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 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 }