1 %{
2 /*-
3  * Sub-Lexical Analyzer for macro invokation in
4  * the Aic7xxx SCSI Host adapter sequencer assembler.
5  *
6  * SPDX-License-Identifier: BSD-3-Clause
7  *
8  * Copyright (c) 2001 Adaptec Inc.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  *
43  * $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_macro_scan.l#8 $
44  *
45  * $FreeBSD$
46  */
47 
48 #include <sys/types.h>
49 
50 #include <inttypes.h>
51 #include <limits.h>
52 #include <regex.h>
53 #include <stdio.h>
54 #include <string.h>
55 #include <sysexits.h>
56 #include <sys/queue.h>
57 
58 #include "aicasm.h"
59 #include "aicasm_symbol.h"
60 #include "aicasm_macro_gram.h"
61 
62 #define MAX_STR_CONST 4096
63 static char string_buf[MAX_STR_CONST];
64 static char *string_buf_ptr;
65 static int  parren_count;
66 static char msgbuf[255];
67 
68 extern int mmlex(void);
69 %}
70 
71 %option noinput
72 
73 WORD		[A-Za-z_][-A-Za-z_0-9]*
74 SPACE		[ \t]+
75 MCARG		[^(), \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 
154 int
155 mmwrap(void)
156 {
157 	stop("EOF encountered in macro call", EX_DATAERR);
158 	return (1);
159 }
160