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broken trees

main
Brett 2024-03-05 12:14:36 -05:00
parent 232d5fe4cd
commit 8c531f0759
2 changed files with 127 additions and 137 deletions
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1
tests/include/lilfbtf/test2.h
View File

@ -23,6 +23,7 @@ namespace fb
{ {
void execute(); void execute();
void funny(); void funny();
inline void execute_tests() inline void execute_tests()

263
tests/src/tests2.cpp
View File

@ -42,126 +42,68 @@ namespace fb
public: public:
}; };
void execute()
{
}
enum class type_t enum class type_t
{ {
ADD, SUB, MUL, VALUE ADD, SUB, MUL, VALUE
}; };
static constexpr blt::u64 SEED = 691;
struct random_engine
{
private:
std::mt19937_64 engine{SEED};
public:
random_engine() = default;
void reset(blt::u64 seed = SEED)
{
engine = std::mt19937_64{seed};
}
auto& get()
{
return engine;
}
} engine;
type_t random_type() type_t random_type()
{ {
static std::random_device dev; static std::random_device dev;
static std::mt19937_64 engine{dev()};
static std::uniform_int_distribution dist(0, 3); static std::uniform_int_distribution dist(0, 3);
return static_cast<type_t>(dist(engine)); return static_cast<type_t>(dist(engine.get()));
} }
type_t random_type_sub() type_t random_type_sub()
{ {
static std::random_device dev; static std::random_device dev;
static std::mt19937_64 engine{dev()};
static std::uniform_int_distribution dist(0, 2); static std::uniform_int_distribution dist(0, 2);
return static_cast<type_t>(dist(engine)); return static_cast<type_t>(dist(engine.get()));
} }
double random_value() double random_value()
{ {
static std::random_device dev; static std::random_device dev;
static std::mt19937_64 engine{dev()};
static std::uniform_real_distribution dist(-10.0, 10.0); static std::uniform_real_distribution dist(-10.0, 10.0);
return dist(engine); return dist(engine.get());
} }
bool choice() bool choice()
{ {
static std::random_device dev; static std::random_device dev;
static std::mt19937_64 engine{dev()};
static std::uniform_int_distribution dist(0, 1); static std::uniform_int_distribution dist(0, 1);
return dist(engine); return dist(engine.get());
} }
std::array<blt::i32, 4> arg_c = {2, 2, 2, 0}; std::array<blt::i32, 4> arg_c = {2, 2, 2, 0};
blt::size_t t1_add = 0;
struct construct_info blt::size_t t1_sub = 0;
{ blt::size_t t1_mul = 0;
type_t type; blt::size_t t1_val = 0;
double value; blt::size_t t2_add = 0;
blt::size_t t2_sub = 0;
explicit construct_info(type_t type): type(type), value(0) blt::size_t t2_mul = 0;
{ blt::size_t t2_val = 0;
if (type == type_t::VALUE)
value = random_value();
}
};
static_assert(std::is_trivially_copyable_v<construct_info>);
std::vector<construct_info> create_info(blt::size_t size)
{
std::vector<construct_info> info;
construct_info root = construct_info{random_type()};
std::stack<std::pair<construct_info, blt::size_t>> stack;
stack.emplace(root, 0);
while (!stack.empty())
{
auto top = stack.top();
auto node = top.first;
auto depth = top.second;
info.push_back(node);
stack.pop();
for (blt::i32 i = 0; i < arg_c[static_cast<int>(info.back().type)]; i++)
{
if (depth >= size)
{
break;
} else if (depth == size - 1)
{
stack.emplace(construct_info{type_t::VALUE}, depth + 1);
} else
{
if (choice())
stack.emplace(construct_info{random_type()}, depth + 1);
else
stack.emplace(construct_info{random_type_sub()}, depth + 1);
}
}
}
return info;
}
void type_stats(const std::vector<construct_info>& info)
{
blt::size_t add = 0;
blt::size_t sub = 0;
blt::size_t mul = 0;
blt::size_t val = 0;
for (const auto& v : info)
{
switch (v.type)
{
case type_t::ADD:
add++;
break;
case type_t::SUB:
sub++;
break;
case type_t::MUL:
mul++;
break;
case type_t::VALUE:
val++;
break;
}
}
BLT_INFO("We have %ld adds, %ld subs, %ld mul, %ld val", add, sub, mul, val);
}
class tree1 class tree1
{ {
@ -176,9 +118,27 @@ namespace fb
blt::i32 argc; blt::i32 argc;
type_t type; type_t type;
explicit node_t(type_t type, double value, blt::bump_allocator<true>& alloc): explicit node_t(type_t type, blt::bump_allocator<true>& alloc):
alloc(alloc), value(value), argc(arg_c[static_cast<int>(type)]), type(type) alloc(alloc), argc(arg_c[static_cast<int>(type)]), type(type)
{} {
if (type == type_t::VALUE)
value = random_value();
switch (type)
{
case type_t::ADD:
t1_add++;
break;
case type_t::SUB:
t1_sub++;
break;
case type_t::MUL:
t1_mul++;
break;
case type_t::VALUE:
t1_val++;
break;
}
}
void evaluate() void evaluate()
{ {
@ -211,8 +171,12 @@ namespace fb
auto* top = nodes.top(); auto* top = nodes.top();
node_stack.push(top); node_stack.push(top);
nodes.pop(); nodes.pop();
BLT_INFO("%ld type %d", top->argc, static_cast<int>(top->type));
for (blt::i32 i = 0; i < top->argc; i++) for (blt::i32 i = 0; i < top->argc; i++)
{
