1/*- 2 * SPDX-License-Identifier: MIT-CMU 3 * 4 * Mach Operating System 5 * Copyright (c) 1991,1990 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 * 28 * $FreeBSD$ 29 */ 30 31#ifndef _DDB_DB_LEX_H_ 32#define _DDB_DB_LEX_H_ 33 34/* 35 * Author: David B. Golub, Carnegie Mellon University 36 * Date: 7/90 37 */ 38/* 39 * Lexical analyzer. 40 */ 41 42/* 43 * Options and flags can configure db_read_token() => db_lex() behavior. 44 * 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 47 * 'tNUMBER' tokens. 48 */ 49enum { 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. */ 53 DRT_OCTAL, 54 DRT_DECIMAL, 55 DRT_HEXADECIMAL, 56}; 57#define DRT_RADIX_MASK 0x3 58/* 59 * Flag bit powers of two for db_read_token_flags. 60 * The low 2 bits are reserved for radix selection. 61 * 62 * WSPACE: Yield explicit tWSPACE tokens when one or more whitespace characters 63 * is consumed. 64 * HEX: Allow tNUMBER tokens to start with 'A'-'F' without explicit "0x" 65 * prefix. 66 */ 67enum { 68 _DRT_WSPACE = 2, 69 _DRT_HEX, 70}; 71#ifndef BIT 72#define BIT(n) (1ull << (n)) 73#endif 74enum { 75 DRT_WSPACE = BIT(_DRT_WSPACE), 76 DRT_HEX = BIT(_DRT_HEX), 77}; 78#define DRT_VALID_FLAGS_MASK ((int)DRT_RADIX_MASK | \ 79 DRT_WSPACE | \ 80 DRT_HEX) 81 82void db_flush_lex(void); 83char *db_get_line(void); 84void db_inject_line(const char *command); 85int db_read_line(void); 86int db_read_token_flags(int); 87void db_unread_token(int t); 88 89static inline int 90db_read_token(void) 91{ 92 return (db_read_token_flags(0)); 93} 94 95extern db_expr_t db_tok_number; 96#define TOK_STRING_SIZE 120 97extern char db_tok_string[TOK_STRING_SIZE]; 98 99#define tEOF (-1) 100#define tEOL 1 101#define tNUMBER 2 102#define tIDENT 3 103#define tPLUS 4 104#define tMINUS 5 105#define tDOT 6 106#define tSTAR 7 107#define tSLASH 8 108#define tEQ 9 109#define tLPAREN 10 110#define tRPAREN 11 111#define tPCT 12 112#define tHASH 13 113#define tCOMMA 14 114#define tDITTO 15 115#define tDOLLAR 16 116#define tEXCL 17 117#define tSHIFT_L 18 118#define tSHIFT_R 19 119#define tDOTDOT 20 120#define tSEMI 21 121#define tLOG_EQ 22 122#define tLOG_NOT_EQ 23 123#define tLESS 24 124#define tLESS_EQ 25 125#define tGREATER 26 126#define tGREATER_EQ 27 127#define tBIT_AND 28 128#define tBIT_OR 29 129#define tLOG_AND 30 130#define tLOG_OR 31 131#define tSTRING 32 132#define tQUESTION 33 133#define tBIT_NOT 34 134#define tWSPACE 35 135#define tCOLON 36 136#define tCOLONCOLON 37 137 138#endif /* !_DDB_DB_LEX_H_ */ 139