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 */ 49 enum { 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 */ 67 enum { 68 _DRT_WSPACE = 2, 69 _DRT_HEX, 70 }; 71 #ifndef BIT 72 #define BIT(n) (1ull << (n)) 73 #endif 74 enum { 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 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); 88 89 static inline int 90 db_read_token(void) 91 { 92 return (db_read_token_flags(0)); 93 } 94 95 extern db_expr_t db_tok_number; 96 #define TOK_STRING_SIZE 120 97 extern 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