aicasm_macro_scan.l revision 213845 
1%{
2/*-
3 * Sub-Lexical Analyzer for macro invokation in
4 * the Aic7xxx SCSI 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_scan.l#8 $
42 *
43 * $FreeBSD: head/sys/dev/aic7xxx/aicasm/aicasm_macro_scan.l 213845 2010-10-14 19:19:19Z rpaulo $
44 */
45
46#include <sys/types.h>
47
48#include <inttypes.h>
49#include <limits.h>
50#include <regex.h>
51#include <stdio.h>
52#include <string.h>
53#include <sysexits.h>
54#ifdef __linux__
55#include "../queue.h"
56#else
57#include <sys/queue.h>
58#endif
59
60#include "aicasm.h"
61#include "aicasm_symbol.h"
62#include "aicasm_macro_gram.h"
63
64#define MAX_STR_CONST 4096
65static char string_buf[MAX_STR_CONST];
66static char *string_buf_ptr;
67static int  parren_count;
68static char msgbuf[255];
69
70extern int mmlex(void);
71%}
72
73WORD		[A-Za-z_][-A-Za-z_0-9]*
74SPACE		[ \t]+
75MCARG		[^(), \t]+
76
77%x ARGLIST
78
79%%
80\n			{
81				++yylineno;
82			}
83\r			;
84<ARGLIST>{SPACE}	;
85<ARGLIST>\(		{
86				parren_count++;
87				if (parren_count == 1) {
88					string_buf_ptr = string_buf;
89					return ('(');
90				}
91				*string_buf_ptr++ = '(';
92			}
93<ARGLIST>\)		{
94				if (parren_count == 1) {
95					if (string_buf_ptr != string_buf) {
96						/*
97						 * Return an argument and
98						 * rescan this parren so we
99						 * can return it as well.
100						 */
101						*string_buf_ptr = '\0';
102						mmlval.str = string_buf;
103						string_buf_ptr = string_buf;
104						unput(')');
105						return T_ARG;
106					}
107					BEGIN INITIAL;
108					return (')');
109				}
110				parren_count--;
111				*string_buf_ptr++ = ')';
112			}
113<ARGLIST>{MCARG}	{
114				char *yptr;
115
116				yptr = mmtext;
117				while (*yptr)
118					*string_buf_ptr++ = *yptr++;
119			}
120<ARGLIST>\,		{
121				if (string_buf_ptr != string_buf) {
122					/*
123					 * Return an argument and
124					 * rescan this comma so we
125					 * can return it as well.
126					 */
127					*string_buf_ptr = '\0';
128					mmlval.str = string_buf;
129					string_buf_ptr = string_buf;
130					unput(',');
131					return T_ARG;
132				}
133				return ',';
134			}
135{WORD}[(]		{
136				/* May be a symbol or a macro invocation. */
137				mmlval.sym = symtable_get(mmtext);
138				if (mmlval.sym->type != MACRO) {
139					stop("Expecting Macro Name",
140					     EX_DATAERR);
141				}
142				unput('(');
143				parren_count = 0;
144				BEGIN ARGLIST;
145				return T_SYMBOL;
146			}
147.			{
148				snprintf(msgbuf, sizeof(msgbuf), "Invalid character "
149					 "'%c'", mmtext[0]);
150				stop(msgbuf, EX_DATAERR);
151			}
152%%
153
154int
155mmwrap(void)
156{
157	stop("EOF encountered in macro call", EX_DATAERR);
158	return (1);
159}
160