1 %{
2 /*
3  * Sub-parser for macro invocation in the Aic7xxx SCSI
4  * 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_gram.y#5 $
42  *
43  * $FreeBSD$
44  */
45 
46 #include <sys/types.h>
47 
48 #include <inttypes.h>
49 #include <regex.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <sysexits.h>
54 
55 #include "../queue.h"
56 
57 #include "aicasm.h"
58 #include "aicasm_symbol.h"
59 #include "aicasm_insformat.h"
60 
61 static symbol_t *macro_symbol;
62 
63 static void add_macro_arg(const char *argtext, int position);
64 void mmerror(const char *string);
65 
66 %}
67 
68 %union {
69 	int		value;
70 	char		*str;
71 	symbol_t	*sym;
72 }
73 
74 
75 %token <str> T_ARG
76 
77 %token <sym> T_SYMBOL
78 
79 %type <value> macro_arglist
80 
81 %%
82 
83 macrocall:
84 	T_SYMBOL '('
85 	{
86 		macro_symbol = $1;
87 	}
88 	macro_arglist ')'
89 	{
90 		if (macro_symbol->info.macroinfo->narg != $4) {
91 			printf("Narg == %d", macro_symbol->info.macroinfo->narg);
92 			stop("Too few arguments for macro invocation",
93 			     EX_DATAERR);
94 			/* NOTREACHED */
95 		}
96 		macro_symbol = NULL;
97 		YYACCEPT;
98 	}
99 ;
100 
101 macro_arglist:
102 	{
103 		/* Macros can take 0 arguments */
104 		$$ = 0;
105 	}
106 |	T_ARG
107 	{
108 		$$ = 1;
109 		add_macro_arg($1, 1);
110 	}
111 |	macro_arglist ',' T_ARG
112 	{
113 		if ($1 == 0) {
114 			stop("Comma without preceding argument in arg list",
115 			     EX_DATAERR);
116 			/* NOTREACHED */
117 		}
118 		$$ = $1 + 1;
119 		add_macro_arg($3, $$);
120 	}
121 ;
122 
123 %%
124 
125 static void
126 add_macro_arg(const char *argtext, int argnum)
127 {
128 	struct macro_arg *marg;
129 	int i;
130 
131 	if (macro_symbol == NULL || macro_symbol->type != MACRO) {
132 		stop("Invalid current symbol for adding macro arg",
133 		     EX_SOFTWARE);
134 		/* NOTREACHED */
135 	}
136 	/*
137 	 * Macro Invocation.  Find the appropriate argument and fill
138 	 * in the replace ment text for this call.
139 	 */
140 	i = 0;
141 	STAILQ_FOREACH(marg, &macro_symbol->info.macroinfo->args, links) {
142 		i++;
143 		if (i == argnum)
144 			break;
145 	}
146 	if (marg == NULL) {
147 		stop("Too many arguments for macro invocation", EX_DATAERR);
148 		/* NOTREACHED */
149 	}
150 	marg->replacement_text = strdup(argtext);
151 	if (marg->replacement_text == NULL) {
152 		stop("Unable to replicate replacement text", EX_SOFTWARE);
153 		/* NOTREACHED */
154 	}
155 }
156 
157 void
mmerror(const char * string)158 mmerror(const char *string)
159 {
160 	stop(string, EX_DATAERR);
161 }
162