile = tf;
+ mt->toRank = tr;
+ return MOVE_OK;
}
-PRIVATE void
-not_pawn(game_state_t *gs, move_t *mt, game_state_t *fakeMove, const int piece,
- char *tmp, char *mStr, size_t tmp_size, size_t mStr_size)
+/* A assumes the move has yet to be made on the board */
+/* this is the old stupid function, we are testing one from soso...
+PUBLIC char *alg_unparse( game_state_t *gs, move_t *mt )
{
- int ambig, r_ambig, f_ambig;
-
- ambig = r_ambig = f_ambig = 0;
-
- for (int r = 0; r < 8; r++) {
- for (int f = 0; f < 8; f++) {
- if (gs->board[f][r] != NOPIECE &&
- iscolor(gs->board[f][r], gs->onMove) &&
- piecetype(gs->board[f][r]) == piece &&
- (f != mt->fromFile || r != mt->fromRank)) {
- if (legal_move(gs, f, r, mt->toFile,
- mt->toRank)) {
- fakeMove = gs;
- fakeMove->board[f][r] = NOPIECE;
- fakeMove->onMove =
- CToggle(fakeMove->onMove);
- gs->onMove = CToggle(gs->onMove);
-
- /*
- * New bracketing below to try
- * to fix 'ambiguous move'
- * bug.
- */
-
- if (in_check(gs) || !in_check(fakeMove))
- ambig++;
-
- if (f == mt->fromFile) {
- f_ambig++;
- ambig++;
- }
- if (r == mt->fromRank) {
- r_ambig++;
- ambig++;
- }
-
- gs->onMove = CToggle(gs->onMove);
- }
- }
- } /* for */
- } /* for */
-
- if (ambig > 0) {
- /*
- * Ambiguity in short notation. Need to add file, rank
- * or _both_ in notation.
- */
-
- if (f_ambig == 0) {
- snprintf(tmp, tmp_size, "%c", (mt->fromFile + 'a'));
- strlcat(mStr, tmp, mStr_size);
- } else if (r_ambig == 0) {
- snprintf(tmp, tmp_size, "%d", (mt->fromRank + 1));
- strlcat(mStr, tmp, mStr_size);
- } else {
- snprintf(tmp, tmp_size, "%c%d",
- (mt->fromFile + 'a'),
- (mt->fromRank + 1));
- strlcat(mStr, tmp, mStr_size);
- }
- }
+ static char mStr[20];
+
+ if ((piecetype(gs->board[mt->fromFile][mt->fromRank]) == KING) &&
+ ((mt->fromFile == 4) && (mt->toFile == 6)) )
+ return "o-o";
+ if ((piecetype(gs->board[mt->fromFile][mt->fromRank]) == KING) &&
+ ((mt->fromFile == 4) && (mt->toFile == 2)) )
+ return "o-o-o";
+
+ sprintf( mStr, "%c%d%c%d", mt->fromFile+'a', mt->fromRank+1,
+ mt->toFile+'a', mt->toRank+1 );
+ return mStr;
}
+*/
-/*
- * Soso: rewrote alg_unparse function. Algebraic deparser - sets the
- * 'mStr' variable with move description in short notation. Used in
- * last move report and in 'moves' command.
- */
-PUBLIC char *
-alg_unparse(game_state_t *gs, move_t *mt)
-{
- char tmp[20] = { '\0' };
- game_state_t fakeMove;
- int piece;
- size_t ret = 0;
- static char mStr[20] = { '\0' };
-
- if (mt->fromFile == ALG_DROP) {
- piece = mt->fromRank;
- } else {
- piece = piecetype(gs->board[mt->fromFile][mt->fromRank]);
- }
-
- if (piece == KING && (mt->fromFile == 4 && mt->toFile == 6)) {
- strlcpy(mStr, "O-O", sizeof mStr);
- goto check;
- }
-
- if (piece == KING && (mt->fromFile == 4 && mt->toFile == 2)) {
- strlcpy(mStr, "O-O-O", sizeof mStr);
- goto check;
- }
-
- mStr[0] = '\0';
-
- switch (piece) {
- case PAWN:
- if (mt->fromFile == ALG_DROP) {
- strlcpy(mStr, "P", sizeof mStr);
- } else if (mt->fromFile != mt->toFile) {
- snprintf(tmp, sizeof tmp, "%c", (mt->fromFile + 'a'));
- strlcpy(mStr, tmp, sizeof mStr);
- }
- break;
- case KNIGHT:
- strlcpy(mStr, "N", sizeof mStr);
- break;
- case BISHOP:
- strlcpy(mStr, "B", sizeof mStr);
- break;
- case ROOK:
- strlcpy(mStr, "R", sizeof mStr);
- break;
- case QUEEN:
- strlcpy(mStr, "Q", sizeof mStr);
- break;
- case KING:
- strlcpy(mStr, "K", sizeof mStr);
- break;
- default:
- strlcpy(mStr, "", sizeof mStr);
- break;
- } /* switch */
-
- if (mt->fromFile == ALG_DROP) {
- strlcat(mStr, DROP_STR, sizeof mStr);
- } else {
- /*
- * Checks for ambiguity in short notation (Ncb3, R8e8
- * or so.)
- */
-
- if (piece != PAWN) {
- not_pawn(gs, mt, &fakeMove, piece, &tmp[0], &mStr[0],
- sizeof tmp, sizeof mStr);
- } /* not pawn */
-
- if (gs->board[mt->toFile][mt->toRank] != NOPIECE ||
- (piece == PAWN && mt->fromFile != mt->toFile))
- strlcat(mStr, "x", sizeof mStr);
- }
-
- snprintf(tmp, sizeof tmp, "%c%d", (mt->toFile + 'a'), (mt->toRank + 1));
- ret = strlcat(mStr, tmp, sizeof mStr);
-
- if (ret >= sizeof mStr) {
- fprintf(stderr, "FICS: %s (line %d): warning: "
- "strlcat() truncated\n", __func__, __LINE__);
- }
-
- if (piece == PAWN && mt->piecePromotionTo != NOPIECE) {
- strlcat(mStr, "=", sizeof mStr); /* = before promoting piece */
-
- switch (piecetype(mt->piecePromotionTo)) {
- case KNIGHT:
- strlcat(mStr, "N", sizeof mStr);
- break;
- case BISHOP:
- strlcat(mStr, "B", sizeof mStr);
- break;
- case ROOK:
- strlcat(mStr, "R", sizeof mStr);
- break;
- case QUEEN:
- strlcat(mStr, "Q", sizeof mStr);
- break;
- default:
- break;
- }
- }
- check:;
+/* A assumes the move has yet to be made on the board */
- fakeMove = *gs;
- execute_move(&fakeMove, mt, 0);
- fakeMove.onMove = CToggle(fakeMove.onMove);
- if (in_check(&fakeMove)) {
- ret = strlcat(mStr, "+", sizeof mStr);
+/* Soso: rewrote alg_unparse function.
+ * Algebraic deparser - sets the mStr variable with move description
+ * in short notation. Used in last move report and in 'moves' command.
+ */
- if (ret >= sizeof mStr) {
- fprintf(stderr, "FICS: %s (line %d): warning: "
- "strlcat() truncated\n", __func__, __LINE__);
- }
+PUBLIC char *alg_unparse(game_state_t * gs, move_t * mt)
+{
+ static char mStr[20];
+ char tmp[20];
+ int piece, f, r;
+ int ambig, r_ambig, f_ambig;
+ game_state_t fakeMove;
+
+ if (mt->fromFile == ALG_DROP) {
+ piece = mt->fromRank;
+ } else {
+ piece = piecetype(gs->board[mt->fromFile][mt->fromRank]);
+ }
+
+ if ((piece == KING) && ((mt->fromFile == 4) && (mt->toFile == 6))) {
+ strcpy(mStr, "O-O");
+ goto check;
+ }
+ if ((piece == KING) && ((mt->fromFile == 4) && (mt->toFile == 2))) {
+ strcpy(mStr, "O-O-O");
+ goto check;
+ }
+ strcpy(mStr, "");
+ switch (piece) {
+ case PAWN:
+ if (mt->fromFile == ALG_DROP) {
+ strcpy(mStr,"P");
+ } else if (mt->fromFile != mt->toFile) {
+ sprintf(tmp, "%c", mt->fromFile + 'a');
+ strcpy(mStr, tmp);
+ }
+ break;
+ case KNIGHT:
+ strcpy(mStr, "N");
+ break;
+ case BISHOP:
+ strcpy(mStr, "B");
+ break;
+ case ROOK:
+ strcpy(mStr, "R");
+ break;
+ case QUEEN:
+ strcpy(mStr, "Q");
+ break;
+ case KING:
+ strcpy(mStr, "K");
+ break;
+ default:
+ strcpy(mStr, "");
+ break;
+ }
+
+ if (mt->fromFile == ALG_DROP) {
+ strcat(mStr, DROP_STR);
+ } else {
+ /* Checks for ambiguity in short notation ( Ncb3, R8e8 or so) */
+ if (piece != PAWN) {
+ ambig = r_ambig = f_ambig = 0;
+ for (r = 0; r < 8; r++)
+ for (f = 0; f < 8; f++) {
+ if ((gs->board[f][r] != NOPIECE) && iscolor(gs->board[f][r], gs->onMove)
+ && (piecetype(gs->board[f][r]) == piece) &&
+ ((f != mt->fromFile) || (r != mt->fromRank))) {
+ if (legal_move(gs, f, r, mt->toFile, mt->toRank)) {
+ fakeMove = *gs;
+ fakeMove.board[f][r] = NOPIECE;
+ fakeMove.onMove = CToggle(fakeMove.onMove);
+ gs->onMove = CToggle(gs->onMove);
+
+ /* New bracketing below to try to fix 'ambiguous move' bug. */
+ if ((in_check(gs)) || !in_check(&fakeMove)) {
+ ambig++;
+ }
+ if (f == mt->fromFile) {
+ f_ambig++;
+ ambig++;
+ }
+ if (r == mt->fromRank) {
+ r_ambig++;
+ ambig++;
+ }
+ gs->onMove = CToggle(gs->onMove);
+ }
}
-
- return mStr;
+ }
+ if (ambig > 0) {
+ /* Ambiguity in short notation, need to add file,rank or _both_ in
+ notation */
+ if (f_ambig == 0) {
