1 files changed, 467 insertions, 0 deletions
diff --git a/usr.bin/m4/misc.c b/usr.bin/m4/misc.c
new file mode 100644
index 0000000..0b4f80b
--- /dev/null
+++ b/usr.bin/m4/misc.c
@@ -0,0 +1,467 @@
+/*	$OpenBSD: misc.c,v 1.47 2017/06/15 13:48:42 bcallah Exp $	*/
+/*	$NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ozan Yigit at York University.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <err.h>
+#include "mdef.h"
+#include "stdd.h"
+#include "extern.h"
+#include "pathnames.h"
+
+
+char *ep;		/* first free char in strspace */
+static char *strspace;	/* string space for evaluation */
+char *endest;		/* end of string space	       */
+static size_t strsize = STRSPMAX;
+static size_t bufsize = BUFSIZE;
+
+unsigned char *buf;			/* push-back buffer	       */
+unsigned char *bufbase;			/* the base for current ilevel */
+unsigned char *bbase[MAXINP];		/* the base for each ilevel    */
+unsigned char *bp;			/* first available character   */
+unsigned char *endpbb;			/* end of push-back buffer     */
+
+
+/*
+ * find the index of second str in the first str.
+ */
+ptrdiff_t
+indx(const char *s1, const char *s2)
+{
+	char *t;
+
+	t = strstr(s1, s2);
+	if (t == NULL)
+		return (-1);
+	else
+		return (t - s1);
+}
+/*
+ *  pushback - push character back onto input
+ */
+void
+pushback(int c)
+{
+	if (c == EOF)
+		return;
+	if (bp >= endpbb)
+		enlarge_bufspace();
+	*bp++ = c;
+}
+
+/*
+ *  pbstr - push string back onto input
+ *          pushback is replicated to improve
+ *          performance.
+ */
+void
+pbstr(const char *s)
+{
+	size_t n;
+
+	n = strlen(s);
+	while (endpbb - bp <= n)
+		enlarge_bufspace();
+	while (n > 0)
+		*bp++ = s[--n];
+}
+
+/*
+ *  pbnum - convert number to string, push back on input.
+ */
+void
+pbnum(int n)
+{
+	pbnumbase(n, 10, 0);
+}
+
+void
+pbnumbase(int n, int base, int d)
+{
+	static char digits[36] = "0123456789abcdefghijklmnopqrstuvwxyz";
+	int num;
+	int printed = 0;
+
+	if (base > 36)
+		m4errx(1, "base %d > 36: not supported.", base);
+
+	if (base < 2)
+		m4errx(1, "bad base %d for conversion.", base);
+
+	num = (n < 0) ? -n : n;
+	do {
+		pushback(digits[num % base]);
+		printed++;
+	}
+	while ((num /= base) > 0);
+
+	if (n < 0)
+		printed++;
+	while (printed++ < d)
+		pushback('0');
+
+	if (n < 0)
+		pushback('-');
+}
+
+/*
+ *  pbunsigned - convert unsigned long to string, push back on input.
+ */
+void
+pbunsigned(unsigned long n)
+{
+	do {
+		pushback(n % 10 + '0');
+	}
+	while ((n /= 10) > 0);
+}
+
+void
+initspaces()
+{
+	int i;
+
+	strspace = xalloc(strsize+1, NULL);
+	ep = strspace;
+	endest = strspace+strsize;
+	buf = xalloc(bufsize, NULL);
+	bufbase = buf;
+	bp = buf;
+	endpbb = buf + bufsize;
+	for (i = 0; i < MAXINP; i++)
+		bbase[i] = buf;
+}
+
+void
+enlarge_strspace()
+{
+	char *newstrspace;
+	int i;
+
+	strsize *= 2;
+	newstrspace = malloc(strsize + 1);
+	if (!newstrspace)
+		errx(1, "string space overflow");
+	memcpy(newstrspace, strspace, strsize/2);
+	for (i = 0; i <= sp; i++)
+		if (sstack[i] == STORAGE_STRSPACE)
+			mstack[i].sstr = (mstack[i].sstr - strspace)
+			    + newstrspace;
+	ep = (ep-strspace) + newstrspace;
+	free(strspace);
+	strspace = newstrspace;
+	endest = strspace + strsize;
+}
+
+void
+enlarge_bufspace()
+{
+	unsigned char *newbuf;
+	int i;
+
+	bufsize += bufsize/2;
+	newbuf = xrealloc(buf, bufsize, "too many characters pushed back");
+	for (i = 0; i < MAXINP; i++)
+		bbase[i] = (bbase[i]-buf)+newbuf;
+	bp = (bp-buf)+newbuf;
+	bufbase = (bufbase-buf)+newbuf;
+	buf = newbuf;
+	endpbb = buf+bufsize;
+}
+
+/*
+ *  chrsave - put single char on string space
+ */
+void
+chrsave(int c)
+{
+	if (ep >= endest)
+		enlarge_strspace();
+	*ep++ = c;
+}
+
+/*
+ * read in a diversion file, and dispose it.
