106 lines
2.9 KiB
Plaintext
106 lines
2.9 KiB
Plaintext
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// (C) Copyright Gennadiy Rozental 2001.
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// Use, modification, and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/test for the library home page.
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//
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// File : $RCSfile$
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//
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// Version : $Revision$
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//
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// Description : defines facility to hide input traversing details
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// ***************************************************************************
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#ifndef BOOST_TEST_UTILS_RUNTIME_CLA_ARGV_TRAVERSER_HPP
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#define BOOST_TEST_UTILS_RUNTIME_CLA_ARGV_TRAVERSER_HPP
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// Boost.Test Runtime parameters
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#include <boost/test/utils/runtime/fwd.hpp>
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#include <boost/test/detail/suppress_warnings.hpp>
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namespace boost {
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namespace runtime {
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namespace cla {
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// ************************************************************************** //
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// ************** runtime::cla::argv_traverser ************** //
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// ************************************************************************** //
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class argv_traverser {
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typedef char const** argv_type;
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public:
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/// Constructs traverser based on argc/argv pair
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/// argv is taken "by reference" and later can be
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/// updated in remainder method
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argv_traverser( int argc, argv_type argv )
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: m_argc( argc )
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, m_curr_token( 0 )
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, m_token_size( 0 )
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, m_argv( argv )
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{
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// save program name
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save_token();
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}
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/// Returns new argc
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int remainder()
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{
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return m_argc;
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}
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/// Returns true, if we reached end on input
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bool eoi() const
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{
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return m_curr_token == m_argc;
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}
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/// Returns current token in the input
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cstring current_token()
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{
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if( eoi() )
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return cstring();
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return cstring( m_argv[m_curr_token], m_token_size );
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}
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/// Saves current token for remainder
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void save_token()
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{
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++m_curr_token;
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if( !eoi() )
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m_token_size = ::strlen( m_argv[m_curr_token] );
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}
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/// Commit current token and iterate to next one
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void next_token()
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{
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if( !eoi() ) {
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for( std::size_t i = m_curr_token; i < m_argc-1; ++i )
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m_argv[i] = m_argv[i + 1];
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--m_argc;
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m_token_size = ::strlen( m_argv[m_curr_token] );
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}
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}
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private:
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// Data members
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std::size_t m_argc; // total number of arguments
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std::size_t m_curr_token; // current token index in argv
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std::size_t m_token_size; // current token size
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argv_type m_argv; // all arguments
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};
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} // namespace cla
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} // namespace runtime
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} // namespace boost
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#include <boost/test/detail/enable_warnings.hpp>
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#endif // BOOST_TEST_UTILS_RUNTIME_CLA_ARGV_TRAVERSER_HPP
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