+ sprintf(tmp, "%c", mt->fromFile + 'a');
+ strcat(mStr, tmp);
+ } else if (r_ambig == 0) {
+ sprintf(tmp, "%d", mt->fromRank + 1);
+ strcat(mStr, tmp);
+ } else {
+ sprintf(tmp, "%c%d", mt->fromFile + 'a', mt->fromRank + 1);
+ strcat(mStr, tmp);
+ }
+ }
+ }
+ if ((gs->board[mt->toFile][mt->toRank] != NOPIECE) ||
+ ((piece == PAWN) && (mt->fromFile != mt->toFile))) {
+ strcat(mStr, "x");
+ }
+ }
+ sprintf(tmp, "%c%d", mt->toFile + 'a', mt->toRank + 1);
+ strcat(mStr, tmp);
+
+ if ((piece == PAWN) && (mt->piecePromotionTo != NOPIECE)) {
+ strcat(mStr, "="); /* = before promoting piece */
+ switch (piecetype(mt->piecePromotionTo)) {
+ case KNIGHT:
+ strcat(mStr, "N");
+ break;
+ case BISHOP:
+ strcat(mStr, "B");
+ break;
+ case ROOK:
+ strcat(mStr, "R");
+ break;
+ case QUEEN:
+ strcat(mStr, "Q");
+ break;
+ default:
+ break;
+ }
+ }
+check:;
+ fakeMove = *gs;
+ execute_move(&fakeMove, mt, 0);
+ fakeMove.onMove = CToggle(fakeMove.onMove);
+ if (in_check(&fakeMove)) {
+ strcat(mStr, "+");
+ }
+ return mStr;
}
diff --git a/FICS/algcheck.h b/FICS/algcheck.h
index 8f7bda7..60d971b 100644
--- a/FICS/algcheck.h
+++ b/FICS/algcheck.h
@@ -29,13 +29,13 @@
#include "board.h"
#endif
-#define ALG_UNKNOWN -1
+#define DROP_CHAR '@' /* used by algcheck.c and movecheck.c */
+#define DROP_STR "@"
-#define DROP_CHAR '@' /* used by algcheck.c and movecheck.c */
-#define DROP_STR "@"
+extern int alg_is_move(char *);
+extern int alg_parse_move(char *, game_state_t *, move_t *);
+extern char *alg_unparse(game_state_t *, move_t *);
-extern char *alg_unparse(game_state_t *, move_t *);
-extern int alg_is_move(char *);
-extern int alg_parse_move(char *, game_state_t *, move_t *);
+/* extern int tolower(); */
#endif /* _ALGCHECK_H */
diff --git a/FICS/movecheck.c b/FICS/movecheck.c
index 872814a..3cb109f 100644
--- a/FICS/movecheck.c
+++ b/FICS/movecheck.c
@@ -23,760 +23,631 @@
Markus Uhlin 23/12/14 Fixed compiler warnings
Markus Uhlin 23/12/17 Fixed compiler warnings
Markus Uhlin 23/12/24 Fixed dead assignment
- Markus Uhlin 24/03/16 Refactored and reformatted
- functions.
- Markus Uhlin 24/03/17 Replaced sprintf() calls
*/
#include "stdinclude.h"
-#include "common.h"
#include "algcheck.h"
#include "board.h"
+#include "common.h"
#include "gamedb.h"
#include "movecheck.h"
#include "network.h"
#include "playerdb.h"
#include "utils.h"
-#if __linux__
-#include <bsd/string.h>
-#endif
-
-/*
- * Simply tests if the input string is a move or not. If it matches
- * patterns below. Add to this list as you improve the move parser.
- *
- * - MS_COMP e2e4
- * - MS_COMPDASH e2-e4
- * - MS_CASTLE o-o, o-o-o
- *
- * Not done yet
- * MS_ALG e4, Nd5 Ncd5
- */
-PUBLIC int
-is_move(char *mstr)
+/* Simply tests if the input string is a move or not. */
+/* If it matches patterns below */
+/* Add to this list as you improve the move parser */
+/* MS_COMP e2e4 */
+/* MS_COMPDASH e2-e4 */
+/* MS_CASTLE o-o, o-o-o */
+/* Not done yet */
+/* MS_ALG e4, Nd5 Ncd5 */
+PUBLIC int is_move(char *mstr)
{
- int len = strlen(mstr);
-
- if (len > 3 && mstr[len - 2] == '=')
- len -= 2;
-
- if (len == 4) { // Test for e2e4
- if (isfile(mstr[0]) && isrank(mstr[1]) &&
- isfile(mstr[2]) && isrank(mstr[3]))
- return MS_COMP;
- }
-
- if (len == 5) { // Test for e2-e4
- if (isfile(mstr[0]) &&
- isrank(mstr[1]) &&
- mstr[2] == '-' &&
- isfile(mstr[3]) &&
- isrank(mstr[4]))
- return MS_COMPDASH;
- }
-
- if (len == 3) { // Test for o-o
- if (mstr[0] == 'o' && mstr[1] == '-' && mstr[2] == 'o')
- return MS_KCASTLE;
- if (mstr[0] == 'O' && mstr[1] == '-' && mstr[2] == 'O')
- return MS_KCASTLE;
- if (mstr[0] == '0' && mstr[1] == '-' && mstr[2] == '0')
- return MS_KCASTLE;
- }
-
- if (len == 2) { // Test for oo
- if (mstr[0] == 'o' && mstr[1] == 'o')
- return MS_KCASTLE;
- if (mstr[0] == 'O' && mstr[1] == 'O')
- return MS_KCASTLE;
- if (mstr[0] == '0' && mstr[1] == '0')
- return MS_KCASTLE;
- }
-
- if (len == 5) { // Test for o-o-o
- if (mstr[0] == 'o' && mstr[1] == '-' && mstr[2] == 'o' &&
- mstr[3] == '-' && mstr[4] == 'o')
- return MS_QCASTLE;
- if (mstr[0] == 'O' && mstr[1] == '-' && mstr[2] == 'O' &&
- mstr[3] == '-' && mstr[4] == 'O')
- return MS_QCASTLE;
- if (mstr[0] == '0' && mstr[1] == '-' && mstr[2] == '0' &&
- mstr[3] == '-' && mstr[4] == '0')
- return MS_QCASTLE;
- }
-
- if (len == 3) { // Test for ooo
- if (mstr[0] == 'o' && mstr[1] == 'o' && mstr[2] == 'o')
- return MS_QCASTLE;
- if (mstr[0] == 'O' && mstr[1] == 'O' && mstr[2] == 'O')
- return MS_QCASTLE;
- if (mstr[0] == '0' && mstr[1] == '0' && mstr[2] == '0')
- return MS_QCASTLE;
- }
-
- return alg_is_move(mstr);
+ int len = strlen(mstr);
+ if ((len > 3) && (mstr[len - 2] == '='))
+ len -= 2;
+
+ if (len == 4) { /* Test for e2e4 */
+ if (isfile(mstr[0]) && isrank(mstr[1]) &&
+ isfile(mstr[2]) && isrank(mstr[3])) {
+ return MS_COMP;
+ }
+ }
+ if (len == 5) { /* Test for e2-e4 */
+ if (isfile(mstr[0]) && isrank(mstr[1]) &&
+ (mstr[2] == '-') &&
+ isfile(mstr[3]) && isrank(mstr[4])) {
+ return MS_COMPDASH;
+ }
+ }
+ if (len == 3) { /* Test for o-o */
+ if ((mstr[0] == 'o') && (mstr[1] == '-') && (mstr[2] == 'o')) {
+ return MS_KCASTLE;
+ }
+ if ((mstr[0] == 'O') && (mstr[1] == '-') && (mstr[2] == 'O')) {
+ return MS_KCASTLE;
+ }
+ if ((mstr[0] == '0') && (mstr[1] == '-') && (mstr[2] == '0')) {
+ return MS_KCASTLE;
+ }
+ }
+ if (len == 2) { /* Test for oo */
+ if ((mstr[0] == 'o') && (mstr[1] == 'o')) {
+ return MS_KCASTLE;
+ }
+ if ((mstr[0] == 'O') && (mstr[1] == 'O')) {
+ return MS_KCASTLE;
+ }
+ if ((mstr[0] == '0') && (mstr[1] == '0')) {
+ return MS_KCASTLE;
+ }
+ }
+ if (len == 5) { /* Test for o-o-o */
+ if ((mstr[0] == 'o') && (mstr[1] == '-') && (mstr[2] == 'o') && (mstr[3] == '-') && (mstr[4] == 'o')) {
+ return MS_QCASTLE;
+ }
+ if ((mstr[0] == 'O') && (mstr[1] == '-') && (mstr[2] == 'O') && (mstr[3] == '-') && (mstr[4] == 'O')) {
+ return MS_QCASTLE;
+ }
+ if ((mstr[0] == '0') && (mstr[1] == '-') && (mstr[2] == '0') && (mstr[3] == '-') && (mstr[4] == '0')) {
+ return MS_QCASTLE;
+ }
+ }
+ if (len == 3) { /* Test for ooo */
+ if ((mstr[0] == 'o') && (mstr[1] == 'o') && (mstr[2] == 'o')) {
+ return MS_QCASTLE;
+ }
+ if ((mstr[0] == 'O') && (mstr[1] == 'O') && (mstr[2] == 'O')) {
+ return MS_QCASTLE;
+ }
+ if ((mstr[0] == '0') && (mstr[1] == '0') && (mstr[2] == '0')) {
+ return MS_QCASTLE;
+ }
+ }
+ return alg_is_move(mstr);
}
-PUBLIC int
-NextPieceLoop(board_t b, int *f, int *r, int color)
-{
- while (1) {
- (*r) = (*r) + 1;
-
- if (*r > 7) {
- *r = 0;
- *f = *f + 1;
-
- if (*f > 7)
- break;
- }
- if (b[*f][*r] != NOPIECE && iscolor(b[*f][*r], color))
- return 1;
- }
-
- return 0;
+PUBLIC int NextPieceLoop(board_t b, int *f, int *r, int color)
+{
+ while (1) {
+ (*r) = (*r) + 1;
+ if (*r > 7) {
+ *r = 0;
+ *f = *f + 1;
+ if (*f > 7)
+ break;
+ }
+ if ((b[*f][*r] != NOPIECE) && iscolor(b[*f][*r], color))
+ return 1;
+ }
+ return 0;
}
-PUBLIC int
-InitPieceLoop(board_t b, int *f, int *r, int color)
+PUBLIC int InitPieceLoop(board_t b, int *f, int *r, int color)
{
- *f = 0;
- *r = -1;
-
- /* XXX: not referenced */
- (void) b;
- (void) color;
- return 1;
+ *f = 0;
+ *r = -1;
+ return 1;
}
-/*
- * All of the routines assume that the obvious problems have been
- * checked. See legal_move().
