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137 lines
3.3 KiB
C
137 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: MIT-CMU
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*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _DDB_DB_LEX_H_
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#define _DDB_DB_LEX_H_
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/*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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/*
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* Lexical analyzer.
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*/
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/*
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* Options and flags can configure db_read_token() => db_lex() behavior.
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*
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* When a radix other than DRT_DEFAULT_RADIX is used, it overrides
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* auto-detection, as well as the user-specified db_radix, in db_lex() of
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* 'tNUMBER' tokens.
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*/
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enum {
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/* Infer or use db_radix using the old logic. */
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DRT_DEFAULT_RADIX = 0,
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/* The following set an explicit base for tNUMBER lex. */
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DRT_OCTAL,
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DRT_DECIMAL,
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DRT_HEXADECIMAL,
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};
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#define DRT_RADIX_MASK 0x3
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/*
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* Flag bit powers of two for db_read_token_flags.
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* The low 2 bits are reserved for radix selection.
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*
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* WSPACE: Yield explicit tWSPACE tokens when one or more whitespace characters
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* is consumed.
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* HEX: Allow tNUMBER tokens to start with 'A'-'F' without explicit "0x"
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* prefix.
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*/
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enum {
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_DRT_WSPACE = 2,
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_DRT_HEX,
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};
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#ifndef BIT
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#define BIT(n) (1ull << (n))
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#endif
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enum {
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DRT_WSPACE = BIT(_DRT_WSPACE),
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DRT_HEX = BIT(_DRT_HEX),
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};
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#define DRT_VALID_FLAGS_MASK ((int)DRT_RADIX_MASK | \
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DRT_WSPACE | \
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DRT_HEX)
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void db_flush_lex(void);
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char *db_get_line(void);
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void db_inject_line(const char *command);
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int db_read_line(void);
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int db_read_token_flags(int);
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void db_unread_token(int t);
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static inline int
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db_read_token(void)
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{
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return (db_read_token_flags(0));
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}
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extern db_expr_t db_tok_number;
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#define TOK_STRING_SIZE 120
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extern char db_tok_string[TOK_STRING_SIZE];
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#define tEOF (-1)
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#define tEOL 1
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#define tNUMBER 2
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#define tIDENT 3
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#define tPLUS 4
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#define tMINUS 5
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#define tDOT 6
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#define tSTAR 7
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#define tSLASH 8
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#define tEQ 9
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#define tLPAREN 10
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#define tRPAREN 11
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#define tPCT 12
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#define tHASH 13
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#define tCOMMA 14
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#define tDITTO 15
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#define tDOLLAR 16
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#define tEXCL 17
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#define tSHIFT_L 18
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#define tSHIFT_R 19
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#define tDOTDOT 20
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#define tSEMI 21
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#define tLOG_EQ 22
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#define tLOG_NOT_EQ 23
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#define tLESS 24
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#define tLESS_EQ 25
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#define tGREATER 26
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#define tGREATER_EQ 27
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#define tBIT_AND 28
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#define tBIT_OR 29
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#define tLOG_AND 30
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#define tLOG_OR 31
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#define tSTRING 32
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#define tQUESTION 33
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#define tBIT_NOT 34
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#define tWSPACE 35
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#define tCOLON 36
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#define tCOLONCOLON 37
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#endif /* !_DDB_DB_LEX_H_ */
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