+/** @file tostring.h
+ *
+ * Convert object to its string representation (output form). This is an
+ * internal header file. */
+
+/*
+ * GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *
+ * 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 __GINAC_TOSTRING_H__
+#define __GINAC_TOSTRING_H__
+
+#include "config.h"
+
+#if defined(HAVE_SSTREAM)
+#include <sstream>
+#elif defined(HAVE_STRSTREAM)
+#include <strstream>
+#else
+#error Need either sstream or strstream
+#endif
+
+namespace GiNaC {
+
+// This should be obsoleted once <sstream> is widely deployed.
+template<class T>
+std::string ToString(const T & t)
+{
+#if defined(HAVE_SSTREAM)
+ std::ostringstream buf;
+ buf << t << std::ends;
+ return buf.str();
+#else
+ char buf[256];
+ std::ostrstream(buf,sizeof(buf)) << t << std::ends;
+ return buf;
+#endif
+}
+
+} // namespace GiNaC
+
+#endif // ndef __GINAC_TOSTRING_H__