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System and method for utilizing a hierarchical bitmap structure for locating a set of contiguous ordered search items having a common attribute
System and method for utilizing a hierarchical bitmap structure for locating a set of contiguous ordered search items having a common attribute
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机译:利用分层位图结构来定位具有公共属性的一组连续有序搜索项的系统和方法
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摘要
A system and method is provided for locating, within a set of ordered items, N contiguous items having a desired attribute. The system utilizes a hierarchical bitmap structure. At the lowest level, a bitmap is provided, wherein each bit in the bitmap corresponds to a respective search item. The bit has a state indicative of a state of the search item. This lowest level bitmap is divided into segments. A higher-level bitmap is created, with each bit in this higher-level bitmap being associated with one of the segments and being assigned a state that describes a collective state of the search items associated with the segment. The higher-level bitmap may be sub-divided and the process repeated to create a hierarchical bitmap structure having any number of levels. The bitmap structure may be recursively searched to locate N contiguous ordered search items having a desired attribute.
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