aicasm_macro_scan.l revision 224046 
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 224046 2011-07-15 00:36:47Z emaste $
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#include <sys/queue.h>
55
56#include "aicasm.h"
57#include "aicasm_symbol.h"
58#include "aicasm_macro_gram.h"
59
60#define MAX_STR_CONST 4096
61static char string_buf[MAX_STR_CONST];
62static char *string_buf_ptr;
63static int  parren_count;
64static char msgbuf[255];
65
66extern int mmlex(void);
67%}
68
69WORD		[A-Za-z_][-A-Za-z_0-9]*
70SPACE		[ \t]+
71MCARG		[^(), \t]+
72
73%x ARGLIST
74
75%%
76\n			{
77				++yylineno;
78			}
79\r			;
80<ARGLIST>{SPACE}	;
81<ARGLIST>\(		{
82				parren_count++;
83				if (parren_count == 1) {
84					string_buf_ptr = string_buf;
85					return ('(');
86				}
87				*string_buf_ptr++ = '(';
88			}
89<ARGLIST>\)		{
90				if (parren_count == 1) {
91					if (string_buf_ptr != string_buf) {
92						/*
93						 * Return an argument and
94						 * rescan this parren so we
95						 * can return it as well.
96						 */
97						*string_buf_ptr = '\0';
98						mmlval.str = string_buf;
99						string_buf_ptr = string_buf;
100						unput(')');
101						return T_ARG;
102					}
103					BEGIN INITIAL;
104					return (')');
105				}
106				parren_count--;
107				*string_buf_ptr++ = ')';
108			}
109<ARGLIST>{MCARG}	{
110				char *yptr;
111
112				yptr = mmtext;
113				while (*yptr)
114					*string_buf_ptr++ = *yptr++;
115			}
116<ARGLIST>\,		{
117				if (string_buf_ptr != string_buf) {
118					/*
119					 * Return an argument and
120					 * rescan this comma so we
121					 * can return it as well.
122					 */
123					*string_buf_ptr = '\0';
124					mmlval.str = string_buf;
125					string_buf_ptr = string_buf;
126					unput(',');
127					return T_ARG;
128				}
129				return ',';
130			}
131{WORD}[(]		{
132				/* May be a symbol or a macro invocation. */
133				mmlval.sym = symtable_get(mmtext);
134				if (mmlval.sym->type != MACRO) {
135					stop("Expecting Macro Name",
136					     EX_DATAERR);
137				}
138				unput('(');
139				parren_count = 0;
140				BEGIN ARGLIST;
141				return T_SYMBOL;
142			}
143.			{
144				snprintf(msgbuf, sizeof(msgbuf), "Invalid character "
145					 "'%c'", mmtext[0]);
146				stop(msgbuf, EX_DATAERR);
147			}
148%%
149
150int
151mmwrap(void)
152{
153	stop("EOF encountered in macro call", EX_DATAERR);
154	return (1);
155}
156