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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

6
Makefile
View File

@ -11,7 +11,7 @@ INC_DIRS ?= include
LIB := $(BUILD_DIR)/$(LIB_FILENAME)
SRCS != find '$(SRC_DIR)' -iname '*.c'
SRCS_H != find $(INC_DIRS) '$(SRC_DIR)' -iname '*.h'
SRCS_H != find $(INC_DIRS) -iname '*.h'
SRCS_TEST != find '$(TEST_DIR)' -iname '*.c'
OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
@ -43,7 +43,7 @@ objs: $(OBJS)
.PHONY: vieter
vieter: $(LIB)
$(LIB): $(OBJS)
$(BUILD_DIR)/$(LIB_FILENAME): $(OBJS)
ar -rcs $@ $(OBJS)
$(BUILD_DIR)/$(SRC_DIR)/%.c.o: $(SRC_DIR)/%.c
@ -69,6 +69,8 @@ $(TARGETS_MEM_TEST): test-mem-%: %
.PHONY: build-test
build-test: $(BINS_TEST)
# For simplicity, we link every object file to each of the test files. This
# might be changed later if this starts to become too slow.
$(BINS_TEST): %: %.c.o $(LIB)
$(CC) \
$^ -o $@

11
README.md
View File

@ -53,17 +53,6 @@ files defined in its respective module. This allows testing internal functions.
To run the tests, simply run `make test`. If you wish to only run a specific
test binary, you can find them in `build/test`.
The name of tests in the `TEST_LIST` variable should be prefixed with the
module they're testing. This makes it much easier to distinguish the output of
tests in the CLI. For example:
```c
TEST_LIST = {
{"cron illegal parts", test_illegal_parts},
{NULL, NULL}
};
```
### `compile_commands.json`
Clangd requires a `compile_commands.json` to function properly. You can

70
include/vieter_tree.h
View File

@ -1,70 +0,0 @@
#ifndef VIETER_TREE
#define VIETER_TREE
#include <stdint.h>
#include <stdlib.h>
typedef struct vieter_tree vieter_tree;
typedef enum vieter_tree_error {
vieter_tree_ok = 0,
vieter_tree_already_present = 1,
vieter_tree_not_present = 2,
vieter_tree_iterator_done = 3
} vieter_tree_error;
/*
* Allocate and initialize a new red-black binary tree.
*/
vieter_tree *vieter_tree_init();
/*
* Deallocate a red-black binary tree.
*/
void vieter_tree_free(vieter_tree *tree);
/*
* Insert a new entry into the tree.
*/
vieter_tree_error vieter_tree_insert(vieter_tree *tree, uint64_t key,
void *data);
/*
* Look for an entry in the tree.
*/
vieter_tree_error vieter_tree_search(void **out, vieter_tree *tree,
uint64_t key);
/*
* Remove a given entry from the tree.
*/
vieter_tree_error vieter_tree_remove(void **out, vieter_tree *tree,
uint64_t key);
/*
* Return how many entries are currently in the tree.
*/
uint64_t vieter_tree_size(vieter_tree *tree);
/*
* An iterator that can be used to traverse a tree in-order.
*/
typedef struct vieter_tree_iterator vieter_tree_iterator;
/*
* Allocate and initialize a new iterator from the given tree.
*/
vieter_tree_iterator *vieter_tree_iterator_from(vieter_tree *tree);
/*
* Free an iterator.
*/
void vieter_tree_iterator_free(vieter_tree_iterator **ptp);
/*
* Return the iterator's next element.
*/
vieter_tree_error vieter_tree_iterator_next(void **out,
vieter_tree_iterator *iter);
#endif

2
src/cron/vieter_cron_parse.c
View File

@ -1,4 +1,4 @@
#include "vieter_cron_parse.h"
#include "vieter_cron.h"
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

11
src/cron/vieter_cron_parse.h
View File

@ -1,11 +0,0 @@
#ifndef VIETER_CRON_PARSE
#define VIETER_CRON_PARSE
#include "vieter_cron.h"
vieter_cron_parse_error vieter_cron_expr_parse_range(uint64_t *out, char *s,
uint8_t min, uint8_t max);
vieter_cron_parse_error vieter_cron_expr_parse_part(uint64_t *out, char *s,
uint8_t min, uint8_t max);
#endif