BLT_TRACE("Child %p", top->children[i]);
nodes.push(top->children[i]); nodes.push(top->children[i]);
}
} }
while (!node_stack.empty()) while (!node_stack.empty())
@ -239,30 +203,9 @@ namespace fb
node_t* root = nullptr; node_t* root = nullptr;
public: public:
void create(const std::vector<construct_info>& info) void create(blt::u64 size)
{ {
// root = alloc.emplace<node_t>(random_type(), alloc); root = alloc.emplace<node_t>(random_type(), alloc);
// std::stack<std::pair<node_t*, blt::size_t>> stack;
// stack.emplace(root, 0);
// while (!stack.empty())
// {
// auto top = stack.top();
// auto* node = top.first;
// auto depth = top.second;
// stack.pop();
// for (blt::i32 i = 0; i < node->argc; i++)
// {
// auto& assignment = node->children[i];
// if (choice())
// assignment = alloc.emplace<node_t>(random_type(), alloc);
// else
// assignment = alloc.emplace<node_t>(random_type_sub(), alloc);
// if (depth < size)
// stack.emplace(assignment, depth + 1);
// }
// }
root = alloc.emplace<node_t>(info[0].type, info[0].value, alloc);
blt::size_t index = 1;
std::stack<std::pair<node_t*, blt::size_t>> stack; std::stack<std::pair<node_t*, blt::size_t>> stack;
stack.emplace(root, 0); stack.emplace(root, 0);
while (!stack.empty()) while (!stack.empty())
@ -274,11 +217,24 @@ namespace fb
for (blt::i32 i = 0; i < node->argc; i++) for (blt::i32 i = 0; i < node->argc; i++)
{ {
auto& assignment = node->children[i]; auto& assignment = node->children[i];
assignment = alloc.emplace<node_t>(info[index].type, info[index].value, alloc); if (depth >= size)
index++; {
stack.emplace(assignment, depth + 1); assignment = alloc.emplace<node_t>(type_t::VALUE, alloc);
continue;
}
if (choice())
assignment = alloc.emplace<node_t>(random_type(), alloc);
else
assignment = alloc.emplace<node_t>(random_type_sub(), alloc);
if (depth < size)
stack.emplace(assignment, depth + 1);
} }
} }
BLT_INFO("We have %ld adds, %ld subs, %ld mul, %ld val = %ld", t1_add, t1_sub, t1_mul, t1_val, t1_add + t1_sub + t1_mul + t1_val);
t1_add = 0;
t1_sub = 0;
t1_mul = 0;
t1_val = 0;
} }
double evaluate() double evaluate()
@ -310,8 +266,26 @@ namespace fb
node_t() = default; node_t() = default;
node_t(type_t type, double value): value(value), argc(u(type)), type(type) explicit node_t(type_t type): value(0), argc(u(type)), type(type)
{} {
if (type == type_t::VALUE)
value = random_value();
switch (type)
{
case type_t::ADD:
t2_add++;
break;
case type_t::SUB:
t2_sub++;
break;
case type_t::MUL:
t2_mul++;
break;
case type_t::VALUE:
t2_val++;
break;
}
}
}; };
static_assert(std::is_trivially_copyable_v<node_t>); static_assert(std::is_trivially_copyable_v<node_t>);
@ -322,14 +296,13 @@ namespace fb
public: public:
tree2() = default; tree2() = default;
void create(const std::vector<construct_info>& info) void create(blt::u64 SIZE)
{ {
size = static_cast<blt::size_t>(std::pow(2, std::log2(info.size()) + 1)); size = static_cast<blt::size_t>(std::pow(2, SIZE)) + 1;
BLT_INFO("Size %ld, %ld, %ld", size, static_cast<blt::size_t>(std::log2(info.size())), info.size()); BLT_INFO("Size %ld, %ld, %ld", size, static_cast<blt::size_t>(std::pow(2, SIZE + 1)), SIZE);
nodes = new node_t[size]; nodes = new node_t[size];
nodes[1] = node_t{info[0].type, info[0].value}; nodes[1] = node_t{random_type()};
blt::size_t index = 1;
std::stack<std::pair<blt::size_t, blt::size_t>> stack; std::stack<std::pair<blt::size_t, blt::size_t>> stack;
stack.emplace(1, 0); stack.emplace(1, 0);
while (!stack.empty()) while (!stack.empty())
@ -340,15 +313,27 @@ namespace fb
stack.pop(); stack.pop();
for (blt::i32 i = 0; i < nodes[node].argc; i++) for (blt::i32 i = 0; i < nodes[node].argc; i++)
{ {
blt::u64 insert; auto idx = child(node, i);
if (i & 1) auto& assignment = nodes[idx];
insert = right(node); if (depth >= size)
{
assignment = node_t{type_t::VALUE};
continue;
}
if (choice())
assignment = node_t{random_type()};
else else
insert = left(node); assignment = node_t{random_type_sub()};
nodes[insert] = node_t{info[index].type, info[index].value}; if (depth < size)
stack.emplace(index++, depth + 1); stack.emplace(idx, depth + 1);
} }
} }
BLT_INFO("We have %ld adds, %ld subs, %ld mul, %ld val = %ld", t1_add, t1_sub, t1_mul, t1_val, t1_add + t1_sub + t1_mul + t1_val);
}
static index child(index node, index i)
{
return node * 2 + i;
} }
static index left(index i) static index left(index i)
@ -418,15 +403,19 @@ namespace fb
void funny() void funny()
{ {
auto info = create_info(17); engine.reset();
type_stats(info);
tree1 love; tree1 love;
love.create(info); love.create(17);
BLT_TRACE(love.evaluate()); BLT_TRACE(love.evaluate());
engine.reset();
tree2 fem; tree2 fem;
fem.create(info); fem.create(17);
BLT_TRACE(fem.evaluate()); BLT_TRACE(fem.evaluate());
} }
void execute()
{
}
} }