Matrix add broadcasting support

matrix.c

@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "matrix.h"
+#include <stdbool.h>
 
 // TODO Matrix-Funktionen implementieren
 
@@ -129,6 +130,8 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 }
 */
 
+//Currently working version
+/*
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
     //check if the matrices are able to be added (same size)
@@ -156,6 +159,57 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
     }
     return outputMatrix;
 
+}
+*/
+
+
+Matrix add(const Matrix matrix1, const Matrix matrix2)
+{
+
+    bool doBroadcast = false;
+    Matrix larger, smaller;
+    
+    if(matrix1.rows == matrix2.rows && matrix1.cols == matrix2.cols){
+        larger = matrix1;
+        smaller = matrix2;
+    }
+    else if (matrix1.rows == matrix2.rows && matrix2.cols == 1)
+    {
+        larger = matrix1;
+        smaller = matrix2;
+        doBroadcast = true;
+    }
+    else if (matrix1.rows == matrix2.rows && matrix1.cols == 1)
+    {
+        larger = matrix2;
+        smaller = matrix1;
+        doBroadcast = true;
+    }
+    else{
+        Matrix m = {NULL, 0, 0};
+        return m;
+    }
+
+    Matrix outputMatrix = createMatrix(larger.rows, larger.cols);
+    if(doBroadcast){
+        for(int i = 0; i < outputMatrix.rows; i++){
+            MatrixType broadcastValue = smaller.buffer[i];
+            for(int j = 0; j < outputMatrix.cols; j++){
+                outputMatrix.buffer[i * outputMatrix.cols + j] = larger.buffer[i * larger.cols + j] + broadcastValue; 
+            }
+        }
+    } else{
+        for (int i = 0; i < matrix1.rows;i++) {
+            for (int j = 0; j < matrix1.cols; j++) {
+                // how this should work in normal Matrix version:
+                // outputmatrix.buffer[i][j] = matrix1.buffer[i][j] + matrix2.buffer[i][j];
+                outputMatrix.buffer[i * outputMatrix.cols + j] = matrix1.buffer[i * matrix1.cols + j] + matrix2.buffer[i * matrix2.cols + j];
+            }
+        }
+    }
+    return outputMatrix;    
+    
+
 }
 
 /*