23
src/heap/vieter_heap_tree.h
View File

@ -5,16 +5,16 @@
#include <stdlib.h>
typedef struct vieter_heap_node {
uint64_t key;
void *data;
struct vieter_heap_node *largest_order;
union {
// Roots point to next tree in the heap, other nodes point to their first
// neighbour.
struct vieter_heap_node *next_tree;
struct vieter_heap_node *next_largest_order;
} ptr;
uint8_t order;
uint64_t key;
void *data;
struct vieter_heap_node *largest_order;
union {
// Roots point to next tree in the heap, other nodes point to their first
// neighbour.
struct vieter_heap_node *next_tree;
struct vieter_heap_node *next_largest_order;
} ptr;
uint8_t order;
} vieter_heap_node;
/*
@ -36,8 +36,7 @@ void vieter_heap_tree_free(vieter_heap_node *root);
* Given the roots of the smallest trees in two heaps, merge them into a single
* large heap.
*/
vieter_heap_node *vieter_heap_tree_merge(vieter_heap_node *root_a,
vieter_heap_node *root_b);
vieter_heap_node *vieter_heap_tree_merge(vieter_heap_node *root_a, vieter_heap_node *root_b);
/*
* Given the roots of two trees of the same order, merge them into a heap of one

116
src/tree/vieter_tree.c
View File

@ -1,116 +0,0 @@
#include "vieter_tree_balancing.h"
#include "vieter_tree_internal.h"
vieter_tree *vieter_tree_init() { return calloc(1, sizeof(vieter_tree)); }
uint64_t vieter_tree_size(vieter_tree *tree) { return tree->size; }
vieter_tree_error vieter_tree_insert(vieter_tree *tree, uint64_t key,
void *data) {
if (tree->size == 0) {
tree->root = vieter_tree_node_init();
tree->root->key = key;
tree->root->data = data;
vieter_tree_node_set(tree->root, vieter_tree_node_black, true);
tree->size = 1;
return vieter_tree_ok;
}
vieter_tree_error res = vieter_tree_node_insert(tree->root, key, data);
if (res != vieter_tree_ok) {
return res;
}
tree->size++;
return vieter_tree_ok;
}
vieter_tree_error vieter_tree_search(void **out, vieter_tree *tree,
uint64_t key) {
if (tree->size == 0) {
return vieter_tree_not_present;
}
return vieter_tree_node_search(out, tree->root, key);
}
vieter_tree_error vieter_tree_remove(void **out, vieter_tree *tree,
uint64_t key) {
if (tree->size == 0) {
return vieter_tree_not_present;
}
vieter_tree_error res = vieter_tree_node_remove(out, &tree->root, key);
if (res != vieter_tree_ok) {
return res;
}
tree->size--;
return vieter_tree_ok;
}
void vieter_tree_free(vieter_tree *tree) {
if (tree->size == 0) {
goto end;
}
uint64_t capacity = 4;
uint64_t size = 1;
vieter_tree_node **stack = malloc(capacity * sizeof(vieter_tree_node *));
stack[0] = tree->root;
vieter_tree_node *node;
while (size > 0) {
node = stack[size - 1];
size--;
if (size + 2 > capacity) {
capacity *= 2;
stack = realloc(stack, capacity * sizeof(vieter_tree_node *));
}
if (node->children[0] != NULL) {
stack[size] = node->children[0];
size++;
}
if (node->children[1] != NULL) {
stack[size] = node->children[1];
size++;
}
vieter_tree_node_free(node);
}
free(stack);
end:
free(tree);
}
bool vieter_tree_validate(vieter_tree *tree) {
if (tree->size == 0) {
return true;
}
// DFS to get expected black nodes
uint64_t expected_black_nodes = 0;
vieter_tree_node *node = tree->root;
while (node != NULL) {
if (vieter_tree_node_get(node, vieter_tree_node_black)) {
expected_black_nodes++;
}
node = node->children[0];
}
return vieter_tree_node_get(tree->root, vieter_tree_node_black) &&
vieter_tree_node_validate(tree->root, 0, expected_black_nodes);
}

