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