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%{
/*
 * Sub-Lexical Analyzer for macro invokation in 
 * the Aic7xxx SCSI Host adapter sequencer assembler.
 *
 * 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: aicasm_macro_scan.l,v 1.1.1.1 2004-04-15 02:16:33 phoenix Exp $
 *
 * $FreeBSD$
 */

#include <sys/types.h>

#include <inttypes.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#ifdef __linux__
#include "../queue.h"
#else
#include <sys/queue.h>
#endif

#include "aicasm.h"
#include "aicasm_symbol.h"
#include "aicasm_macro_gram.h"

#define MAX_STR_CONST 4096
static char string_buf[MAX_STR_CONST];
static char *string_buf_ptr;
static int  parren_count;
static char buf[255];
%}

WORD            [A-Za-z_][-A-Za-z_0-9]*
SPACE           [ \t]+
MCARG           [^(), \t]+

%x ARGLIST

%%
\n                      {
                                ++yylineno;
                        }
<ARGLIST>{SPACE}        ;
<ARGLIST>\(             {
                                parren_count++;
                                if (parren_count == 1) {
                                        string_buf_ptr = string_buf;
                                        return ('(');
                                }
                                *string_buf_ptr++ = '(';
                        }
<ARGLIST>\)             {
                                if (parren_count == 1) {
                                        if (string_buf_ptr != string_buf) {
                                                /*
                                                 * Return an argument and
                                                 * rescan this parren so we
                                                 * can return it as well.
                                                 */
                                                *string_buf_ptr = '\0';
                                                mmlval.str = string_buf;
                                                string_buf_ptr = string_buf;
                                                unput(')');
                                                return T_ARG;
                                        }
                                        BEGIN INITIAL;
                                        return (')');
                                }
                                parren_count--;
                                *string_buf_ptr++ = ')';
                        }
<ARGLIST>{MCARG}        {
                                char *yptr;

                                yptr = mmtext;
                                while (*yptr)
                                        *string_buf_ptr++ = *yptr++;
                        }
<ARGLIST>\,             {
                                if (string_buf_ptr != string_buf) {
                                        /*
                                         * Return an argument and
                                         * rescan this comma so we
                                         * can return it as well.
                                         */
                                        *string_buf_ptr = '\0';
                                        mmlval.str = string_buf;
                                        string_buf_ptr = string_buf;
                                        unput(',');
                                        return T_ARG;
                                }
                                return ',';
                        }
{WORD}[(]               {
                                /* May be a symbol or a macro invocation. */
                                mmlval.sym = symtable_get(mmtext);
                                if (mmlval.sym->type != MACRO) {
                                        stop("Expecting Macro Name",
                                             EX_DATAERR);
                                }
                                unput('(');
                                parren_count = 0;
                                BEGIN ARGLIST;
                                return T_SYMBOL;
                        }
.                       { 
                                snprintf(buf, sizeof(buf), "Invalid character "
                                         "'%c'", mmtext[0]);
                                stop(buf, EX_DATAERR);
                        }
%%

int
mmwrap()
{
        stop("EOF encountered in macro call", EX_DATAERR);
}