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  * $FreeBSD$
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
65 static char string_buf[MAX_STR_CONST];
66 static char *string_buf_ptr;
67 static int  parren_count;
68 static char buf[255];
69 int  mmlineno;
70 %}
71 
72 WORD		[A-Za-z_][-A-Za-z_0-9]*
73 SPACE		[ \t]+
74 MCARG		[^(), \t]+
75 
76 %x ARGLIST
77 
78 %%
79 \n			{
80 				++mmlineno;
81 			}
82 \r			;
83 <ARGLIST>{SPACE}	;
84 <ARGLIST>\(		{
85 				parren_count++;
86 				if (parren_count == 1) {
87 					string_buf_ptr = string_buf;
88 					return ('(');
89 				}
90 				*string_buf_ptr++ = '(';
91 			}
92 <ARGLIST>\)		{
93 				if (parren_count == 1) {
94 					if (string_buf_ptr != string_buf) {
95 						/*
96 						 * Return an argument and
97 						 * rescan this parren so we
98 						 * can return it as well.
99 						 */
100 						*string_buf_ptr = '\0';
101 						mmlval.str = string_buf;
102 						string_buf_ptr = string_buf;
103 						unput(')');
104 						return T_ARG;
105 					}
106 					BEGIN INITIAL;
107 					return (')');
108 				}
109 				parren_count--;
110 				*string_buf_ptr++ = ')';
111 			}
112 <ARGLIST>{MCARG}	{
113 				char *yptr;
114 
115 				yptr = mmtext;
116 				while (*yptr)
117 					*string_buf_ptr++ = *yptr++;
118 			}
119 <ARGLIST>\,		{
120 				if (string_buf_ptr != string_buf) {
121 					/*
122 					 * Return an argument and
123 					 * rescan this comma so we
124 					 * can return it as well.
125 					 */
126 					*string_buf_ptr = '\0';
127 					mmlval.str = string_buf;
128 					string_buf_ptr = string_buf;
129 					unput(',');
130 					return T_ARG;
131 				}
132 				return ',';
133 			}
134 {WORD}[(]		{
135 				/* May be a symbol or a macro invocation. */
136 				mmlval.sym = symtable_get(mmtext);
137 				if (mmlval.sym->type != MACRO) {
138 					stop("Expecting Macro Name",
139 					     EX_DATAERR);
140 				}
141 				unput('(');
142 				parren_count = 0;
143 				BEGIN ARGLIST;
144 				return T_SYMBOL;
145 			}
146 .			{
147 				snprintf(buf, sizeof(buf), "Invalid character "
148 					 "'%c'", mmtext[0]);
149 				stop(buf, EX_DATAERR);
150 			}
151 %%
152 
153 int
154 mmwrap()
155 {
156 	stop("EOF encountered in macro call", EX_DATAERR);
157 }
158