- */
-PRIVATE int
-legal_pawn_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+/* All of the routines assume that the obvious problems have been checked */
+/* See legal_move() */
+PRIVATE int legal_pawn_move( game_state_t *gs, int ff, int fr, int tf, int tr )
{
- if (ff == tf) {
- if (gs->board[tf][tr] != NOPIECE)
- return 0;
-
- if (gs->onMove == WHITE) {
- if (tr - fr == 1)
- return 1;
- if (fr == 1 &&
- (tr - fr) == 2 &&
- gs->board[ff][2] == NOPIECE)
- return 1;
- } else {
- if (fr - tr == 1)
- return 1;
- if (fr == 6 &&
- (fr - tr) == 2 &&
- gs->board[ff][5] == NOPIECE)
- return 1;
- }
-
- return 0;
- }
-
- if (ff != tf) { // Capture ?
- if ((ff - tf) != 1 && (tf - ff) != 1)
- return 0;
- if ((fr - tr) != 1 && (tr - fr) != 1)
- return 0;
-
- if (gs->onMove == WHITE) {
- if (fr > tr)
- return 0;
- if (gs->board[tf][tr] != NOPIECE &&
- iscolor(gs->board[tf][tr], BLACK))
- return 1;
-
- if (gs->ep_possible[0][ff] == 1) {
- if (tf == (ff + 1) && gs->board[ff + 1][fr] ==
- B_PAWN)
- return 1;
- } else if (gs->ep_possible[0][ff] == -1) {
- if (tf == (ff - 1) && gs->board[ff - 1][fr] ==
- B_PAWN)
- return 1;
- }
- } else {
- if (tr > fr)
- return 0;
- if (gs->board[tf][tr] != NOPIECE &&
- iscolor(gs->board[tf][tr], WHITE))
- return 1;
-
- if (gs->ep_possible[1][ff] == 1) {
- if (tf == (ff + 1) && gs->board[ff + 1][fr] ==
- W_PAWN)
- return 1;
- } else if (gs->ep_possible[1][ff] == -1) {
- if (tf == (ff - 1) && gs->board[ff - 1][fr] ==
- W_PAWN)
- return 1;
- }
- }
- }
-
- return 0;
+ if (ff == tf) {
+ if (gs->board[tf][tr] != NOPIECE) return 0;
+ if (gs->onMove == WHITE) {
+ if (tr - fr == 1) return 1;
+ if ((fr == 1) && (tr - fr == 2) && gs->board[ff][2]==NOPIECE) return 1;
+ } else {
+ if (fr - tr == 1) return 1;
+ if ((fr == 6) && (fr - tr == 2) && gs->board[ff][5]==NOPIECE) return 1;
+ }
+ return 0;
+ }
+ if (ff != tf) { /* Capture ? */
+ if ((ff - tf != 1) && (tf - ff != 1)) return 0;
+ if ((fr - tr != 1) && (tr - fr != 1)) return 0;
+ if (gs->onMove == WHITE) {
+ if (fr > tr) return 0;
+ if ((gs->board[tf][tr] != NOPIECE) && iscolor(gs->board[tf][tr],BLACK))
+ return 1;
+ if (gs->ep_possible[0][ff] == 1) {
+ if ((tf==ff+1) && (gs->board[ff+1][fr] == B_PAWN)) return 1;
+ } else if (gs->ep_possible[0][ff] == -1) {
+ if ((tf==ff-1) && (gs->board[ff-1][fr] == B_PAWN)) return 1;
+ }
+ } else {
+ if (tr > fr) return 0;
+ if ((gs->board[tf][tr] != NOPIECE) && iscolor(gs->board[tf][tr],WHITE))
+ return 1;
+ if (gs->ep_possible[1][ff] == 1) {
+ if ((tf==ff+1) && (gs->board[ff+1][fr] == W_PAWN)) return 1;
+ } else if (gs->ep_possible[1][ff] == -1) {
+ if ((tf==ff-1) && (gs->board[ff-1][fr] == W_PAWN)) return 1;
+ }
+ }
+ }
+ return 0;
}
-PRIVATE int
-legal_knight_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+PRIVATE int legal_knight_move(game_state_t * gs, int ff, int fr, int tf, int tr)
{
- int dx, dy;
-
- dx = ff - tf;
- dy = fr - tr;
-
- if (dx == 2 || dx == -2) {
- if (dy == -1 || dy == 1)
- return 1;
- }
- if (dy == 2 || dy == -2) {
- if (dx == -1 || dx == 1)
- return 1;
- }
-
- return 0;
+ int dx, dy;
+
+ dx = ff - tf;
+ dy = fr - tr;
+ if ((dx == 2) || (dx == -2)) {
+ if ((dy == -1) || (dy == 1))
+ return 1;
+ }
+ if ((dy == 2) || (dy == -2)) {
+ if ((dx == -1) || (dx == 1))
+ return 1;
+ }
+ return 0;
}
-PRIVATE int
-legal_bishop_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+PRIVATE int legal_bishop_move(game_state_t * gs, int ff, int fr, int tf, int tr)
{
- int count;
- int dx, dy, x, y;
- int incx, incy;
- int startx, starty;
-
- if (ff > tf) {
- dx = ff - tf;
- incx = -1;
- } else {
- dx = tf - ff;
- incx = 1;
- }
-
- startx = ff + incx;
-
- if (fr > tr) {
- dy = fr - tr;
- incy = -1;
- } else {
- dy = tr - fr;
- incy = 1;
- }
-
- starty = fr + incy;
-
- if (dx != dy)
- return 0; // Not diagonal
- if (dx == 1)
- return 1; // One square, ok.
-
- count = dx - 1;
- x = startx;
- y = starty;
-
- while (count) {
- if (gs->board[x][y] != NOPIECE)
- return 0;
- x += incx;
- y += incy;
- count--;
- }
-
- return 1;
+ int dx, dy, x, y;
+ int startx, starty;
+ int count;
+ int incx, incy;
+
+ if (ff > tf) {
+ dx = ff - tf;
+ incx = -1;
+ } else {
+ dx = tf - ff;
+ incx = 1;
+ }
+ startx = ff + incx;
+ if (fr > tr) {
+ dy = fr - tr;
+ incy = -1;
+ } else {
+ dy = tr - fr;
+ incy = 1;
+ }
+ starty = fr + incy;
+ if (dx != dy)
+ return 0; /* Not diagonal */
+ if (dx == 1)
+ return 1; /* One square, ok */
+ count = dx - 1;
+ for (x = startx, y = starty; count; x += incx, y += incy, count--) {
+ if (gs->board[x][y] != NOPIECE)
+ return 0;
+ }
+ return 1;
}
-PRIVATE int
-legal_rook_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+PRIVATE int legal_rook_move(game_state_t * gs, int ff, int fr, int tf, int tr)
{
- int i;
- int start, stop;
-
- if (ff == tf) {
- if ((fr - tr) == 1 || (tr - fr) == 1)
- return 1;
- if (fr < tr) {
- start = fr + 1;
- stop = tr - 1;
- } else {
- start = tr + 1;
- stop = fr - 1;
- }
-
- for (i = start; i <= stop; i++) {
- if (gs->board[ff][i] != NOPIECE)
- return 0;
- }
-
- return 1;
- } else if (fr == tr) {
- if ((ff - tf) == 1 || (tf - ff) == 1)
- return 1;
- if (ff < tf) {
- start = ff + 1;
- stop = tf - 1;
- } else {
- start = tf + 1;
- stop = ff - 1;
- }
-
- for (i = start; i <= stop; i++) {
- if (gs->board[i][fr] != NOPIECE)
- return 0;
- }
-
- return 1;
- }
-
+ int i;
+ int start, stop;
+
+ if (ff == tf) {
+ if (((fr - tr) == 1) || ((tr - fr) == 1))
+ return 1;
+ if (fr < tr) {
+ start = fr + 1;
+ stop = tr - 1;
+ } else {
+ start = tr + 1;
+ stop = fr - 1;
+ }
+ for (i = start; i <= stop; i++) {
+ if (gs->board[ff][i] != NOPIECE)
+ return 0;
+ }
+ return 1;
+ } else if (fr == tr) {
+ if (((ff - tf) == 1) || ((tf - ff) == 1))
+ return 1;
+ if (ff < tf) {
+ start = ff + 1;
+ stop = tf - 1;
+ } else {
+ start = tf + 1;
+ stop = ff - 1;
+ }
+ for (i = start; i <= stop; i++) {
+ if (gs->board[i][fr] != NOPIECE)
return 0;
+ }
+ return 1;
+ } else {
+ return 0;
+ }
}
-PRIVATE int
-legal_queen_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+PRIVATE int legal_queen_move(game_state_t * gs, int ff, int fr, int tf, int tr)
{
- return (legal_rook_move(gs, ff, fr, tf, tr) ||
- legal_bishop_move(gs, ff, fr, tf, tr));
+ return legal_rook_move(gs, ff, fr, tf, tr) || legal_bishop_move(gs, ff, fr, tf, tr);
}
-PRIVATE int
-is_square_attacked(game_state_t *gs, int kf, int kr)
-{
- game_state_t fakeMove;
-
- fakeMove = *gs;
- fakeMove.board[4][kr] = NOPIECE;
- fakeMove.board[kf][kr] = (KING | fakeMove.onMove);
- fakeMove.onMove = CToggle(fakeMove.onMove);
+/* Ckeck, if square (kf,kr) is attacked by enemy piece.
+ * Used in castling from/through check testing.
