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Make the sort stable.

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Doesn't really matter, but it might as well be.

[SVN r51505]
This commit is contained in:
Daniel James
2009-03-01 14:15:39 +00:00
parent 40a89ac649
commit 3e55934381
1 changed files with 21 additions and 7 deletions
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28
test/helpers/list.hpp
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@ -243,14 +243,28 @@ namespace test
node** merge_adjacent_ranges(node** first, node** second, node** merge_adjacent_ranges(node** first, node** second,
node** third, Less less) node** third, Less less)
{ {
while(first != second) { while(true) {
if(less((*second)->value_, (*first)->value_)) { while(true) {
swap_adjacent_ranges(first, second, third); if(first == second) return third;
std::swap(second, third); if(less((*second)->value_, (*first)->value_)) break;
} first = &(*first)->next_;
first = &(*first)->next_; }
swap_adjacent_ranges(first, second, third);
first = &(*first)->next_;
// Since the two ranges we just swapped, the order is now:
// first...third...second
while(true) {
if(first == third) return second;
if(!less((*first)->value_, (*third)->value_)) break;
first = &(*first)->next_;
}
swap_adjacent_ranges(first, third, second);
first = &(*first)->next_;
} }
return third;
} }
void swap_adjacent_ranges(node** first, node** second, node** third) void swap_adjacent_ranges(node** first, node** second, node** third)