289
src/tree/vieter_tree_balancing.c
View File

@ -1,289 +0,0 @@
#include "vieter_tree_balancing.h"
#include <string.h>
bool vieter_tree_node_validate(vieter_tree_node *node,
uint64_t passed_black_nodes,
uint64_t expected_black_nodes) {
// Path to NULL children should contain the same amount of black nodes
if (node == NULL) {
return passed_black_nodes == expected_black_nodes;
}
if (vieter_tree_node_get(node, vieter_tree_node_black)) {
passed_black_nodes++;
}
// Either the node itself is black, or its children are both either NULL or
// black.
bool correctly_colored_children =
vieter_tree_node_get(node, vieter_tree_node_black) ||
((node->children[0] == NULL ||
vieter_tree_node_get(node->children[0], vieter_tree_node_black)) &&
(node->children[1] == NULL ||
vieter_tree_node_get(node->children[1], vieter_tree_node_black)));
bool right_child_flag_set =
node->parent == NULL ||
(vieter_tree_node_get(node, vieter_tree_node_right) ==
(node->parent->children[1] == node));
return correctly_colored_children && right_child_flag_set &&
vieter_tree_node_validate(node->children[0], passed_black_nodes,
expected_black_nodes) &&
vieter_tree_node_validate(node->children[1], passed_black_nodes,
expected_black_nodes);
}
/*
* This function should be rewritten to use tree rotations instead.
*/
vieter_tree_node *vieter_tree_node_balance(vieter_tree_node *node) {
vieter_tree_node *parent = node->parent;
vieter_tree_node *grand_parent = parent->parent;
vieter_tree_node *root = grand_parent;
vieter_tree_node *children[2];
vieter_tree_node *grand_children[4];
uint64_t key_root = root->key;
void *data_root = root->data;
if (vieter_tree_node_get(node, vieter_tree_node_right)) {
children[0] = parent;
children[1] = node;
if (vieter_tree_node_get(parent, vieter_tree_node_right)) {
root->key = parent->key;
root->data = parent->data;
parent->key = key_root;
parent->data = data_root;
grand_children[0] = grand_parent->children[0];
grand_children[1] = parent->children[0];
grand_children[2] = node->children[0];
grand_children[3] = node->children[1];
} else {
root->key = node->key;
root->data = node->data;
node->key = key_root;
node->data = data_root;
grand_children[0] = parent->children[0];
grand_children[1] = node->children[0];
grand_children[2] = node->children[1];
grand_children[3] = grand_parent->children[1];
}
} else {
children[0] = node;
children[1] = parent;
if (vieter_tree_node_get(parent, vieter_tree_node_right)) {
root->key = node->key;
root->data = node->data;
node->key = key_root;
node->data = data_root;
grand_children[0] = grand_parent->children[0];
grand_children[1] = node->children[0];
grand_children[2] = node->children[1];
grand_children[3] = parent->children[1];
} else {
root->key = parent->key;
root->data = parent->data;
parent->key = key_root;
parent->data = data_root;
grand_children[0] = node->children[0];
grand_children[1] = node->children[1];
grand_children[2] = parent->children[1];
grand_children[3] = grand_parent->children[1];
}
}
vieter_tree_node_set(
root, vieter_tree_node_right,
vieter_tree_node_get(grand_parent, vieter_tree_node_right));
vieter_tree_node_set(children[0], vieter_tree_node_black, true);
vieter_tree_node_set(children[1], vieter_tree_node_black, true);
vieter_tree_node_set(root, vieter_tree_node_black, false);
vieter_tree_node_set_children(children[0], grand_children);
vieter_tree_node_set_children(children[1], grand_children + 2);
vieter_tree_node_set_children(root, children);
return root;
}
void vieter_tree_node_balance_after_insert(vieter_tree_node *node) {
while (!vieter_tree_node_get(node, vieter_tree_node_black) &&
node->parent != NULL &&
!vieter_tree_node_get(node->parent, vieter_tree_node_black)) {
node = vieter_tree_node_balance(node);
}
// The root must always be black
if (node->parent == NULL) {
vieter_tree_node_set(node, vieter_tree_node_black, true);
}
}
vieter_tree_node *vieter_tree_node_rotate(vieter_tree_node *old_root,
bool dir) {
vieter_tree_node *new_root = old_root->children[1 - dir];
if (old_root->parent != NULL) {
vieter_tree_node_set_child(
old_root->parent, new_root,
vieter_tree_node_get(old_root, vieter_tree_node_right));
} else {
new_root->parent = NULL;
}
// Right rotation
if (dir) {
vieter_tree_node_set_child(old_root, new_root->children[1], false);
vieter_tree_node_set_child(new_root, old_root, true);
}
// Left rotation
else {
vieter_tree_node_set_child(old_root, new_root->children[0], true);
vieter_tree_node_set_child(new_root, old_root, false);
}
return new_root;
}
/*
* This function is currently implemented by very literally following the
* Wikipedia pseudocode. It's honestly not too bad, and I couldn't be bothered
* to properly research how to implement red-black removal (how is this so hard
* to find?)
*
* https://en.wikipedia.org/wiki/Red%E2%80%93black_tree#Removal_of_a_black_non-root_leaf
*/
vieter_tree_node *vieter_tree_node_remove_balanced(vieter_tree_node *node) {
vieter_tree_node *out;
if (node->parent == NULL) {
out = node->children[0] != NULL ? node->children[0] : node->children[1];
vieter_tree_node_free(node);
// This only happens when the root was the only element in the tree
if (out == NULL)
return out;
vieter_tree_node_set(out, vieter_tree_node_black, true);
out->parent = NULL;
return out;
}
// A red node can only have 0 or 2 children. The node we receive only has
// one child at most, so we know if it's red that it doesn't have any
// children. A black node that has a single (right) child can be replaced by
// this child, granted it becomes black as well. Either way, the node can be
// replaced by its right child (even if it's NULL).
if (!vieter_tree_node_get(node, vieter_tree_node_black) ||
node->children[1] != NULL) {
out = node->children[1];
vieter_tree_node_set_child(
node->parent, node->children[1],
vieter_tree_node_get(node, vieter_tree_node_right));
if (node->children[1] != NULL)
vieter_tree_node_set(node->children[1], vieter_tree_node_black, true);
vieter_tree_node_free(node);
return out;
}
// The complicated case is when we want to remove a black leaf
// https://en.wikipedia.org/wiki/Red%E2%80%93black_tree#Removal_of_a_black_non-root_leaf
out = node;
vieter_tree_node *parent = node->parent;
vieter_tree_node *sibling, *close_nephew, *distant_nephew;
bool dir = vieter_tree_node_get(node, vieter_tree_node_right);
parent->children[dir] = NULL;
vieter_tree_node_free(node);
goto start;
do {
dir = vieter_tree_node_get(node, vieter_tree_node_right);
start:
sibling = parent->children[1 - dir];
distant_nephew = sibling->children[1 - dir];
close_nephew = sibling->children[dir];
if (!vieter_tree_node_get(sibling, vieter_tree_node_black))
goto case3;
if (distant_nephew != NULL &&
!vieter_tree_node_get(distant_nephew, vieter_tree_node_black))
goto case6;
if (close_nephew != NULL &&
!vieter_tree_node_get(close_nephew, vieter_tree_node_black))
goto case5;
if (!vieter_tree_node_get(parent, vieter_tree_node_black))
goto case4;
// Case 2
vieter_tree_node_set(sibling, vieter_tree_node_black, false);
node = parent;
out = node;
} while ((parent = node->parent) != NULL);
// Case 1
return out;
case3:
out = vieter_tree_node_rotate(parent, dir);
vieter_tree_node_set(parent, vieter_tree_node_black, false);
vieter_tree_node_set(sibling, vieter_tree_node_black, true);
sibling = close_nephew;
distant_nephew = sibling->children[1 - dir];
if (distant_nephew != NULL &&
!vieter_tree_node_get(distant_nephew, vieter_tree_node_black))
goto case6;
close_nephew = sibling->children[dir];
if (close_nephew != NULL &&
!vieter_tree_node_get(close_nephew, vieter_tree_node_black))
goto case5;
case4:
vieter_tree_node_set(sibling, vieter_tree_node_black, false);
vieter_tree_node_set(parent, vieter_tree_node_black, true);
return out;
case5:
vieter_tree_node_rotate(sibling, 1 - dir);
vieter_tree_node_set(sibling, vieter_tree_node_black, false);
vieter_tree_node_set(close_nephew, vieter_tree_node_black, true);
distant_nephew = sibling;
sibling = close_nephew;
case6:
out = vieter_tree_node_rotate(parent, dir);
vieter_tree_node_set(sibling, vieter_tree_node_black,
vieter_tree_node_get(parent, vieter_tree_node_black));
vieter_tree_node_set(parent, vieter_tree_node_black, true);
vieter_tree_node_set(distant_nephew, vieter_tree_node_black, true);
return out;
}

