Added boost header

test/external/boost/format/internals.hpp

@@ -0,0 +1,201 @@
+// ----------------------------------------------------------------------------
+// internals.hpp :  internal structs : stream_format_state, format_item. 
+//                  included by format.hpp
+// ----------------------------------------------------------------------------
+
+//  Copyright Samuel Krempp 2003. Use, modification, and distribution are
+//  subject to the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/format for library home page
+
+// ----------------------------------------------------------------------------
+
+#ifndef BOOST_FORMAT_INTERNALS_HPP
+#define BOOST_FORMAT_INTERNALS_HPP
+
+
+#include <string>
+#include <boost/assert.hpp>
+#include <boost/optional.hpp>
+#include <boost/limits.hpp>
+#include <boost/format/detail/compat_workarounds.hpp>
+#include <boost/format/alt_sstream.hpp> // used as a dummy stream
+
+namespace boost {
+namespace io {
+namespace detail {
+
+
+//---- stream_format_state --------------------------------------------------//
+
+//   set of params that define the format state of a stream
+    template<class Ch, class Tr> 
+    struct stream_format_state 
+    {
+        typedef BOOST_IO_STD basic_ios<Ch, Tr>   basic_ios;
+
+        stream_format_state(Ch fill)                 { reset(fill); }
+//        stream_format_state(const basic_ios& os)     { set_by_stream(os); }
+
+        void reset(Ch fill);                     //- sets to default state.
+        void set_by_stream(const basic_ios& os); //- sets to os's state.
+        void apply_on(basic_ios & os,            //- applies format_state to the stream
+                      boost::io::detail::locale_t * loc_default = 0) const;
+        template<class T> 
+        void apply_manip(T manipulator)          //- modifies state by applying manipulator
+            { apply_manip_body<Ch, Tr, T>( *this, manipulator) ; }
+
+        // --- data ---
+        std::streamsize width_;
+        std::streamsize precision_;
+        Ch fill_; 
+        std::ios_base::fmtflags flags_;
+        std::ios_base::iostate  rdstate_;
+        std::ios_base::iostate  exceptions_;
+        boost::optional<boost::io::detail::locale_t>  loc_;
+    };  
+
+
+//---- format_item  ---------------------------------------------------------//
+
+//   stores all parameters that can be specified in format strings
+    template<class Ch, class Tr, class Alloc>  
+    struct format_item 
+    {     
+        enum pad_values { zeropad = 1, spacepad =2, centered=4, tabulation = 8 };
+                         // 1. if zeropad is set, all other bits are not, 
+                         // 2. if tabulation is set, all others are not.
+                         // centered and spacepad can be mixed freely.
+        enum arg_values { argN_no_posit   = -1, // non-positional directive. will set argN later
+                          argN_tabulation = -2, // tabulation directive. (no argument read) 
+                          argN_ignored    = -3  // ignored directive. (no argument read)
+        };
+        typedef BOOST_IO_STD basic_ios<Ch, Tr>                    basic_ios;
+        typedef detail::stream_format_state<Ch, Tr>               stream_format_state;
+        typedef ::std::basic_string<Ch, Tr, Alloc>                string_type;
+
+        format_item(Ch fill) :argN_(argN_no_posit), fmtstate_(fill), 
+                              truncate_(max_streamsize()), pad_scheme_(0)  {}
+        void reset(Ch fill);
+        void compute_states(); // sets states  according to truncate and pad_scheme.
