asdf

.gitignore

@@ -1,4 +1,5 @@
 mnist
 runTests
+runMatrixTests
 *.o
 *.exe

matrix.c

@@ -4,22 +4,24 @@
 
 // TODO Matrix-Funktionen implementieren
 
+/*
+Alte Funktion
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
     Matrix m;
-    m.xElement = rows;
+    m.rows = rows;
-    m.yElement = cols;
+    m.cols = cols;
     m.data = NULL;
 
     if(rows == 0 || cols == 0){
-        m.xElement = m.yElement = 0;
+        m.rows = m.cols = 0;
         return m;
     }
 
     m.data = malloc(rows * sizeof *m.data);
     
     if(!m.data){
-        m.xElement = m.yElement = 0;
+        m.rows = m.cols = 0;
         return m;
     }
     for(unsigned int i = 0; i < rows; i++){
@@ -31,13 +33,42 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
         }
         free(m.data);
         m.data = NULL;
-        m.xElement = m.yElement = 0;
+        m.rows = m.cols = 0;
         return m;
       }
         
     }
     return m;
 }
+*/
+
+Matrix createMatrix(size_t rows, size_t cols)
+{
+    Matrix m;
+    m.rows = rows;
+    m.cols = cols;
+    m.buffer = NULL;
+
+    if(rows == 0 || cols == 0){
+        m.rows = m.cols = 0;
+        return m;
+    }
+
+    // Single allocation for entire matrix
+    m.buffer = malloc(rows * cols * sizeof(MatrixType));
+    
+    if(!m.buffer){
+        m.rows = m.cols = 0;
+        return m;
+    }
+    
+    // Initialize (optional)
+    for(unsigned int i = 0; i < rows * cols; i++){
+        m.buffer[i] = UNDEFINED_MATRIX_VALUE;
+    }
+    
+    return m;
+}
 
 void clearMatrix(Matrix *matrix)
 {

matrix.h

@@ -7,13 +7,13 @@ typedef float MatrixType;
 // TODO Matrixtyp definieren
 
 typedef struct Matrix {
-    unsigned int xElement;
+    size_t rows;
-    unsigned int yElement;
+    size_t cols;
-    double ** data;
+    MatrixType *buffer;
 } Matrix;
 
 
-Matrix createMatrix(unsigned int rows, unsigned int cols);
+Matrix createMatrix(size_t rows, size_t cols);
 void clearMatrix(Matrix *matrix);
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx);
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx);