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added insertion sort and regression test

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Ahmet Inan 2024-03-07 19:45:47 +01:00
commit 524571e6fb
2 changed files with 73 additions and 0 deletions
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/*
Some stable sorting algorithms
Copyright 2024 Ahmet Inan <inan@aicodix.de>
*/
#pragma once
template <typename TYPE>
static void insertion_sort(TYPE *a, int n)
{
for (int i = 1, j; i < n; ++i) {
TYPE t = a[i];
for (j = i; j > 0 && a[j-1] > t; --j)
a[j] = a[j-1];
a[j] = t;
}
}
template <typename TYPE>
static void insertion_sort(int *p, TYPE *a, int n)
{
p[0] = 0;
for (int i = 1, j; i < n; ++i) {
TYPE t = a[i];
for (j = i; j > 0 && a[j-1] > t; --j) {
a[j] = a[j-1];
p[j] = p[j-1];
}
a[j] = t;
p[j] = i;
}
}