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* mergesort: rename it to llist_mergesort()Junio C Hamano2012-04-171-4/+4
| | | | | | | | | | | | | Even though the function is generic enough, <anything>sort() inherits connotations from the standard function qsort() that sorts an array. Rename it to llist_mergesort() and describe the external interface in its header file. This incidentally avoids name clashes with mergesort() some platforms declare in, and contaminate user namespace with, their <stdlib.h>. Reported-by: Brian Gernhardt Signed-off-by: Junio C Hamano <gitster@pobox.com>
* add mergesort() for linked listsRené Scharfe2012-04-111-0/+73
This adds a generic bottom-up mergesort implementation for singly linked lists. It was inspired by Simon Tatham's webpage on the topic[1], but not so much by his implementation -- for no good reason, really, just a case of NIH. [1] http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>