1041 lines
18 KiB
C++
1041 lines
18 KiB
C++
/*
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* This file is a part of EZC -- Easy templating in C++ library
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* and is distributed under the BSD 3-Clause licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2007-2016, Tomasz Sowa
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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,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from 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
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "patternparser.h"
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#ifdef EZC_USE_WINIX_LOGGER
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#include "core/log.h"
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#endif
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namespace Ezc
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{
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PatternParser::PatternParser()
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{
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allow_include = true;
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pblocks = 0;
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include_level_max = 100;
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delete_white_text_items = false;
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}
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void PatternParser::Directory(const char * dir, const char * dir2)
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{
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directory.clear();
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directory2.clear();
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if( dir )
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PT::UTF8ToWide(dir, directory);
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if( dir2 )
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PT::UTF8ToWide(dir2, directory2);
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}
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void PatternParser::Directory(const std::string & dir)
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{
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PT::UTF8ToWide(dir, directory);
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directory2.clear();
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}
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void PatternParser::Directory(const std::string & dir, const std::string & dir2)
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{
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PT::UTF8ToWide(dir, directory);
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PT::UTF8ToWide(dir2, directory2);
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}
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void PatternParser::Directory(const wchar_t * dir, const wchar_t * dir2)
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{
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directory.clear();
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directory2.clear();
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if( dir )
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directory = dir;
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if( dir2 )
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directory2 = dir2;
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}
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void PatternParser::Directory(const std::wstring & dir)
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{
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directory = dir;
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directory2.clear();
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}
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void PatternParser::Directory(const std::wstring & dir, const std::wstring & dir2)
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{
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directory = dir;
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directory2 = dir2;
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}
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void PatternParser::SetBlocks(Blocks & blocks)
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{
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pblocks = &blocks;
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}
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void PatternParser::SetCommentary(const char * com_start, const char * com_stop)
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{
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PT::UTF8ToWide(com_start, commentary_start);
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PT::UTF8ToWide(com_stop, commentary_stop);
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}
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void PatternParser::SetCommentary(const std::string & com_start, const std::string & com_stop)
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{
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PT::UTF8ToWide(com_start, commentary_start);
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PT::UTF8ToWide(com_stop, commentary_stop);
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}
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void PatternParser::SetCommentary(const wchar_t * com_start, const wchar_t * com_stop)
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{
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commentary_start = com_start;
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commentary_stop = com_stop;
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}
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void PatternParser::SetCommentary(const std::wstring & com_start, const std::wstring & com_stop)
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{
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commentary_start = com_start;
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commentary_stop = com_stop;
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}
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void PatternParser::CreateMsg(std::wstring & out, const wchar_t * type, const wchar_t * arg)
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{
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out = commentary_start;
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out += L"Ezc: ";
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out += type;
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if( arg )
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{
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out += ' ';
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out += arg;
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}
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out += commentary_stop;
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}
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void PatternParser::ParseFile(const std::string & file_name, Pattern & pattern)
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{
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ParseFile(file_name.c_str(), pattern);
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}
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void PatternParser::ParseFile(const char * file_name, Pattern & pattern)
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{
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pat = &pattern;
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PT::UTF8ToWide(file_name, pat->item_root.file_name);
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include_level = 0;
