merge new parser into dev

src/utils/ast/ast.c

@@ -10,7 +10,7 @@
 
 void ast_free(struct ast **node)
 {
-    if (*node == NULL)
+    if (node == NULL || *node == NULL)
         return;
     // ast void does not need to be freed.
     if (ast_is_if(*node))

src/utils/ast/ast.h

@@ -9,6 +9,7 @@
 #include "ast_list.h"
 #include "ast_redir.h"
 #include "ast_void.h"
+#include "ast_word.h"
 
 /**
  * Prints the Graphviz DOT representation of the given AST to stdout.

src/utils/ast/ast_base.h

@@ -11,7 +11,8 @@ enum ast_type
     AST_AND_OR,
     AST_REDIR,
     AST_VOID,
-    AST_CMD
+    AST_CMD,
+    AST_WORD
 };
 
 struct ast

src/utils/ast/ast_word.c

@@ -0,0 +1,45 @@
+#include "ast_word.h"
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct ast *ast_create_word(char *word)
+{
+    struct ast_word *ast_node = malloc(sizeof(struct ast_word));
+    if (ast_node == NULL)
+        return NULL;
+
+    ast_node->type = AST_WORD;
+    ast_node->word = strdup(word);
+    struct ast *res = ast_create(AST_WORD, ast_node);
+    if (res == NULL)
+    {
+        free(ast_node);
+        return NULL;
+    }
+
+    return res;
+}
+
+struct ast_word *ast_get_word(struct ast *node)
+{
+    if (node == NULL || node->type != AST_WORD)
+        return NULL;
+
+    return node->data;
+}
+
+bool ast_is_word(struct ast *node)
+{
+    return node && node->type == AST_WORD;
+}
+
+void ast_free_word(struct ast_word *ast_node)
+{
+    if (ast_node == NULL)
+        return;
+
+    free(ast_node->word);
+    free(ast_node);
+}

src/utils/ast/ast_word.h

@@ -0,0 +1,35 @@
+#ifndef AST_WORD_H
+#define AST_WORD_H
+
+#include <stdbool.h>
+
+#include "ast_base.h"
+
+struct ast_word
+{
+    enum ast_type type;
+    char *word;
+};
+
+/**
+ * Checks if the given AST node is a command.
+ */
+bool ast_is_word(struct ast *node);
+
+/**
+ * Retrieves the command data from the given AST node.
+ * Assumes that the node is of type AST_CMD.
+ */
+struct ast_word *ast_get_word(struct ast *node);
+
+/**
+ * Creates a new AST node representing a command.
+ */
+struct ast *ast_create_word(char* word);
+
+/*
+ * @brief: frees the given ast_command and sets the pointer to NULL.
+ */
+void ast_free_word(struct ast_word *ast_node);
+
+#endif /* ! AST_WORD_H */