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4 * Mach Operating System
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21 * School of Computer Science
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31 #ifndef _DDB_DB_LEX_H_
32 #define _DDB_DB_LEX_H_
35 * Author: David B. Golub, Carnegie Mellon University
43 * Options and flags can configure db_read_token() => db_lex() behavior.
45 * When a radix other than DRT_DEFAULT_RADIX is used, it overrides
46 * auto-detection, as well as the user-specified db_radix, in db_lex() of
50 /* Infer or use db_radix using the old logic. */
51 DRT_DEFAULT_RADIX = 0,
52 /* The following set an explicit base for tNUMBER lex. */
57 #define DRT_RADIX_MASK 0x3
59 * Flag bit powers of two for db_read_token_flags.
60 * The low 2 bits are reserved for radix selection.
62 * WSPACE: Yield explicit tWSPACE tokens when one or more whitespace characters
64 * HEX: Allow tNUMBER tokens to start with 'A'-'F' without explicit "0x"
72 #define BIT(n) (1ull << (n))
75 DRT_WSPACE = BIT(_DRT_WSPACE),
76 DRT_HEX = BIT(_DRT_HEX),
78 #define DRT_VALID_FLAGS_MASK ((int)DRT_RADIX_MASK | \
82 void db_flush_lex(void);
83 char *db_get_line(void);
84 void db_inject_line(const char *command);
85 int db_read_line(void);
86 int db_read_token_flags(int);
87 void db_unread_token(int t);
92 return (db_read_token_flags(0));
95 extern db_expr_t db_tok_number;
96 #define TOK_STRING_SIZE 120
97 extern char db_tok_string[TOK_STRING_SIZE];
122 #define tLOG_NOT_EQ 23
126 #define tGREATER_EQ 27
136 #define tCOLONCOLON 37
138 #endif /* !_DDB_DB_LEX_H_ */