// -*- C++ -*-
//  Boost general library format ---------------------------
//  See http://www.boost.org for updates, documentation, and revision history.

//  (C) Samuel Krempp 2001
//                  krempp@crans.ens-cachan.fr
//  Permission to copy, use, modify, sell and
//  distribute this software is granted provided this copyright notice appears
//  in all copies. This software is provided "as is" without express or implied
//  warranty, and with no claim as to its suitability for any purpose.

// ideas taken from Rüdiger Loos's format class
// and Karl Nelson's ofstream

// ----------------------------------------------------------------------------
// format_implementation.hpp  Implementation of the basic_format class
// ----------------------------------------------------------------------------


#ifndef BOOST_FORMAT_IMPLEMENTATION_HPP
#define BOOST_FORMAT_IMPLEMENTATION_HPP

#include <boost/throw_exception.hpp>
#include <boost/assert.hpp>
#include <boost/format.hpp>

namespace boost {

// --------  format:: -------------------------------------------
basic_format::basic_</td></tr></table>
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<tr><td class='linenumbers'><pre><a id='n1' href='#n1'>1</a>
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</pre></td>
<td class='lines'><pre><code>Fix CVE-2019-19126:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19126
https://sourceware.org/bugzilla/show_bug.cgi?id=25204

Taken from upstream:
https://sourceware.org/git/?p=glibc.git;a=commit;h=37c90e117310728a4ad1eb998c0bbe7d79c4a398

diff --git a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
index 975cbe2..df2cdfd 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
+++ b/sysdeps/unix/sysv/linux/x86_64/64/dl-librecon.h
@@ -31,7 +31,8 @@
    environment variable, LD_PREFER_MAP_32BIT_EXEC.  */
 #define EXTRA_LD_ENVVARS \
   case 21:								  \
-    if (memcmp (envline, "PREFER_MAP_32BIT_EXEC", 21) == 0)		  \
+    if (!__libc_enable_secure						  \
+	&amp;&amp; memcmp (envline, "PREFER_MAP_32BIT_EXEC", 21) == 0)		  \
       GLRO(dl_x86_cpu_features).feature[index_arch_Prefer_MAP_32BIT_EXEC] \
 	|= bit_arch_Prefer_MAP_32BIT_EXEC;				  \
     break;
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    { 
      BOOST_ASSERT( item.pad_scheme_ & format_item_t::tabulation);
      std::streamsize  n = item.state_.width_ - res.size();
      if( n > 0 )
        res.append( n, item.state_.fill_ );
    }
    res += item.appendix_;
  }
  return res;
}

namespace io {
namespace detail {

template<class T>
basic_format&  bind_arg_body( basic_format& self, 
                                      int argN, 
                                      const T& val)
  // bind one argument to a fixed value
  // this is persistent over clear() calls, thus also over str() and <<
{
    if(self.dumped_) self.clear(); // needed, because we will modify cur_arg_..
    if(argN<1 || argN > self.num_args_) 
      {
        if( self.exceptions() & io::out_of_range_bit )
          boost::throw_exception(io::out_of_range()); // arg not in range.
        else return self;
      }
    if(self.bound_.size()==0) 
      self.bound_.assign(self.num_args_,false);
    else 
      BOOST_ASSERT( self.num_args_ == static_cast<signed int>(self.bound_.size()) );
    int o_cur_arg = self.cur_arg_;
    self.cur_arg_ = argN-1; // arrays begin at 0

    self.bound_[self.cur_arg_]=false; // if already set, we unset and re-sets..
    self.operator%(val); // put val at the right place, because cur_arg is set
    

    // Now re-position cur_arg before leaving :
    self.cur_arg_ = o_cur_arg; 
    self.bound_[argN-1]=true;
    if(self.cur_arg_ == argN-1 )
      // hum, now this arg is bound, so move to next free arg
      {
        while(self.cur_arg_ < self.num_args_ && self.bound_[self.cur_arg_])   ++self.cur_arg_;
      }
    // In any case, we either have all args, or are on a non-binded arg :
    BOOST_ASSERT( self.cur_arg_ >= self.num_args_ || ! self.bound_[self.cur_arg_]);
    return self;
}

template<class T>
basic_format&  modify_item_body( basic_format& self,
                                      int itemN, 
                                      const T& manipulator)
  // applies a manipulator to the format_item describing a given directive.
  // this is a permanent change, clear or clear_binds won't cancel that.
{
  if(itemN<1 || itemN >= static_cast<signed int>(self.items_.size() )) 
    {
      if( self.exceptions() & io::out_of_range_bit ) 
        boost::throw_exception(io::out_of_range()); // item not in range.
      else return self;
    }
  self.items_[itemN-1].ref_state_.apply_manip( manipulator );
  self.items_[itemN-1].state_ = self.items_[itemN-1].ref_state_;
  return self;
}

} // namespace detail

} // namespace io

} // namespace boost



#endif  // BOOST_FORMAT_IMPLEMENTATION_HPP