fix(solutions): memory issues thanks to -fsanitize=address flag with gcc

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/array_2D_int.c

@@ -1,16 +1,10 @@
 #include "array_2D_int.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "character.h"
-
 void array_2D_int_print(int **array, size_t number_of_rows, size_t number_of_columns) {
-  for (size_t i = 0; i < number_of_rows; i++) {
-    for (size_t j = 0; j < number_of_columns; j++) {
-      printf("%d", array[i][j]);
-      if (j != number_of_columns - 1) {
+  for (size_t row = 0; row < number_of_rows; row++) {
+    for (size_t column = 0; column < number_of_columns; column++) {
+      printf("%d", array[row][column]);
+      if (column != number_of_columns - 1) {
         printf(" ");
       }
     }
@@ -19,7 +13,7 @@ void array_2D_int_print(int **array, size_t number_of_rows, size_t number_of_col
 }
 
 int **array_2D_int_input(size_t *number_of_rows, size_t *number_of_columns) {
-  int **array = malloc(sizeof(int *));
+  int **array = malloc(sizeof(int));
   *number_of_rows = 1;
   *number_of_columns = 1;
   array[0] = malloc(*number_of_columns * sizeof(int));
@@ -60,13 +54,13 @@ int **array_2D_int_input(size_t *number_of_rows, size_t *number_of_columns) {
 }
 
 int **array_2D_int_reverse_rows(int **array, size_t *number_of_rows, size_t *number_of_columns) {
-  int **rotated_array = malloc(*number_of_columns * sizeof(int *));
-  for (size_t i = 0; i < *number_of_columns; i++) {
-    rotated_array[i] = malloc(*number_of_rows * sizeof(int));
+  int **rotated_array = malloc(*number_of_rows * sizeof(int));
+  for (size_t row = 0; row < *number_of_rows; row++) {
+    rotated_array[row] = malloc(*number_of_columns * sizeof(int));
   }
-  for (size_t i = 0; i < *number_of_columns; i++) {
-    for (size_t j = 0; j < *number_of_rows; j++) {
-      rotated_array[i][j] = array[*number_of_rows - i - 1][j];
+  for (size_t row = 0; row < *number_of_columns; row++) {
+    for (size_t column = 0; column < *number_of_rows; column++) {
+      rotated_array[row][column] = array[*number_of_rows - row - 1][column];
     }
   }
   return rotated_array;
@@ -74,12 +68,12 @@ int **array_2D_int_reverse_rows(int **array, size_t *number_of_rows, size_t *num
 
 int **array_2D_int_rotate_90_degrees_clockwise(int **array, size_t *number_of_rows, size_t *number_of_columns) {
   int **rotated_array = malloc(*number_of_columns * sizeof(int *));
-  for (size_t i = 0; i < *number_of_columns; i++) {
-    rotated_array[i] = malloc(*number_of_rows * sizeof(int));
+  for (size_t row = 0; row < *number_of_columns; row++) {
+    rotated_array[row] = malloc(*number_of_rows * sizeof(int));
   }
-  for (size_t i = 0; i < *number_of_columns; i++) {
-    for (size_t j = 0; j < *number_of_rows; j++) {
-      rotated_array[i][j] = array[*number_of_rows - j - 1][i];
+  for (size_t row = 0; row < *number_of_columns; row++) {
+    for (size_t column = 0; column < *number_of_rows; column++) {
+      rotated_array[row][column] = array[*number_of_rows - column - 1][row];
     }
   }
   size_t number_of_rows_temp = *number_of_rows;
@@ -89,9 +83,28 @@ int **array_2D_int_rotate_90_degrees_clockwise(int **array, size_t *number_of_ro
 }
 
