gistfile1.txt

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <olegdb/oleg.h>

/* Compile with:
 * gcc -g3 -O2 basic.c -o test_basic -loleg
 */

int main(int argc, char *argv[]) {
    const char *key = "mykey";
    const int keylen = strlen(key);

    ol_database *db = NULL;
    const int features = OL_F_APPENDONLY | OL_F_LZ4 | OL_F_AOL_FFLUSH | OL_F_SPLAYTREE;

    unsigned char *raw_data = NULL;
    size_t dsize = 0;

    db = ol_open("/tmp/test_oleg/", "test_oleg", features);

    if (db == NULL)
        return 1;

    if (ol_exists(db, key, keylen)) {
        printf("First run!\n");

        int counter = 1;
        if (ol_jar(db, key, keylen, (unsigned char *)&counter, sizeof(int)) != 0) {
            ol_close(db);
            return 1;
        }
    } else {
        ol_unjar(db, key, keylen, &raw_data, &dsize);
        printf("You already ran me %i times.\n", (int)*raw_data);

        int *counter = (int *)raw_data;
        *counter += 1;

        if (ol_jar(db, key, keylen, (unsigned char *)counter, sizeof(int)) != 0) {
            free(raw_data);
            ol_close(db);
            return 1;
        }

        free(raw_data);
    }

    ol_close(db);
    return 0;
}