diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/editor.xml b/.idea/editor.xml
new file mode 100644
index 0000000..226ca24
--- /dev/null
+++ b/.idea/editor.xml
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\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..bedf918
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,13 @@
+
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\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
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\ No newline at end of file
diff --git a/bintree.c b/bintree.c
index 5cf82a9..a16bf2d 100644
--- a/bintree.c
+++ b/bintree.c
@@ -12,7 +12,52 @@
// if isDuplicate is NULL, otherwise ignores duplicates and sets isDuplicate to 1 (or to 0 if a new entry is added).
TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFctType compareFct, int *isDuplicate)
{
+ if(data!= NULL && dataSize > 0)
+ {
+ if(root == NULL) //Abbruchbedingung: Keine Wurzel vorhanden, deshalb fügen wir hier einen neuen Knote ein
+ {
+ TreeNode *newNode = (TreeNode *)malloc(sizeof(TreeNode));
+ if(newNode == NULL)
+ {
+ return NULL;
+ }
+ newNode->data = malloc(dataSize);
+ if(newNode->data == NULL)
+ {
+ free(newNode);
+ return NULL;
+ }
+ memcpy(newNode->data, data, dataSize);
+ newNode->left = NULL;
+ newNode->right = NULL;
+ if(isDuplicate!= NULL)
+ {
+ *isDuplicate = 1;
+ }
+
+ return newNode;
+ }
+ int cmp = compareFct(root->data, &data);
+ if(cmp > 0)
+ {
+ root->left = addToTree(root->left, &data, dataSize, compareFct, &isDuplicate);
+ }
+ else if(cmp < 0){
+ root->right = addToTree(root->right, &data, dataSize, compareFct, &isDuplicate);
+ }
+ else
+ {
+ if (isDuplicate) {
+ *isDuplicate = 1;
+ }
+ else {
+ // isDuplicate == NULL → trotzdem ein Duplikat einfügen (z.B. rechts)
+ root->right = addToTree(root->right, data, dataSize, compareFct, NULL);
+ }
+ }
+ }
+ return NULL;
}
// Iterates over the tree given by root. Follows the usage of strtok. If tree is NULL, the next entry of the last tree given is returned in ordering direction.