46
src/tree/vieter_tree_balancing.h
View File

@ -1,46 +0,0 @@
#ifndef VIETER_TREE_BALANCING
#define VIETER_TREE_BALANCING
#include "vieter_tree_node.h"
/*
* Check whether the given tree is a valid red-black tree.
*
* @param node root of the (sub)tree
* @param passed_black_nodes how many black nodes the recursion has already seen
* at this point. This should be initialized as 0 for the topmost call.
* @param expected_black_nodes the correct amount of black nodes to expect when
* a NULL child is encountered.
* @return true if the tree is valid, false otherwise
*/
bool vieter_tree_node_validate(vieter_tree_node *node,
uint64_t passed_black_nodes,
uint64_t expected_black_nodes);
/*
* Balance a path of 3 nodes into a complete binary tree, with a red root and
* black children.
*/
vieter_tree_node *vieter_tree_node_balance(vieter_tree_node *node);
/*
* Ensure the tree remains a valid red-black tree after having inserting the
* node.
*/
void vieter_tree_node_balance_after_insert(vieter_tree_node *node);
/*
* Remove the given node, ensuring the tree remains a valid red-black tree.
*
* @param node node to remove. This should have at most a single child. If node
* isn't the root, this should be the right child, otherwise it can be either.
* @return root of the subtree that this function operated on. This can
* sometimes be the new root of the entire tree.
*/
vieter_tree_node *vieter_tree_node_remove_balanced(vieter_tree_node *node);
/*
* Perform a tree rotation of the subtree with the given root.
*/
vieter_tree_node *vieter_tree_node_rotate(vieter_tree_node *old_root, bool dir);
#endif

