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