From fb8672e5a1b26472423c775ccc5a3336facd38e1 Mon Sep 17 00:00:00 2001
From: Niko Rost <rostni100585@th-nuernberg.de>
Date: Mon, 17 Nov 2025 11:40:47 +0100
Subject: [PATCH] Finished StringCheck Method but did not test yet

---
 imageInput.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/imageInput.c b/imageInput.c
index bb30de1..0f4dc8f 100644
--- a/imageInput.c
+++ b/imageInput.c
@@ -8,6 +8,27 @@
 
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
 
+int checkString (FILE *file){ //Checks if String at the start of File equals expected Format (0 for wrong 1 for right)
+	if (file == NULL){ //returns 0 for empty file
+		return 0;
+		}
+	char expectedString[] = FILE_HEADER_STRING;
+	char actualString[BUFFER_SIZE];
+
+	rewind(file);
+	size_t bytesRead = fread(actualString, 1,27 , file); //Stores Bytes of start of File to actualString
+	if (bytesRead != 27){
+	return 0;} //Returns 0 if File is to short
+	actualString[27] = '\0';
+
+	if (strcmp(actualString, expectedString) != 0){
+	return 0;
+}
+	else{
+	return 1;
+}
+}
+
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {