157 lines
4.1 KiB
Plaintext
157 lines
4.1 KiB
Plaintext
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%{
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/*
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* Sub-Lexical Analyzer for macro invokation in
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* the Aic7xxx SCSI Host adapter sequencer assembler.
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*
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* Copyright (c) 2001 Adaptec Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_macro_scan.l#8 $
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <regex.h>
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#include <stdio.h>
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#include <string.h>
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#include <sysexits.h>
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#ifdef __linux__
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#include "../queue.h"
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#else
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#include <sys/queue.h>
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#endif
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#include "aicasm.h"
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#include "aicasm_symbol.h"
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#include "aicasm_macro_gram.h"
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#define MAX_STR_CONST 4096
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static char string_buf[MAX_STR_CONST];
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static char *string_buf_ptr;
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static int parren_count;
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static char buf[255];
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%}
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WORD [A-Za-z_][-A-Za-z_0-9]*
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SPACE [ \t]+
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MCARG [^(), \t]+
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%x ARGLIST
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%%
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\n {
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++yylineno;
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}
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\r ;
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<ARGLIST>{SPACE} ;
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<ARGLIST>\( {
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parren_count++;
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if (parren_count == 1) {
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string_buf_ptr = string_buf;
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return ('(');
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}
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*string_buf_ptr++ = '(';
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}
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<ARGLIST>\) {
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if (parren_count == 1) {
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if (string_buf_ptr != string_buf) {
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/*
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* Return an argument and
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* rescan this parren so we
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* can return it as well.
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*/
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*string_buf_ptr = '\0';
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mmlval.str = string_buf;
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string_buf_ptr = string_buf;
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unput(')');
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return T_ARG;
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}
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BEGIN INITIAL;
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return (')');
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}
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parren_count--;
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*string_buf_ptr++ = ')';
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}
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<ARGLIST>{MCARG} {
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char *yptr;
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yptr = mmtext;
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while (*yptr)
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*string_buf_ptr++ = *yptr++;
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}
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<ARGLIST>\, {
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if (string_buf_ptr != string_buf) {
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/*
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* Return an argument and
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* rescan this comma so we
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* can return it as well.
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*/
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*string_buf_ptr = '\0';
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mmlval.str = string_buf;
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string_buf_ptr = string_buf;
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unput(',');
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return T_ARG;
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}
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return ',';
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}
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{WORD}[(] {
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/* May be a symbol or a macro invocation. */
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mmlval.sym = symtable_get(mmtext);
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if (mmlval.sym->type != MACRO) {
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stop("Expecting Macro Name",
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EX_DATAERR);
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}
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unput('(');
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parren_count = 0;
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BEGIN ARGLIST;
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return T_SYMBOL;
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}
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. {
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snprintf(buf, sizeof(buf), "Invalid character "
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"'%c'", mmtext[0]);
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stop(buf, EX_DATAERR);
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}
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%%
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int
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mmwrap()
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{
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stop("EOF encountered in macro call", EX_DATAERR);
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}
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