mkoptions.c revision 20458 
1/*
2 * Copyright (c) 1995  Peter Wemm
3 * Copyright (c) 1980, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef lint
36static char sccsid[] = "@(#)mkheaders.c	8.1 (Berkeley) 6/6/93";
37#endif /* not lint */
38
39/*
40 * Make all the .h files for the optional entries
41 */
42
43#include <stdio.h>
44#include <string.h>
45#include <ctype.h>
46#include "config.h"
47#include "y.tab.h"
48
49#define ns(s) strdup(s)
50
51static	char *lower __P((char *));
52
53options()
54{
55	struct opt_list *ol;
56
57	/* fake the cpu types as options */
58	/* Please forgive me for this hack.. :-) */
59	struct opt *op;
60	struct cputype *cp;
61
62	for (cp = cputype; cp; cp = cp->cpu_next) {
63		struct opt *op = (struct opt *)malloc(sizeof (struct opt));
64		memset(op, 0, sizeof(*op));
65		op->op_name = ns(cp->cpu_name);
66		op->op_value = 0;
67		op->op_next = opt;
68		opt = op;
69	}
70
71	read_options();
72	for (ol = otab; ol != 0; ol = ol->o_next)
73		do_option(ol->o_name);
74}
75
76/*
77 * Generate an <options>.h file
78 */
79
80do_option(name)
81	char *name;
82{
83	char *file, *inw, *tooption();
84	struct opt *op, *op_head, *topp;
85	FILE *inf, *outf;
86	char *value;
87	char *oldvalue;
88	int seen;
89
90	file = tooption(name);
91
92	/*
93	 * Check to see if the option was specified..
94	 */
95	value = NULL;
96	for (op = opt; op; op = op->op_next) {
97		if (eq(name, op->op_name)) {
98			value = op->op_value;
99			if (!value)
100				value = ns("1");
101			op->op_ownfile++;
102		}
103	}
104
105	inf = fopen(file, "r");
106	if (inf == 0) {
107		outf = fopen(file, "w");
108		if (outf == 0) {
109			perror(file);
110			exit(1);
111		}
112
113		/* was the option in the config file? */
114		if (value) {
115			fprintf(outf, "#define %s %s\n", name, value);
116		} /* else empty file */
117
118		(void) fclose(outf);
119		return;
120	}
121	oldvalue = NULL;
122	op_head = NULL;
123	seen = 0;
124	for (;;) {
125		char *cp;
126		char *invalue;
127
128		/* get the #define */
129		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
130			break;
131		/* get the option name */
132		if ((inw = get_word(inf)) == 0 || inw == (char *)EOF)
133			break;
134		inw = ns(inw);
135		cp = get_word(inf);
136		if (cp == 0 || cp == (char *)EOF)
137			break;
138		/* option value */
139		invalue = ns(cp); /* malloced */
140		if (eq(inw, name)) {
141			oldvalue = invalue;
142			invalue = value;
143			seen++;
144		}
145		op = (struct opt *) malloc(sizeof *op);
146		bzero(op, sizeof(*op));
147		op->op_name = inw;
148		op->op_value = invalue;
149		op->op_next = op_head;
150		op_head = op;
151
152		/* EOL? */
153		cp = get_word(inf);
154		if (cp == (char *)EOF)
155			break;
156	}
157	(void) fclose(inf);
158	if ((value == NULL && oldvalue == NULL) ||
159	    (value && oldvalue && eq(value,oldvalue))) {
160		for (op = op_head; op != NULL; op = topp) {
161			topp = op->op_next;
162			free(op->op_name);
163			free(op->op_value);
164			free(op);
165		}
166		return;
167	}
168
169	if (value && !seen) {
170		/* New option appears */
171		op = (struct opt *) malloc(sizeof *op);
172		bzero(op, sizeof(*op));
173		op->op_name = ns(name);
174		op->op_value = value ? ns(value) : NULL;
175		op->op_next = op_head;
176		op_head = op;
177	}
178
179	outf = fopen(file, "w");
180	if (outf == 0) {
181		perror(file);
182		exit(1);
183	}
184	for (op = op_head; op != NULL; op = topp) {
185		/* was the option in the config file? */
186		if (op->op_value) {
187			fprintf(outf, "#define %s %s\n",
188				op->op_name, op->op_value);
189		}
190		topp = op->op_next;
191		free(op->op_name);
192		free(op->op_value);
193		free(op);
194	}
195	(void) fclose(outf);
196}
197
198/*
199 * Find the filename to store the option spec into.
200 */
201char *
202tooption(name)
203	char *name;
204{
205	static char hbuf[80];
206	char nbuf[80];
207	struct opt_list *po;
208
209	/* "cannot happen"?  the otab list should be complete.. */
210	(void) strcpy(nbuf, "options.h");
211
212	for (po = otab ; po != 0; po = po->o_next) {
213		if (eq(po->o_name, name)) {
214			strcpy(nbuf, po->o_file);
215			break;
216		}
217	}
218
219	(void) strcpy(hbuf, path(nbuf));
220	return (hbuf);
221}
222
223/*
224 * read the options and options.<machine> files
225 */
226read_options()
227{
228	FILE *fp;
229	char fname[80];
230	char *wd, *this, *val;
231	struct opt_list *po;
232	int first = 1;
233	char genopt[80];
234
235	otab = 0;
236	(void) snprintf(fname, sizeof fname, "../../conf/options");
237openit:
238	fp = fopen(fname, "r");
239	if (fp == 0) {
240		return;
241	}
242	if(ident == NULL) {
243		printf("no ident line specified\n");
244		exit(1);
245	}
246next:
247	wd = get_word(fp);
248	if (wd == (char *)EOF) {
249		(void) fclose(fp);
250		if (first == 1) {
251			(void) snprintf(fname, sizeof fname, "options.%s", machinename);
252			first++;
253			goto openit;
254		}
255		if (first == 2) {
256			(void) snprintf(fname, sizeof fname, "options.%s", raise(ident));
257			first++;
258			fp = fopen(fname, "r");
259			if (fp != 0)
260				goto next;
261		}
262		return;
263	}
264	if (wd == 0)
265		goto next;
266	/*************************************************\
267	* If it's a comment ignore to the end of the line *
268	\*************************************************/
269	if(wd[0] == '#')
270	{
271		while( ((wd = get_word(fp)) != (char *)EOF) && wd)
272		;
273		goto next;
274	}
275	this = ns(wd);
276	val = get_word(fp);
277	if (val == (char *)EOF)
278		return;
279	if (val == 0) {
280		char *s = ns(this);
281		(void) snprintf(genopt, sizeof genopt, "opt_%s.h", lower(s));
282		val = genopt;
283		free(s);
284	}
285	val = ns(val);
286
287	for (po = otab ; po != 0; po = po->o_next) {
288		if (eq(po->o_name, this)) {
289			printf("%s: Duplicate option %s.\n",
290			       fname, this);
291			exit(1);
292		}
293	}
294
295	po = (struct opt_list *) malloc(sizeof *po);
296	bzero(po, sizeof(*po));
297	po->o_name = this;
298	po->o_file = val;
299	po->o_next = otab;
300	otab = po;
301
302	goto next;
303}
304
305static char *
306lower(str)
307	register char *str;
308{
309	register char *cp = str;
310
311	while (*str) {
312		if (isupper(*str))
313			*str = tolower(*str);
314		str++;
315	}
316	return (cp);
317}
318
319