22
src/tree/vieter_tree_internal.h
View File

@ -1,22 +0,0 @@
#include "vieter_tree.h"
#include "vieter_tree_node.h"
#include <stdbool.h>
struct vieter_tree {
uint64_t size;
vieter_tree_node *root;
};
/*
* Inspect whether the tree is still a valid red-black-tree.
*
* @return true if valid, false otherwise.
*/
bool vieter_tree_validate(vieter_tree *tree);
struct vieter_tree_iterator {
vieter_tree_node *current_node;
bool started;
bool done;
};

49
src/tree/vieter_tree_iterator.c
View File

@ -1,49 +0,0 @@
#include "vieter_tree.h"
#include "vieter_tree_internal.h"
vieter_tree_iterator *vieter_tree_iterator_from(vieter_tree *tree) {
vieter_tree_iterator *iter = calloc(1, sizeof(vieter_tree_iterator));
// An empty tree's iterator will be done immediately
if (tree->size == 0) {
iter->started = true;
iter->done = true;
return iter;
}
iter->current_node = tree->root;
return iter;
}
vieter_tree_error vieter_tree_iterator_next(void **out,
vieter_tree_iterator *iter) {
if (iter->done) {
return vieter_tree_iterator_done;
}
if (!iter->started) {
while (iter->current_node->children[0] != NULL) {
iter->current_node = iter->current_node->children[0];
}
iter->started = true;
}
*out = iter->current_node->data;
iter->current_node = vieter_tree_node_next(iter->current_node);
if (iter->current_node == NULL) {
iter->done = true;
}
return vieter_tree_ok;
}
void vieter_tree_iterator_free(vieter_tree_iterator **ptp) {
free(*ptp);
*ptp = NULL;
}

171
src/tree/vieter_tree_node.c
View File

@ -1,171 +0,0 @@
#include "vieter_tree_node.h"
#include "vieter_tree_balancing.h"
#include <string.h>
vieter_tree_node *vieter_tree_node_init() {
return calloc(1, sizeof(vieter_tree_node));
}
void vieter_tree_node_free(vieter_tree_node *node) { free(node); }
void vieter_tree_node_add_child(vieter_tree_node *parent, uint64_t key,
vieter_tree_node *child) {
if (parent == NULL) {
return;
}
bool side = key > parent->key;
parent->children[side] = child;
if (child != NULL) {
child->parent = parent;
vieter_tree_node_set(child, vieter_tree_node_right, side);
}
}
void vieter_tree_node_set_children(vieter_tree_node *parent,
vieter_tree_node **children) {
memcpy(parent->children, children, 2 * sizeof(vieter_tree_node *));
for (uint8_t i = 0; i < 2; i++) {
if (parent->children[i] != NULL) {
parent->children[i]->parent = parent;
vieter_tree_node_set(parent->children[i], vieter_tree_node_right, i);
}
}
}
void vieter_tree_node_set_child(vieter_tree_node *parent,
vieter_tree_node *child, bool right) {
parent->children[right] = child;
if (child != NULL) {
child->parent = parent;
vieter_tree_node_set(child, vieter_tree_node_right, right);
}
}
vieter_tree_error vieter_tree_node_insert(vieter_tree_node *root, uint64_t key,
void *data) {
vieter_tree_node *node = root;
vieter_tree_node *parent = root;
while (node != NULL) {
if (node->key == key) {
return vieter_tree_already_present;
}
parent = node;
node = node->children[key > parent->key];
}
vieter_tree_node *new_node = vieter_tree_node_init();
new_node->key = key;
new_node->data = data;
vieter_tree_node_add_child(parent, key, new_node);
vieter_tree_node_balance_after_insert(new_node);
return vieter_tree_ok;
}
vieter_tree_error vieter_tree_node_search_node(vieter_tree_node **out,
vieter_tree_node *root,
uint64_t key) {
vieter_tree_node *node = root;
while (node != NULL) {
if (node->key == key) {
*out = node;
return vieter_tree_ok;
}
node = node->children[key > node->key];
}
return vieter_tree_not_present;
}
vieter_tree_error vieter_tree_node_search(void **out, vieter_tree_node *root,
uint64_t key) {
vieter_tree_node *target;
vieter_tree_error res = vieter_tree_node_search_node(&target, root, key);
if (res != vieter_tree_ok) {
return res;
}
*out = target->data;
return vieter_tree_ok;
}
vieter_tree_error
vieter_tree_node_remove(void **out, vieter_tree_node **root_ptr, uint64_t key) {
vieter_tree_node *target;
vieter_tree_error res = vieter_tree_node_search_node(&target, *root_ptr, key);
if (res != vieter_tree_ok) {
return res;
}
*out = target->data;
vieter_tree_node *possible_new_root;
if (target->children[0] != NULL && target->children[1] != NULL) {
vieter_tree_node *replacement = target->children[1];
while (replacement->children[0] != NULL) {
replacement = replacement->children[0];
}
target->key = replacement->key;
target->data = replacement->data;
possible_new_root = vieter_tree_node_remove_balanced(replacement);
} else {
possible_new_root = vieter_tree_node_remove_balanced(target);
}
if (possible_new_root == NULL) {
*root_ptr = NULL;
} else if (possible_new_root->parent == NULL) {
*root_ptr = possible_new_root;
}
return vieter_tree_ok;
}
void vieter_tree_node_set(vieter_tree_node *node, vieter_tree_node_flag flag,
bool set) {
if (set) {
node->flags |= flag;
} else {
node->flags &= ~flag;
}
}
bool vieter_tree_node_get(vieter_tree_node *node, vieter_tree_node_flag flag) {
return (node->flags & flag) != 0;
}
vieter_tree_node *vieter_tree_node_next(vieter_tree_node *node) {
if (node->children[1] != NULL) {
node = node->children[1];
while (node->children[0] != NULL) {
node = node->children[0];
}
return node;
}
while (node->parent != NULL &&
vieter_tree_node_get(node, vieter_tree_node_right)) {
node = node->parent;
}
return node->parent;
}

