add: strshift and lst_clear

src/lst/lst.h

@@ -1,5 +1,6 @@
 #pragma once
 #include <stddef.h>
+#include <stdlib.h>
 
 typedef struct s_lst
 {

src/lst/lst_clear.c

@@ -0,0 +1,16 @@
+#include "./lst.h"
+
+void lst_clear(lst **root, void (*del)(void *))
+{
+	lst* current = *root;
+	lst* next;
+
+	while (current != NULL)
+	{
+		next = current->next;
+		(*del)(current->content);
+		free(current);
+		current = next;
+	}
+	free(root);
+}

src/lst/lst_iter.c

@@ -6,7 +6,7 @@ void lst_iter(lst** root, void (*f)(void *))
 
 	while (current != NULL)
 	{
-		(*f)(current);
+		(*f)(current->content);
 		current = current->next;
 	}
 }

src/str/str_shift.c

@@ -2,8 +2,10 @@
 
 void str_shift(char *str, int shift)
 {
-	for (size_t i = 0; str[i] == '\0'; i++)
+	size_t i = 0;
+	while (str[i - shift - 1] != '\0')
 	{
-
+		str[i] = str[i - shift];
+		i++;
 	}
 }