+
+        static std::streamsize max_streamsize() { 
+            return (std::numeric_limits<std::streamsize>::max)();
+        }
+
+        // --- data ---
+        int         argN_;  //- argument number (starts at 0,  eg : %1 => argN=0)
+                            //  negative values for items that don't process an argument
+        string_type  res_;      //- result of the formatting of this item
+        string_type  appendix_; //- piece of string between this item and the next
+
+        stream_format_state fmtstate_;// set by parsing, is only affected by modify_item
+
+        std::streamsize truncate_;//- is set for directives like %.5s that ask truncation
+        unsigned int pad_scheme_;//- several possible padding schemes can mix. see pad_values
+    }; 
+
+
+
+//--- Definitions  ------------------------------------------------------------
+
+// -   stream_format_state:: -------------------------------------------------
+    template<class Ch, class Tr>
+    void stream_format_state<Ch,Tr>:: apply_on (basic_ios & os,
+                      boost::io::detail::locale_t * loc_default) const {
+        // set the state of this stream according to our params
+        if(width_ != -1)
+            os.width(width_);
+        if(precision_ != -1)
+            os.precision(precision_);
+        if(fill_ != 0)
+            os.fill(fill_);
+        os.flags(flags_);
+        os.clear(rdstate_);
+        os.exceptions(exceptions_);
+#if !defined(BOOST_NO_STD_LOCALE)
+        if(loc_)
+            os.imbue(loc_.get());
+        else if(loc_default)
+            os.imbue(*loc_default);
+#else
+        (void) loc_default; // keep compiler quiet if we don't support locales
+#endif        
+    }
+
+    template<class Ch, class Tr>
+    void stream_format_state<Ch,Tr>:: set_by_stream(const basic_ios& os) {
+        // set our params according to the state of this stream
+        flags_ = os.flags();
+        width_ = os.width();
+        precision_ = os.precision();
+        fill_ = os.fill();
+        rdstate_ = os.rdstate();
+        exceptions_ = os.exceptions();
+    }
+
+
+    template<class Ch, class Tr, class T>
+    void apply_manip_body( stream_format_state<Ch, Tr>& self,
+                           T manipulator) {
+        // modify our params according to the manipulator
+        basic_oaltstringstream<Ch, Tr>  ss;
+        self.apply_on( ss );
+        ss << manipulator;
+        self.set_by_stream( ss );
+    }
+
+    template<class Ch, class Tr> inline
+    void stream_format_state<Ch,Tr>:: reset(Ch fill) {
+        // set our params to standard's default state.   cf 27.4.4.1 of the C++ norm
+        width_=0; precision_=6; 
+        fill_=fill; // default is widen(' '), but we cant compute it without the locale
+        flags_ = std::ios_base::dec | std::ios_base::skipws; 
+        // the adjust_field part is left equal to 0, which means right.
+        exceptions_ = std::ios_base::goodbit;
+        rdstate_ = std::ios_base::goodbit;
+    }
+
+
+// ---   format_item:: --------------------------------------------------------
+
+    template<class Ch, class Tr, class Alloc> 
+    void format_item<Ch, Tr, Alloc>:: 
+    reset (Ch fill) { 
+        argN_=argN_no_posit; truncate_ = max_streamsize(); pad_scheme_ =0; 
+        res_.resize(0); appendix_.resize(0);
+        fmtstate_.reset(fill);
+    }
+
+    template<class Ch, class Tr, class Alloc> 
+    void format_item<Ch, Tr, Alloc>:: 
+    compute_states() {
+        // reflect pad_scheme_   on  fmt_state_
+        //   because some pad_schemes has complex consequences on several state params.
+        if(pad_scheme_ & zeropad) {
+            // ignore zeropad in left alignment :
+            if(fmtstate_.flags_ & std::ios_base::left) {
+              BOOST_ASSERT(!(fmtstate_.flags_ &(std::ios_base::adjustfield ^std::ios_base::left)));
+              // only left bit might be set. (not right, nor internal)
+              pad_scheme_ = pad_scheme_ & (~zeropad); 
+            }
+            else { 
+                pad_scheme_ &= ~spacepad; // printf ignores spacepad when zeropadding
+                fmtstate_.fill_='0'; 
+                fmtstate_.flags_ = (fmtstate_.flags_ & ~std::ios_base::adjustfield) 
+                    | std::ios_base::internal;
+                // removes all adjustfield bits, and adds internal.
+            }
+        }
+        if(pad_scheme_ & spacepad) {
+            if(fmtstate_.flags_ & std::ios_base::showpos)
+                pad_scheme_ &= ~spacepad;
+        }
+    }
+
+
+} } } // namespaces boost :: io :: detail
+
+
+#endif // BOOST_FORMAT_INTERNALS_HPP