--- /dev/null
+.\" $NetBSD: fpr.1,v 1.12 2012/03/22 07:58:18 wiz Exp $
+.\"
+.\" Copyright (c) 1989, 1990, 1993
+.\" The Regents of the University of California. All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" Robert Corbett.
+.\" 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.
+.\"
+.\" @(#)fpr.1 8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt FPR 1
+.Os
+.Sh NAME
+.Nm fpr
+.Nd print Fortran file
+.Sh SYNOPSIS
+.Nm
+.Sh DESCRIPTION
+.Nm
+is a filter that transforms files formatted according to
+Fortran's carriage control conventions into files formatted
+according to
+.Ux
+line printer conventions.
+.Pp
+.Nm
+copies its input onto its output, replacing the carriage
+control characters with characters that will produce the intended
+effects when printed using
+.Xr lpr 1 .
+The first character of each line determines the vertical spacing as follows:
+.Bd -ragged -offset indent -compact
+.Bl -column Blank "To first line of next page"
+.It Blank One line
+.It 0 Two lines
+.It 1 To first line of next page
+.It + \&No advance
+.El
+.Ed
+.Pp
+A blank line is treated as if its first character is a blank.
+A blank that appears as a carriage control character is deleted.
+A zero is changed to a newline.
+A one is changed to a form feed.
+The effects of a
+.Sq +
+are simulated using backspaces.
+.Sh EXAMPLES
+.Dl a.out \&| fpr \&| lpr
+.Pp
+.Dl fpr \*[Lt] f77.output \&| lpr
+.Sh HISTORY
+The
+.Nm
+command
+appeared in
+.Bx 4.2 .
+.Sh BUGS
+Results are undefined for input lines longer than 170 characters.
--- /dev/null
+/* $NetBSD: fpr.c,v 1.9 2011/09/04 20:26:17 joerg 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
+ * Robert Corbett.
+ *
+ * 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/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
+ The Regents of the University of California. All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)fpr.c 8.1 (Berkeley) 6/6/93";
+#endif
+__RCSID("$NetBSD: fpr.c,v 1.9 2011/09/04 20:26:17 joerg Exp $");
+#endif /* not lint */
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define BLANK ' '
+#define TAB '\t'
+#define NUL '\000'
+#define FF '\f'
+#define BS '\b'
+#define CR '\r'
+#define VTAB '\013'
+#define EOL '\n'
+
+#define TRUE 1
+#define FALSE 0
+
+#define MAXCOL 170
+#define TABSIZE 8
+#define INITWIDTH 8
+
+typedef
+struct column {
+ int count;
+ int width;
+ char *str;
+}
+ COLUMN;
+
+static char cc;
+static char saved;
+static int length;
+static char *text;
+static int highcol;
+static COLUMN *line;
+static int maxpos;
+static int maxcol;
+
+static void flush(void);
+static void get_text(void);
+static void init(void);
+__dead static void nospace(void);
+static void savech(int);
+
+int
+main(int argc, char **argv)
+{
+ int ch;
+ char ateof;
+ int i;
+ int errorcount;
+
+ init();
+ errorcount = 0;
+ ateof = FALSE;
+
+ switch (ch = getchar()) {
+ case EOF:
+ exit(0);
+ case EOL:
+ cc = NUL;
+ ungetc((int) EOL, stdin);
+ break;
+ case BLANK:
+ cc = NUL;
+ break;
+ case '1':
+ cc = FF;
+ break;
+ case '0':
+ cc = EOL;
+ break;
+ case '+':
+ cc = CR;
+ break;
+ default:
+ errorcount = 1;
+ cc = NUL;
+ ungetc(ch, stdin);
+ break;
+ }
+
+ while (!ateof) {
+ get_text();
+ switch (ch = getchar()) {
+ case EOF:
+ flush();
+ ateof = TRUE;
+ break;
+ case EOL:
+ flush();
+ cc = NUL;
+ ungetc((int) EOL, stdin);
+ break;
+ case BLANK:
+ flush();
+ cc = NUL;
+ break;
+ case '1':
+ flush();
+ cc = FF;
+ break;
+ case '0':
+ flush();
