sys/dev/aic7xxx/aicasm/aicasm_macro_scan.l

   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 }