+ */
- if (in_check(&fakeMove))
- return 1;
- return 0;
+/* new one from soso: */
+PRIVATE int is_square_attacked (game_state_t *gs, int kf, int kr)
+{
+ game_state_t fakeMove;
+
+ fakeMove = *gs;
+ fakeMove.board[4][kr] = NOPIECE;
+ fakeMove.board[kf][kr] = KING | fakeMove.onMove;
+ fakeMove.onMove = CToggle (fakeMove.onMove);
+ if (in_check(&fakeMove)) return 1;
+ else return 0;
}
-PRIVATE int
-legal_king_move(game_state_t *gs, int ff, int fr, int tf, int tr)
+/* old one:
+PRIVATE int is_square_attacked(game_state_t * gs, int kf, int kr)
{
- if (gs->onMove == WHITE) {
- /* King side castling */
- if (fr == 0 && tr == 0 && ff == 4 && tf == 6 &&
- !gs->wkmoved &&
- !gs->wkrmoved &&
- gs->board[5][0] == NOPIECE &&
- gs->board[6][0] == NOPIECE &&
- gs->board[7][0] == W_ROOK &&
- !is_square_attacked(gs, 4, 0) &&
- !is_square_attacked(gs, 5, 0))
- return 1;
-
- /* Queen side castling */
- if (fr == 0 && tr == 0 && ff == 4 && tf == 2 &&
- !gs->wkmoved &&
- !gs->wqrmoved &&
- gs->board[3][0] == NOPIECE &&
- gs->board[2][0] == NOPIECE &&
- gs->board[1][0] == NOPIECE &&
- gs->board[0][0] == W_ROOK &&
- !is_square_attacked(gs, 4, 0) &&
- !is_square_attacked(gs, 3, 0))
- return 1;
- } else { /* Black */
- /* King side castling */
- if (fr == 7 && tr == 7 && ff == 4 && tf == 6 &&
- !gs->bkmoved &&
- !gs->bkrmoved &&
- gs->board[5][7] == NOPIECE &&
- gs->board[6][7] == NOPIECE &&
- gs->board[7][7] == B_ROOK &&
- !is_square_attacked(gs, 4, 7) &&
- !is_square_attacked(gs, 5, 7))
- return 1;
-
- /* Queen side castling */
- if (fr == 7 && tr == 7 && ff == 4 && tf == 2 &&
- !gs->bkmoved &&
- !gs->bqrmoved &&
- gs->board[3][7] == NOPIECE &&
- gs->board[2][7] == NOPIECE &&
- gs->board[1][7] == NOPIECE &&
- gs->board[0][7] == B_ROOK &&
- !is_square_attacked(gs, 4, 7) &&
- !is_square_attacked(gs, 3, 7))
- return 1;
- }
-
- if ((ff - tf) > 1 ||
- (tf - ff) > 1)
- return 0;
- if ((fr - tr) > 1 ||
- (tr - fr) > 1)
- return 0;
-
- return 1;
+ int f, r;
+ gs->onMove = CToggle(gs->onMove);
+
+ for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
+ NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
+ if (legal_move(gs, f, r, kf, kr)) {
+ gs->onMove = CToggle(gs->onMove);
+ return 1;
+ }
+ }
+ gs->onMove = CToggle(gs->onMove);
+ return 0;
}
+*/
-PRIVATE void
-add_pos(int tof, int tor, int *posf, int *posr, int *numpos)
+PRIVATE int legal_king_move(game_state_t * gs, int ff, int fr, int tf, int tr)
{
- posf[*numpos] = tof;
- posr[*numpos] = tor;
- (*numpos)++;
+ if (gs->onMove == WHITE) {
+ /* King side castling */
+ if ((fr == 0) && (tr == 0) && (ff == 4) && (tf == 6) && !gs->wkmoved
+ && (!gs->wkrmoved) && (gs->board[5][0] == NOPIECE) &&
+ (gs->board[6][0] == NOPIECE) && (gs->board[7][0] == W_ROOK) &&
+ (!is_square_attacked(gs, 4, 0)) && (!is_square_attacked(gs, 5, 0))) {
+ return 1;
+ }
+ /* Queen side castling */
+ if ((fr == 0) && (tr == 0) && (ff == 4) && (tf == 2) && !gs->wkmoved
+ && (!gs->wqrmoved) && (gs->board[3][0] == NOPIECE) &&
+ (gs->board[2][0] == NOPIECE) && (gs->board[1][0] == NOPIECE) &&
+ (gs->board[0][0] == W_ROOK) &&
+ (!is_square_attacked(gs, 4, 0)) && (!is_square_attacked(gs, 3, 0))) {
+ return 1;
+ }
+ } else { /* Black */
+ /* King side castling */
+ if ((fr == 7) && (tr == 7) && (ff == 4) && (tf == 6) && !gs->bkmoved
+ && (!gs->bkrmoved) && (gs->board[5][7] == NOPIECE) &&
+ (gs->board[6][7] == NOPIECE) && (gs->board[7][7] == B_ROOK) &&
+ (!is_square_attacked(gs, 4, 7)) && (!is_square_attacked(gs, 5, 7))) {
+ return 1;
+ }
+ /* Queen side castling */
+ if ((fr == 7) && (tr == 7) && (ff == 4) && (tf == 2) && (!gs->bkmoved)
+ && (!gs->bqrmoved) && (gs->board[3][7] == NOPIECE) &&
+ (gs->board[2][7] == NOPIECE) && (gs->board[1][7] == NOPIECE) &&
+ (gs->board[0][7] == B_ROOK) &&
+ (!is_square_attacked(gs, 4, 7)) && (!is_square_attacked(gs, 3, 7))) {
+ return 1;
+ }
+ }
+ if (((ff - tf) > 1) || ((tf - ff) > 1))
+ return 0;
+ if (((fr - tr) > 1) || ((tr - fr) > 1))
+ return 0;
+ return 1;
}
-PRIVATE void
-possible_pawn_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void add_pos(int tof, int tor, int *posf, int *posr, int *numpos)
{
- if (gs->onMove == WHITE) {
- if (gs->board[onf][onr + 1] == NOPIECE) {
- add_pos(onf, onr + 1, posf, posr, numpos);
-
- if (onr == 1 && gs->board[onf][onr + 2] == NOPIECE)
- add_pos(onf, onr + 2, posf, posr, numpos);
- }
-
- if (onf > 0 &&
- gs->board[onf - 1][onr + 1] != NOPIECE &&
- iscolor(gs->board[onf - 1][onr + 1], BLACK))
- add_pos(onf - 1, onr + 1, posf, posr, numpos);
- if (onf < 7 &&
- gs->board[onf + 1][onr + 1] != NOPIECE &&
- iscolor(gs->board[onf + 1][onr + 1], BLACK))
- add_pos(onf + 1, onr + 1, posf, posr, numpos);
-
- if (gs->ep_possible[0][onf] == -1)
- add_pos(onf - 1, onr + 1, posf, posr, numpos);
- if (gs->ep_possible[0][onf] == 1)
- add_pos(onf + 1, onr + 1, posf, posr, numpos);
- } else {
- if (gs->board[onf][onr - 1] == NOPIECE) {
- add_pos(onf, onr - 1, posf, posr, numpos);
-
- if (onr == 6 && gs->board[onf][onr - 2] == NOPIECE)
- add_pos(onf, onr - 2, posf, posr, numpos);
- }
-
- if (onf > 0 &&
- gs->board[onf - 1][onr - 1] != NOPIECE &&
- iscolor(gs->board[onf - 1][onr - 1], WHITE))
- add_pos(onf - 1, onr - 1, posf, posr, numpos);
- if (onf < 7 &&
- gs->board[onf + 1][onr - 1] != NOPIECE &&
- iscolor(gs->board[onf + 1][onr - 1], WHITE))
- add_pos(onf + 1, onr - 1, posf, posr, numpos);
-
- if (gs->ep_possible[1][onf] == -1)
- add_pos(onf - 1, onr - 1, posf, posr, numpos);
- if (gs->ep_possible[1][onf] == 1)
- add_pos(onf + 1, onr - 1, posf, posr, numpos);
- }
+ posf[*numpos] = tof;
+ posr[*numpos] = tor;
+ (*numpos)++;
}
-PRIVATE void
-possible_knight_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void possible_pawn_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
{
- int f, r;
- int j;
- static int knightJumps[8][2] = {
- {-1, 2}, {1, 2}, {2, -1}, {2, 1}, {-1, -2}, {1, -2}, {-2, 1},
- {-2, -1}
- };
-
- for (j = 0; j < 8; j++) {
- f = knightJumps[j][0] + onf;
- r = knightJumps[j][1] + onr;
-
- if (f < 0 || f > 7)
- continue;
- if (r < 0 || r > 7)
- continue;
-
- if (gs->board[f][r] == NOPIECE || iscolor(gs->board[f][r],
- CToggle(gs->onMove)))
- add_pos(f, r, posf, posr, numpos);
- }
+ if (gs->onMove == WHITE) {
+ if (gs->board[onf][onr + 1] == NOPIECE) {
+ add_pos(onf, onr + 1, posf, posr, numpos);
+ if ((onr == 1) && (gs->board[onf][onr + 2] == NOPIECE))
+ add_pos(onf, onr + 2, posf, posr, numpos);
+ }
+ if ((onf > 0) && (gs->board[onf - 1][onr + 1] != NOPIECE) &&
+ (iscolor(gs->board[onf - 1][onr + 1], BLACK)))
+ add_pos(onf - 1, onr + 1, posf, posr, numpos);
+ if ((onf < 7) && (gs->board[onf + 1][onr + 1] != NOPIECE) &&
+ (iscolor(gs->board[onf + 1][onr + 1], BLACK)))
+ add_pos(onf + 1, onr + 1, posf, posr, numpos);
+ if (gs->ep_possible[0][onf] == -1)
+ add_pos(onf - 1, onr + 1, posf, posr, numpos);
+ if (gs->ep_possible[0][onf] == 1)
+ add_pos(onf + 1, onr + 1, posf, posr, numpos);
+ } else {
+ if (gs->board[onf][onr - 1] == NOPIECE) {
+ add_pos(onf, onr - 1, posf, posr, numpos);
+ if ((onr == 6) && (gs->board[onf][onr - 2] == NOPIECE))
+ add_pos(onf, onr - 2, posf, posr, numpos);
+ }
+ if ((onf > 0) && (gs->board[onf - 1][onr - 1] != NOPIECE) &&
+ (iscolor(gs->board[onf - 1][onr - 1], WHITE)))
+ add_pos(onf - 1, onr - 1, posf, posr, numpos);
+/* loon: changed what looks like a typo, here's the original line:
+ add_pos(onf - 1, onr + 1, posf, posr, numpos);
+*/
+ if ((onf < 7) && (gs->board[onf + 1][onr - 1] != NOPIECE) &&
+ (iscolor(gs->board[onf + 1][onr - 1], WHITE)))
+ add_pos(onf + 1, onr - 1, posf, posr, numpos);
+ if (gs->ep_possible[1][onf] == -1)
+ add_pos(onf - 1, onr - 1, posf, posr, numpos);