94
src/tree/vieter_tree_node.h
View File

@ -1,94 +0,0 @@
#ifndef VIETER_TREE_NODE
#define VIETER_TREE_NODE
#include "vieter_tree.h"
#include <stdbool.h>
#include <stdint.h>
typedef enum vieter_tree_node_flag {
vieter_tree_node_black = ((uint8_t)1) << 0,
// This flag is used to index the children array. If this flag isn't set,
// it'll evaluate to false, or index 0 in the children array.
vieter_tree_node_right = ((uint8_t)1) << 1
} vieter_tree_node_flag;
typedef struct vieter_tree_node {
uint64_t key;
void *data;
struct vieter_tree_node *parent;
struct vieter_tree_node *children[2];
uint8_t flags;
} vieter_tree_node;
/*
* Allocate a new node.
*/
vieter_tree_node *vieter_tree_node_init();
/*
* Free an allocated node.
*/
void vieter_tree_node_free(vieter_tree_node *node);
/*
* Insert a new key into the given tree.
*/
vieter_tree_error vieter_tree_node_insert(vieter_tree_node *root, uint64_t key,
void *data);
/*
* Return the node representing the requested value.
*/
vieter_tree_error vieter_tree_node_search_node(vieter_tree_node **out,
vieter_tree_node *root,
uint64_t key);
/*
* Search for the data represented by the given key.
*/
vieter_tree_error vieter_tree_node_search(void **out, vieter_tree_node *root,
uint64_t key);
/*
* Remove the data associated with the given key.
*/
vieter_tree_error
vieter_tree_node_remove(void **out, vieter_tree_node **root_ptr, uint64_t key);
/*
* Set a node's bit flag to the given value.
*/
void vieter_tree_node_set(vieter_tree_node *node, vieter_tree_node_flag flag,
bool value);
/*
* Get whether a node's bit flag is set.
*/
bool vieter_tree_node_get(vieter_tree_node *node, vieter_tree_node_flag flag);
/*
* Add a new child to the parent, replacing either its left or right child,
* depending on the key values.
*/
void vieter_tree_node_add_child(vieter_tree_node *parent, uint64_t key,
vieter_tree_node *child);
/*
* Replace a node's children array.
*/
void vieter_tree_node_set_children(vieter_tree_node *parent,
vieter_tree_node **children);
/*
* Set a node's left or right child to the given node.
*/
void vieter_tree_node_set_child(vieter_tree_node *parent,
vieter_tree_node *child, bool right);
/*
* Return the in-order successor of the given node, or NULL if it's the last
* node in the tree.
*/
vieter_tree_node *vieter_tree_node_next(vieter_tree_node *node);
#endif

