LLVOCache class implemented.

indra/llcommon/stringize.h

@@ -0,0 +1,107 @@
+/**
+ * @file   stringize.h
+ * @author Nat Goodspeed
+ * @date   2008-12-17
+ * @brief  stringize(item) template function and STRINGIZE(expression) macro
+ * 
+ * $LicenseInfo:firstyear=2008&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#if ! defined(LL_STRINGIZE_H)
+#define LL_STRINGIZE_H
+
+#include <sstream>
+#include <boost/lambda/lambda.hpp>
+
+/**
+ * stringize(item) encapsulates an idiom we use constantly, using
+ * operator<<(std::ostringstream&, TYPE) followed by std::ostringstream::str()
+ * to render a string expressing some item.
+ */
+template <typename T>
+std::string stringize(const T& item)
+{
+    std::ostringstream out;
+    out << item;
+    return out.str();
+}
+
+/**
+ * stringize_f(functor)
+ */
+template <typename Functor>
+std::string stringize_f(Functor const & f)
+{
+    std::ostringstream out;
+    f(out);
+    return out.str();
+}
+
+/**
+ * STRINGIZE(item1 << item2 << item3 ...) effectively expands to the
+ * following:
+ * @code
+ * std::ostringstream out;
+ * out << item1 << item2 << item3 ... ;
+ * return out.str();
+ * @endcode
+ */
+#define STRINGIZE(EXPRESSION) (stringize_f(boost::lambda::_1 << EXPRESSION))
+
+
+/**
+ * destringize(str)
+ * defined for symmetry with stringize
+ * *NOTE - this has distinct behavior from boost::lexical_cast<T> regarding
+ * leading/trailing whitespace and handling of bad_lexical_cast exceptions
+ */
+template <typename T>
+T destringize(std::string const & str)
+{
+	T val;
+    std::istringstream in(str);
+	in >> val;
+    return val;
+}
+
+/**
+ * destringize_f(str, functor)
+ */
+template <typename Functor>
+void destringize_f(std::string const & str, Functor const & f)
+{
+    std::istringstream in(str);
+    f(in);
+}
+
+/**
+ * DESTRINGIZE(str, item1 >> item2 >> item3 ...) effectively expands to the
+ * following:
+ * @code
+ * std::istringstream in(str);
+ * in >> item1 >> item2 >> item3 ... ;
+ * @endcode
+ */
+#define DESTRINGIZE(STR, EXPRESSION) (destringize_f((STR), (boost::lambda::_1 >> EXPRESSION)))
+
+
+#endif /* ! defined(LL_STRINGIZE_H) */