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LibC: Implement twalk

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This commit is contained in:
Tim Schumacher 2021-10-14 20:46:26 +02:00 • committed by Brian Gianforcaro
parent 7448626bae
commit 4b423a5ec7
3 changed files with 145 additions and 0 deletions
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24
Userland/Libraries/LibC/search.cpp
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@ -89,4 +89,28 @@ void* tfind(const void* key, void* const* rootp, int (*comparator)(const void*,
return nullptr;
}
static void twalk_internal(const struct search_tree_node* node, void (*action)(const void*, VISIT, int), int depth)
{
if (!node)
return;
if (!node->right && !node->left) {
action(node, leaf, depth);
return;
}
action(node, preorder, depth);
twalk_internal(node->left, action, depth + 1);
action(node, postorder, depth);
twalk_internal(node->right, action, depth + 1);
action(node, endorder, depth);
}
void twalk(const void* rootp, void (*action)(const void*, VISIT, int))
{
auto node = static_cast<const struct search_tree_node*>(rootp);
twalk_internal(node, action, 0);
}
}

8
Userland/Libraries/LibC/search.h
View file

@ -8,7 +8,15 @@
__BEGIN_DECLS
typedef enum {
preorder,
postorder,
endorder,
leaf,
} VISIT;
void* tsearch(const void*, void**, int (*)(const void*, const void*));
void* tfind(const void*, void* const*, int (*)(const void*, const void*));
void twalk(const void*, void (*)(const void*, VISIT, int));
__END_DECLS