+ if (gs->ep_possible[1][onf] == 1)
+ add_pos(onf + 1, onr - 1, posf, posr, numpos);
+ }
}
-PRIVATE void
-possible_bishop_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void possible_knight_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
{
- int f, r;
-
- /* Up Left */
- f = onf;
- r = onr;
- while (1) {
- f--;
- r++;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Up Right */
- f = onf;
- r = onr;
- while (1) {
- f++;
- r++;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Down Left */
- f = onf;
- r = onr;
- while (1) {
- f--;
- r--;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Down Right */
- f = onf;
- r = onr;
- while (1) {
- f++;
- r--;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
+ static int knightJumps[8][2] = {{-1, 2}, {1, 2}, {2, -1}, {2, 1},
+ {-1, -2}, {1, -2}, {-2, 1}, {-2, -1}};
+ int f, r;
+ int j;
+
+ for (j = 0; j < 8; j++) {
+ f = knightJumps[j][0] + onf;
+ r = knightJumps[j][1] + onr;
+ if ((f < 0) || (f > 7))
+ continue;
+ if ((r < 0) || (r > 7))
+ continue;
+ if ((gs->board[f][r] == NOPIECE) ||
+ (iscolor(gs->board[f][r], CToggle(gs->onMove))))
+ add_pos(f, r, posf, posr, numpos);
+ }
}
-PRIVATE void
-possible_rook_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void possible_bishop_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
{
- int f, r;
-
- /* Left */
- f = onf;
- r = onr;
- while (1) {
- f--;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Right */
- f = onf;
- r = onr;
- while (1) {
- f++;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Up */
- f = onf;
- r = onr;
- while (1) {
- r++;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
-
- if (gs->board[f][r] != NOPIECE)
- break;
- }
-
- /* Down */
- f = onf;
- r = onr;
- while (1) {
- r--;
-
- if (f < 0 || f > 7)
- break;
- if (r < 0 || r > 7)
- break;
- if (gs->board[f][r] != NOPIECE && iscolor(gs->board[f][r],
- gs->onMove))
- break;
-
- add_pos(f, r, posf, posr, numpos);
+ int f, r;
+
+ /* Up Left */
+ f = onf;
+ r = onr;
+ while (1) {
+ f--;
+ r++;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Up Right */
+ f = onf;
+ r = onr;
+ while (1) {
+ f++;
+ r++;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Down Left */
+ f = onf;
+ r = onr;
+ while (1) {
+ f--;
+ r--;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Down Right */
+ f = onf;
+ r = onr;
+ while (1) {
+ f++;
+ r--;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+}
- if (gs->board[f][r] != NOPIECE)
- break;
- }
+PRIVATE void possible_rook_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
+{
+ int f, r;
+
+ /* Left */
+ f = onf;
+ r = onr;
+ while (1) {
+ f--;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Right */
+ f = onf;
+ r = onr;
+ while (1) {
+ f++;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Up */
+ f = onf;
+ r = onr;
+ while (1) {
+ r++;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
+ /* Down */
+ f = onf;
+ r = onr;
+ while (1) {
+ r--;
+ if ((f < 0) || (f > 7))
+ break;
+ if ((r < 0) || (r > 7))
+ break;
+ if ((gs->board[f][r] != NOPIECE) && (iscolor(gs->board[f][r], gs->onMove)))
+ break;
+ add_pos(f, r, posf, posr, numpos);
+ if (gs->board[f][r] != NOPIECE)
+ break;
+ }
}
-PRIVATE void
-possible_queen_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void possible_queen_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
{
- possible_rook_moves(gs, onf, onr, posf, posr, numpos);
- possible_bishop_moves(gs, onf, onr, posf, posr, numpos);
+ possible_rook_moves(gs, onf, onr, posf, posr, numpos);
+ possible_bishop_moves(gs, onf, onr, posf, posr, numpos);
}
-PRIVATE void
-possible_king_moves(game_state_t *gs, int onf, int onr, int *posf, int *posr,
- int *numpos)
+PRIVATE void possible_king_moves(game_state_t * gs,
+ int onf, int onr,
+ int *posf, int *posr, int *numpos)
{
- int f, r;
- int j;
- static int kingJumps[8][2] = {
- {-1, -1}, {0, -1}, {1, -1}, {-1, 1}, {0, 1}, {1, 1}, {-1, 0},
- {1, 0}
- };
-
- for (j = 0; j < 8; j++) {
- f = kingJumps[j][0] + onf;
- r = kingJumps[j][1] + onr;
-
- if (f < 0 || f > 7)
- continue;
- if (r < 0 || r > 7)
- continue;
-
- if (gs->board[f][r] == NOPIECE || iscolor(gs->board[f][r],
- CToggle(gs->onMove)))
- add_pos(f, r, posf, posr, numpos);
- }
+ static int kingJumps[8][2] = {{-1, -1}, {0, -1}, {1, -1}, {-1, 1},
+ {0, 1}, {1, 1}, {-1, 0}, {1, 0}};
+ int f, r;
+ int j;
+
+ for (j = 0; j < 8; j++) {
+ f = kingJumps[j][0] + onf;
+ r = kingJumps[j][1] + onr;
+ if ((f < 0) || (f > 7))
+ continue;
+ if ((r < 0) || (r > 7))
+ continue;
+ if ((gs->board[f][r] == NOPIECE) ||
+ (iscolor(gs->board[f][r], CToggle(gs->onMove))))
+ add_pos(f, r, posf, posr, numpos);
+ }
}
/* Doesn't check for check */
-PUBLIC int
-legal_move(game_state_t *gs,
- int fFile, int fRank,
- int tFile, int tRank)
+PUBLIC int legal_move(game_state_t * gs,
+ int fFile, int fRank,
+ int tFile, int tRank)
{
- int legal;
- int move_piece;
-
- if (fFile == ALG_DROP) {
- if ((move_piece = fRank) == KING)
- return 0;
- if (gs->holding[gs->onMove == WHITE ? 0 : 1][move_piece - 1]
- == 0)
- return 0;
- if (gs->board[tFile][tRank] != NOPIECE)
- return 0;
- if (move_piece == PAWN && (tRank == 0 || tRank == 7))
- return 0;
- return 1;
- } else {
- move_piece = piecetype(gs->board[fFile][fRank]);
- }
-
- if (gs->board[fFile][fRank] == NOPIECE)
- return 0;
- if (!iscolor(gs->board[fFile][fRank], gs->onMove)) // Wrong color
- return 0;
- if (gs->board[tFile][tRank] != NOPIECE &&
- iscolor(gs->board[tFile][tRank], gs->onMove)) // Can't capture own
- return 0;
- if (fFile == tFile && fRank == tRank) // Same square
- return 0;
-
- switch (move_piece) {
- case PAWN:
- legal = legal_pawn_move(gs, fFile, fRank, tFile, tRank);
- break;
- case KNIGHT:
- legal = legal_knight_move(gs, fFile, fRank, tFile, tRank);
- break;
- case BISHOP:
- legal = legal_bishop_move(gs, fFile, fRank, tFile, tRank);
- break;
- case ROOK:
- legal = legal_rook_move(gs, fFile, fRank, tFile, tRank);
- break;
- case QUEEN:
- legal = legal_queen_move(gs, fFile, fRank, tFile, tRank);
- break;
- case KING:
- legal = legal_king_move(gs, fFile, fRank, tFile, tRank);
- break;
- default:
- return 0;
- }
-
- return legal;
+ int move_piece;
+ int legal;
+
+ if (fFile == ALG_DROP) {
+ move_piece = fRank;
+ if (move_piece == KING)
+ return 0;
+ if (gs->holding[gs->onMove==WHITE ? 0 : 1][move_piece-1] == 0)
+ return 0;
+ if (gs->board[tFile][tRank] != NOPIECE)
+ return 0;
+ if (move_piece == PAWN && (tRank == 0 || tRank == 7))
+ return 0;
+ return 1;
+ } else {
+ move_piece = piecetype(gs->board[fFile][fRank]);
+ }
+ if (gs->board[fFile][fRank] == NOPIECE)
+ return 0;
+ if (!iscolor(gs->board[fFile][fRank], gs->onMove)) /* Wrong color */
+ return 0;
+ if ((gs->board[tFile][tRank] != NOPIECE) &&
+ iscolor(gs->board[tFile][tRank], gs->onMove)) /* Can't capture own */
+ return 0;
+ if ((fFile == tFile) && (fRank == tRank)) /* Same square */
+ return 0;
+ switch (move_piece) {
+ case PAWN:
+ legal = legal_pawn_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ case KNIGHT:
+ legal = legal_knight_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ case BISHOP:
+ legal = legal_bishop_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ case ROOK:
+ legal = legal_rook_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ case QUEEN:
+ legal = legal_queen_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ case KING:
+ legal = legal_king_move(gs, fFile, fRank, tFile, tRank);
+ break;
+ default:
+ return 0;
+ break;
+ }
+ return legal;
}
+
/*
* This fills in the rest of the mt structure once it is determined
* that. (Returns 'MOVE_ILLEGAL' if move leaves you in check.)
