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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * Author: David B. Golub, Carnegie Mellon University
+ * Date: 7/90
+ */
+/*
+ * Lexical analyzer.
+ */
+
+#define TOK_STRING_SIZE 64
+#define DB_LEX_LINE_SIZE 256
+
+struct db_lex_context {
+ int l_char; /* peek char */
+ int l_token; /* peek token */
+ char *l_ptr; /* line pointer */
+ char *l_eptr; /* line end pointer */
+};
+
+extern int db_read_line(/* char *rep_str */);
+extern void db_flush_line();
+extern int db_read_char();
+extern void db_unread_char(/* char c */);
+extern int db_read_token();
+extern void db_unread_token(/* int t */);
+extern void db_flush_lex();
+extern void db_switch_input(/* char *, int */);
+extern void db_save_lex_context(/* struct db_lex_context * */);
+extern void db_restore_lex_context(/* struct db_lex_context * */);
+extern void db_skip_to_eol();
+
+extern db_expr_t db_tok_number;
+extern char db_tok_string[TOK_STRING_SIZE];
+extern db_expr_t db_radix;
+
+#define tEOF (-1)
+#define tEOL 1
+#define tNUMBER 2
+#define tIDENT 3
+#define tPLUS 4
+#define tMINUS 5
+#define tDOT 6
+#define tSTAR 7
+#define tSLASH 8
+#define tEQ 9
+#define tLPAREN 10
+#define tRPAREN 11
+#define tPCT 12
+#define tHASH 13
+#define tCOMMA 14
+#define tQUOTE 15
+#define tDOLLAR 16
+#define tEXCL 17
+#define tSHIFT_L 18
+#define tSHIFT_R 19
+#define tDOTDOT 20
+#define tSEMI_COLON 21
+#define tLOG_EQ 22
+#define tLOG_NOT_EQ 23
+#define tLESS 24
+#define tLESS_EQ 25
+#define tGREATER 26
+#define tGREATER_EQ 27
+#define tBIT_AND 28
+#define tBIT_OR 29
+#define tLOG_AND 30
+#define tLOG_OR 31
+#define tSTRING 32
+#define tQUESTION 33