131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <sqlite3.h>
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#include "segmenttree.h"
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int main(int argc, char* argv[]) {
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char *file = "cards";
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bool verbose = false;
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/* Proccess args */
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static struct option long_options[] = {
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{"file", required_argument, NULL, 'f'},
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{"verbose", no_argument, NULL, 'v'}
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};
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while (1) {
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int option_index = 0;
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int c = getopt_long(argc, argv, "f:v", long_options, &option_index);
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if (c == -1) break;
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switch (c) {
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case 'f': file = strdup(optarg); break;
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case 'v': verbose = true; break;
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default: abort();
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}
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}
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/* Seed the RNG */
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srand(time(0));
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/* Connect to db */
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sqlite3 *db;
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int rc = sqlite3_open(file, &db);
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if (rc) {
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fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
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abort();
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}
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/* Get number of cards */
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sqlite3_stmt *stmt;
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rc = sqlite3_prepare_v3(db, "SELECT COUNT(*) FROM cards", -1, 0, &stmt, NULL);
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if (rc != SQLITE_OK) {
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fprintf(stderr, "Database error: %s\n", sqlite3_errmsg(db));
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abort();
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}
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sqlite3_step(stmt);
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int N = sqlite3_column_int(stmt, 0);
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sqlite3_finalize(stmt);
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/* Get card weights */
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rc = sqlite3_prepare_v3(db, "SELECT weight FROM cards", -1, 0, &stmt, NULL);
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if (rc != SQLITE_OK) {
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fprintf(stderr, "Database error: %s\n", sqlite3_errmsg(db));
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abort();
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}
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seg = malloc(4 * N * sizeof(int));
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build(stmt, 0, N - 1, 1);
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sqlite3_finalize(stmt);
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if (verbose) {
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for (int i = 0; i < N; i++) {
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printf("%d ", seg[i]);
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}
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printf("\n");
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}
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/* Disable input buffering */
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system("stty -F /dev/tty cbreak min 1");
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system("stty -F /dev/tty -echo");
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while (true) {
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int x = (long long)rand() * rand() % seg[1];
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int res[2];
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query(res, x, 0, N-1, 1);
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int w = res[0], i = res[1];
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if (verbose) {
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printf("%d %d %d %d\n", seg[1], x, w, i);
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}
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/* Get card contents from database */
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rc = sqlite3_prepare_v3(db, "SELECT key, val FROM cards WHERE idx=?", -1, 0, &stmt, NULL);
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if (rc != SQLITE_OK) {
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fprintf(stderr, "Database error: %s\n", sqlite3_errmsg(db));
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abort();
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}
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sqlite3_bind_int(stmt, 1, i);
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sqlite3_step(stmt);
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char *key, *val;
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key = strdup(sqlite3_column_text(stmt, 0));
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val = strdup(sqlite3_column_text(stmt, 1));
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sqlite3_finalize(stmt);
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printf("> %s\n", key);
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/* Wait for confirmation */
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char b = getchar();
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printf("%s\n", val);
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/* Read user input */
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b = getchar();
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if (b == 'y') {
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w >>= 1;
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}
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else if (b == 'n') {
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w <<= 3;
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}
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else {
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break;
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}
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/* Update segment tree and database */
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update(i, w, 0, N - 1, 1);
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rc = sqlite3_prepare_v3(db, "UPDATE cards SET weight=? WHERE idx=?", -1, 0, &stmt, NULL);
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if (rc != SQLITE_OK) {
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fprintf(stderr, "Database error: %s\n", sqlite3_errmsg(db));
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abort();
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}
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sqlite3_bind_int(stmt, 1, w);
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sqlite3_bind_int(stmt, 2, i);
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sqlite3_finalize(stmt);
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}
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/* Cleanup */
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system("stty -F /dev/tty echo");
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sqlite3_close(db);
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}
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