1 %{ 2 /*- 3 * Sub-Lexical Analyzer for macro invokation in 4 * the Aic7xxx SCSI Host adapter sequencer assembler. 5 * 6 * SPDX-License-Identifier: BSD-3-Clause 7 * 8 * Copyright (c) 2001 Adaptec Inc. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 * 43 * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_macro_scan.l#8 $ 44 * 45 * $FreeBSD$ 46 */ 47 48 #include <sys/types.h> 49 50 #include <inttypes.h> 51 #include <limits.h> 52 #include <regex.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include <sysexits.h> 56 #include <sys/queue.h> 57 58 #include "aicasm.h" 59 #include "aicasm_symbol.h" 60 #include "aicasm_macro_gram.h" 61 62 #define MAX_STR_CONST 4096 63 static char string_buf[MAX_STR_CONST]; 64 static char *string_buf_ptr; 65 static int parren_count; 66 static char msgbuf[255]; 67 68 extern int mmlex(void); 69 %} 70 71 %option noinput 72 73 WORD [A-Za-z_][-A-Za-z_0-9]* 74 SPACE [ \t]+ 75 MCARG [^(), \t]+ 76 77 %x ARGLIST 78 79 %% 80 \n { 81 ++yylineno; 82 } 83 \r ; 84 <ARGLIST>{SPACE} ; 85 <ARGLIST>\( { 86 parren_count++; 87 if (parren_count == 1) { 88 string_buf_ptr = string_buf; 89 return ('('); 90 } 91 *string_buf_ptr++ = '('; 92 } 93 <ARGLIST>\) { 94 if (parren_count == 1) { 95 if (string_buf_ptr != string_buf) { 96 /* 97 * Return an argument and 98 * rescan this parren so we 99 * can return it as well. 100 */ 101 *string_buf_ptr = '\0'; 102 mmlval.str = string_buf; 103 string_buf_ptr = string_buf; 104 unput(')'); 105 return T_ARG; 106 } 107 BEGIN INITIAL; 108 return (')'); 109 } 110 parren_count--; 111 *string_buf_ptr++ = ')'; 112 } 113 <ARGLIST>{MCARG} { 114 char *yptr; 115 116 yptr = mmtext; 117 while (*yptr) 118 *string_buf_ptr++ = *yptr++; 119 } 120 <ARGLIST>\, { 121 if (string_buf_ptr != string_buf) { 122 /* 123 * Return an argument and 124 * rescan this comma so we 125 * can return it as well. 126 */ 127 *string_buf_ptr = '\0'; 128 mmlval.str = string_buf; 129 string_buf_ptr = string_buf; 130 unput(','); 131 return T_ARG; 132 } 133 return ','; 134 } 135 {WORD}[(] { 136 /* May be a symbol or a macro invocation. */ 137 mmlval.sym = symtable_get(mmtext); 138 if (mmlval.sym->type != MACRO) { 139 stop("Expecting Macro Name", 140 EX_DATAERR); 141 } 142 unput('('); 143 parren_count = 0; 144 BEGIN ARGLIST; 145 return T_SYMBOL; 146 } 147 . { 148 snprintf(msgbuf, sizeof(msgbuf), "Invalid character " 149 "'%c'", mmtext[0]); 150 stop(msgbuf, EX_DATAERR); 151 } 152 %% 153 154 int 155 mmwrap(void) 156 { 157 stop("EOF encountered in macro call", EX_DATAERR); 158 return (1); 159 } 160