/*-
* SPDX-License-Identifier: MIT-CMU
*
* 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
* 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 the
* rights to redistribute these changes.
*/
#ifndef _DDB_DB_LEX_H_
#define _DDB_DB_LEX_H_
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
/*
* Lexical analyzer.
*/
/*
* Options and flags can configure db_read_token() => db_lex() behavior.
*
* When a radix other than DRT_DEFAULT_RADIX is used, it overrides
* auto-detection, as well as the user-specified db_radix, in db_lex() of
* 'tNUMBER' tokens.
*/
enum {
/* Infer or use db_radix using the old logic. */
DRT_DEFAULT_RADIX = 0,
/* The following set an explicit base for tNUMBER lex. */
DRT_OCTAL,
DRT_DECIMAL,
DRT_HEXADECIMAL,
};
#define DRT_RADIX_MASK 0x3
/*
* Flag bit powers of two for db_read_token_flags.
* The low 2 bits are reserved for radix selection.
*
* WSPACE: Yield explicit tWSPACE tokens when one or more whitespace characters
* is consumed.
* HEX: Allow tNUMBER tokens to start with 'A'-'F' without explicit "0x"
* prefix.
*/
enum {
_DRT_WSPACE = 2,
_DRT_HEX,
};
#ifndef BIT
#define BIT(n) (1ull << (n))
#endif
enum {
DRT_WSPACE = BIT(_DRT_WSPACE),
DRT_HEX = BIT(_DRT_HEX),
};
#define DRT_VALID_FLAGS_MASK ((int)DRT_RADIX_MASK | \
DRT_WSPACE | \
DRT_HEX)
void db_flush_lex(void);
char *db_get_line(void);
void db_inject_line(const char *command);
int db_read_line(void);
int db_read_token_flags(int);
void db_unread_token(int t);
static inline int
db_read_token(void)
{
return (db_read_token_flags(0));
}
extern db_expr_t db_tok_number;
#define TOK_STRING_SIZE 120
extern char db_tok_string[TOK_STRING_SIZE];
#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 tDITTO 15
#define tDOLLAR 16
#define tEXCL 17
#define tSHIFT_L 18
#define tSHIFT_R 19
#define tDOTDOT 20
#define tSEMI 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
#define tBIT_NOT 34
#define tWSPACE 35
#define tCOLON 36
#define tCOLONCOLON 37
#endif /* !_DDB_DB_LEX_H_ */
