Implemented some ast handlings...

ast lists, and_or, redirection and builtins

src/utils/ast/ast_and_or.c

@@ -0,0 +1,35 @@
+#include "utils/ast/ast_and_or.h"
+#include <stdlib.h>
+
+bool ast_is_and_or(struct ast *node)
+{
+    return node != NULL && node->type == AST_AND_OR;
+}
+
+struct ast_and_or *ast_get_and_or(struct ast *node)
+{
+    if (ast_is_and_or(node))
+        return (struct ast_and_or *)node->data;
+    return NULL;
+}
+
+struct ast *ast_create_and_or(struct ast *left, struct ast *right, enum ast_and_or_type type)
+{
+    struct ast_and_or *and_or = malloc(sizeof(struct ast_and_or));
+    if (!and_or)
+        return NULL;
+    and_or->left = left;
+    and_or->right = right;
+    and_or->type = type;
+
+    return ast_create(AST_AND_OR, and_or);
+}
+
+void ast_free_and_or(struct ast_and_or *and_or)
+{
+    if (!and_or)
+        return;
+    ast_free(&and_or->left);
+    ast_free(&and_or->right);
+    free(and_or);
+}