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