4
test/cron/test_parse.c
View File

@ -1,7 +1,7 @@
#include "acutest.h"
#include "vieter_cron.h"
void test_illegal_expressions() {
void test_not_allowed() {
char *expressions[] = {
"4 *-7",
"4 *-7/4",
@ -33,6 +33,6 @@ void test_illegal_expressions() {
}
TEST_LIST = {
{"cron illegal expressions", test_illegal_expressions},
{"not_allowed", test_not_allowed},
{NULL, NULL}
};

43
test/cron/test_parse_part.c
View File

@ -1,43 +0,0 @@
#include "acutest.h"
#include "vieter_cron_parse.h"
struct parse_test {
char *part;
uint8_t min;
uint8_t max;
};
void test_illegal_parts() {
struct parse_test parts[] = {
{ "*-7", 0, 23 },
{ "*-7/4", 0, 23 },
{ "7/*", 0, 23 },
{ "/5", 0, 23 },
{ "4~6", 0, 23 },
{ "5/2-5", 0, 23 },
{ "1/2/3", 0, 23 },
{ "*5", 0, 59 },
{ "x", 0, 59 },
{ NULL, 0, 0 }
};
int i = 0;
uint64_t out;
char *s;
while (parts[i].part != NULL) {
// Function modifies string in-place
s = strdup(parts[i].part);
TEST_CHECK_(vieter_cron_expr_parse_part(&out, s, parts[i].min, parts[i].max) != vieter_cron_parse_ok, "%s (%i - %i)", parts[i].part, parts[i].min, parts[i].max);
free(s);
i++;
}
}
TEST_LIST = {
{"cron illegal parts", test_illegal_parts},
{NULL, NULL}
};

10
test/heap/test_heap.c
View File

@ -178,10 +178,10 @@ void test_pop_random() {
}
TEST_LIST = {
{"heap init", test_init},
{"heap insert", test_insert},
{"heap insert random", test_insert_random},
{"heap pop", test_pop},
{"heap pop random", test_pop_random},
{"init", test_init},
{"insert", test_insert},
{"insert random", test_insert_random},
{"pop", test_pop},
{"pop random", test_pop_random},
{NULL, NULL}
};

2
test/heap/test_merge.c
View File

@ -23,6 +23,6 @@ void test_merge_same_order() {
}
TEST_LIST = {
{"heap merge same order", test_merge_same_order},
{"merge same order", test_merge_same_order},
{NULL, NULL}
};

71
test/tree/test_balancing.c
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@ -1,71 +0,0 @@
#include "acutest.h"
#include "vieter_tree_internal.h"
#include "vieter_tree_node.h"
#include "vieter_tree_balancing.h"
// This uses the examples from wikipedia
// https://en.wikipedia.org/wiki/Tree_rotation
void test_rotate_right() {
vieter_tree_node *a = vieter_tree_node_init();
vieter_tree_node *b = vieter_tree_node_init();
vieter_tree_node *p = vieter_tree_node_init();
vieter_tree_node_set_child(p, a, false);
vieter_tree_node_set_child(p, b, true);
vieter_tree_node *c = vieter_tree_node_init();
vieter_tree_node *q = vieter_tree_node_init();
vieter_tree_node_set_child(q, p, false);
vieter_tree_node_set_child(q, c, true);
vieter_tree_node *new_root = vieter_tree_node_rotate(q, true);
TEST_CHECK(new_root == p);
TEST_CHECK(new_root->children[0] == a);
TEST_CHECK(new_root->children[1] == q);
TEST_CHECK(new_root->children[1]->children[0] == b);
TEST_CHECK(new_root->children[1]->children[1] == c);
vieter_tree_node_free(a);
vieter_tree_node_free(b);
vieter_tree_node_free(p);
vieter_tree_node_free(c);
vieter_tree_node_free(q);
}
void test_rotate_left() {
vieter_tree_node *b = vieter_tree_node_init();
vieter_tree_node *c = vieter_tree_node_init();
vieter_tree_node *q = vieter_tree_node_init();
vieter_tree_node_set_child(q, b, false);
vieter_tree_node_set_child(q, c, true);
vieter_tree_node *a = vieter_tree_node_init();
vieter_tree_node *p = vieter_tree_node_init();
vieter_tree_node_set_child(p, a, false);
vieter_tree_node_set_child(p, q, true);
vieter_tree_node *new_root = vieter_tree_node_rotate(p, false);
TEST_CHECK(new_root == q);
TEST_CHECK(new_root->children[0] == p);
TEST_CHECK(new_root->children[1] == c);
TEST_CHECK(new_root->children[0]->children[0] == a);
TEST_CHECK(new_root->children[0]->children[1] == b);
vieter_tree_node_free(a);
vieter_tree_node_free(b);
vieter_tree_node_free(p);
vieter_tree_node_free(c);
vieter_tree_node_free(q);
}
TEST_LIST = {
{"tree rotate right", test_rotate_right},
{"tree rotate left", test_rotate_left},
{NULL, NULL}
};

