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368 lines
12 KiB
368 lines
12 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: stlsoft/system/commandline_parser.hpp (originally MLCmdArg.h, ::SynesisStd)
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*
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* Purpose: commandline_parser class.
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*
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* Created: 20th May 2000
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* Updated: 10th August 2009
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 2000-2009, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////// */
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/** \file stlsoft/system/commandline_parser.hpp
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*
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* \brief [C++ only] Definition of the stlsoft::basic_commandline_parser
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* class template
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* (\ref group__library__system "System" Library).
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*/
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#ifndef STLSOFT_INCL_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER
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#define STLSOFT_INCL_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define STLSOFT_VER_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER_MAJOR 2
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# define STLSOFT_VER_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER_MINOR 1
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# define STLSOFT_VER_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER_REVISION 3
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# define STLSOFT_VER_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER_EDIT 37
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Compatibility
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*/
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/*
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[Incompatibilies-start]
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STLSOFT_COMPILER_IS_MSVC: _MSC_VER<1200
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[Incompatibilies-end]
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*/
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
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# include <stlsoft/stlsoft.h>
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#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */
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#if defined(STLSOFT_COMPILER_IS_MSVC) && \
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_MSC_VER < 1200
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# error stlsoft/system/commandline_parser.hpp is not compatible with Visual C++ 5.0 or earlier
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#endif /* compiler */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_FEATURES
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# include <stlsoft/memory/allocator_features.hpp> // for STLSOFT_CF_ALLOCATOR_REBIND_SUPPORT
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_FEATURES */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_SELECTOR
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# include <stlsoft/memory/allocator_selector.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_SELECTOR */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER
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# include <stlsoft/memory/auto_buffer.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER */
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#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_TRAITS
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# include <stlsoft/string/char_traits.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_TRAITS */
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#ifndef STLSOFT_INCL_STLSOFT_SHIMS_ACCESS_HPP_STRING
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# include <stlsoft/shims/access/string.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_SHIMS_ACCESS_HPP_STRING */
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#ifndef STLSOFT_INCL_H_CTYPE
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# define STLSOFT_INCL_H_CTYPE
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# include <ctype.h> // for isspace()
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#endif /* !STLSOFT_INCL_H_CTYPE */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft
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{
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Classes
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*/
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/** \brief Parses a command line into parts, and provides sequence semantics
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* for their access.
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*
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\code
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stlsoft::commandline_parser_a cp("abc \"d e f\" ghi);
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assert(3 == cp.size());
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assert(0 == ::strcmp("abc", cp[0]));
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assert(0 == ::strcmp("d e f", cp[1]));
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assert(0 == ::strcmp("ghi", cp[2]));
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std::copy(cp.begin(), cp.end()
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, std::ostream_iterator<char const*>(std::cout, "\n"));
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\endcode
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*
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* \ingroup group__library__system
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k T = stlsoft_ns_qual(stlsoft_char_traits)<C>
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, ss_typename_param_k A = ss_typename_type_def_k allocator_selector<C>::allocator_type
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>
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class basic_commandline_parser
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{
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/// \name Member Types
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/// @{
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public:
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/// \brief The character type
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typedef C char_type;
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/// \brief The traits type
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typedef T traits_type;
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/// \brief The traits type
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typedef A allocator_type;
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/// \brief The current instantiation of the type
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typedef basic_commandline_parser<C, T, A> class_type;
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private:
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typedef char_type* pointer_type;
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#ifdef STLSOFT_LF_ALLOCATOR_REBIND_SUPPORT
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typedef ss_typename_type_k A::ss_template_qual_k rebind<pointer_type>::other pointers_allocator_type;
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#else /* ? STLSOFT_LF_ALLOCATOR_REBIND_SUPPORT */
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typedef ss_typename_type_k allocator_selector<pointer_type>::allocator_type pointers_allocator_type;
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#endif /* STLSOFT_LF_ALLOCATOR_REBIND_SUPPORT */
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typedef stlsoft_ns_qual(auto_buffer)< char_type
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, 256
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, allocator_type
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> buffer_type;
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typedef stlsoft_ns_qual(auto_buffer)< pointer_type
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, 20
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, pointers_allocator_type
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> pointers_type;
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typedef ss_typename_type_k buffer_type::iterator iterator;
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public:
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/// \brief The value type
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typedef ss_typename_type_k pointers_type::value_type value_type;
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/// \brief The non-mutating (const) iterator type
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typedef ss_typename_type_k pointers_type::const_iterator const_iterator;
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/// \brief The size type
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typedef ss_size_t size_type;
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/// @}
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/// \name Construction
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/// @{
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public:
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/** \brief Parses the given command-line and creates an internal array
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* of pointers to the arguments.
