Minibox: Add a somewhat improved shell

This shell actually lexes and produces a AST which makes it easier to
add features and will makes it more difficult to introduce bugs. So
basically it is just better code.

1 files changed, 24 insertions, 0 deletions

diff --git a/userland/minibox/utilities/sh/lexer.h b/userland/minibox/utilities/sh/lexer.h
new file mode 100644
index 0000000..57fb30b
--- /dev/null
+++ b/userland/minibox/utilities/sh/lexer.h
@@ -0,0 +1,24 @@
+#ifndef LEXER_H
+#define LEXER_H
+#include <stddef.h>
+
+typedef enum {
+  TOKEN_CHARS,
+  TOKEN_AND,
+  TOKEN_NOT,
+  TOKEN_NOOP,
+  TOKEN_PIPE,
+  TOKEN_STREAM,
+  TOKEN_STREAM_APPEND,
+} token_type_t;
+
+struct TOKEN {
+  token_type_t type;
+  char string_rep[256];
+  struct TOKEN *next;
+};
+
+struct TOKEN *lex(const char *code);
+struct AST *generate_ast(struct TOKEN *token);
+void free_tokens(struct TOKEN *token);
+#endif // LEXER_H