@@ -827,11 +698,11 @@ move_calculate(game_state_t *gs, move_t *mt, int promote)
if (piecetype(gs->board[mt->fromFile][mt->fromRank]) == KING &&
mt->fromFile == 4 &&
mt->toFile == 2) {
- strlcpy(mt->moveString, "o-o-o", sizeof mt->moveString);
+ sprintf(mt->moveString, "o-o-o");
} else if (piecetype(gs->board[mt->fromFile][mt->fromRank]) == KING &&
mt->fromFile == 4 &&
mt->toFile == 6) {
- strlcpy(mt->moveString, "o-o", sizeof mt->moveString);
+ sprintf(mt->moveString, "o-o");
} else {
ret = snprintf(mt->moveString, sizeof mt->moveString,
"%s/%c%d-%c%d",
@@ -864,65 +735,57 @@ move_calculate(game_state_t *gs, move_t *mt, int promote)
return MOVE_OK;
}
-PUBLIC int
-legal_andcheck_move(game_state_t *gs, int fFile, int fRank,
- int tFile, int tRank)
+PUBLIC int legal_andcheck_move(game_state_t * gs,
+ int fFile, int fRank,
+ int tFile, int tRank)
{
- move_t mt;
-
- if (!legal_move(gs, fFile, fRank, tFile, tRank))
- return 0;
-
- mt.color = gs->onMove;
- mt.fromFile = fFile;
- mt.fromRank = fRank;
- mt.toFile = tFile;
- mt.toRank = tRank;
-
- if (move_calculate(gs, &mt, QUEEN) == MOVE_OK)
- return 1;
- return 0;
+ move_t mt;
+ if (!legal_move(gs, fFile, fRank, tFile, tRank))
+ return 0;
+ mt.color = gs->onMove;
+ mt.fromFile = fFile;
+ mt.fromRank = fRank;
+ mt.toFile = tFile;
+ mt.toRank = tRank;
+ /* This should take into account a pawn promoting to another piece */
+ if (move_calculate(gs, &mt, QUEEN) == MOVE_OK)
+ return 1;
+ else
+ return 0;
}
-PUBLIC int
-in_check(game_state_t *gs)
+PUBLIC int in_check(game_state_t * gs)
{
- int f, r;
- int kf = -1, kr = -1;
-
- /* Find the king */
- if (gs->onMove == WHITE) {
- for (f = 0; f < 8 && kf < 0; f++) {
- for (r = 0; r < 8 && kf < 0; r++) {
- if (gs->board[f][r] == B_KING) {
- kf = f;
- kr = r;
- }
- }
- }
- } else {
- for (f = 0; f < 8 && kf < 0; f++) {
- for (r = 0; r < 8 && kf < 0; r++) {
- if (gs->board[f][r] == W_KING) {
- kf = f;
- kr = r;
- }
- }
- }
+ int f, r;
+ int kf = -1, kr = -1;
+
+ /* Find the king */
+ if (gs->onMove == WHITE) {
+ for (f = 0; f < 8 && kf < 0; f++)
+ for (r = 0; r < 8 && kf < 0; r++)
+ if (gs->board[f][r] == B_KING) {
+ kf = f;
+ kr = r;
}
-
- if (kf < 0) {
- fprintf(stderr, "FICS: Error game with no king!\n");
- return 0;
+ } else {
+ for (f = 0; f < 8 && kf < 0; f++)
+ for (r = 0; r < 8 && kf < 0; r++)
+ if (gs->board[f][r] == W_KING) {
+ kf = f;
+ kr = r;
}
-
- for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
- NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
- if (legal_move(gs, f, r, kf, kr)) // In Check?
- return 1;
- }
-
- return 0;
+ }
+ if (kf < 0) {
+ fprintf(stderr, "FICS: Error game with no king!\n");
+ return 0;
+ }
+ for (InitPieceLoop(gs->board, &f, &r, gs->onMove);
+ NextPieceLoop(gs->board, &f, &r, gs->onMove);) {
+ if (legal_move(gs, f, r, kf, kr)) { /* In Check? */
+ return 1;
+ }
+ }
+ return 0;
}
PRIVATE int
@@ -1010,68 +873,64 @@ has_legal_move(game_state_t *gs)
return 0;
}
-PUBLIC int
-parse_move(char *mstr, game_state_t *gs, move_t *mt, int promote)
+/* This will end up being a very complicated function */
+PUBLIC int parse_move(char *mstr, game_state_t * gs, move_t * mt, int promote)
{
- int result;
- int type = is_move(mstr);
-
- mt->color = gs->onMove;
-
- switch (type) {
- case MS_NOTMOVE:
- return MOVE_ILLEGAL;
- case MS_COMP:
- mt->fromFile = mstr[0] - 'a';
- mt->fromRank = mstr[1] - '1';
- mt->toFile = mstr[2] - 'a';
- mt->toRank = mstr[3] - '1';
- break;
- case MS_COMPDASH:
- mt->fromFile = mstr[0] - 'a';
- mt->fromRank = mstr[1] - '1';
- mt->toFile = mstr[3] - 'a';
- mt->toRank = mstr[4] - '1';
- break;
- case MS_KCASTLE:
- mt->fromFile = 4;
- mt->toFile = 6;
-
- if (gs->onMove == WHITE) {
- mt->fromRank = 0;
- mt->toRank = 0;
- } else {
- mt->fromRank = 7;
- mt->toRank = 7;
- }
-
- break;
- case MS_QCASTLE:
- mt->fromFile = 4;
- mt->toFile = 2;
-
- if (gs->onMove == WHITE) {
- mt->fromRank = 0;
- mt->toRank = 0;
- } else {
- mt->fromRank = 7;
- mt->toRank = 7;
- }
-
- break;
- case MS_ALG:
- /* Fills in the mt structure */
- if ((result = alg_parse_move(mstr, gs, mt)) != MOVE_OK)
- return result;
- break;
- default:
- return MOVE_ILLEGAL;
- }
-
- if (!legal_move(gs, mt->fromFile, mt->fromRank, mt->toFile, mt->toRank))
- return MOVE_ILLEGAL;
-
- return move_calculate(gs, mt, promote);
+ int type = is_move(mstr);
+ int result;
+
+ mt->color = gs->onMove;
+ switch (type) {
+ case MS_NOTMOVE:
+ return MOVE_ILLEGAL;
+ break;
+ case MS_COMP:
+ mt->fromFile = mstr[0] - 'a';
+ mt->fromRank = mstr[1] - '1';
+ mt->toFile = mstr[2] - 'a';
+ mt->toRank = mstr[3] - '1';
+ break;
+ case MS_COMPDASH:
+ mt->fromFile = mstr[0] - 'a';
+ mt->fromRank = mstr[1] - '1';
+ mt->toFile = mstr[3] - 'a';
+ mt->toRank = mstr[4] - '1';
+ break;
+ case MS_KCASTLE:
+ mt->fromFile = 4;
+ mt->toFile = 6;
+ if (gs->onMove == WHITE) {
+ mt->fromRank = 0;
+ mt->toRank = 0;
+ } else {
+ mt->fromRank = 7;
+ mt->toRank = 7;
+ }
+ break;
+ case MS_QCASTLE:
+ mt->fromFile = 4;
+ mt->toFile = 2;
+ if (gs->onMove == WHITE) {
+ mt->fromRank = 0;
+ mt->toRank = 0;
+ } else {
+ mt->fromRank = 7;
+ mt->toRank = 7;
+ }
+ break;
+ case MS_ALG:
+ /* Fills in the mt structure */
+ if ((result = alg_parse_move(mstr, gs, mt)) != MOVE_OK)
+ return result;
+ break;
+ default:
+ return MOVE_ILLEGAL;
+ break;
+ }
+ if (!legal_move(gs, mt->fromFile, mt->fromRank, mt->toFile, mt->toRank)) {
+ return MOVE_ILLEGAL;
+ }
+ return move_calculate(gs, mt, promote);
}
/*
@@ -1266,369 +1125,260 @@ execute_move(game_state_t *gs, move_t *mt, int check_game_status)
return MOVE_OK;
}
-PRIVATE void
-piecetype_rook(int g, int mode, game_state_t *gs, move_t *m, move_t **m1)
+PUBLIC int backup_move(int g, int mode)
{
- int i;
-
- if (m->color == WHITE) {
- if (m->fromFile == 0 && m->fromRank == 0) {
- for (i = 2; i < garray[g].numHalfMoves - 1; i += 2) {
- *m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if ((*m1)->fromFile == 0 &&
- (*m1)->fromRank == 0)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->wqrmoved = 0;
- }
-
- if (m->fromFile == 7 && m->fromRank == 0) {
- for (i = 2; i < garray[g].numHalfMoves - 1; i += 2) {
- *m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if ((*m1)->fromFile == 7 &&
- (*m1)->fromRank == 0)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->wkrmoved = 0;
- }
- } else {
- if (m->fromFile == 0 && m->fromRank == 7) {
- for (i = 3; i < garray[g].numHalfMoves - 1; i += 2) {
- *m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if ((*m1)->fromFile == 0 &&
- (*m1)->fromRank == 0)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->bqrmoved = 0;
- }
-
- if (m->fromFile == 7 && m->fromRank == 7) {
- for (i = 3; i < garray[g].numHalfMoves - 1; i += 2) {
- *m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if ((*m1)->fromFile == 7 &&
- (*m1)->fromRank == 0)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->bkrmoved = 0;
- }
+ game_state_t *gs;
+ move_t *m, *m1;
+ int now, i;
+
+ if (garray[g].link >= 0) /*IanO: not implemented for bughouse yet */
+ return MOVE_ILLEGAL;
+ if (garray[g].numHalfMoves < 1)
+ return MOVE_ILLEGAL;
+ gs = &garray[g].game_state;
+ m = (mode==REL_GAME) ? &garray[g].moveList[garray[g].numHalfMoves - 1] :
+ &garray[g].examMoveList[garray[g].numHalfMoves - 1];
+ if (m->toFile < 0) {
+ return MOVE_ILLEGAL;
+ }
+ gs->board[m->fromFile][m->fromRank] = gs->board[m->toFile][m->toRank];
+ if (m->piecePromotionTo != NOPIECE) {
+ gs->board[m->fromFile][m->fromRank] = PAWN |
+ colorval(gs->board[m->fromFile][m->fromRank]);
+ }
+ /******************
+ When takeback a _first_ move of rook, the ??rmoved variable
+ must be cleared . To check, if the move is first, we should
+ scan moveList.
