Merge branch 'ast' into dev

src/utils/ast/ast.c

@@ -11,7 +11,7 @@ void ast_free(struct ast **node)
 {
     if (node == NULL || *node == NULL)
     {
-        perror(
+        fprintf(stderr, 
             "WARNING: Internal error: failed to free AST node (NULL argument)");
         return;
     }
@@ -48,12 +48,15 @@ void ast_free(struct ast **node)
     case AST_LOOP:
         ast_free_loop(ast_get_loop(*node));
         break;
+    case AST_FUNCTION:
+        ast_free_function(ast_get_function(*node));
+        break;
     case AST_VOID:
     case AST_END:
         break;
 
     default:
-        perror("WARNING: Internal error: failed to free an AST node (Unknown "
+        fprintf(stderr, "WARNING: Internal error: failed to free an AST node (Unknown "
                "type)");
         return;
     }

src/utils/ast/ast_base.h

@@ -17,7 +17,8 @@ enum ast_type
     AST_PIPE,
     AST_NEG,
     AST_LOOP,
-    AST_ASSIGNMENT
+    AST_ASSIGNMENT,
+    AST_FUNCTION
 };
 
 struct ast

src/utils/ast/ast_function.c

@@ -0,0 +1,40 @@
+#include "ast_function.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ast_base.h"
+
+bool ast_is_function(struct ast *node)
+{
+    return node != NULL && node->type == AST_FUNCTION;
+}
+
+struct ast_function *ast_get_function(struct ast *node)
+{
+    if (!ast_is_function(node))
+        return NULL;
+    return (struct ast_function *)node->data;
+}
+
+struct ast *ast_create_function(char *name, struct ast *value)
+{
+    struct ast_function *function_data = malloc(sizeof(struct ast_function));
+    if (!function_data)
+        return NULL;
+
+    function_data->name = strdup(name);
+    function_data->value = value;
+
+    return ast_create(AST_FUNCTION, function_data);
+}
+
+void ast_free_function(struct ast_function *function_data)
+{
+    if (function_data)
+    {
+        free(function_data->name);
+        ast_free(&function_data->value);
+        free(function_data);
+    }
+}

src/utils/ast/ast_function.h

@@ -0,0 +1,31 @@
+#ifndef AST_FUNCTION_H
+#define AST_FUNCTION_H
+
+struct ast_function
+{
+    char *name;
+    struct ast *value;
+};
+
+
+/**
+ * Checks if the given AST node is an ast_function
+ */
+bool ast_is_function(struct ast *node);
+
+/**
+ * Retrieves the function data from the given AST node.
+ * Assumes that the node is of type AST_function.
+ */
+struct ast_function *ast_get_function(struct ast *node);
+
+/**
+ * Creates a new AST node representing an AST_function
+ */
+struct ast *ast_create_function(char *name, struct ast *value);
+/*
+ * @brief: frees the given ast_function and sets the pointer to NULL.
+ */
+void ast_free_function(struct ast_function *function_data);
+
+#endif /* AST_FUNCTION_H */