 int **array_2D_int_rotate_90_degrees_anticlockwise(int **array, size_t *number_of_rows, size_t *number_of_columns) {
-  int **result = array_2D_int_rotate_90_degrees_clockwise(array, number_of_rows, number_of_columns);
-  result = array_2D_int_rotate_90_degrees_clockwise(result, number_of_rows, number_of_columns);
-  result = array_2D_int_rotate_90_degrees_clockwise(result, number_of_rows, number_of_columns);
-  result = array_2D_int_reverse_rows(result, number_of_rows, number_of_columns);
-  return result;
+  int **result_1 = array_2D_int_rotate_90_degrees_clockwise(array, number_of_rows, number_of_columns);
+  size_t number_of_rows_temp = *number_of_rows;
+
+  int **result_2 = array_2D_int_rotate_90_degrees_clockwise(result_1, number_of_rows, number_of_columns);
+  for (size_t row = 0; row < number_of_rows_temp; row++) {
+    free(result_1[row]);
+  }
+  free(result_1);
+  number_of_rows_temp = *number_of_rows;
+
+  int **result_3 = array_2D_int_rotate_90_degrees_clockwise(result_2, number_of_rows, number_of_columns);
+  for (size_t row = 0; row < number_of_rows_temp; row++) {
+    free(result_2[row]);
+  }
+  free(result_2);
+  number_of_rows_temp = *number_of_rows;
+
+  int **result_4 = array_2D_int_reverse_rows(result_3, number_of_rows, number_of_columns);
+  for (size_t row = 0; row < number_of_rows_temp; row++) {
+    free(result_3[row]);
+  }
+  free(result_3);
+
+  return result_4;
 }

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/array_2D_int.h

@@ -1,7 +1,11 @@
 #ifndef __ARRAY_2D_INT__
 #define __ARRAY_2D_INT__
 
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+
+#include "character.h"
 
 /**
  * @brief Prints a 2D array of integers.

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/character.c

@@ -1,8 +1,5 @@
 #include "character.h"
 
-#include <stdlib.h>
-#include <string.h>
-
 void character_append(char* string, char character) {
   size_t length = strlen(string);
   string[length] = character;

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/character.h

@@ -1,6 +1,9 @@
 #ifndef __CHARACTER__
 #define __CHARACTER__
 
+#include <stdlib.h>
+#include <string.h>
+
 /**
  * @brief Append a character to a string, assuming string points to an array
  * with enough space.

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/input.c

@@ -1,10 +1,5 @@
 #include "input.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "character.h"
-
 char* input() {
   char character;
   size_t length = 1;

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/input.h

@@ -1,6 +1,11 @@
 #ifndef __INPUT__
 #define __INPUT__
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "character.h"
+
 /**
  * @brief Read a line from stdin.
  *

challenges/rotate-2-dimensional-array-90-degrees/solutions/c/function/solution.c

@@ -8,19 +8,20 @@ int main() {
   size_t number_of_rows = 0;
   size_t number_of_columns = 0;
   char *direction = input();
-  int **array = array_2D_int_input(&number_of_rows, &number_of_columns);
+  int **array_input = array_2D_int_input(&number_of_rows, &number_of_columns);
 
+  int **array;
   if (strcmp(direction, "clockwise") == 0) {
-    array = array_2D_int_rotate_90_degrees_clockwise(array, &number_of_rows, &number_of_columns);
+    array = array_2D_int_rotate_90_degrees_clockwise(array_input, &number_of_rows, &number_of_columns);
   } else {
-    array = array_2D_int_rotate_90_degrees_anticlockwise(array, &number_of_rows, &number_of_columns);
+    array = array_2D_int_rotate_90_degrees_anticlockwise(array_input, &number_of_rows, &number_of_columns);
   }
   array_2D_int_print(array, number_of_rows, number_of_columns);
 
-  for (size_t i = 0; i < number_of_rows; i++) {
-    free(array[i]);
+  free(direction);
+  for (size_t row = 0; row < number_of_rows; row++) {
+    free(array[row]);
   }
   free(array);
-  free(direction);
   return EXIT_SUCCESS;
 }