+ *******************/
+ if (piecetype(gs->board[m->fromFile][m->fromRank]) == ROOK) {
+ if (m->color == WHITE) {
+ if ((m->fromFile == 0) && (m->fromRank == 0)) {
+ for (i = 2; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 0) && (m1->fromRank == 0))
+ break;
}
-}
-
-#ifdef TIMESEAL
-PRIVATE void
-backup_move_timeseal_block(int g, move_t *m)
-{
- if (m->color == WHITE) {
- if (con[parray[garray[g].white].socket].timeseal) {
- garray[g].wRealTime += (m->tookTime * 100);
- garray[g].wRealTime -= (garray[g].wIncrement * 100);
- garray[g].wTime = (garray[g].wRealTime / 100);
-
- if (con[parray[garray[g].black].socket].timeseal) {
- garray[g].bTime = (garray[g].bRealTime / 100);
- } else { // Opp has no timeseal
- garray[g].bTime += (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- }
- } else { // White has no timeseal
- garray[g].wTime += m->tookTime;
- garray[g].wTime -= garray[g].wIncrement;
-
- if (con[parray[garray[g].black].socket].timeseal) {
- garray[g].bTime = (garray[g].bRealTime / 100);
- } else { // Opp has no timeseal
- garray[g].bTime += (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- }
- }
- } else {
- if (con[parray[garray[g].black].socket].timeseal) {
- garray[g].bRealTime += (m->tookTime * 100);
- garray[g].bRealTime -= (garray[g].wIncrement * 100);
- garray[g].bTime = (garray[g].bRealTime / 100);
-
- if (con[parray[garray[g].white].socket].timeseal) {
- garray[g].wTime = (garray[g].wRealTime / 100);
- } else { // Opp has no timeseal
- garray[g].wTime += (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- }
- } else { // Black has no timeseal
- garray[g].bTime += m->tookTime;
-
- if (!garray[g].bIncrement)
- garray[g].bTime -= garray[g].wIncrement;
- else
- garray[g].bTime -= garray[g].bIncrement;
-
- if (con[parray[garray[g].white].socket].timeseal) {
- garray[g].wTime = (garray[g].wRealTime / 100);
- } else { // Opp has no timeseal
- garray[g].wTime += (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- }
- }
+ if (i == garray[g].numHalfMoves - 1)
+ gs->wqrmoved = 0;
+ }
+ if ((m->fromFile == 7) && (m->fromRank == 0)) {
+ for (i = 2; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 7) && (m1->fromRank == 0))
+ break;
}
-}
-#endif // TIMESEAL
-
-PRIVATE void
-update_enpassant_array(int g, int mode, game_state_t *gs)
-{
- move_t *m1;
-
- if (!(garray[g].numHalfMoves > 0))
- return;
-
- m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[garray[g].numHalfMoves - 1]
- : &garray[g].examMoveList[garray[g].numHalfMoves - 1]);
-
- if (piecetype(gs->board[m1->toFile][m1->toRank]) == PAWN) {
- if ((m1->toRank - m1->fromRank) == 2) {
- if (m1->toFile < 7 &&
- gs->board[m1->toFile + 1][3] == B_PAWN)
- gs->ep_possible[1][m1->toFile + 1] = -1;
- if (m1->toFile - 1 >= 0 &&
- gs->board[m1->toFile - 1][3] == B_PAWN)
- gs->ep_possible[1][m1->toFile - 1] = 1;
- }
-
- if ((m1->toRank - m1->fromRank) == -2) {
- if (m1->toFile < 7 &&
- gs->board[m1->toFile + 1][4] == W_PAWN)
- gs->ep_possible[0][m1->toFile + 1] = -1;
- if (m1->toFile - 1 >= 0 &&
- gs->board[m1->toFile - 1][4] == W_PAWN)
- gs->ep_possible[0][m1->toFile - 1] = 1;
- }
+ if (i == garray[g].numHalfMoves - 1)
+ gs->wkrmoved = 0;
+ }
+ } else {
+ if ((m->fromFile == 0) && (m->fromRank == 7)) {
+ for (i = 3; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 0) && (m1->fromRank == 0))
+ break;
}
-}
-
-PRIVATE void
-clean_up_doit(int g, int mode, game_state_t *gs, move_t *m)
-{
- unsigned int now;
-
- if (garray[g].status != GAME_EXAMINE)
- game_update_time(g);
-
- garray[g].numHalfMoves--;
+ if (i == garray[g].numHalfMoves - 1)
+ gs->bqrmoved = 0;
+ }
+ if ((m->fromFile == 7) && (m->fromRank == 7)) {
+ for (i = 3; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 7) && (m1->fromRank == 0))
+ break;
+ }
+ if (i == garray[g].numHalfMoves - 1)
+ gs->bkrmoved = 0;
+ }
+ }
+ }
+ if (piecetype(gs->board[m->fromFile][m->fromRank]) == KING) {
+ gs->board[m->toFile][m->toRank] = m->pieceCaptured;
+
+ if (m->toFile - m->fromFile == 2) {
+ gs->board[7][m->fromRank] = ROOK |
+ colorval(gs->board[m->fromFile][m->fromRank]);
+ gs->board[5][m->fromRank] = NOPIECE;
+
+ /********
+ If takeback a castling, the appropriates ??moved variables
+ must be cleared
+ ********/
+ if (m->color == WHITE) {
+ gs->wkmoved = 0;
+ gs->wkrmoved = 0;
+ } else {
+ gs->bkmoved = 0;
+ gs->bkrmoved = 0;
+ }
+ goto cleanupMove;
+ }
+ if (m->fromFile - m->toFile == 2) {
+ gs->board[0][m->fromRank] = ROOK |
+ colorval(gs->board[m->fromFile][m->fromRank]);
+ gs->board[3][m->fromRank] = NOPIECE;
+
+ /**********
+ If takeback a castling, the appropriate ??moved variables
+ must be cleared
+ ***********/
+ if (m->color == WHITE) {
+ gs->wkmoved = 0;
+ gs->wqrmoved = 0;
+ } else {
+ gs->bkmoved = 0;
+ gs->bqrmoved = 0;
+ }
+ goto cleanupMove;
+ }
+ /******************
+ When takeback a _first_ move of king (not the castling),
+ the ?kmoved variable must be cleared . To check, if the move is first,
+ we should scan moveList.
+ *******************/
+
+ if (m->color == WHITE) {
+
+ if ((m->fromFile == 4) && (m->fromRank == 0)) {
+ for (i = 2; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 4) && (m1->fromRank == 0))
+ break;
+ }
+ if (i == garray[g].numHalfMoves - 1)
+ gs->wkmoved = 0;
+ }
+ } else {
+ if ((m->fromFile == 4) && (m->fromRank == 7)) {
+ for (i = 3; i < garray[g].numHalfMoves - 1; i += 2) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[i] : &garray[g].examMoveList[i];
+ if ((m1->fromFile == 4) && (m1->fromRank == 7))
+ break;
+ }
+ if (i == garray[g].numHalfMoves - 1)
+ gs->bkmoved = 0;
+ }
+ }
+ }
+ if (m->enPassant) { /* Do enPassant */
+ gs->board[m->toFile][m->fromRank] = PAWN |
+ (colorval(gs->board[m->fromFile][m->fromRank]) == WHITE ? BLACK : WHITE);
+ gs->board[m->toFile][m->toRank] = NOPIECE;
+ /* Should set the enpassant array, but I don't care right now */
+ goto cleanupMove;
+ }
+ gs->board[m->toFile][m->toRank] = m->pieceCaptured;
+cleanupMove:
+ if (garray[g].status != GAME_EXAMINE) {
+ game_update_time(g);
+ }
+ garray[g].numHalfMoves--;
+ if (garray[g].status != GAME_EXAMINE) {
+ if (garray[g].wInitTime) { /* Don't update times in untimed games */
+ now = tenth_secs();
- if (garray[g].status != GAME_EXAMINE) {
- if (garray[g].wInitTime) { // Don't update times in untimed
- // games.
- now = tenth_secs();
#ifdef TIMESEAL
- backup_move_timeseal_block(g, m);
-#else
- if (m->color == WHITE) {
- garray[g].wTime += m->tookTime;
- garray[g].wTime = (garray[g].wTime -
- garray[g].wIncrement);
- garray[g].bTime +=
- (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- } else {
- garray[g].bTime += m->tookTime;
-
- if (!garray[g].bIncrement) {
- garray[g].bTime =
- (garray[g].bTime -
- garray[g].wIncrement);
- } else {
- garray[g].bTime =
- (garray[g].bTime -
- garray[g].bIncrement);
- }
- garray[g].wTime += (garray[g].lastDecTime -
- garray[g].lastMoveTime);
- }
-#endif
-
- if (garray[g].numHalfMoves == 0)
- garray[g].timeOfStart = now;
- garray[g].lastMoveTime = now;
- garray[g].lastDecTime = now;
- }
+ if (m->color == WHITE) {
+ if (con[parray[garray[g].white].socket].timeseal) { /* white uses timeseal? */
+ garray[g].wRealTime += (m->tookTime * 100);
+ garray[g].wRealTime -= (garray[g].wIncrement * 100);
+ garray[g].wTime = garray[g].wRealTime / 100;
+ if (con[parray[garray[g].black].socket].timeseal) { /* opp uses timeseal? */
+ garray[g].bTime = garray[g].bRealTime / 100;
+ } else { /* opp has no timeseal */
+ garray[g].bTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ }
+ } else { /* white has no timeseal */
+ garray[g].wTime += m->tookTime;
+ garray[g].wTime -= garray[g].wIncrement;
+ if (con[parray[garray[g].black].socket].timeseal) { /* opp uses timeseal? */
+ garray[g].bTime = garray[g].bRealTime / 100;
+ } else { /* opp has no timeseal */
+ garray[g].bTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ }
}
-
- if (gs->onMove == BLACK) {
- gs->onMove = WHITE;
- } else {
- gs->onMove = BLACK;
- gs->moveNum--;
+ } else {
+ if (con[parray[garray[g].black].socket].timeseal) { /* black uses timeseal? */
+ garray[g].bRealTime += (m->tookTime * 100);
+ garray[g].bRealTime -= (garray[g].wIncrement * 100);
+ garray[g].bTime = garray[g].bRealTime / 100;
+ if (con[parray[garray[g].white].socket].timeseal) { /* opp uses timeseal? */
+ garray[g].wTime = garray[g].wRealTime / 100;
+ } else { /* opp has no timeseal */
+ garray[g].wTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ }
+ } else { /* black has no timeseal */
+ garray[g].bTime += m->tookTime;
+ if (!garray[g].bIncrement)
+ garray[g].bTime -= garray[g].wIncrement;
+ else
+ garray[g].bTime -= garray[g].bIncrement;
+ if (con[parray[garray[g].white].socket].timeseal) { /* opp uses timeseal? */
+ garray[g].wTime = garray[g].wRealTime / 100;
+ } else { /* opp has no timeseal */
+ garray[g].wTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ }
}
+ }
- /*
- * takeback of last move is done already. It's time to update
- * enpassant array...