+ cc = EOL;
+ break;
+ case '+':
+ for (i = 0; i < length; i++)
+ savech(i);
+ break;
+ default:
+ errorcount++;
+ flush();
+ cc = NUL;
+ ungetc(ch, stdin);
+ break;
+ }
+ }
+
+ if (errorcount)
+ fprintf(stderr, "Illegal carriage control - %d line%s.\n",
+ errorcount, errorcount == 1 ? "" : "s");
+
+ exit(0);
+}
+
+static void
+init(void)
+{
+ COLUMN *cp;
+ COLUMN *cend;
+ char *sp;
+
+ length = 0;
+ maxpos = MAXCOL;
+ sp = malloc((unsigned) maxpos);
+ if (sp == NULL)
+ nospace();
+ text = sp;
+
+ highcol = -1;
+ maxcol = MAXCOL;
+ line = calloc(maxcol, sizeof(COLUMN));
+ if (line == NULL)
+ nospace();
+ cp = line;
+ cend = line + (maxcol - 1);
+ while (cp <= cend) {
+ cp->width = INITWIDTH;
+ sp = calloc(INITWIDTH, sizeof(char));
+ if (sp == NULL)
+ nospace();
+ cp->str = sp;
+ cp++;
+ }
+}
+
+static void
+get_text(void)
+{
+ int i;
+ char ateol;
+ int ch;
+ int pos;
+ char *n;
+
+ i = 0;
+ ateol = FALSE;
+
+ while (!ateol) {
+ switch (ch = getchar()) {
+ case EOL:
+ case EOF:
+ ateol = TRUE;
+ break;
+ case TAB:
+ pos = (1 + i / TABSIZE) * TABSIZE;
+ if (pos > maxpos) {
+ n = realloc(text, (unsigned)(pos + 10));
+ if (n == NULL)
+ nospace();
+ text = n;
+ maxpos = pos + 10;
+ }
+ while (i < pos) {
+ text[i] = BLANK;
+ i++;
+ }
+ break;
+ case BS:
+ if (i > 0) {
+ i--;
+ savech(i);
+ }
+ break;
+ case CR:
+ while (i > 0) {
+ i--;
+ savech(i);
+ }
+ break;
+ case FF:
+ case VTAB:
+ flush();
+ cc = ch;
+ i = 0;
+ break;
+ default:
+ if (i >= maxpos) {
+ n = realloc(text, (unsigned)(i + 10));
+ if (n == NULL)
+ nospace();
+ maxpos = i + 10;
+ }
+ text[i] = ch;
+ i++;
+ break;
+ }
+ }
+
+ length = i;
+}
+
+static void
+savech(int col)
+{
+ char ch;
+ int oldmax;
+ COLUMN *cp;
+ COLUMN *cend;
+ char *sp;
+ int newcount;
+ COLUMN *newline;
+
+ ch = text[col];
+ if (ch == BLANK)
+ return;
+
+ saved = TRUE;
+
+ if (col >= highcol)
+ highcol = col;
+
+ if (col >= maxcol) {
+ newline = realloc(line, (unsigned) (col + 10) * sizeof(COLUMN));
+ if (newline == NULL)
+ nospace();
+ line = newline;
+ oldmax = maxcol;
+ maxcol = col + 10;
+ cp = line + oldmax;
+ cend = line + (maxcol - 1);
+ while (cp <= cend) {
+ cp->width = INITWIDTH;
+ cp->count = 0;
+ sp = calloc(INITWIDTH, sizeof(char));
+ if (sp == NULL)
+ nospace();
+ cp->str = sp;
+ cp++;
+ }
+ }
+ cp = line + col;
+ newcount = cp->count + 1;
+ if (newcount > cp->width) {
+ cp->width = newcount;
+ sp = realloc(cp->str, (unsigned) newcount * sizeof(char));
+ if (sp == NULL)
+ nospace();
+ cp->str = sp;
+ }
+ cp->count = newcount;
+ cp->str[newcount - 1] = ch;
+}
+
+static void
+flush(void)
+{
+ int i;
+ int anchor;
+ int height;
+ int j;
+
+ if (cc != NUL)
+ putchar(cc);
+
+ if (!saved) {
+ i = length;
+ while (i > 0 && text[i - 1] == BLANK)
+ i--;
+ length = i;
+ for (i = 0; i < length; i++)
+ putchar(text[i]);
+ putchar(EOL);
+ return;
+ }
+ for (i = 0; i < length; i++)
+ savech(i);
+
+ anchor = 0;
+ while (anchor <= highcol) {
+ height = line[anchor].count;
+ if (height == 0) {
+ putchar(BLANK);
+ anchor++;
+ } else if (height == 1) {
+ putchar(*(line[anchor].str));
+ line[anchor].count = 0;
+ anchor++;
+ } else {
+ i = anchor;
+ while (i < highcol && line[i + 1].count > 1)
+ i++;
+ for (j = anchor; j <= i; j++) {
+ height = line[j].count - 1;
+ putchar(line[j].str[height]);
+ line[j].count = height;
+ }
+ for (j = anchor; j <= i; j++)
+ putchar(BS);
+ }
+ }
+
+ putchar(EOL);
+ highcol = -1;
+}
+
+static void
+nospace(void)
+{
+ errx(1, "Storage limit exceeded.");
+}