Add simple recursive-descent C expression parsing (but we only do the

simple binops so far, type parsing is still way off).

Clean up and update tokenization.

1 files changed, 39 insertions, 0 deletions

diff --git a/lib.c b/lib.c
new file mode 100644
index 0000000..d0b9d66
--- /dev/null
+++ b/lib.c
@@ -0,0 +1,39 @@
+/*
+ * Helper routines
+ */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "token.h"
+
+void warn(struct token *token, const char * fmt, ...)
+{
+	static char buffer[512];
+	struct stream *stream;
+
+	va_list args;
+	va_start(args, fmt);
+	vsprintf(buffer, fmt, args);
+	va_end(args);
+
+	stream = input_streams + token->stream;
+	fprintf(stderr, "warning: %s:%d: %s\n",
+		stream->name, token->line,
+		buffer);
+}	
+
+
+void die(const char *fmt, ...)
+{
+	va_list args;
+	static char buffer[512];
+
+	va_start(args, fmt);
+	vsnprintf(buffer, sizeof(buffer), fmt, args);
+	va_end(args);
+
+	fprintf(stderr, "%s\n", buffer);
+	exit(1);
+}
+
+