Move header, provide all template parameters, clean up code

[SVN r63042]

include/boost/io/quote_manip.hpp

@@ -0,0 +1,179 @@
+//  Copyright Beman Dawes 2010
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//--------------------------------------------------------------------------------------// 
+
+#ifndef BOOST_QUOTE_MANIP
+#define BOOST_QUOTE_MANIP
+
+#include <istream>
+#include <ostream>
+#include <string>
+#include <boost/io/ios_state.hpp>
+
+namespace boost
+{
+  namespace io
+  {
+    namespace detail { // forward declare the helpers
+      template <class Char, class Traits, class Alloc> struct quote_proxy;
+      template <class Char> struct c_str_quote_proxy;
+      template <class Char, class Traits, class Alloc> struct unquote_proxy;
+    }
+
+    //  ------------  public interface  ------------------------------------------------//
+
+    template <class Char, class Traits, class Alloc>
+      detail::quote_proxy<Char, Traits, Alloc>
+        quote(const std::basic_string<Char, Traits, Alloc>& s,
+              Char escape='\\', Char delim='\"');
+
+    template <class Char>
+      detail::c_str_quote_proxy<Char>
+        quote(const Char* s, Char escape='\\', Char delim='\"');
+
+    template <class Char, class Traits, class Alloc>
+      detail::unquote_proxy<Char, Traits, Alloc>
+        unquote(std::basic_string<Char, Traits, Alloc>& s,
+                Char escape='\\', Char delim='\"');
+
+    //  -----------  implementation details  -------------------------------------------//
+
+    namespace detail
+    {
+      //  string inserter helpers
+
+      template <class Char, class Traits, class Alloc>
+      struct quote_proxy
+      {
+        const std::basic_string<Char, Traits, Alloc>& s;
+        Char escape;
+        Char delim;
+
+        quote_proxy(const std::basic_string<Char, Traits, Alloc>& s_,
+          Char escape_, Char delim_)
+          : s(s_), escape(escape_), delim(delim_) {}
+      };
+
+      template <class Char, class Traits, class Alloc>
+      std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& os, 
+        quote_proxy<Char, Traits, Alloc>& proxy)
+      {
+        os << proxy.delim;
+        std::basic_string<Char, Traits, Alloc>::const_iterator end_it = proxy.s.end();
+        for (std::basic_string<Char, Traits, Alloc>::const_iterator it = proxy.s.begin();
+          it != end_it;
+          ++it )
+        {
+          if (*it == proxy.delim || *it == proxy.escape)
+            os << proxy.escape;
+          os << *it;
+        }
+        os << proxy.delim;
+        return os;
+      }
+
+      //  c_str inserter helpers
+
+      template <class Char>
+      struct c_str_quote_proxy
+      {
+        const Char* s;
+        Char escape;
+        Char delim;
+
+        c_str_quote_proxy(const Char* s_, Char escape_, Char delim_)
+          : s(s_), escape(escape_), delim(delim_) {}
+      };
+
+      template <class Char, class Traits>
+      std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& os, 
+        c_str_quote_proxy<Char>& proxy)
+      {
+        os << proxy.delim;
+        for (const Char* it = proxy.s;
+          *it;
+          ++it )
+        {
+          if (*it == proxy.delim || *it == proxy.escape)
+            os << proxy.escape;
+          os << *it;
+        }
+        os << proxy.delim;
+        return os;
+      }
+
+      //  string extractor helpers
+
+      template <class Char, class Traits, class Alloc>
+      struct unquote_proxy
+      {
+        std::basic_string<Char, Traits, Alloc>& s;
+        Char escape;
+        Char delim;
+
+        unquote_proxy(std::basic_string<Char, Traits, Alloc>& s_,
+          Char escape_, Char delim_)
+          : s(s_), escape(escape_), delim(delim_) {}
+      };
+
+      template <class Char, class Traits, class Alloc>
+      std::basic_istream<Char, Traits>& operator>>(std::basic_istream<Char, Traits>& is, 
+        unquote_proxy<Char, Traits, Alloc>& proxy)
+      {
+        Char c;
+        is >> c;
+        if (c != proxy.delim)
+        {
+          proxy.s = c;
+          is >> proxy.s;
+          return is;
+        }
+        proxy.s.clear();
+        {
+          boost::io::ios_flags_saver ifs(is);
+          is >> std::noskipws;
+          for (;;)
+          {
+            is >> c;
+            if (c == proxy.escape)
+              is >> c;
+            else if (c == proxy.delim)
+              break;
+            proxy.s += c;
+          }
+        }
+        return is;
+      }
+
+    }  // namespace detail
+
+    //  manipulator implementations
+
+    template <class Char, class Traits, class Alloc>
+    inline detail::quote_proxy<Char, Traits, Alloc>
+      quote(const std::basic_string<Char, Traits, Alloc>& s,  Char escape, Char delim)
+    {
+      return detail::quote_proxy<Char, Traits, Alloc>(s, escape, delim);
+    }
+
+    template <class Char>
+    inline detail::c_str_quote_proxy<Char>
+      quote(const Char* s,  Char escape, Char delim)
+    {
+      return detail::c_str_quote_proxy<Char>(s, escape, delim);
+    }
+
+    template <class Char, class Traits, class Alloc>
+    inline detail::unquote_proxy<Char, Traits, Alloc>
+      unquote(std::basic_string<Char, Traits, Alloc>& s,  Char escape, Char delim)
+    {
+      return detail::unquote_proxy<Char, Traits, Alloc>(s, escape, delim);
+    }
+
+  }  // namespace io
+}  // namespace boost
+
+#endif // BOOST_QUOTE_MANIP