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// (C) Copyright Gennadiy Rozental 2005-2008.
// 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/test for the library home page.
//
// File : $RCSfile$
//
// Version : $Revision$
//
// Description : implements facility to hide input traversing details
// ***************************************************************************
#ifndef BOOST_RT_CLA_ARGV_TRAVERSER_IPP_070604GER
#define BOOST_RT_CLA_ARGV_TRAVERSER_IPP_070604GER
// Boost.Runtime.Parameter
#include <boost/test/utils/runtime/trace.hpp>
#include <boost/test/utils/runtime/cla/argv_traverser.hpp>
// STL
#include <memory>
#include <cstring>
#ifdef BOOST_NO_STDC_NAMESPACE
namespace std { using ::memcpy; }
#endif
namespace boost {
namespace BOOST_RT_PARAM_NAMESPACE {
namespace cla {
// ************************************************************************** //
// ************** runtime::cla::argv_traverser ************** //
// ************************************************************************** //
BOOST_RT_PARAM_INLINE
argv_traverser::argv_traverser()
: p_ignore_mismatch( false ), p_separator( BOOST_RT_PARAM_LITERAL( ' ' ) )
{
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::init( int argc, char_type** argv )
{
for( int index = 1; index < argc; ++index ) {
m_buffer += argv[index];
if( index != argc-1 )
m_buffer += BOOST_RT_PARAM_LITERAL( ' ' );
}
m_remainder.reset( new char_type[m_buffer.size()+1] );
m_remainder_size = 0;
m_work_buffer = m_buffer;
m_commited_end = m_work_buffer.begin();
BOOST_RT_PARAM_TRACE( "Input buffer: " << m_buffer );
next_token();
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::remainder( int& argc, char_type** argv )
{
argc = 1;
std::size_t pos = 0;
while(pos < m_remainder_size ) {
argv[argc++] = m_remainder.get() + pos;
pos = std::find( m_remainder.get() + pos, m_remainder.get() + m_remainder_size,
BOOST_RT_PARAM_LITERAL( ' ' ) ) - m_remainder.get();
m_remainder[pos++] = BOOST_RT_PARAM_LITERAL( '\0' );
}
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE cstring
argv_traverser::token() const
{
return m_token;
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::next_token()
{
if( m_work_buffer.is_empty() )
return;
m_work_buffer.trim_left( m_token.size() ); // skip remainder of current token
if( m_work_buffer.size() != m_buffer.size() ) // !! is there a better way to identify first token
m_work_buffer.trim_left( 1 ); // skip separator if not first token;
m_token.assign( m_work_buffer.begin(),
std::find( m_work_buffer.begin(), m_work_buffer.end(), p_separator ) );
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE cstring
argv_traverser::input() const
{
return m_work_buffer;
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::trim( std::size_t size )
{
m_work_buffer.trim_left( size );
if( size <= m_token.size() )
m_token.trim_left( size );
else {
m_token.assign( m_work_buffer.begin(),
std::find( m_work_buffer.begin(), m_work_buffer.end(), p_separator ) );
}
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE bool
argv_traverser::match_front( cstring str )
{
return m_work_buffer.size() < str.size() ? false : m_work_buffer.substr( 0, str.size() ) == str;
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE bool
argv_traverser::match_front( char_type c )
{
return first_char( m_work_buffer ) == c;
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE bool
argv_traverser::eoi() const
{
return m_work_buffer.is_empty();
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::commit()
{
m_commited_end = m_work_buffer.begin();
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE void
argv_traverser::rollback()
{
m_work_buffer.assign( m_commited_end, m_work_buffer.end() );
m_token.assign( m_work_buffer.begin(),
std::find( m_work_buffer.begin(), m_work_buffer.end(), p_separator ) );
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE std::size_t
argv_traverser::input_pos() const
{
return m_work_buffer.begin() - m_commited_end;
}
//____________________________________________________________________________//
BOOST_RT_PARAM_INLINE bool
argv_traverser::handle_mismatch()
{
if( !p_ignore_mismatch )
return false;
std::memcpy( m_remainder.get() + m_remainder_size, token().begin(), token().size() );
m_remainder_size += token().size();
m_remainder[m_remainder_size++] = p_separator;
next_token();
commit();
return true;
}
//____________________________________________________________________________//
} // namespace cla
} // namespace BOOST_RT_PARAM_NAMESPACE
} // namespace boost
#endif // BOOST_RT_CLA_ARGV_TRAVERSER_IPP_070604GER
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