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 #include <sys/queue.h> 55 56 #include "aicasm.h" 57 #include "aicasm_symbol.h" 58 #include "aicasm_macro_gram.h" 59 60 #define MAX_STR_CONST 4096 61 static char string_buf[MAX_STR_CONST]; 62 static char *string_buf_ptr; 63 static int parren_count; 64 static char msgbuf[255]; 65 66 extern int mmlex(void); 67 %} 68 69 WORD [A-Za-z_][-A-Za-z_0-9]* 70 SPACE [ \t]+ 71 MCARG [^(), \t]+ 72 73 %x ARGLIST 74 75 %% 76 \n { 77 ++yylineno; 78 } 79 \r ; 80 <ARGLIST>{SPACE} ; 81 <ARGLIST>\( { 82 parren_count++; 83 if (parren_count == 1) { 84 string_buf_ptr = string_buf; 85 return ('('); 86 } 87 *string_buf_ptr++ = '('; 88 } 89 <ARGLIST>\) { 90 if (parren_count == 1) { 91 if (string_buf_ptr != string_buf) { 92 /* 93 * Return an argument and 94 * rescan this parren so we 95 * can return it as well. 96 */ 97 *string_buf_ptr = '\0'; 98 mmlval.str = string_buf; 99 string_buf_ptr = string_buf; 100 unput(')'); 101 return T_ARG; 102 } 103 BEGIN INITIAL; 104 return (')'); 105 } 106 parren_count--; 107 *string_buf_ptr++ = ')'; 108 } 109 <ARGLIST>{MCARG} { 110 char *yptr; 111 112 yptr = mmtext; 113 while (*yptr) 114 *string_buf_ptr++ = *yptr++; 115 } 116 <ARGLIST>\, { 117 if (string_buf_ptr != string_buf) { 118 /* 119 * Return an argument and 120 * rescan this comma so we 121 * can return it as well. 122 */ 123 *string_buf_ptr = '\0'; 124 mmlval.str = string_buf; 125 string_buf_ptr = string_buf; 126 unput(','); 127 return T_ARG; 128 } 129 return ','; 130 } 131 {WORD}[(] { 132 /* May be a symbol or a macro invocation. */ 133 mmlval.sym = symtable_get(mmtext); 134 if (mmlval.sym->type != MACRO) { 135 stop("Expecting Macro Name", 136 EX_DATAERR); 137 } 138 unput('('); 139 parren_count = 0; 140 BEGIN ARGLIST; 141 return T_SYMBOL; 142 } 143 . { 144 snprintf(msgbuf, sizeof(msgbuf), "Invalid character " 145 "'%c'", mmtext[0]); 146 stop(msgbuf, EX_DATAERR); 147 } 148 %% 149 150 int 151 mmwrap(void) 152 { 153 stop("EOF encountered in macro call", EX_DATAERR); 154 return (1); 155 } 156