1 files changed, 76 insertions, 0 deletions
diff --git a/lib/mystring/join.h b/lib/mystring/join.h
new file mode 100644
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--- /dev/null
+++ b/lib/mystring/join.h
@@ -0,0 +1,76 @@
+/* $Id: join.h 616 2005-08-19 20:11:01Z bruce $ */
+// Copyright (C) 2017 Bruce Guenter <bruce@untroubled.org>
+//
+// This program 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 of the License, or
+// (at your option) any later version.
+//
+// This program 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+#ifndef MYSTRING__JOIN__H__
+#define MYSTRING__JOIN__H__
+
+class mystringjoin
+{
+private:
+  const mystringjoin* prev;
+  mystringrep* rep;
+  const char* str;
+
+  mystringjoin();
+public:
+  mystringjoin(const mystringjoin& j)
+    : prev(j.prev), rep(j.rep), str(j.str)
+    {
+      rep->attach();
+    }
+  mystringjoin(const mystring& s)
+    : prev(0), rep(s.rep), str(s.rep->buf)
+    {
+      rep->attach();
+    }
+  mystringjoin(const char* s)
+    : prev(0), rep(0), str(s)
+    {
+    }
+  mystringjoin(const mystringjoin& p, const mystring& s)
+    : prev(&p), rep(s.rep), str(s.rep->buf)
+    {
+      rep->attach();
+    }
+  mystringjoin(const mystringjoin& p, const char* s)
+    : prev(&p), rep(0), str(s)
+    {
+    }
+  ~mystringjoin()
+    {
+      if(rep) rep->detach();
+    }
+  mystringrep* traverse() const;
+};
+
+inline mystring::mystring(const mystringjoin& j)
+  : rep(j.traverse())
+{
+  rep->attach();
+}
+
+inline mystringjoin operator+(const mystringjoin& a, const mystring& b)
+{
+  return mystringjoin(a, b);
+}
+
+inline mystringjoin operator+(const mystringjoin& a, const char* b)
+{
+  return mystringjoin(a, b);
+}
+
+#endif