72
test/tree/test_tree.c
View File

@ -1,72 +0,0 @@
#include "acutest.h"
#include "vieter_tree_internal.h"
#define TEST_SIZE(tree, size) \
TEST_CHECK(vieter_tree_size(tree) == size); \
TEST_MSG("Size: %zu", vieter_tree_size(tree))
void test_init() {
vieter_tree *tree = vieter_tree_init();
TEST_CHECK(tree != NULL);
TEST_SIZE(tree, 0);
vieter_tree_free(tree);
}
void test_insert() {
vieter_tree *tree = vieter_tree_init();
for (uint64_t i = 0; i < 250; i++) {
TEST_CHECK(vieter_tree_insert(tree, i, (void *)i) == vieter_tree_ok);
TEST_SIZE(tree, i + 1);
TEST_CHECK(vieter_tree_validate(tree));
}
vieter_tree_iterator *iter = vieter_tree_iterator_from(tree);
void *out = NULL;
for (uint64_t i = 0; i < 250; i++) {
TEST_CHECK(vieter_tree_search(&out, tree, i) == vieter_tree_ok);
TEST_CHECK(out == (void *)i);
TEST_CHECK(vieter_tree_insert(tree, i, NULL) == vieter_tree_already_present);
TEST_CHECK(vieter_tree_search(&out, tree, i) == vieter_tree_ok);
out = NULL;
TEST_CHECK(vieter_tree_iterator_next(&out, iter) == vieter_tree_ok);
TEST_CHECK(out == (void *)i);
}
TEST_CHECK(vieter_tree_iterator_next(&out, iter) == vieter_tree_iterator_done);
vieter_tree_iterator_free(&iter);
vieter_tree_free(tree);
}
void test_remove() {
vieter_tree *tree = vieter_tree_init();
for (uint64_t i = 0; i < 250; i++) {
TEST_CHECK(vieter_tree_insert(tree, i, NULL) == vieter_tree_ok);
TEST_CHECK(vieter_tree_validate(tree));
}
void *out;
for (uint64_t i = 0; i < 250; i++) {
TEST_CHECK(vieter_tree_search(&out, tree, i) == vieter_tree_ok);
TEST_CHECK(vieter_tree_remove(&out, tree, i) == vieter_tree_ok);
TEST_CHECK(vieter_tree_validate(tree));
TEST_CHECK(vieter_tree_search(&out, tree, i) == vieter_tree_not_present);
TEST_SIZE(tree, 250 - i - 1);
}
vieter_tree_free(tree);
}
TEST_LIST = {
{"tree init", test_init},
{"tree insert", test_insert},
{"tree remove", test_remove},
{NULL, NULL}
};

59
test/tree/test_tree_random.c
View File

@ -1,59 +0,0 @@
#include "acutest.h"
#include "vieter_tree_internal.h"
#define TEST_SIZE(tree, size) \
TEST_CHECK(vieter_tree_size(tree) == size); \
TEST_MSG("Size: %zu", vieter_tree_size(tree))
int uint64_t_compare(const void *a, const void *b) {
if ((*(uint64_t *)a) < (*(uint64_t *)b)) {
return -1;
} else if ((*(uint64_t *)a) > (*(uint64_t *)b)) {
return 1;
} else {
return 0;
}
}
void test_insert_random() {
const uint64_t n = 1000;
srand(0);
vieter_tree *tree = vieter_tree_init();
uint64_t *numbers = malloc(n * sizeof(uint64_t));
uint64_t num;
void *out = NULL;
for (uint64_t i = 0; i < n; i++) {
num = rand();
vieter_tree_insert(tree, num, (void *)num);
TEST_SIZE(tree, i + 1);
TEST_CHECK(vieter_tree_validate(tree));
TEST_CHECK(vieter_tree_search(&out, tree, num) == vieter_tree_ok);
TEST_CHECK(out == (void *)num);
out = NULL;
numbers[i] = num;
}
qsort(numbers, n, sizeof(uint64_t), uint64_t_compare);
vieter_tree_iterator *iter = vieter_tree_iterator_from(tree);
out = NULL;
for (uint64_t i = 0; i < n; i++) {
TEST_CHECK(vieter_tree_iterator_next(&out, iter) == vieter_tree_ok);
TEST_CHECK(out == (void *)numbers[i]);
}
free(numbers);
vieter_tree_iterator_free(&iter);
vieter_tree_free(tree);
}
TEST_LIST = {
{"tree insert random", test_insert_random},
{NULL, NULL}
};