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*/
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ss_explicit_k basic_commandline_parser(char_type const* cmdLine)
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: m_buffer(1 + stlsoft_ns_qual(c_str_len)(cmdLine))
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, m_pointers(0)
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{
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STLSOFT_ASSERT(NULL != cmdLine);
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traits_type::copy(&m_buffer[0], cmdLine, m_buffer.size());
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// Here's the algorithm:
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//
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// Walk the string, mindful of quotes, remembering the start of an
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// argument, and writing the nul-character into spaces.
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enum state_t
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{
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argument
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, quotedArgumentStart
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, quotedArgument
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, space
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};
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state_t state = space;
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iterator b = m_buffer.begin();
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const iterator e = m_buffer.end() - 1;
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for(; b != e; ++b)
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{
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const char_type ch = *b;
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STLSOFT_ASSERT('\0' != ch);
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if('"' == ch)
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{
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if(quotedArgumentStart == state)
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{
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state = space;
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}
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else if(quotedArgument == state)
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{
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*b = '\0';
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state = space;
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}
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else if(space == state)
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{
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state = quotedArgumentStart;
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}
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else
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{
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}
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}
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else if(isspace(ch))
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{
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if(quotedArgumentStart == state)
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{
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state = quotedArgument;
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add_pointer(&*b);
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}
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else if(quotedArgument == state)
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{
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}
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else if(space == state)
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{
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}
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else
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{
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STLSOFT_ASSERT(argument == state);
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*b = '\0';
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state = space;
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}
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}
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else
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{
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if(quotedArgumentStart == state)
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{
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state = quotedArgument;
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add_pointer(&*b);
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}
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else if(space == state)
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{
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state = argument;
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add_pointer(&*b);
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}
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}
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}
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}
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/// @}
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/// \name Accessors
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/// @{
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public:
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/// \brief The number of arguments
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size_type size() const
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{
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return m_pointers.size();
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}
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/** \brief Returns a non-mutating (const) pointer to each argument
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* string.
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*
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* \param index The index of the argument
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*
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* \note The behaviour is undefined if <code>index</code> is not less
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* than <code>size()</code>.
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*/
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value_type const& operator [](size_type index) const
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{
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STLSOFT_ASSERT(index < size());
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return m_pointers[index];
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}
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/// @}
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/// \name Iteration
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/// @{
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public:
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/// \brief An iterator representing the start of the sequence
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const_iterator begin() const
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{
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return m_pointers.begin();
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}
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/// \brief An iterator representing the end of the sequence
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const_iterator end() const
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{
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return m_pointers.end();
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}
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/// @}
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/// \name Implementation
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/// @{
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private:
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ss_bool_t add_pointer(pointer_type p)
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{
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if(!m_pointers.resize(1 + m_pointers.size()))
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{
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return false;
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}
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m_pointers[m_pointers.size() - 1] = p;
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return true;
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}
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/// @}
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/// \name Members
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/// @{
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private:
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buffer_type m_buffer;
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pointers_type m_pointers;
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/// @}
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};
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/* /////////////////////////////////////////////////////////////////////////
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* Typedefs for commonly encountered types
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*/
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/** \brief Specialisation of the basic_commandline_parser template for the ANSI character type \c char
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*
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* \ingroup group__library__system
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*/
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typedef basic_commandline_parser<ss_char_a_t> commandline_parser_a;
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/** \brief Specialisation of the basic_commandline_parser template for the Unicode character type \c wchar_t
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*
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* \ingroup group__library__system
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*/
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typedef basic_commandline_parser<ss_char_w_t> commandline_parser_w;
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////////////////////////////////////////////////////////////////////////////
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// Unit-testing
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#ifdef STLSOFT_UNITTEST
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# include "./unittest/commandline_parser_unittest_.h"
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#endif /* STLSOFT_UNITTEST */
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/* ////////////////////////////////////////////////////////////////////// */
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#ifndef _STLSOFT_NO_NAMESPACE
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} // namespace stlsoft
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !STLSOFT_INCL_STLSOFT_SYSTEM_HPP_COMMANDLINE_PARSER */
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/* ///////////////////////////// end of file //////////////////////////// */
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