1 files changed, 62 insertions, 0 deletions
diff --git a/gnu/usr.bin/groff/libgroff/lf.cc b/gnu/usr.bin/groff/libgroff/lf.cc
new file mode 100644
index 00000000000..34272c7d03d
--- /dev/null
+++ b/gnu/usr.bin/groff/libgroff/lf.cc
@@ -0,0 +1,62 @@
+// -*- C++ -*-
+/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License along
+with groff; see the file COPYING.  If not, write to the Free Software
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include <string.h>
+#include <ctype.h>
+#include "cset.h"
+#include "stringclass.h"
+
+extern void change_filename(const char *);
+extern void change_lineno(int);
+
+int interpret_lf_args(const char *p)
+{
+  while (*p == ' ')
+    p++;
+  if (!csdigit(*p))
+    return 0;
+  int ln = 0;
+  do {
+    ln *= 10;
+    ln += *p++ - '0';
+  } while (csdigit(*p));
+  if (*p != ' ' && *p != '\n' && *p != '\0')
+    return 0;
+  while (*p == ' ')
+    p++;
+  if (*p == '\0' || *p == '\n')  {
+    change_lineno(ln);
+    return 1;
+  }
+  const char *q;
+  for (q = p;
+       *q != '\0' && *q != ' ' && *q != '\n' && *q != '\\';
+       q++)
+    ;
+  string tem(p, q - p);
+  while (*q == ' ')
+    q++;
+  if (*q != '\n' && *q != '\0')
+    return 0;
+  tem += '\0';
+  change_filename(tem.contents());
+  change_lineno(ln);
+  return 1;
+}