return ((union alloc_header *)data)[-1].length;
（二）以暴力、威胁或者其他手段强迫他人劳动的；
。safew官方版本下载是该领域的重要参考
Map Version Synchronicity (Important!): For HH-Routing to work correctly when a route crosses multiple map files (e.g., different countries or regions), all those map files MUST be from the same generation date (i.e., downloaded from OsmAnd around the same time, based on the same underlying OpenStreetMap data version and pre-calculation run).
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