1 files changed, 74 insertions, 0 deletions
diff --git a/src/include/cset.h b/src/include/cset.h
new file mode 100644
index 0000000..996e9a8
--- /dev/null
+++ b/src/include/cset.h
@@ -0,0 +1,74 @@
+// -*- C++ -*-
+/* Copyright (C) 1989-2020 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 3 of the License, 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 this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CC_LIMITS_H
+#include <limits.h>
+#else /* not HAVE_CC_LIMITS_H */
+#ifndef UCHAR_MAX
+#define UCHAR_MAX 255
+#endif
+#endif /* not HAVE_CC_LIMITS_H */ 
+
+enum cset_builtin { CSET_BUILTIN };
+
+class cset {
+public:
+  cset();
+  cset(cset_builtin);
+  cset(const char *);
+  cset(const unsigned char *);
+  int operator()(unsigned char) const;
+
+  cset &operator|=(const cset &);
+  cset &operator|=(unsigned char);
+
+  friend class cset_init;
+private:
+  char v[UCHAR_MAX+1];
+  void clear();
+};
+
+inline int cset::operator()(unsigned char c) const
+{
+  return v[c];
+}
+
+inline cset &cset::operator|=(unsigned char c)
+{
+  v[c] = 1;
+  return *this;
+}
+
+extern cset csalpha;
+extern cset csupper;
+extern cset cslower;
+extern cset csdigit;
+extern cset csxdigit;
+extern cset csspace;
+extern cset cspunct;
+extern cset csalnum;
+extern cset csprint;
+extern cset csgraph;
+extern cset cscntrl;
+
+static class cset_init {
+  static int initialised;
+public:
+  cset_init();
+} _cset_init;