--- a/lwbasic/lwbasic.h	Mon Jan 24 18:31:07 2011 -0700
+++ b/lwbasic/lwbasic.h	Mon Jan 24 20:08:09 2011 -0700
@@ -26,18 +26,73 @@
 #ifndef __lwbasic_h_seen__
 #define __lwbasic_h_seen__
 
+#include <stdint.h>
+
+/* note: integer and uinteger will be the same for positive values from 0
+through 0x7FFFFFFF; the unsigned type should be used for doing ascii
+conversions and then if a negative value was discovered, it should be
+negated IFF it is in range. */
+
+union lexer_numbers
+{
+	uint32_t uinteger;
+	int32_t integer;
+};
+
 typedef struct
 {
 	char *output_file;
 	char *input_file;
 	
 	int debug_level;
+
+	char *lexer_token_string;
+	union lexer_numbers lexer_token_number;
+	int lexer_token;
+	int lexer_curchar;
+	int lexer_ignorechar;
+	
+	int parser_state;
 	
 	void *input_state;
 } cstate;
 
+/* parser states */
+enum
+{
+	parser_state_global = 0,			/* only global decls allowed */
+	parser_state_error
+};
+
+/* token types */
+enum
+{
+	token_kw_sub,				/* SUB keyword */
+	token_kw_function,			/* FUNCTION keyword */
+	token_kw_as,				/* AS keyword */
+	token_kw_public,			/* PUBLIC keyword */
+	token_kw_private,			/* PRIVATE keyword */
+	token_kw_params,			/* PARAMS keyword */
+	token_kw_returns,			/* RETURNS keyword */
+	token_kw_integer,			/* INTEGER keyword */
+	token_identifier,			/* an identifier (variable, function, etc. */
+	token_char,					/* single character; fallback */
+	token_uint,					/* unsigned integer up to 32 bits */
+	token_int,					/* signed integer up to 32 bits */
+	token_eol,					/* end of line */
+	token_eof					/* end of file */
+};
+
 #ifndef __input_c_seen__
 extern int input_getchar(cstate *state);
 #endif
 
+#ifndef __main_c_seen__
+extern void lwb_error(const char *fmt, ...);
+#endif
+
+#ifndef __lexer_c_seen__
+extern void lexer(cstate *state);
+#endif
+
 #endif /* __lwbasic_h_seen__ */