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4 * Mach Operating System
5 * Copyright (c) 1991,1990 Carnegie Mellon University
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21 * School of Computer Science
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29 #ifndef _DDB_DB_LEX_H_
30 #define _DDB_DB_LEX_H_
33 * Author: David B. Golub, Carnegie Mellon University
41 * Options and flags can configure db_read_token() => db_lex() behavior.
43 * When a radix other than DRT_DEFAULT_RADIX is used, it overrides
44 * auto-detection, as well as the user-specified db_radix, in db_lex() of
48 /* Infer or use db_radix using the old logic. */
49 DRT_DEFAULT_RADIX = 0,
50 /* The following set an explicit base for tNUMBER lex. */
55 #define DRT_RADIX_MASK 0x3
57 * Flag bit powers of two for db_read_token_flags.
58 * The low 2 bits are reserved for radix selection.
60 * WSPACE: Yield explicit tWSPACE tokens when one or more whitespace characters
62 * HEX: Allow tNUMBER tokens to start with 'A'-'F' without explicit "0x"
70 #define BIT(n) (1ull << (n))
73 DRT_WSPACE = BIT(_DRT_WSPACE),
74 DRT_HEX = BIT(_DRT_HEX),
76 #define DRT_VALID_FLAGS_MASK ((int)DRT_RADIX_MASK | \
80 void db_flush_lex(void);
81 char *db_get_line(void);
82 void db_inject_line(const char *command);
83 int db_read_line(void);
84 int db_read_token_flags(int);
85 void db_unread_token(int t);
90 return (db_read_token_flags(0));
93 extern db_expr_t db_tok_number;
94 #define TOK_STRING_SIZE 120
95 extern char db_tok_string[TOK_STRING_SIZE];
120 #define tLOG_NOT_EQ 23
124 #define tGREATER_EQ 27
134 #define tCOLONCOLON 37
136 #endif /* !_DDB_DB_LEX_H_ */