Method prepare

src/networkfilemanager.cpp:586–594

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std::unique_ptr<SQLiteStatement> DiskChunkCache::prepare(const char *sql) {
    sqlite3_stmt *hStmt = nullptr;
    sqlite3_prepare_v2(hDB_, sql, -1, &hStmt, nullptr);
    if (!hStmt) {
        pj_log(ctx_, PJ_LOG_ERROR, "%s", sqlite3_errmsg(hDB_));
        return nullptr;
    }
    return std::unique_ptr<SQLiteStatement>(new SQLiteStatement(hStmt));
}

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