Bug-Fix create matrix

.gitignore

@@ -1,61 +1,4 @@
-# ---> C
-# Prerequisites
-*.d
-
-# Object files
+mnist
+runTests
 *.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-Startcode/mnist
-Startcode/runTests
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
-
-# IDE folders
-.vscode/
-.idea/
-
-# macOS
-.DS_Store
+*.exe

Startcode/matrix.c

@@ -1,35 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-#include "matrix.h"
-
-// TODO Matrix-Funktionen implementieren
-
-Matrix createMatrix(unsigned int rows, unsigned int 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)
-{
-    
-}
-
-Matrix add(const Matrix matrix1, const Matrix matrix2)
-{
-    
-}
-
-Matrix multiply(const Matrix matrix1, const Matrix matrix2)
-{
-    
-}

imageInputTests.c

@@ -54,7 +54,7 @@ void test_readImagesReturnsCorrectImageWidth(void)
     GrayScaleImageSeries *series = NULL;
     const unsigned short expectedWidth = 10;
     const char *path = "testFile.info2";
-    prepareImageFile(path, expectedWidth, 8, 2, 1);
+    prepareImageFile(path, 8, expectedWidth, 2, 1);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_NOT_NULL(series->images);
@@ -70,7 +70,7 @@ void test_readImagesReturnsCorrectImageHeight(void)
     GrayScaleImageSeries *series = NULL;
     const unsigned short expectedHeight = 10;
     const char *path = "testFile.info2";
-    prepareImageFile(path, 8, expectedHeight, 2, 1);
+    prepareImageFile(path, expectedHeight, 8, 2, 1);
     series = readImages(path);
     TEST_ASSERT_NOT_NULL(series);
     TEST_ASSERT_NOT_NULL(series->images);

matrix.c

@@ -0,0 +1,141 @@
+#include <stdlib.h>
+#include <string.h>
+#include "matrix.h"
+#include <stdio.h>
+
+// TODO Matrix-Funktionen implementieren
+
+Matrix createMatrix(unsigned int rows, unsigned int cols)
+{
+    Matrix matrix;
+
+    if(rows == 0 || cols == 0)
+    {
+        matrix.rows = 0;
+        matrix.cols = 0;
+        matrix.data = NULL;
+        return matrix;
+    }
+
+
+    matrix.rows = rows;
+    matrix.cols = cols;
+
+    matrix.data = (MatrixType *)malloc(rows * cols * sizeof(MatrixType));
+
+    if (matrix.data == NULL)
+    {
+
+        matrix.rows = 0;
+        matrix.cols = 0;
+
+        return matrix;
+    }
+
+    for (int i = 0; i < rows; i++)
+    {
+        for (int j = 0; j < cols; j++)
+        {
+            matrix.data[i * matrix.cols + j] = UNDEFINED_MATRIX_VALUE;
+        }
+    }
+    return matrix;
+}
+
+void clearMatrix(Matrix *matrix)
+{
+    if (matrix->data != NULL)
+    {
+        free(matrix->data);
+        matrix->data = NULL;
+    }
+
+    matrix->rows = 0;
+    matrix->cols = 0;
+}
+
+void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
+{
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols)
+    {
+        fprintf(stderr, "Fehler: Ungültiger Index (%u, %u) bei Matrixgröße %u x %u\n", rowIdx, colIdx, matrix.rows, matrix.cols);
+        return; // abbruch falls fehler
+    }
+
+    matrix.data[rowIdx * matrix.cols + colIdx] = value;
+}
+
+MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
+{
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols)
+    {
+        fprintf(stderr, "Fehler: Ungültiger Index (%u, %u) bei Matrixgröße %u x %u\n", rowIdx, colIdx, matrix.rows, matrix.cols);
+        return UNDEFINED_MATRIX_VALUE;
+    }
+
+    return matrix.data[rowIdx * matrix.cols + colIdx];
+}
+
+Matrix add(const Matrix matrix1, const Matrix matrix2)
+{
+    if (matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols)
+    {
+        fprintf(stderr, "Fehler: Matrizen haben unterschiedliche Größen (%u x %u) und (%u x %u)\n",
+                matrix1.rows, matrix1.cols, matrix2.rows, matrix2.cols);
+
+        Matrix empty = {0, 0, NULL};
+        return empty;
+    }
+
+    Matrix result = createMatrix(matrix1.rows, matrix1.cols);
+
+    if (result.data == NULL)
+    {
+        fprintf(stderr, "Fehler: Speicher konnte nicht reserviert werden!\n");
+        return result;
+    }
+
+    for (int i = 0; i < matrix1.rows; i++)
+    {
+        for (int j = 0; j < matrix1.cols; j++)
+        {
+            result.data[i * result.cols + j] = matrix1.data[i * matrix1.cols + j] + matrix2.data[i * matrix2.cols + j];
+        }
+    }
+    return result;
+}
+
+Matrix multiply(const Matrix matrix1, const Matrix matrix2)
+{
+    if (matrix1.cols != matrix2.rows)
+    {
+        fprintf(stderr, "Fehler: Matrizen der Dimension (%u x %u) und (%u x %u) koennen nicht multipliziert werden\n",
+                matrix1.rows, matrix1.cols, matrix2.rows, matrix2.cols);
+
+        Matrix empty = {0, 0, NULL};
+        return empty;
+    }
+
+    Matrix result = createMatrix(matrix1.rows, matrix2.cols);
+
+    if (result.data == NULL)
+    {
+        fprintf(stderr, "Fehler: Speicher konnte nicht reserviert werden!\n");
+        return result;
+    }
+
+    for (int i = 0; i < matrix1.rows; i++)
+    {
+        for (int j = 0; j < matrix2.cols; j++)
+        {
+            MatrixType sum = 0.0;
+
+            for (int k = 0; k < matrix1.cols; k++)
+            {
+                sum += matrix1.data[i * matrix1.cols + k] * matrix2.data[k * matrix2.cols + j];
+            }
+            result.data[i * result.cols +j] = sum;
+        }
+    }
+    return result;
+}