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CreateTreeReadIncludeSkipAllowFlag(pat->item_root);
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}
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void PatternParser::ParseFile(const std::wstring & file_name, Pattern & pattern)
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{
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ParseFile(file_name.c_str(), pattern);
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}
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void PatternParser::ParseFile(const wchar_t * file_name, Pattern & pattern)
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{
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pat = &pattern;
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pat->item_root.file_name = file_name;
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include_level = 0;
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CreateTreeReadIncludeSkipAllowFlag(pat->item_root);
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}
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void PatternParser::ParseString(const char * str, Pattern & pattern)
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{
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PT::UTF8ToWide(str, string_content);
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ParseString(string_content.c_str(), pattern);
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string_content.clear();
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}
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void PatternParser::ParseString(const std::string & str, Pattern & pattern)
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{
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ParseString(str.c_str(), pattern);
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}
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void PatternParser::ParseString(const wchar_t * str, Pattern & pattern)
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{
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pat = &pattern;
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itext = str;
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include_level = 0;
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CreateTree(pat->item_root);
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}
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void PatternParser::ParseString(const std::wstring & str, Pattern & pattern)
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{
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ParseString(str.c_str(), pattern);
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}
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void PatternParser::AllowInclude(bool allow)
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{
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allow_include = allow;
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}
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void PatternParser::DeleteWhiteTextItems(bool del)
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{
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delete_white_text_items = del;
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}
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void PatternParser::SetIncludeMax(int include_max)
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{
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include_level_max = include_max;
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}
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bool PatternParser::HasFileAtBeginning(const wchar_t * path, const wchar_t * file)
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{
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for(; *path && *file; ++path, ++file)
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{
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if( *path != *file )
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return false;
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}
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if( *file != 0 )
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return false;
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// "\" is from a dos path syntax
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if( *path==0 || *path=='\\' || *path=='/' )
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return true;
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return false;
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}
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/*
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".." is not allowed in the file path
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you cannot go up from your template directory
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*/
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bool PatternParser::IsFileCorrect(const wchar_t * name)
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{
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while( *name )
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{
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if( HasFileAtBeginning(name, L"..") )
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return false;
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// looking for the next slash of backslash
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while( *name && *name!='\\' && *name!='/' )
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name += 1;
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// skipping the slash (or backslash)
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if( *name )
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name += 1;
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}
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return true;
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}
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/*
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'name' must be a relative path - without a slash or backslash
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*/
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void PatternParser::ReadFile(const std::wstring & name, std::wstring & result)
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{
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ReadFile(name.c_str(), result);
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}
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/*
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'name' must be a relative path - without a slash or backslash
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*/
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void PatternParser::ReadFile(const wchar_t * name, std::wstring & result)
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{
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if( !IsFileCorrect(name) )
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{
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CreateMsg(result, L"incorrect file name: ", name);
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}
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else
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{
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result.clear();
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if( !ReadFileFromDir(directory, name, result) )
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if( !ReadFileFromDir(directory2, name, result) )
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CreateMsg(result, L"can't open: ", name);
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}
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}
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bool PatternParser::ReadFileFromDir(const std::wstring & dir, const wchar_t * name, std::wstring & result)
