Trees/Tree.cpp at main · KuchinaMA/Trees · GitHub

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#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <strings.h>

#include "Tree.h"

Node* node_ctor(int data, Node* left, Node* right) {

    Node* node = (Node*)calloc(1, sizeof(Node));

    node->data = data;
    node->left = left;
    node->right = right;

    return node;
}

int node_dtor(Node* node) {

    if (node->left != 0 && node->right != 0) {
        node_dtor(node->left);
        node_dtor(node->right);
    }

    node->left = 0;
    node->right = 0;
    node->data = TREE_POISON;

    free(node);

    return 0;
}

void print_node_pre(Node* node, FILE* output) {

    if (node == 0) {
        fprintf(output, "nil ");
        return;
    }
    fprintf(output, "( ");
    fprintf(output, "%d ", node->data);
    print_node_pre(node->left, output);
    print_node_pre(node->right, output);
    fprintf(output, ") ");
}

void print_node_post(Node* node, FILE* output) {

    if (node == 0) {
        fprintf(output, "nil ");
        return;
    }
    fprintf(output, "( ");
    print_node_post(node->left, output);
    print_node_post(node->right, output);
    fprintf(output, "%d ", node->data);
    fprintf(output, ") ");
}

void print_node_in(Node* node, FILE* output) {

    if (node == 0) {
        fprintf(output, "nil ");
        return;
    }
    fprintf(output, "( ");
    print_node_in(node->left, output);
    fprintf(output, "%d ", node->data);
    print_node_in(node->right, output);
    fprintf(output, ") ");
}


Tree* tree_ctor(Node* root, size_t size) {

    assert(root);

    Tree* tree = (Tree*)calloc(1, sizeof(Tree));

    tree->root = root;
    tree->size = size;

    return tree;
}

int tree_dtor(Tree* tree) {

    node_dtor(tree->root);
    tree->root = 0;
    tree->size = 0;

    free(tree);

    return 0;
}

int add_node(Tree* tree, Node* node, int data) {

    if (data <= node->data) {

        if (node->left != 0)

            add_node(tree, node->left, data);

        else {

            Node* new_node = node_ctor(data, 0, 0);
            node->left = new_node;
        }
    }

    else {

        if (node->right != 0)

            add_node(tree, node->right, data);

        else {

            Node* new_node = node_ctor(data, 0, 0);
            node->right = new_node;
        }
    }

    return 0;
}


Node* read_node(FILE* file) {

    int number = 0;
    char current[MAX_LINE_LEN] = "";

    Node* node = (Node*)calloc(1, sizeof(Node));

    fscanf(file, "%d", &number);
    printf("%d\n", number);
    node->data = number;

    fscanf(file, "%s", current);
    if (strcmp("(", current) == 0) {

        printf("open %s\n", current);
        node->left = read_node(file);
    }

    else if (strcmp("nil", current) == 0) {

        printf("nils %s\n", current);
        node->left = 0;
    }

    else
        printf("Syntax error!\n");


    fscanf(file, "%s", current);
    if (strcmp("(", current) == 0) {

        printf("open %s\n", current);
        node->right = read_node(file);
    }

    else if (strcmp("nil", current) == 0) {

        printf("nil %s\n", current);
        node->right = 0;
    }

    else
        printf("Syntax error!\n");


    fscanf(file, "%s", current); //çàêðûâàþùàÿ ñêîáêà
    printf("data: %d\n", node->data);

    return node;
}

Node* read_data(FILE* file) {

    char current[MAX_LINE_LEN] = "";

    fscanf(file, "%s", current); //îòêðûâàþùàÿ ñêîáêà
    printf("open %s\n", current);

    Node* new_node = read_node(file);

    return new_node;
}