1 /* $OpenBSD: misc.c,v 1.27 2002/04/26 16:15:16 espie Exp $ */
2 /* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Ozan Yigit at York University.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#)misc.c 8.1 (Berkeley) 6/6/93
40 * $OpenBSD: misc.c,v 1.27 2002/04/26 16:15:16 espie Exp $
41 * $FreeBSD: src/usr.bin/m4/misc.c,v 1.5.2.4 2002/07/15 02:06:15 jmallett Exp $
42 * $DragonFly: src/usr.bin/m4/misc.c,v 1.2 2003/06/17 04:29:28 dillon Exp $
45 #include <sys/types.h>
56 #include "pathnames.h"
59 char *ep; /* first free char in strspace */
60 static char *strspace; /* string space for evaluation */
61 char *endest; /* end of string space */
62 static size_t strsize = STRSPMAX;
63 static size_t bufsize = BUFSIZE;
65 char *buf; /* push-back buffer */
66 char *bufbase; /* the base for current ilevel */
67 char *bbase[MAXINP]; /* the base for each ilevel */
68 char *bp; /* first available character */
69 char *endpbb; /* end of push-back buffer */
73 * find the index of second str in the first str.
76 indx(const char *s1, const char *s2)
87 * putback - push character back onto input
100 * pbstr - push string back onto input
101 * putback is replicated to improve
110 while ((size_t)(endpbb - bp) <= n)
117 * pbnum - convert number to string, push back on input.
124 num = (n < 0) ? -n : n;
126 putback(num % 10 + '0');
128 while ((num /= 10) > 0);
135 * pbunsigned - convert unsigned long to string, push back on input.
138 pbunsigned(unsigned long n)
141 putback(n % 10 + '0');
143 while ((n /= 10) > 0);
151 strspace = xalloc(strsize+1);
153 endest = strspace+strsize;
154 buf = (char *)xalloc(bufsize);
157 endpbb = buf + bufsize;
158 for (i = 0; i < MAXINP; i++)
163 enlarge_strspace(void)
169 newstrspace = malloc(strsize + 1);
171 errx(1, "string space overflow");
172 memcpy(newstrspace, strspace, strsize/2);
173 for (i = 0; i <= sp; i++)
175 mstack[i].sstr = (mstack[i].sstr - strspace)
177 ep = (ep-strspace) + newstrspace;
179 strspace = newstrspace;
180 endest = strspace + strsize;
184 enlarge_bufspace(void)
190 newbuf = realloc(buf, bufsize);
192 errx(1, "too many characters pushed back");
193 for (i = 0; i < MAXINP; i++)
194 bbase[i] = (bbase[i]-buf)+newbuf;
195 bp = (bp-buf)+newbuf;
196 bufbase = (bufbase-buf)+newbuf;
198 endpbb = buf+bufsize;
202 * chrsave - put single char on string space
213 * read in a diversion file, and dispose it.
220 if (active == outfile[n])
221 errx(1, "undivert: diversion still active");
223 while ((c = getc(outfile[n])) != EOF)
225 (void) fclose(outfile[n]);
230 onintr(int signo __unused)
232 #define intrmessage "m4: interrupted.\n"
233 write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1);
238 * killdiv - get rid of the diversion files
245 for (n = 0; n < maxout; n++)
246 if (outfile[n] != NULL) {
247 (void) fclose(outfile[n]);
252 * resizedivs: allocate more diversion files */
258 outfile = (FILE **)realloc(outfile, sizeof(FILE *) * n);
260 errx(1, "too many diverts %d", n);
261 for (i = maxout; i < n; i++)
277 xstrdup(const char *s)
289 "usage: m4 [-d flags] [-t name] [-gs] [-D name[=value]]...\n"
290 " [-U name]... [-I dirname]... file...\n");
295 obtain_char(struct input_file *f)
299 else if (f->c == '\n')
302 f->c = fgetc(f->file);
307 set_input(struct input_file *f, FILE *real, const char *name)
312 f->name = xstrdup(name);
316 release_input(struct input_file *f)
318 if (f->file != stdin)
322 * XXX can't free filename, as there might still be
323 * error information pointing to it.
328 doprintlineno(struct input_file *f)
330 pbunsigned(f->lineno);
334 doprintfilename(struct input_file *f)
342 * buffer_mark/dump_buffer: allows one to save a mark in a buffer,
343 * and later dump everything that was added since then to a file.
353 dump_buffer(FILE *f, size_t m)
357 for (s = bp; s - buf > (int)m;)