drivers/scsi/aic7xxx/aicasm/aicasm_macro_gram.y

   1 %{
   2 /*
   3  * Sub-parser for macro invocation in the Aic7xxx SCSI
   4  * 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_gram.y#5 $
  42  *
  43  * $FreeBSD$
  44  */
  45
  46 #include <sys/types.h>
  47
  48 #include <inttypes.h>
  49 #include <regex.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <sysexits.h>
  54
  55 #ifdef __linux__
  56 #include "../queue.h"
  57 #else
  58 #include <sys/queue.h>
  59 #endif
  60
  61 #include "aicasm.h"
  62 #include "aicasm_symbol.h"
  63 #include "aicasm_insformat.h"
  64
  65 static symbol_t *macro_symbol;
  66
  67 static void add_macro_arg(const char *argtext, int position);
  68
  69 %}
  70
  71 %union {
  72         int             value;
  73         char            *str;
  74         symbol_t        *sym;
  75 }
  76
  77
  78 %token <str> T_ARG
  79
  80 %token <sym> T_SYMBOL
  81
  82 %type <value> macro_arglist
  83
  84 %%
  85
  86 macrocall:
  87         T_SYMBOL '('
  88         {
  89                 macro_symbol = $1;
  90         }
  91         macro_arglist ')'
  92         {
  93                 if (macro_symbol->info.macroinfo->narg != $4) {
  94                         printf("Narg == %d", macro_symbol->info.macroinfo->narg);
  95                         stop("Too few arguments for macro invocation",
  96                              EX_DATAERR);
  97                         /* NOTREACHED */
  98                 }
  99                 macro_symbol = NULL;
 100                 YYACCEPT;
 101         }
 102 ;
 103
 104 macro_arglist:
 105         {
 106                 /* Macros can take 0 arguments */
 107                 $$ = 0;
 108         }
 109 |       T_ARG
 110         {
 111                 $$ = 1;
 112                 add_macro_arg($1, 1);
 113         }
 114 |       macro_arglist ',' T_ARG
 115         {
 116                 if ($1 == 0) {
 117                         stop("Comma without preceeding argument in arg list",
 118                              EX_DATAERR);
 119                         /* NOTREACHED */
 120                 }
 121                 $$ = $1 + 1;
 122                 add_macro_arg($3, $$);
 123         }
 124 ;
 125
 126 %%
 127
 128 static void
 129 add_macro_arg(const char *argtext, int argnum)
 130 {
 131         struct macro_arg *marg;
 132         int i;
 133
 134         if (macro_symbol == NULL || macro_symbol->type != MACRO) {
 135                 stop("Invalid current symbol for adding macro arg",
 136                      EX_SOFTWARE);
 137                 /* NOTREACHED */
 138         }
 139         /*
 140          * Macro Invocation.  Find the appropriate argument and fill
 141          * in the replace ment text for this call.
 142          */
 143         i = 0;
 144         STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
 145                 i++;
 146                 if (i == argnum)
 147                         break;
 148         }
 149         if (marg == NULL) {
 150                 stop("Too many arguments for macro invocation", EX_DATAERR);
 151                 /* NOTREACHED */
 152         }
 153         marg->replacement_text = strdup(argtext);
 154         if (marg->replacement_text == NULL) {
 155                 stop("Unable to replicate replacement text", EX_SOFTWARE);
 156                 /* NOTREACHED */
 157         }
 158 }
 159
 160 void
 161 mmerror(const char *string)
 162 {
 163         stop(string, EX_DATAERR);
 164 }