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{
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if( dir.empty() )
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return false;
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file_name = dir;
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file_name += '/';
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file_name += name;
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PT::WideToUTF8(file_name, afile_name);
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std::ifstream file(afile_name.c_str());
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if( !file )
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{
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file_name.clear();
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afile_name.clear();
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return false;
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}
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#ifdef EZC_USE_WINIX_LOGGER
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if( include_level <= 1 )
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Winix::log << Winix::log3 << "Ezc: reading pattern: " << afile_name << Winix::logend;
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else
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Winix::log << Winix::log3 << " including pattern: " << afile_name << Winix::logend;
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#endif
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ReadFile(file, result);
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file_name.clear();
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afile_name.clear();
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return true;
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}
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void PatternParser::ReadFile(std::ifstream & file, std::wstring & result)
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{
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PT::UTF8ToWide(file, result);
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}
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int PatternParser::ReadCharInText()
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{
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if( *itext==0 || *itext=='[' )
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return -1;
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if( *itext == '\\' )
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{
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if( *(itext+1)=='\\' || *(itext+1)=='[' || *(itext+1)==']' )
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++itext;
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}
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return *(itext++);
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}
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bool PatternParser::IsWhite(wchar_t c)
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{
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// 13 (\r) is from a dos file at the end of a line (\r\n)
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// 160 is a non-breaking space
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if( c==' ' || c=='\t' || c==13 || c==160 || c==10 )
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return true;
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return false;
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}
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void PatternParser::SkipWhite()
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{
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while( IsWhite(*itext) )
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++itext;
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}
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void PatternParser::SkipOneStatement()
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{
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size_t count = 1;
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while( *itext != 0 && count > 0 )
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{
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if( *itext == '[' )
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count += 1;
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else
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if( *itext == ']' )
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count -= 1;
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itext += 1;
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}
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}
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void PatternParser::CheckWhiteAndDelete(std::wstring & s)
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{
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size_t i;
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if( s.empty() )
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return;
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for(i=0 ; i<s.size() && IsWhite(s[i]) ; ++i);
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if( i == s.size() )
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s.clear(); // the whole string consists of white characters
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}
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void PatternParser::CheckFunctionIsNumber(Item::Function & function)
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{
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if( IsPositiveNumber(function.name) )
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function.arg = wcstol(function.name.c_str(), 0, 10);
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}
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bool PatternParser::IsNameChar(wchar_t c)
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{
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return ((c>='a' && c<='z') ||
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(c>='A' && c<='Z') ||
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(c>='0' && c<='9') ||
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c=='_' || c=='-' || c=='.' || c=='#');
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}
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bool PatternParser::IsDigit(wchar_t c)
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{
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return (c>='0' && c<='9');
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}
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bool PatternParser::IsPositiveNumber(const std::wstring & str)
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{
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size_t i;
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for(i=0 ; i<str.size() ; ++i)
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if( !IsDigit(str[i]) )
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return false;
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return true;
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}
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// reading an expression name or a function name
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bool PatternParser::ReadName(std::wstring & name)
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{
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name.clear();
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while( IsNameChar(*itext) )
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{
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name += *itext;
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++itext;
