fix: restored progress from the old parser branch

src/parser/parser.c

@@ -1,12 +1,67 @@
 #include "parser.h"
 
+#include <stdbool.h>
 #include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lexer/lexer.h"
+#include "utils/lists/lists.h"
+
+// === Static functions
+
+/* Returns true if c is a command terminator, false otherwise
+ */
+static bool isterminator(char c)
+{
+    switch (c)
+    {
+    case '\n':
+    case ';':
+    case EOF:
+        return true;
+    default:
+        return false;
+    }
+}
+
+/* Parses a simple list of words (command and arguments)
+ * and returns the resulting ast
+ */
+static struct ast *parse_simple_command(void)
+{
+    struct list *cmd_elements = NULL;
+    char *token = get_token();
+    if (token == NULL) // just in case ?
+        return NULL;
+
+    while (token != NULL && !isterminator(token[0]))
+    {
+        cmd_elements = list_append(cmd_elements, token);
+        token = get_token();
+    }
+
+    if (token == NULL)
+        return NULL; // TODO handle error
+
+    struct ast *result = ast_create_cmd(cmd_elements);
+    return result;
+}
+
+// === Functions
 
 struct ast *get_ast()
 {
-    return NULL;
+    struct ast *result = NULL;
+    struct ast *current_node = NULL;
+
+    // char *token = get_token();
+
+    return result;
 }
 
+// TODO
 struct ast *get_ast_str(char *command)
 {
     (void)command;