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#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "uci/internals/response.h"
#include "uci/state.h"
#include "fen.h"
void handle_uci(uci_state_t *state, uci_cmd_t cmd) {
if (state->current_state == UCI_STATE_INITIAL) {
return handle_initial(state, cmd);
}
if (state->current_state == UCI_STATE_IDLE) {
return handle_idle(state, cmd);
}
if (state->current_state == UCI_STATE_SYNC) {
return handle_sync(state, cmd);
}
if (state->current_state == UCI_STATE_PING) {
return handle_ping(state, cmd);
}
if (state->current_state == UCI_STATE_ACTIVE) {
return handle_active(state, cmd);
}
return handle_halt(state, cmd);
}
void handle_initial(uci_state_t *state, uci_cmd_t cmd) {
if (cmd.empty || strcmp(cmd.root, "uci") != 0) return;
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 5 SECONDS
printf("id name %s\n", state->name);
printf("id author %s\n", state->author);
int settings_count = sizeof(state->option_settings)/sizeof(option_setting_t);
for (int i = 0; i < settings_count; i++) {
print_setting(state->option_settings[i]);
}
// ---
printf("uciok\n");
state->current_state = UCI_STATE_IDLE;
}
void handle_idle(uci_state_t *state, uci_cmd_t cmd) {
if (cmd.empty) return;
if (strcmp(cmd.root, "debug") == 0) {
state->debug = strcmp(uci_cmd_get_arg(cmd, 0), "on") == 0;
} else if (strcmp(cmd.root, "setoption") == 0) {
char buffer[2048] = {0};
char name[64] = {0};
char *cursor = name;
for (int i = 1; i < cmd.args_count; i++) {
assert((long)cursor - (long)buffer < 2048);
char *arg = uci_cmd_get_arg(cmd, i);
if (strcmp(arg, "value") == 0) {
*(--cursor) = 0;
cursor = buffer;
continue;
}
cursor = stpncpy(cursor, arg, MAX_TOKEN_SIZE);
*(cursor++) = ' ';
}
*(--cursor) = 0;
apply_option(state, name, buffer);
} else if (strcmp(cmd.root, "ucinewgame") == 0) {
} else if (strcmp(cmd.root, "position") == 0) {
int k = 0;
char* mode = uci_cmd_get_arg(cmd, 0);
if (strcmp(mode, "startpos") == 0) {
struct fen_load fen = load_fen(
"rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
);
assert(fen.failed == 0);
state->position = fen.position;
}
else if (strcmp(mode, "fen") == 0) {
struct fen_load fen = load_fen(uci_cmd_get_arg(cmd, k++));
if (fen.failed) {
printf("info invalid fen\n");
return;
}
state->position = fen.position;
} else { assert(0 && "Invalid argument for position command"); }
if (cmd.args_count >= k) return;
assert(strcmp(uci_cmd_get_arg(cmd, k++), "moves") == 0);
assert(state->moves->count <= cmd.args_count - k);
int old_move_count = state->moves->count;
state->moves->count = cmd.args_count - k;
k += old_move_count;
for (; k < cmd.args_count; k++) {
char* move = uci_cmd_get_arg(cmd, k);
add_ipc_move(
state->moves,
(ipc_move_t) {
(move[0] - 'a') * 8 + (move[1] - '1'),
(move[2] - 'a') * 8 + (move[3] - '1')
}
);
}
} else if (strcmp(cmd.root, "stop") == 0) {
} else if (strcmp(cmd.root, "quit") == 0) {
free(cmd.args);
int settings_count = sizeof(state->option_settings)/sizeof(option_setting_t);
for (int i = 0; i < settings_count; i++) {
option_setting_t setting = state->option_settings[i];
if (OPTION_STRING != setting.type) continue;
free(setting.value.string->data);
}
state->signal = UCI_SIGNAL_QUIT;
} else if (strcmp(cmd.root, "isready") == 0) {
state->current_state = UCI_STATE_SYNC;
} else if (strcmp(cmd.root, "go") == 0) {
go_args_t info = (go_args_t) {0};
for (int i = 0; i < cmd.args_count; i++) {
if (strcmp(uci_cmd_get_arg(cmd, i), "searchmoves") == 0) {
ipc_moves_init(&info.searchmoves);
for (i++; i < cmd.args_count; i++) {
char* move_str = uci_cmd_get_arg(cmd, i);
if (move_str[1] < '0' || move_str[1] > '9') break;
add_ipc_move(&info.searchmoves, (ipc_move_t) {
(move_str[0] - 'a') * 8 + (move_str[1] - '1'),
(move_str[2] - 'a') * 8 + (move_str[3] - '1')
});
}
i--;
// it was harsh on my eyes, that's why i did this formatting
} else if (strcmp(uci_cmd_get_arg(cmd, i), "ponder") == 0) {
info.ponder = true;
} else if (strcmp(uci_cmd_get_arg(cmd, i), "wtime") == 0) {
info.wtime = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "btime") == 0) {
info.btime = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "winc") == 0) {
info.winc = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "binc") == 0) {
info.binc = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "movestogo") == 0) {
info.movestogo = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "depth") == 0) {
info.depth = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "nodes") == 0) {
info.nodes = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "mate") == 0) {
info.mate = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "movetime") == 0) {
info.movetime = atoi(uci_cmd_get_arg(cmd, ++i));
} else if (strcmp(uci_cmd_get_arg(cmd, i), "infinite") == 0) {
info.infinite = true;
} else if (strcmp(uci_cmd_get_arg(cmd, i), "perft") == 0) {
info.perft = atoi(uci_cmd_get_arg(cmd, ++i));
}
}
memcpy(&state->go_args, &info, sizeof(info));
state->signal = UCI_SIGNAL_GO;
state->current_state = UCI_STATE_ACTIVE;
} else {
printf("info violation\n");
}
}
void handle_sync(uci_state_t *state, uci_cmd_t cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 5 SECONDS
// ---
printf("readyok\n");
state->current_state = UCI_STATE_IDLE;
}
void handle_ping(uci_state_t *state, uci_cmd_t cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 1 SECONDS
// if (TODO) {
// printf("bestmove\n");
// current_state = UCI_STATE_IDLE;
// }
// ---
printf("readyok\n");
state->current_state = UCI_STATE_ACTIVE;
}
void handle_active(uci_state_t *state, uci_cmd_t cmd) {
if (cmd.empty) {
return;
}
if (strcmp(cmd.root, "isready") == 0) {
state->current_state = UCI_STATE_PING;
} else if (strcmp(cmd.root, "stop") == 0) {
state->current_state = UCI_STATE_HALT;
} else {
printf("info violation\n");
}
}
void handle_halt(uci_state_t *state, uci_cmd_t cmd) {
// TIMEOUT NOTICE: THE FOLLOWING BLOCK SHOULDN'T TAKE MORE THAN 1 SECONDS
state->signal = UCI_SIGNAL_STOP;
// ---
state->current_state = UCI_STATE_IDLE;
}
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