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}
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return !name.empty();
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}
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// string can have a quote character (escaped with a backslash) e.g. "sample text \"with quotes\""
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// use \\ to insert one backslash
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bool PatternParser::ReadString(std::wstring & str)
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{
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str.clear();
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SkipWhite();
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// string is signed by its first quote character (")
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if( *itext != '\"' )
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return false;
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++itext;
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while( *itext && *itext!='\"' )
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{
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if( itext[0]=='\\' && itext[1]=='\"' )
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{
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str += '\"';
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itext += 2;
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}
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else
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if( itext[0]=='\\' && itext[1]=='\\' )
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{
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str += '\\';
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itext += 2;
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}
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else
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{
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str += *itext;
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itext += 1;
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}
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}
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if( *itext == '\"' )
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{
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++itext;
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return true;
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}
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else
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{
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return false;
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}
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}
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bool PatternParser::ReadNestedFunction(Item::Function & function)
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{
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++itext; // skipping '['
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bool res = ReadFunction(function.AddNewParam(), true);
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if( !res )
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{
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SkipOneStatement();
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return false;
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}
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SkipWhite();
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if( *itext == ']' )
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{
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++itext;
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return true;
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}
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else
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{
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SkipOneStatement();
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return false;
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}
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}
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bool PatternParser::ReadParamString(Item::Function & function)
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{
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Item::Function & fun = function.AddNewParam();
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fun.is_function = false;
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return ReadString(fun.name);
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}
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/*
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returns true if it correctly reads all parameters
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*/
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bool PatternParser::ReadParams(Item::Function & function)
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{
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bool res;
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do
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{
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SkipWhite();
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if( *itext == '[' )
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{
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res = ReadNestedFunction(function);
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}
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else
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if( *itext == '\"' )
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{
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res = ReadParamString(function);
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}
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else
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if( *itext != ']' && *itext != 0 )
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{
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res = ReadFunction(function.AddNewParam(), false);
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}
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else
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{
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// *itext is equal to ']'
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res = true;
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break;
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}
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}
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while( res );
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return res;
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}
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/*
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returns true if it correctly reads all parameters
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*/
|
|
bool PatternParser::ReadFunction(Item::Function & function, bool with_params, const std::wstring * function_name)
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{
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SkipWhite();
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function.Clear();
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function.is_function = true;
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if( function_name )
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{
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function.name = *function_name;
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}
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else
|
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if( !ReadName(function.name) )
