TP_13 exo1: Beautify an error message

[TD_C.git] / TP_13 / exo1 / lib / array.c

diff --git a/TP_13/exo1/lib/array.c b/TP_13/exo1/lib/array.c
index db8ab7e408d625d00db9873d5c363d5d22d1e0c8..0922fe247add3bfe1e833061d2b238a509efb57f 100644 (file)
--- a/TP_13/exo1/lib/array.c
+++ b/TP_13/exo1/lib/array.c
@@ -15,7 +15,8 @@ int* create_tab(int tab[], unsigned tab_size) {
 }
 
 void free_tab(int tab[]) {
-    free(tab);
+    if (!tab)
+        free(tab);
 }
 
 /* we suppose both tabs are already created */
@@ -23,7 +24,7 @@ static void copy_tab(int src_tab[], int dest_tab[], unsigned src_tab_size, unsig
     /* FIXME: I think it's worth doing some sanity checks on the array size:
      * dest_tab_size >= src_tab_size */
     if (src_tab == NULL || dest_tab == NULL) {
-        printf("please ensure you have created both arrays beforehand\n");
+        printf("Please ensure you have created both arrays beforehand\n");
         return;
     }
     for (unsigned i = 0; i < src_tab_size; i++) {
@@ -43,6 +44,7 @@ int* concat_tab(int tab1[], unsigned tab_size1, int tab2[], unsigned tab_size2)
 
 int* resize_tab(int tab[], unsigned old_tab_size, unsigned new_tab_size) {
     tab = realloc(tab, sizeof(int) * new_tab_size);
+    /* zero by default the added cells */
     if (old_tab_size < new_tab_size) {
         for (unsigned i = old_tab_size; i < new_tab_size; i++) {
             tab[i] = 0;