Function store_open_internal

src/store/store.c:678–735

}

static cbm_store_t *store_open_internal(const char *path, bool in_memory, bool create) {
    cbm_store_t *s = calloc(CBM_ALLOC_ONE, sizeof(cbm_store_t));
    if (!s) {
        return NULL;
    }

    int flags = SQLITE_OPEN_READWRITE | (create ? SQLITE_OPEN_CREATE : 0);
    if (in_memory) {
        flags |= SQLITE_OPEN_MEMORY;
    }

    char open_path[4096];
    const char *effective_path = path;
    if (path && !in_memory) {
        if (!cbm_path_for_file_api(path, open_path, sizeof(open_path))) {
            free(s);
            return NULL;
        }
        effective_path = open_path;
    }
    int rc = sqlite3_open_v2(effective_path, &s->db, flags, NULL);
    if (rc != SQLITE_OK) {
        sqlite3_close(s->db);
        free(s);
        return NULL;
    }

    if (path && !in_memory) {
        s->db_path = heap_strdup(path);
    }

    /* Security: block ATTACH/DETACH to prevent file creation via SQL injection.
     * The authorizer runs inside SQLite's query planner — no string-level bypass. */
    sqlite3_set_authorizer(s->db, store_authorizer, NULL);

    /* Register REGEXP function (SQLite doesn't have one built-in) */
    sqlite3_create_function(s->db, "regexp", ST_COL_2, SQLITE_UTF8 | SQLITE_DETERMINISTIC, NULL,
                            sqlite_regexp, NULL, NULL);
    /* Case-insensitive variant for search with case_sensitive=false */
    sqlite3_create_function(s->db, "iregexp", ST_COL_2, SQLITE_UTF8 | SQLITE_DETERMINISTIC, NULL,
                            sqlite_iregexp, NULL, NULL);
    /* Int8 cosine similarity for vector search */
    sqlite3_create_function(s->db, "cbm_cosine_i8", ST_COL_2, SQLITE_UTF8 | SQLITE_DETERMINISTIC,
                            NULL, sqlite_cosine_i8, NULL, NULL);
    /* camelCase splitter for FTS5 BM25 indexing */
    sqlite3_create_function(s->db, "cbm_camel_split", SKIP_ONE, SQLITE_UTF8 | SQLITE_DETERMINISTIC,
                            NULL, sqlite_camel_split, NULL, NULL);

    if (configure_pragmas(s, in_memory, false) != CBM_STORE_OK || init_schema(s) != CBM_STORE_OK ||
        create_user_indexes(s) != CBM_STORE_OK) {
        sqlite3_close(s->db);
        safe_str_free(&s->db_path);
        free(s);
        return NULL;
    }

    return s;
}