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vgstation13/code/__HELPERS/sorts/MergeSort.dm
2015-11-20 03:17:06 +01:00

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//merge-sort - gernerally faster than insert sort, for runs of 7 or larger
/proc/sortMerge(list/L, cmp=/proc/cmp_numeric_asc, associative, fromIndex=1, toIndex)
if(L && L.len >= 2)
fromIndex = fromIndex % L.len
toIndex = toIndex % (L.len+1)
if(fromIndex <= 0)
fromIndex += L.len
if(toIndex <= 0)
toIndex += L.len + 1
sortInstance.L = L
sortInstance.cmp = cmp
sortInstance.associative = associative
sortInstance.mergeSort(fromIndex, toIndex)
return L