106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include "matrix.h"
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// TODO Matrix-Funktionen implementieren
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Matrix createMatrix(unsigned int rows, unsigned int cols)
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{
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Matrix m = {NULL, rows, cols} //Wahrscheinlich in Programm bereits enthalten;
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if (rows > 0 && cols > 0)
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{
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m.buffer = (MatrixType *)calloc(rows * cols, sizeof(MatrixType));
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if (m.buffer == NULL)
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{
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m.rows = 0;
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m.cols = 0;
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}
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}
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return m;
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}
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void clearMatrix(Matrix *matrix)
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{
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if (matrix != NULL)
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{
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free(matrix->buffer);
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matrix->buffer = NULL;
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matrix->rows = 0;
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matrix->cols = 0;
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}
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}
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void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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//not testet
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{
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if (rowIdx < matrix.rows && colIdx < matrix.cols && matrix.buffer != NULL)
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matrix.buffer[rowIdx * matrix.cols + colIdx] = value;
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}
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MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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{
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if (rowIdx >= matrix.rows || colIdx >= matrix.cols || matrix.buffer == NULL)
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return 0; // Sicherheitscheck
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return matrix.buffer[rowIdx * matrix.cols + colIdx];
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}
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//TODO: Funktionen implementieren
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Matrix add(const Matrix matrix1, const Matrix matrix2)
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{
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//Needed: rows/Zeilen, collums/Spalten
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//test, if two matrix has exact size
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if(matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols)
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return createMatrix(0,0);
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Matrix result_add = createMatrix(matrix1.rows, matrix1.cols);
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for(int r = 0; r < matrix1.rows; r++)
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{
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for(int c = 0; c < matrix1.cols; c++)
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{
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//TODO: matrix_add initialisieren
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//matrix_add[r][c] = matrix1[r][c] + matrix2[r][c]
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MatrixType sum = getMatrixAt(matrix1,r,c)+getMatrixAt(matrix2,r,c);
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setMatrixAt(sum,result_add,r,c) //evtl re
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}
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}
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}
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Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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{
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//Needed: rows/Zeilen, collums/Spalten
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MatrixType buffer_add = 0; //TODO: Datentyp achten, ist int richitg?
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Matrix result = {NULL, 0, 0}; //Leere Matrix, falls fehler
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//Probe ob Spalten1 = Zeilen2
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if(matrix1.cols != matrix2.rows)
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return -1;
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result = createMatrix(matrix1.rows, matrix2.cols); // ""
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for(int index = 0; index < matrix1.rows; index++)
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{
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for(int shift = 0; shift < matrix2.cols; shift++)
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{
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for(int skalar = 0; skalar<matrix1.cols; skalar++)
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//TODO: matrix_add initialisieren
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{
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//buffer_add += matrix1[index][skalar]*matrix2[skalar][index];
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buffer_add += getMatrixAt(matrix1, index, skalar) * getMatrixAt(matrix2, skalar, shift);
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}
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//matrix_mul[index][shift] = buffer_add;
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setMatrixAt(buffer_add,result,index,shift); //result als Pointer, also mit &result
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}
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buffer_add = 0;
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}
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} |