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#7 $
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 %}
70 
71 WORD		[A-Za-z_][-A-Za-z_0-9]*
72 SPACE		[ \t]+
73 MCARG		[^(), \t]+
74 
75 %x ARGLIST
76 
77 %%
78 \n			{
79 				++yylineno;
80 			}
81 <ARGLIST>{SPACE}	;
82 <ARGLIST>\(		{
83 				parren_count++;
84 				if (parren_count == 1) {
85 					string_buf_ptr = string_buf;
86 					return ('(');
87 				}
88 				*string_buf_ptr++ = '(';
89 			}
90 <ARGLIST>\)		{
91 				if (parren_count == 1) {
92 					if (string_buf_ptr != string_buf) {
93 						/*
94 						 * Return an argument and
95 						 * rescan this parren so we
96 						 * can return it as well.
97 						 */
98 						*string_buf_ptr = '\0';
99 						mmlval.str = string_buf;
100 						string_buf_ptr = string_buf;
101 						unput(')');
102 						return T_ARG;
103 					}
104 					BEGIN INITIAL;
105 					return (')');
106 				}
107 				parren_count--;
108 				*string_buf_ptr++ = ')';
109 			}
110 <ARGLIST>{MCARG}	{
111 				char *yptr;
112 
113 				yptr = mmtext;
114 				while (*yptr)
115 					*string_buf_ptr++ = *yptr++;
116 			}
117 <ARGLIST>\,		{
118 				if (string_buf_ptr != string_buf) {
119 					/*
120 					 * Return an argument and
121 					 * rescan this comma so we
122 					 * can return it as well.
123 					 */
124 					*string_buf_ptr = '\0';
125 					mmlval.str = string_buf;
126 					string_buf_ptr = string_buf;
127 					unput(',');
128 					return T_ARG;
129 				}
130 				return ',';
131 			}
132 {WORD}[(]		{
133 				/* May be a symbol or a macro invocation. */
134 				mmlval.sym = symtable_get(mmtext);
135 				if (mmlval.sym->type != MACRO) {
136 					stop("Expecting Macro Name",
137 					     EX_DATAERR);
138 				}
139 				unput('(');
140 				parren_count = 0;
141 				BEGIN ARGLIST;
142 				return T_SYMBOL;
143 			}
144 .			{
145 				snprintf(buf, sizeof(buf), "Invalid character "
146 					 "'%c'", mmtext[0]);
147 				stop(buf, EX_DATAERR);
148 			}
149 %%
150 
151 int
152 mmwrap()
153 {
154 	stop("EOF encountered in macro call", EX_DATAERR);
155 }
156