106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
#include "node.h"
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#include <stdlib.h>
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#include <stdio.h>
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NOD_Node* NOD_CreateNode(char* name){
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NOD_Node* node = malloc(sizeof(NOD_Node));
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if(node != NULL){
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node->name = name;
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node->parent = NULL;
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node->childv = NULL;
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node->childc = 0;
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}
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return node;
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}
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void NOD_DestroyNode(NOD_Node* node){
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if(node != NULL){
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free(node);
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}
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}
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void NOD_NodeAddChild(NOD_Node* parent, NOD_Node* child){
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if(parent != NULL && child != NULL){
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/** Prevent recursion */
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if(parent == child){
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fprintf(stderr, "NOD_Warning: A node cannot be added to itself.\n");
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return;
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}
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NOD_Node* tmp_parent = parent->parent;
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while(tmp_parent != NULL){
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if(tmp_parent == child){
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fprintf(stderr, "NOD_Warning: Can't add a parent of a node as its child.\n");
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return;
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}
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tmp_parent = tmp_parent->parent;
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}
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/** Check if child already in vector */
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for(int i = 0; i < parent->childc; i++){
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if(parent->childv[i] == child){
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fprintf(stderr, "NOD_Warning: Tried to add a child already in the vector.\n");
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return;
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}
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}
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/** Create child vector if it hasn't been used */
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if(parent->childc == 0 || parent->childv == NULL){
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parent->childv = malloc(sizeof(child));
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if(parent->childv != NULL){
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parent->childv[0] = child;
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parent->childc = 1;
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child->parent = parent;
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}
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else{
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fprintf(stderr,
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"NOD_Error: Failed to allocate space for child vector \"%s\"\n",
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parent->name);
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}
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}
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/** Realloc if it already exists */
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/** I don't test if chilv is null because it
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has already been tested */
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else if(parent->childc > 0){
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parent->childv = realloc(parent->childv,
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sizeof(child) * (parent->childc+1));
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if(parent->childv != NULL){
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parent->childv[parent->childc] = child;
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parent->childc++;
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child->parent = parent;
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}
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else{
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fprintf(stderr,
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"NOD_Error: Failed to reallocate space for child vector \"%s\"\n",
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parent->name);
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}
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}
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}
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}
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void NOD_NodeRemoveChild(NOD_Node* parent, NOD_Node* child){
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if(parent != NULL && child != NULL){
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if(parent->childc < 1 || parent->childv == NULL){
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fprintf(stderr,
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"NOD_Error: Cannot remove child \"%s\". Node \"%s\" has no children.\n",
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child->name,
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parent->name);
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}
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}
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}
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void NOD_PrintNodeTree(NOD_Node* node){
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if(node != NULL){
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printf("%s", node->name);
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}
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}
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