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