Communications of the ACM

Home/Magazine Archive/May 1975 (Vol. 18, No. 5)/Copying cyclic list structures in linear time using.../Abstract

Copying cyclic list structures in linear time using bounded workspace

By David A. Fisher
Communications of the ACM, May 1975, Vol. 18 No. 5, Pages 251-252
10.1145/360762.360764
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A bounded workspace copying algorithm for arbitrary list structures is given. This algorithm operates in linear time and does not require tag bits. The best previous bounded workspace copying algorithms achieved n2 time without tag bits and n log n time with one tag. The only restriction on the algorithm given here is that the copy must be placed into a contiguous section of memory. The method is applicable to fixed or variable size nodes.

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