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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 2002/06/30 18:25:58 smurph Exp $
*
* $FreeBSD: src/sys/dev/aic7xxx/aicasm/aicasm_macro_scan.l,v 1.1 2002/04/24 16:24:43 gibbs Exp $
*/
#include <sys/types.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <string.h>
#include <sysexits.h>
#include <sys/queue.h>
#include "aicasm.h"
#include "aicasm_symbol.h"
#include "y.tab.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);
}
|
