igen: Start work on writing a preprocessor.

1 files changed, 47 insertions, 0 deletions

diff --git a/igen/preprocessor.h b/igen/preprocessor.h
new file mode 100644
index 0000000..7a85e45
--- /dev/null
+++ b/igen/preprocessor.h
@@ -0,0 +1,47 @@
+#ifndef PREPROCESSOR_H
+#define PREPROCESSOR_H
+
+typedef enum comment_type comment_type;
+typedef struct cursor cursor;
+typedef struct whitespace whitespace;
+typedef struct comment comment;
+typedef struct source source;
+
+enum comment_type {
+	COMM_NONE,
+	COMM_MULTI,
+	COMM_SINGLE,
+	NUM_COMMS
+};
+
+struct cursor {
+	int line;
+	int column;
+};
+
+struct whitespace {
+	int spaces;
+	int bspaces;
+	int tabs;
+	int vtabs;
+	int lines;
+};
+
+struct comment {
+	enum comment_type type;
+	char *text;
+	cursor start_pos;
+	cursor end_pos;
+	whitespace wsp;
+};
+
+struct source {
+	source **include_list;
+	char *filename;
+	char *text;
+	int tab_width;
+	cursor cur;
+};
+
+extern source *preprocess(const char *str, int dbg);
+#endif