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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <tak.h>
#include <minimax_cnn1986.h>
FILE *lcd = NULL;
static char *gamelog = 0;
static int human, search_depth;
static void
append_to_gamelog(const char *line, const uint8_t win_line) {
// I _could_ dynamically compute the size but ... don't let
// `perfect' be the enemy of `good' ?
char prepend[8];
if (win_line) {
prepend[0] = '\n';
prepend[1] = 0;
} else if (ply & 1) {
snprintf(prepend, 7, "%s%d. ",
(ply == 1) ? "" : "\n", ply/2+1);
} else {
strcpy(prepend, " ");
}
// Make room for this line
gamelog = realloc(gamelog,
strlen(gamelog)
+ strlen(prepend)
+ strlen(line) + 1);
strcat(gamelog,prepend);
strcat(gamelog,line);
}
static void
end_game(char *line, char *win) {
append_to_gamelog(line, 0);
append_to_gamelog(win, 1);
fputs("Game over: ",lcd);
fputs(win,lcd);
fflush(lcd);
}
static int
handle_turn(char *line) {
// Track win state
uint8_t new_win = (won == 0xFF);
switch (do_ptn(line)) {
// Errors
case PTN_INVALID: { fputs("Invalid PTN.",lcd); return -1; break; }
case ACT_ILLEGAL: { fputs("Illegal action.",lcd); return -1; break; }
case ACT_OVERFLOW: {
fputs("Move would cause internal overflow, select another.");
return EXIT_FAILURE;
break;
}
// Game has ended
case GAME_END: {
// Did it end this turn?
if (new_win) {
switch (won) {
case WIN_DRAW: { end_game(line,"1/2-1/2"); break; }
case WIN_FLAT_BLACK: { end_game(line,"0-F"); break; }
case WIN_FLAT_WHITE: { end_game(line,"F-0"); break; }
case WIN_ROAD_BLACK: { end_game(line,"0-R"); break; }
case WIN_ROAD_WHITE: { end_game(line,"R-0"); break; }
}
}
fputs("Game over, enter `new' to play again.");
if (! new_win) return EXIT_FAILURE;
break;
}
// Valid, append to game log
case PTN_VALID:
case ACT_OK: {
append_to_gamelog(line, 0);
break;
}
}
return EXIT_SUCCESS;
}
static void
new_game(uint8_t size) {
reset_state(size);
fputs("New 5x5 game! ct1986 at search depth ");
fputc(search_depth + '0', lcd);
fputc('.', lcd);
fflush(lcd);
if (gamelog) gamelog = realloc(gamelog, sizeof(char));
else gamelog = malloc(sizeof(char));
gamelog[0] = 0;
}
// Set up output function for ct1986
inline void
ct1986_display_progress(const uint8_t depth) {
if (depth == 0) {
fputc('#', lcd);
}
}
static int
ct1986_turn(const uint8_t search_depth) {
// Prepare progress bar
fputs("Computing ");
// Run the minimax
float minimax = ct1986_generate(search_depth);
// Failed to find a move?
if ((minimax <= -infty && (ply & 1) == 1)
||(minimax >= infty && (ply & 1) == 0)) {
fputs("Opponent concedes!");
return EXIT_FAILURE;
} else {
fputs("Result: ");
fputs(ct1986_ptn);
handle_turn(ct1986_ptn);
return EXIT_SUCCESS;
}
}
static int
input_is_not_turn(const char *line) {
if (!strcmp(line,"help")) {
fputs("Valid commands: depth [0-9], help, new, \
play (b|w), self-play, <PTN>.");
} else if (!strcmp(line,"log")) {
fputs(gamelog);
} else if (!strcmp(line,"new")) {
new_game(5);
} else if (!strcmp(line,"self-play")) {
while (ct1986_turn(search_depth) == 0);
} else if (!strncmp(line,"depth",5)) {
if (strnlen(line,7) == 7 && line[6] >= '0' && line[6] <= '9') {
search_depth = line[6] - '0';
fputs("New search depth: ",lcd);
fputc(line[6], lcd);
fflush(lcd);
} else {
fputs("Usage: depth [0-9].",lcd);
}
} else if (!strncmp(line,"play",4)) {
if (strnlen(line,7) == 6
&& ((line[5] == 'b' || line[5] == 'B')
|| (line[5] == 'w' || line[5] == 'W'))) {
// 'b' is even :)
human = 1 - (line[5] & 1);
new_game(5);
} else {
fputs("Usage: play (b|w).\n", lcd);
}
} else {
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int
main(int argc, char **argv) {
(void)(argc);
(void)(argv);
lcd = fopen("/dev/lcd","w");
if (lcd == NULL) return EXIT_FAILURE;
human = 0;
search_depth = 1;
new_game(5);
char *line = NULL;
ssize_t read;
size_t alloc_size;
for (int playing = 1; playing;) {
fputs("Welcome to ct1986!\n",lcd); fflush(lcd);
fflush(stdout);
while ((human == 0) && (read = getline(&line, &alloc_size, stdin)) != -1) {
if (read) {
line[read - 1] = 0;
if (input_is_not_turn(line)) {
int r = handle_turn(line);
if (r == EXIT_SUCCESS && won == 0xFF) {
human = 1;
}
}
}
}
if ((human == 0) && (read == -1)) {
playing = 0;
} else {
ct1986_turn(search_depth);
human = 0;
}
}
return 0;
}
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