FreeBSD/Linux Kernel Cross Reference
sys/dev/aic7xxx/aicasm/aicasm_macro_gram.y

     %{
     /*-
      * Sub-parser for macro invocation in the Aic7xxx SCSI
      * Host adapter sequencer assembler.
      *
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2001 Adaptec Inc.
      * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions, and the following disclaimer,
     *    without modification.
     * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     *    substantially similar to the "NO WARRANTY" disclaimer below
     *    ("Disclaimer") and any redistribution must be conditioned upon
     *    including a substantially similar Disclaimer requirement for further
     *    binary redistribution.
     * 3. Neither the names of the above-listed copyright holders nor the names
     *    of any contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * Alternatively, this software may be distributed under the terms of the
     * GNU General Public License ("GPL") version 2 as published by the Free
     * Software Foundation.
     *
     * NO WARRANTY
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGES.
     *
     * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_macro_gram.y#5 $
     *
     * $FreeBSD$
     */
    
    #include <sys/types.h>
    
    #include <inttypes.h>
    #include <regex.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <sysexits.h>
    #include <sys/queue.h>
    
    #include "aicasm.h"
    #include "aicasm_symbol.h"
    #include "aicasm_insformat.h"
    
    static symbol_t *macro_symbol;
    
    static void add_macro_arg(const char *argtext, int position);
    
    extern int mmlex(void);
    extern int mmparse(void);
    
    %}
    
    %union {
            int             value;
            char            *str;
            symbol_t        *sym;
    }
    
    
    %token <str> T_ARG
    
    %token <sym> T_SYMBOL
    
    %type <value> macro_arglist
    
    %%
    
    macrocall:
            T_SYMBOL '('
            {
                    macro_symbol = $1;
            }
            macro_arglist ')'
            {
                    if (macro_symbol->info.macroinfo->narg != $4) {
                            printf("Narg == %d", macro_symbol->info.macroinfo->narg);
                            stop("Too few arguments for macro invocation",
                                 EX_DATAERR);
                            /* NOTREACHED */
                    }
                    macro_symbol = NULL;
                   YYACCEPT;
           }
   ;
   
   macro_arglist:
           {
                   /* Macros can take 0 arguments */
                   $$ = 0;
           }
   |       T_ARG
           {
                   $$ = 1;
                   add_macro_arg($1, 1);
           }
   |       macro_arglist ',' T_ARG
           {
                   if ($1 == 0) {
                           stop("Comma without preceding argument in arg list",
                                EX_DATAERR);
                           /* NOTREACHED */
                   }
                   $$ = $1 + 1;
                   add_macro_arg($3, $$);
           }
   ;
   
   %%
   
   static void
   add_macro_arg(const char *argtext, int argnum)
   {
           struct macro_arg *marg;
           int i;
   
           if (macro_symbol == NULL || macro_symbol->type != MACRO) {
                   stop("Invalid current symbol for adding macro arg",
                        EX_SOFTWARE);
                   /* NOTREACHED */
           }
           /*
            * Macro Invocation.  Find the appropriate argument and fill
            * in the replace ment text for this call.
            */
           i = 0;
           STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
                   i++;
                   if (i == argnum)
                           break;
           }
           if (marg == NULL) {
                   stop("Too many arguments for macro invocation", EX_DATAERR);
                   /* NOTREACHED */
           }
           marg->replacement_text = strdup(argtext);
           if (marg->replacement_text == NULL) {
                   stop("Unable to replicate replacement text", EX_SOFTWARE);
                   /* NOTREACHED */
           }
   }
   
   static void
   mmerror(const char *string)
   {
           stop(string, EX_DATAERR);
   }

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