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return false;
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|
|
if( *itext == ':' )
|
|
{
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itext += 1;
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ReadName(function.postfix); // we allow the postfix to be empty
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}
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|
|
CheckFunctionIsNumber(function);
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|
|
if( with_params )
|
|
return ReadParams(function);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
returns true if it correctly reads all parameters
|
|
*/
|
|
bool PatternParser::ReadFunction(Item & item)
|
|
{
|
|
SkipWhite();
|
|
|
|
if( *itext == ']' )
|
|
{
|
|
item.has_function = false;
|
|
}
|
|
else
|
|
{
|
|
item.has_function = true;
|
|
|
|
if( !ReadFunction(item.function, true) )
|
|
{
|
|
item.function.Clear();
|
|
item.type = Item::item_err;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadItemDirectiveCheckEnding(Item & item)
|
|
{
|
|
SkipWhite();
|
|
|
|
if( *itext == ']' )
|
|
{
|
|
itext += 1;
|
|
}
|
|
else
|
|
{
|
|
item.type = Item::item_err;
|
|
item.function.Clear();
|
|
SkipOneStatement();
|
|
}
|
|
}
|
|
|
|
|
|
// user defined directive
|
|
void PatternParser::ReadDirectiveNormal(const std::wstring & name, Item & item)
|
|
{
|
|
item.type = Item::item_function;
|
|
item.has_function = true;
|
|
|
|
if( !ReadFunction(item.function, true, &name) )
|
|
{
|
|
item.type = Item::item_err;
|
|
item.function.Clear();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveIf(Item & item)
|
|
{
|
|
item.type = Item::item_if;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveEnd(Item & item)
|
|
{
|
|
item.type = Item::item_end;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveElse(Item & item)
|
|
{
|
|
item.type = Item::item_else;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveFor(Item & item)
|
|
{
|
|
item.type = Item::item_for;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveComment(Item & item)
|
|
{
|
|
item.type = Item::item_comment;
|
|
|
|
// skipping the comment
|
|
while( *itext && *itext!=']' )
|
|
++itext;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveInclude(Item & item)
|
|
{
|
|
if( ReadString(item.file_name) )
|
|
item.type = Item::item_include;
|
|
else
|
|
item.type = Item::item_err;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::ReadDirectiveDef(Item & item)
|
|
{
|
|
item.type = Item::item_def;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
void PatternParser::ReadDirectiveFilter(Item & item)
|
|
{
|
|
item.type = Item::item_filter;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
void PatternParser::ReadDirectiveEzc(Item & item)
|
|
{
|
|
item.type = Item::item_ezc;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
/*
|
|
[out] is a shorthand for [ezc out]
|
|
*/
|
|
void PatternParser::ReadDirectiveOut(Item & item)
|
|
{
|
|
item.type = Item::item_ezc;
|
|
item.has_function = true;
|
|
|
|
item.function.Clear();
|
|
item.function.name = L"out";
|
|
item.function.is_function = true;
|
|
|
|
if( !ReadParams(item.function) )
|
|
{
|
|
item.type = Item::item_err;
|
|
item.function.Clear();
|
|
}
|
|
}
|
|
|
|
|
|
void PatternParser::ReadDirectiveBlock(Item & item)
|
|
{
|
|
item.type = Item::item_block;
|
|
ReadFunction(item);
|
|
|
|
// only one function without arguments
|
|
if( !item.function.parameters.empty() )
|
|
item.type = Item::item_err;
|
|
}
|
|
|
|
|
|
void PatternParser::ReadDirectiveReturn(Item & item)
|
|
{
|
|
item.type = Item::item_return;
|
|
ReadFunction(item);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadItemDirective(Item & item)
|
|
{
|
|
std::wstring name;
|
|
|
|
++itext;
|
|
SkipWhite();
|
|
ReadName(name);
|
|
|
|
if ( name == L"if" ) ReadDirectiveIf(item);
|
|
else if( name == L"end" ) ReadDirectiveEnd(item);
|
|
else if( name == L"else" ) ReadDirectiveElse(item);
|
|
else if( name == L"for" ) ReadDirectiveFor(item);
|
|
else if( name == L"include" ) ReadDirectiveInclude(item);
|
|
else if( name == L"def" ) ReadDirectiveDef(item);
|
|
else if( name == L"filter" ) ReadDirectiveFilter(item);
|
|
else if( name == L"ezc" ) ReadDirectiveEzc(item);
|
|
else if( name == L"out" ) ReadDirectiveOut(item);
|
|
else if( name == L"block" ) ReadDirectiveBlock(item);
|
|
else if( name == L"return" ) ReadDirectiveReturn(item);
|
|
else if( name == L"#" ) ReadDirectiveComment(item);
|
|
else if( !name.empty() ) ReadDirectiveNormal(name, item);
|
|
|
|
CreateTreeReadItemDirectiveCheckEnding(item);
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadItemText(Item & item)
|
|
{
|
|
int c;
|
|
|
|
while( (c = ReadCharInText()) != -1 )
|
|
item.text += static_cast<wchar_t>(c);
|
|
|
|
if( delete_white_text_items )
|
|
CheckWhiteAndDelete(item.text);
|
|
|
|
item.type = Item::item_text;
|
|
}
|
|
|
|
|
|
|
|
bool PatternParser::CreateTreeReadItem(Item & item)
|
|
{
|
|
item.Clear();
|
|
|
|
if( *itext == '[' )
|
|
{
|
|
CreateTreeReadItemDirective(item);
|
|
return true;
|
|
}
|
|
else
|
|
if( *itext )
|
|
{
|
|
CreateTreeReadItemText(item);
|
|
return true;
|
|
}
|
|
|
|
// the end of the string
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadInclude(Item & item)
|
|
{
|
|
if( !allow_include )
|
|
return;
|
|
|
|
CreateTreeReadIncludeSkipAllowFlag(item);
|
|
}
|
|
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadIncludeSkipAllowFlag(Item & item)
|
|
{
|
|
if( item.file_name.empty() )
|
|
return;
|
|
|
|
if( include_level > include_level_max )
|
|
{
|
|
#ifdef EZC_USE_WINIX_LOGGER
|
|
Winix::log << Winix::log1 << "Ezc: \"include\" directive has reached the maximum level" << Winix::logend;
|
|
#endif
|
|
|
|
return;
|
|
}
|
|
|
|
++include_level;
|
|
std::wstring file_text; // this temporary object must not be global (includes can be nested)
|
|
ReadFile(item.file_name, file_text);
|
|
|
|
const wchar_t * itext_old = itext;
|
|
itext = file_text.c_str();
|
|
CreateTree(item);
|
|
itext = itext_old;
|
|
--include_level;
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadIf(Item & item)
|
|
{
|
|
Item * pitem = item.AddItem();
|
|
CreateTree(*pitem);
|
|
|
|
if( pitem->LastItemType() == Item::item_else )
|
|
{
|
|
pitem->DeleteLastItem();
|
|
|
|
pitem = item.AddItem();
|
|
CreateTree(*pitem);
|
|
}
|
|
|
|
if( pitem->LastItemType() == Item::item_end )
|
|
pitem->DeleteLastItem();
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadBlock(Item & item)
|
|
{
|
|
Item item_block;
|
|
|
|
CreateTree(item_block);
|
|
|
|
if( item_block.LastItemType() == Item::item_end )
|
|
item_block.DeleteLastItem();
|
|
|
|
//if( pblocks && item.functions.size()==1 )
|
|
if( pblocks )
|
|
pblocks->Insert(item.function.name, item_block);
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTreeReadFor(Item & item)
|
|
{
|
|
Item * pitem = item.AddItem();
|
|
CreateTree(*pitem);
|
|
|
|
if( pitem->LastItemType() == Item::item_end )
|
|
pitem->DeleteLastItem();
|
|
}
|
|
|
|
|
|
|
|
void PatternParser::CreateTree(Item & item)
|
|
{
|
|
item.Clear();
|
|
item.type = Item::item_container;
|
|
|
|
while( true )
|
|
{
|
|
Item * pitem = item.AddItem();
|
|
|
|
do
|
|
{
|
|
if( !CreateTreeReadItem(*pitem) )
|
|
{
|
|
item.DeleteLastItem();
|
|
return;
|
|
}
|
|
|
|
if( pitem->type == Item::item_block )
|
|
CreateTreeReadBlock(*pitem);
|
|
}
|
|
while( pitem->type == Item::item_comment ||
|
|
pitem->type == Item::item_block );
|
|
|
|
if( pitem->type == Item::item_end || pitem->type == Item::item_else )
|
|
return;
|
|
|
|
if( pitem->type == Item::item_if )
|
|
CreateTreeReadIf(*pitem);
|
|
|
|
if( pitem->type == Item::item_for ||
|
|
pitem->type == Item::item_filter ||
|
|
pitem->type == Item::item_ezc )
|
|
CreateTreeReadFor(*pitem);
|
|
|
|
if( pitem->type == Item::item_include )
|
|
CreateTreeReadInclude(*pitem);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
} // namespace Ezc
|
|
|
|
|
|
|