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#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sqlite3.h>
#include "segmenttree.h"
int main(int argc, char *argv[]) {
char *file = "cards";
bool verbose = false;
bool noninteractive = false;
/* Proccess args */
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-v") == 0) verbose = true;
else if (strcmp(argv[i], "-n") == 0) noninteractive = true;
else file = argv[i];
}
/* Seed the RNG */
srand(time(0));
/* Connect to db */
sqlite3 *db;
sqlite3_open(file, &db);
/* Get number of cards */
sqlite3_stmt *stmt;
sqlite3_prepare_v3(db, "SELECT COUNT(*) FROM cards", -1, 0, &stmt, NULL);
sqlite3_step(stmt);
int N = sqlite3_column_int(stmt, 0);
sqlite3_finalize(stmt);
/* Get card weights */
sqlite3_prepare_v3(db, "SELECT weight FROM cards", -1, 0, &stmt, NULL);
seg = (int*)malloc(4 * N * sizeof(int));
build(stmt, 0, N - 1, 1);
sqlite3_finalize(stmt);
if (verbose) {
for (int i = 0; i < 4 * N; i++) {
printf("%d ", seg[i]);
}
printf("\n");
}
if (!noninteractive) {
/* Disable input buffering */
assert(system("stty -F /dev/tty cbreak min 1") == 0);
assert(system("stty -F /dev/tty -echo") == 0);
}
while (true) {
/* Make sure sum of weights is positive */
assert(seg[1] > 0);
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 */
sqlite3_prepare_v3(db, "SELECT key, val FROM cards WHERE idx=?", -1, 0, &stmt, NULL);
sqlite3_bind_int(stmt, 1, i);
sqlite3_step(stmt);
printf("> %s\n", sqlite3_column_text(stmt, 0));
if (noninteractive) {
fflush(stdout);
}
/* Wait for confirmation */
getchar();
if (noninteractive) {
/* Skip newline */
getchar();
}
printf("%s\n", sqlite3_column_text(stmt, 1));
if (noninteractive) {
fflush(stdout);
}
sqlite3_finalize(stmt);
/* Read user input */
char b = getchar();
if (noninteractive) {
/* Skip newline */
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);
sqlite3_prepare_v3(db, "UPDATE cards SET weight=? WHERE idx=?", -1, 0, &stmt, NULL);
sqlite3_bind_int(stmt, 1, w);
sqlite3_bind_int(stmt, 2, i);
sqlite3_step(stmt);
sqlite3_finalize(stmt);
}
/* Cleanup */
sqlite3_close(db);
}
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