+ */
+void
+getdiv(int n)
+{
+	int c;
+
+	if (active == outfile[n])
+		m4errx(1, "undivert: diversion still active.");
+	rewind(outfile[n]);
+	while ((c = getc(outfile[n])) != EOF)
+		putc(c, active);
+	(void) fclose(outfile[n]);
+	outfile[n] = NULL;
+}
+
+void
+onintr(int signo)
+{
+#define intrmessage	"m4: interrupted.\n"
+	write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1);
+	_exit(1);
+}
+
+/*
+ * killdiv - get rid of the diversion files
+ */
+void
+killdiv()
+{
+	int n;
+
+	for (n = 0; n < maxout; n++)
+		if (outfile[n] != NULL) {
+			(void) fclose(outfile[n]);
+		}
+}
+
+extern char *__progname;
+
+void
+m4errx(int eval, const char *fmt, ...)
+{
+	fprintf(stderr, "%s: ", __progname);
+	fprintf(stderr, "%s at line %lu: ", CURRENT_NAME, CURRENT_LINE);
+	if (fmt != NULL) {
+		va_list ap;
+
+		va_start(ap, fmt);
+		vfprintf(stderr, fmt, ap);
+		va_end(ap);
+	}
+	fprintf(stderr, "\n");
+	exit(eval);
+}
+
+/*
+ * resizedivs: allocate more diversion files */
+void
+resizedivs(int n)
+{
+	int i;
+
+	outfile = xreallocarray(outfile, n, sizeof(FILE *),
+	    "too many diverts %d", n);
+	for (i = maxout; i < n; i++)
+		outfile[i] = NULL;
+	maxout = n;
+}
+
+void *
+xalloc(size_t n, const char *fmt, ...)
+{
+	void *p = malloc(n);
+
+	if (p == NULL) {
+		if (fmt == NULL)
+			err(1, "malloc");
+		else {
+			va_list va;
+
+			va_start(va, fmt);
+			verr(1, fmt, va);
+			va_end(va);
+		}
+	}
+	return p;
+}
+
+void *
+xcalloc(size_t n, size_t s, const char *fmt, ...)
+{
+	void *p = calloc(n, s);
+
+	if (p == NULL) {
+		if (fmt == NULL)
+			err(1, "calloc");
+		else {
+			va_list va;
+
+			va_start(va, fmt);
+			verr(1, fmt, va);
+			va_end(va);
+		}
+	}
+	return p;
+}
+
+void *
+xrealloc(void *old, size_t n, const char *fmt, ...)
+{
+	char *p = realloc(old, n);
+
+	if (p == NULL) {
+		free(old);
+		if (fmt == NULL)
+			err(1, "realloc");
+		else {
+			va_list va;
+
+			va_start(va, fmt);
+			verr(1, fmt, va);
+			va_end(va);
+		}
+	}
+	return p;
+}
+
+void *
+xreallocarray(void *old, size_t s1, size_t s2, const char *fmt, ...)
+{
+	void *p = reallocarray(old, s1, s2);
+
+	if (p == NULL) {
+		free(old);
+		if (fmt == NULL)
+			err(1, "reallocarray");
+		else {
+			va_list va;
+
+			va_start(va, fmt);
+			verr(1, fmt, va);
+			va_end(va);
+		}
+	}
+	return p;
+}
+
+char *
+xstrdup(const char *s)
+{
+	char *p = strdup(s);
+	if (p == NULL)
+		err(1, "strdup");
+	return p;
+}
+
+void
+usage(void)
+{
+	fprintf(stderr, "usage: m4 [-EgPs] [-Dname[=value]] [-d flags] "
+			"[-I dirname] [-o filename]\n"
+			"\t[-t macro] [-Uname] [file ...]\n");
+	exit(1);
+}
+
+int
+obtain_char(struct input_file *f)
+{
+	if (f->c == EOF)
+		return EOF;
+
+	f->c = fgetc(f->file);
+	if (f->c == '\n')
+		f->lineno++;
+
+	return f->c;
+}
+
+void
+set_input(struct input_file *f, FILE *real, const char *name)
+{
+	f->file = real;
+	f->lineno = 1;
+	f->c = 0;
+	f->name = xstrdup(name);
+	emit_synchline();
+}
+
+void
+do_emit_synchline()
+{
+	fprintf(active, "#line %lu \"%s\"\n",
+	    infile[ilevel].lineno, infile[ilevel].name);
+	infile[ilevel].synch_lineno = infile[ilevel].lineno;
+}
+
+void
+release_input(struct input_file *f)
+{
+	if (ferror(f->file))
+		errx(1, "Fatal error reading from %s\n", f->name);
+	if (f->file != stdin)
+	    fclose(f->file);
+	f->c = EOF;
+	/*
+	 * XXX can't free filename, as there might still be
+	 * error information pointing to it.
+	 */
+}
+
+void
+doprintlineno(struct input_file *f)
+{
+	pbunsigned(f->lineno);
+}
+
+void
+doprintfilename(struct input_file *f)
+{
+	pbstr(rquote);
+	pbstr(f->name);
+	pbstr(lquote);
+}
+
+/*
+ * buffer_mark/dump_buffer: allows one to save a mark in a buffer,
+ * and later dump everything that was added since then to a file.
+ */
+size_t
+buffer_mark()
+{
+	return bp - buf;
+}
+
+
+void
+dump_buffer(FILE *f, size_t m)
+{
+	unsigned char *s;
+
+	for (s = bp; s-buf > m;)
+		fputc(*--s, f);
+}