- */
- update_enpassant_array(g, mode, gs);
-}
-
-PUBLIC int
-backup_move(int g, int mode)
-{
- game_state_t *gs;
- int i;
- move_t *m, *m1;
-
- if (garray[g].link >= 0) // Not implemented for bughouse yet.
- return MOVE_ILLEGAL;
- if (garray[g].numHalfMoves < 1)
- return MOVE_ILLEGAL;
-
- gs = &garray[g].game_state;
- m = ((mode == REL_GAME)
- ? &garray[g].moveList[garray[g].numHalfMoves - 1]
- : &garray[g].examMoveList[garray[g].numHalfMoves - 1]);
+#else
- if (m->toFile < 0)
- return MOVE_ILLEGAL;
+ if (m->color == WHITE) {
+ garray[g].wTime += m->tookTime;
+ garray[g].wTime = garray[g].wTime - garray[g].wIncrement;
+ garray[g].bTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ } else {
+ garray[g].bTime += m->tookTime;
+ if (!garray[g].bIncrement)
+ garray[g].bTime = garray[g].bTime - garray[g].wIncrement;
+ else
+ garray[g].bTime = garray[g].bTime - garray[g].bIncrement;
+ garray[g].wTime += (garray[g].lastDecTime - garray[g].lastMoveTime);
+ }
- gs->board[m->fromFile][m->fromRank] = gs->board[m->toFile][m->toRank];
+#endif
- if (m->piecePromotionTo != NOPIECE) {
- gs->board[m->fromFile][m->fromRank] = (PAWN |
- colorval(gs->board[m->fromFile][m->fromRank]));
+ if (garray[g].numHalfMoves == 0)
+ garray[g].timeOfStart = now;
+ garray[g].lastMoveTime = now;
+ garray[g].lastDecTime = now;
+ }
+ }
+ if (gs->onMove == BLACK)
+ gs->onMove = WHITE;
+ else {
+ gs->onMove = BLACK;
+ gs->moveNum--;
+ }
+
+ /******* Here begins the patch : ********************************
+ Takeback of last move is done already, it's time to update enpassant
+ array. (patch from Soso, added by Sparky 3/17/95)
+ ********/
+
+ if (garray[g].numHalfMoves > 0) {
+ m1 = (mode==REL_GAME) ? &garray[g].moveList[garray[g].numHalfMoves - 1] :
+ &garray[g].examMoveList[garray[g].numHalfMoves - 1];
+ if (piecetype(gs->board[m1->toFile][m1->toRank]) == PAWN) {
+ if ((m1->toRank - m1->fromRank) == 2) {
+ if ((m1->toFile < 7) && gs->board[m1->toFile + 1][3] == B_PAWN) {
+ gs->ep_possible[1][m1->toFile + 1] = -1;
}
-
- /*
- * When takeback a _first_ move of rook, the ??rmoved
- * variable must be cleared. To check if the move is first we
- * should the scan move list.
- */
- if (piecetype(gs->board[m->fromFile][m->fromRank]) == ROOK)
- piecetype_rook(g, mode, gs, m, &m1);
-
- if (piecetype(gs->board[m->fromFile][m->fromRank]) == KING) {
- gs->board[m->toFile][m->toRank] = m->pieceCaptured;
-
- if (m->toFile - m->fromFile == 2) {
- gs->board[7][m->fromRank] = (ROOK |
- colorval(gs->board[m->fromFile][m->fromRank]));
- gs->board[5][m->fromRank] = NOPIECE;
-
- /*
- * If takeback a castling, the appropriates
- * ??moved variables must be cleared.
- */
- if (m->color == WHITE) {
- gs->wkmoved = 0;
- gs->wkrmoved = 0;
- } else {
- gs->bkmoved = 0;
- gs->bkrmoved = 0;
- }
-
- goto cleanupMove;
- }
-
- if (m->fromFile - m->toFile == 2) {
- gs->board[0][m->fromRank] = (ROOK |
- colorval(gs->board[m->fromFile][m->fromRank]));
- gs->board[3][m->fromRank] = NOPIECE;
-
- /*
- * If takeback a castling, the appropriate
- * ??moved variables must be cleared.
- */
- if (m->color == WHITE) {
- gs->wkmoved = 0;
- gs->wqrmoved = 0;
- } else {
- gs->bkmoved = 0;
- gs->bqrmoved = 0;
- }
-
- goto cleanupMove;
- }
-
- /*
- * When takeback a _first_ move of king (not the
- * castling), the ?kmoved variable must be cleared. To
- * check if the move is first we should scan the move
- * list.
- */
- if (m->color == WHITE) {
- if (m->fromFile == 4 && m->fromRank == 0) {
- for (i = 2;
- i < garray[g].numHalfMoves - 1;
- i += 2) {
- m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if (m1->fromFile == 4 &&
- m1->fromRank == 0)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->wkmoved = 0;
- }
- } else {
- if (m->fromFile == 4 && m->fromRank == 7) {
- for (i = 3;
- i < garray[g].numHalfMoves - 1;
- i += 2) {
- m1 = ((mode == REL_GAME)
- ? &garray[g].moveList[i]
- : &garray[g].examMoveList[i]);
-
- if (m1->fromFile == 4 &&
- m1->fromRank == 7)
- break;
- }
-
- if (i == (garray[g].numHalfMoves - 1))
- gs->bkmoved = 0;
- }
- }
+ if ((m1->toFile - 1 >= 0) && gs->board[m1->toFile - 1][3] == B_PAWN) {
+ gs->ep_possible[1][m1->toFile - 1] = 1;
}
-
- if (m->enPassant) {
- if (colorval(gs->board[m->fromFile][m->fromRank]) == WHITE)
- gs->board[m->toFile][m->fromRank] = (PAWN | BLACK);
- else
- gs->board[m->toFile][m->fromRank] = (PAWN | WHITE);
-
- gs->board[m->toFile][m->toRank] = NOPIECE;
-
- /*
- * Should set the enpassant array. But I don't care
- * right now.
- */
- goto cleanupMove;
+ }
+ if ((m1->toRank - m1->fromRank) == -2) {
+ if ((m1->toFile < 7) && gs->board[m1->toFile + 1][4] == W_PAWN) {
+ gs->ep_possible[0][m1->toFile + 1] = -1;
}
-
- gs->board[m->toFile][m->toRank] = m->pieceCaptured;
-
- cleanupMove:
-
- clean_up_doit(g, mode, gs, m);
-
- return MOVE_OK;
+ if ((m1->toFile - 1 >= 0) && gs->board[m1->toFile - 1][4] == W_PAWN) {
+ gs->ep_possible[0][m1->toFile - 1] = 1;
+ }
+ }
+ }
+ }
+ /************** and here's the end **************/
+ return MOVE_OK;
}
diff --git a/FICS/movecheck.h b/FICS/movecheck.h
index 9cd65c8..53a1712 100644
--- a/FICS/movecheck.h
+++ b/FICS/movecheck.h
@@ -19,26 +19,25 @@
/* Revision history:
name email yy/mm/dd Change
- Richard Nash 93/10/22 Created
- Markus Uhlin 24/03/17 Revised
+ Richard Nash 93/10/22 Created
*/
#ifndef _MOVECHECK_H
#define _MOVECHECK_H
-#define MOVE_OK 0
-#define MOVE_ILLEGAL 1
-#define MOVE_STALEMATE 2
-#define MOVE_CHECKMATE 3
-#define MOVE_AMBIGUOUS 4
-#define MOVE_NOMATERIAL 5
+#define MOVE_OK 0
+#define MOVE_ILLEGAL 1
+#define MOVE_STALEMATE 2
+#define MOVE_CHECKMATE 3
+#define MOVE_AMBIGUOUS 4
+#define MOVE_NOMATERIAL 5
-#define MS_NOTMOVE 0
-#define MS_COMP 1
-#define MS_COMPDASH 2
-#define MS_ALG 3
-#define MS_KCASTLE 4
-#define MS_QCASTLE 5
+#define MS_NOTMOVE 0
+#define MS_COMP 1
+#define MS_COMPDASH 2
+#define MS_ALG 3
+#define MS_KCASTLE 4
+#define MS_QCASTLE 5
#define isrank(c) (((c) <= '8') && ((c) >= '1'))
#define isfile(c) (((c) >= 'a') && ((c) <= 'h'))
@@ -47,15 +46,16 @@
#include "board.h"
#endif
-extern int InitPieceLoop(board_t, int *, int *, int);
-extern int NextPieceLoop(board_t, int *, int *, int);
-
-extern int backup_move(int, int);
-extern int execute_move(game_state_t *, move_t *, int);
-extern int in_check(game_state_t *);
-extern int is_move(char *);
-extern int legal_andcheck_move(game_state_t *, int, int, int, int);
-extern int legal_move(game_state_t *, int, int, int, int);
-extern int parse_move(char *, game_state_t *, move_t *, int);
+extern int is_move(char *);
+extern int parse_move(char *, game_state_t *, move_t *, int);
+extern int execute_move(game_state_t *, move_t *, int);
+extern int backup_move(int, int);
+
+/* Some useful chess utilities */
+extern int NextPieceLoop(board_t, int *, int *, int);
+extern int InitPieceLoop(board_t, int *, int *, int);
+extern int legal_move(game_state_t *, int, int, int, int);
+extern int legal_andcheck_move(game_state_t *, int, int, int, int);
+extern int in_check(game_state_t *);
#endif /* _MOVECHECK_H */
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