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interupt.c
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/
interupt.c
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#include <signal.h>
#include "chess.h"
#include "data.h"
/* last modified 01/17/09 */
/*
*******************************************************************************
* *
* Interrupt() is used to read in a move when the operator types something *
* while a search is in progress (during pondering as one example.) This *
* routine reads in a command (move) and then makes two attempts to use this *
* input: (1) call Option() to see if the command can be executed; (2) try *
* InputMove() to see if this input is a legal move; If so, and we are *
* pondering see if it matches the move we are pondering. *
* *
*******************************************************************************
*/
void Interrupt(int ply) {
int temp, i, left = 0, readstat, result, time_used;
int save_move_number;
TREE *const tree = block[0];
/*
************************************************************
* *
* If trying to find a move to ponder, and the operator *
* types a command, exit a.s.a.p. *
* *
************************************************************
*/
if (puzzling)
abort_search = 1;
/*
************************************************************
* *
* First check to see if this is a command by calling *
* Option(). Option() will return a 0 if it didn't *
* recognize the command; otherwise it returns a 1 if *
* the command was executed, or a 2 if we need to abort *
* the search to execute the command. *
* *
************************************************************
*/
else
do {
readstat = Read(0, buffer);
if (readstat <= 0)
break;
nargs = ReadParse(buffer, args, " ;");
if (nargs == 0) {
Print(128, "ok.\n");
break;
}
if (strcmp(args[0], ".")) {
save_move_number = move_number;
if (!wtm)
move_number--;
if (root_wtm)
Print(128, "Black(%d): %s\n", move_number, buffer);
else
Print(128, "White(%d): %s\n", move_number, buffer);
move_number = save_move_number;
}
/*
************************************************************
* *
* "." command displays status of current search. *
* *
************************************************************
*/
if (!strcmp(args[0], ".")) {
if (xboard) {
end_time = ReadClock();
time_used = (end_time - start_time);
printf("stat01: %d ", time_used);
printf(BMF " ", tree->nodes_searched);
printf("%d ", iteration_depth);
for (i = 0; i < n_root_moves; i++)
if (!(root_moves[i].status & 128))
left++;
printf("%d %d\n", left, n_root_moves);
fflush(stdout);
break;
} else {
end_time = ReadClock();
time_used = (end_time - start_time);
printf("time:%s ", DisplayTime(time_used));
printf("nodes:" BMF "\n", tree->nodes_searched);
DisplayTreeState(block[0], 1, 0, ply);
}
}
/*
************************************************************
* *
* "mn" command is used to set the move number to a *
* specific value... *
* *
************************************************************
*/
else if (!strcmp("mn", args[0])) {
if (nargs == 2) {
move_number = atoi(args[1]);
Print(128, "move number set to %d\n", move_number);
}
}
/*
************************************************************
* *
* "?" command says "move now!" *
* *
************************************************************
*/
else if (!strcmp(args[0], "?")) {
if (thinking) {
time_abort = 1;
abort_search = 1;
}
}
/*
************************************************************
* *
* Next see if Option() recognizes this as a command. *
* *
************************************************************
*/
else {
save_move_number = move_number;
if (!analyze_mode && !wtm)
move_number--;
result = Option(tree);
move_number = save_move_number;
if (result >= 2) {
if (thinking && result != 3)
Print(128, "command not legal now.\n");
else {
abort_search = 1;
input_status = 2;
break;
}
} else if ((result != 1) && analyze_mode) {
abort_search = 1;
input_status = 2;
break;
}
/*
************************************************************
* *
* Now, check to see if the operator typed a move. If *
* so, and it matched the predicted move, switch from *
* pondering to thinking to start the timer. If this *
* is a move, but not the predicted move, abort the *
* search, and start over with the right move. *
* *
************************************************************
*/
else if (!result) {
if (pondering) {
nargs = ReadParse(buffer, args, " ;");
temp = InputMove(tree, args[0], 0, Flip(root_wtm), 1, 1);
if (temp) {
if ((From(temp) == From(ponder_move)) &&
(To(temp) == To(ponder_move)) &&
(Piece(temp) == Piece(ponder_move)) &&
(Captured(temp) == Captured(ponder_move)) &&
(Promote(temp) == Promote(ponder_move))) {
predicted++;
input_status = 1;
pondering = 0;
thinking = 1;
opponent_end_time = ReadClock();
program_start_time = ReadClock();
Print(128, "predicted move made.\n");
} else {
input_status = 2;
abort_search = 1;
break;
}
} else if (!strcmp(args[0], "go") || !strcmp(args[0], "move") ||
!strcmp(args[0], "SP")) {
abort_search = 1;
break;
} else
Print(4095, "Illegal move: %s\n", args[0]);
} else
Print(4095, "unrecognized/illegal command: %s\n", args[0]);
}
}
} while (1);
if (log_file)
fflush(log_file);
}