matrix.h

@@ -7,6 +7,14 @@ typedef float MatrixType;
 
 // TODO Matrixtyp definieren
 
+typedef struct Matrix {
+    unsigned int rows;
+    unsigned int cols;
+    MatrixType *data;
+    #define buffer data
+}   Matrix;
+
+
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);
 void clearMatrix(Matrix *matrix);

matrixTests.c

@@ -71,32 +71,6 @@ void test_addFailsOnDifferentInputDimensions(void)
     TEST_ASSERT_EQUAL_UINT32(0, result.cols);
 }
 
-void test_addSupportsBroadcasting(void)
-{
-    MatrixType buffer1[] = {1, 2, 3, 4, 5, 6};
-    MatrixType buffer2[] = {7, 8};
-    Matrix matrix1 = {.rows=2, .cols=3, .buffer=buffer1};
-    Matrix matrix2 = {.rows=2, .cols=1, .buffer=buffer2};
-
-    Matrix result1 = add(matrix1, matrix2);
-    Matrix result2 = add(matrix2, matrix1);
-
-    float expectedResults[] = {8, 9, 10, 12, 13, 14};
-
-    TEST_ASSERT_EQUAL_UINT32(matrix1.rows, result1.rows);
-    TEST_ASSERT_EQUAL_UINT32(matrix1.cols, result1.cols);
-    TEST_ASSERT_EQUAL_UINT32(matrix1.rows, result2.rows);
-    TEST_ASSERT_EQUAL_UINT32(matrix1.cols, result2.cols);
-
-    TEST_ASSERT_EQUAL_INT(sizeof(expectedResults)/sizeof(expectedResults[0]), result1.rows * result1.cols);
-    TEST_ASSERT_EQUAL_FLOAT_ARRAY(expectedResults, result1.buffer, result1.cols * result1.rows);
-    TEST_ASSERT_EQUAL_INT(sizeof(expectedResults)/sizeof(expectedResults[0]), result2.rows * result2.cols);
-    TEST_ASSERT_EQUAL_FLOAT_ARRAY(expectedResults, result2.buffer, result2.cols * result2.rows);
-
-    free(result1.buffer);
-    free(result2.buffer);
-}
-
 void test_multiplyReturnsCorrectResults(void)
 {
     MatrixType buffer1[] = {1, 2, 3, 4, 5, 6};
@@ -164,7 +138,7 @@ void test_setMatrixAtFailsOnIndicesOutOfRange(void)
     Matrix matrixToTest = {.rows=2, .cols=3, .buffer=buffer};
 
     setMatrixAt(-1, matrixToTest, 2, 3);
-    TEST_ASSERT_EQUAL_FLOAT_ARRAY(expectedResults, matrixToTest.buffer, sizeof(buffer)/sizeof(MatrixType));
+    TEST_ASSERT_EQUAL_FLOAT_ARRAY(expectedResults, matrixToTest.buffer, matrixToTest.cols * matrixToTest.rows);
 }
 
 void setUp(void) {
@@ -185,7 +159,6 @@ int main()
     RUN_TEST(test_clearMatrixSetsMembersToNull);
     RUN_TEST(test_addReturnsCorrectResult);
     RUN_TEST(test_addFailsOnDifferentInputDimensions);
-    RUN_TEST(test_addSupportsBroadcasting);
     RUN_TEST(test_multiplyReturnsCorrectResults);
     RUN_TEST(test_multiplyFailsOnWrongInputDimensions);
     RUN_TEST(test_getMatrixAtReturnsCorrectResult);