Feat: ability to pretty-printer the shell ast when parsing arguments.

src/ast/ast_printable.c

@@ -0,0 +1,80 @@
+/**
+ * Copyright (C) 2023 hugo
+ * 
+ * This file is part of TekSH.
+ * 
+ * TekSH is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * TekSH is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with TekSH.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "shell.h"
+
+void
+ast_printable(node_t *node, shell_t *shell)
+{
+    if (node == NULL) return;
+    switch (node->type) {
+        case NODE_SEMICOLON:
+            ast_printable(node->left, shell);
+            _print(" ; ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_PIPE:
+            ast_printable(node->left, shell);
+            _print(" | ")
+            ast_printable(node->right, shell);
+            break;
+        case NODE_REDIRECT_IN:
+        case NODE_REDIRECT_OUT:
+        case NODE_REDIRECT_APPEND:
+            ast_printable(node->left, shell);
+            if (node->type == NODE_REDIRECT_IN)
+                _print(" < ");
+            if (node->type == NODE_REDIRECT_OUT)
+                _print(" > ");
+            if (node->type == NODE_REDIRECT_APPEND)
+                _print(" >> ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_REDIRECT_HEREDOC:
+            ast_printable(node->left, shell);
+            _print(" << ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_AND:
+            ast_printable(node->left, shell);
+            _print(" && ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_OR:
+            ast_printable(node->left, shell);
+            _print(" || ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_BACK:
+            ast_printable(node->left, shell);
+            _print(" & ");
+            ast_printable(node->right, shell);
+            break;
+        case NODE_SUBSHELL:
+            break;
+        case NODE_ARGUMENT:
+            {
+            _printf("%s", node->value);
+            break;
+            }
+        default:
+            exit_shell(shell);
+    }
+    return;
+}