changed: the interface in this version is not the same as previous
added: class Functions, you can define your own set of functions and then put them into the Generator added: variables parser is able to parse the "def" directive: [def variable "value"] [def variable another_variable] [def variable another_function] variables are put into a Functions object added: class Info has a reference to std::ostringstream (out) added: limit for a "for" directive limit for the whole tree (when genereting) this is to protect for a case when someone makes an infinite loop changed: many small changes git-svn-id: svn://ttmath.org/publicrep/ezc/trunk@88 e52654a7-88a9-db11-a3e9-0013d4bc506e
This commit is contained in:
parent
bf585d3716
commit
54be9c0489
413
src/ezc.cpp
413
src/ezc.cpp
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@ -5,7 +5,7 @@
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*/
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/*
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* Copyright (c) 2007, Tomasz Sowa
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* Copyright (c) 2007-2008, 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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@ -41,21 +41,29 @@ namespace Ezc
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{
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void CreateMsg(std::ostringstream & o, const char * type, const char * arg)
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{
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o << "<!-- ezc: " << type << " ";
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if( arg )
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o << arg << " ";
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o << "-->";
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}
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std::string CreateMsg(const char * type, const char * arg)
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{
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std::ostringstream buffer;
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buffer << "<!-- ezc: " << type << " ";
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if( arg )
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buffer << arg << " ";
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buffer << "-->";
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CreateMsg(buffer, type, arg);
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return buffer.str();
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}
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/*
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this method splits the input file name into a directory and a file name
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e.g
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@ -234,7 +242,9 @@ return directive;
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std::string Pattern::ReadString()
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std::string Pattern::ReadString(bool skip_first_quote)
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{
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std::string directive;
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@ -244,6 +254,7 @@ std::string directive;
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return directive;
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// string is signed by its first character equal (")
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if( !skip_first_quote )
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directive += '\"';
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for( ++itext ; *itext && *itext!='\"' && *itext!='\n' ; ++itext )
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@ -397,6 +408,27 @@ void Pattern::ReadDirectiveInclude(Item & item)
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}
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void Pattern::ReadDirectiveDef(Item & item)
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{
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item.type = Item::item_def;
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std::string directive = ReadDirective();
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if( !directive.empty() )
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{
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item.directives.push_back(directive);
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directive = ReadDirectiveOrString();
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if( !directive.empty() )
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item.directives.push_back(directive);
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}
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if( item.directives.size() != 2 )
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item.type = Item::item_err;
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}
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void Pattern::CreateTreeReadItemDirective(Item & item)
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{
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++itext;
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@ -427,6 +459,9 @@ void Pattern::CreateTreeReadItemDirective(Item & item)
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if( directive == "include" )
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ReadDirectiveInclude(item);
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else
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if( directive == "def" )
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ReadDirectiveDef(item);
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else
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if( directive == "#" )
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ReadDirectiveComment(item);
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else
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@ -658,13 +693,108 @@ Pattern::Item::~Item()
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*
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*/
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Info::Info()
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void Info::Clear()
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{
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// default settings indicate 'false'
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result = false;
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out_string.clear();
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iter = 0;
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}
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Info::Info(std::ostringstream & o) : out(o)
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{
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Clear();
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}
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bool Info::IsTrue() const
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{
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if( result || !out_string.empty() )
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return true;
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return false;
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}
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bool Info::IsFalse() const
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{
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return !IsTrue();
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}
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/*
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*
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* Functions
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*
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*
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*/
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Functions::Function::Function()
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{
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type = Functions::variable;
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user_function = 0;
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iter = 0;
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is_for = false;
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is_running = false;
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}
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void Functions::Insert(const std::string & key, UserFunction ufunction)
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{
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Function f;
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f.type = function;
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f.user_function = ufunction;
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functions_table[key] = f;
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}
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void Functions::Insert(const std::string & key, const char * var)
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{
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Function f;
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f.type = variable;
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f.variable = var;
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functions_table[key] = f;
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}
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void Functions::Insert(const std::string & key, const std::string & var)
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{
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Function f;
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f.type = variable;
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f.variable = var;
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functions_table[key] = f;
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}
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bool Functions::Find(const std::string & key, Function ** fun)
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{
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FunctionsTable::iterator i = functions_table.find( key );
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if( i == functions_table.end() )
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return false;
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*fun = &(i->second);
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return true;
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}
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void Functions::Clear()
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{
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functions_table.clear();
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}
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/*
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*
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* Generator
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@ -674,70 +804,114 @@ Info::Info()
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std::string & Generator::Generate(Pattern & data)
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bool Generator::Find(const std::string & key, Functions::Function ** function)
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{
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otext.clear();
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MakeText( data.item_root );
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if( !functions.Find(key, function) )
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{
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CreateMsg(output_stream, "can't find", key.c_str() );
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return false;
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}
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return otext;
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return true;
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}
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std::string & Generator::String()
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void Generator::CallUserFunction(Functions::Function * function, Info & info)
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{
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return otext;
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// przetestowac to jeszcze !!!! (wczesniej sprawdzenie bylo w Find) !!
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if( function->is_running )
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{
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// recurrences are not allowed
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CreateMsg(output_stream, "the function is currently running" );
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return;
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}
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function->is_running = true;
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(function->user_function)(info);
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function->is_running = false;
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}
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void Generator::Insert(const std::string & key, UserFunction ufunction)
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{
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UserInfo ui;
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ui.user_function = ufunction;
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ui.iter = 0;
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user_info_table.insert( std::make_pair(key, ui) );
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void Generator::CallVariable(Functions::Function * function, Info & info)
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{
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info.out_string = function->variable;
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}
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void Generator::Call(Functions::Function * function, Info & info)
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{
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info.Clear();
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info.iter = function->iter;
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if( function->type == Functions::function )
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CallUserFunction(function, info);
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else
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CallVariable(function, info);
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}
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// return: true if a function or variable was found and called
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bool Generator::Call(const std::string & name, Info & info, Functions::Function ** pfun)
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{
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Functions::Function * function;
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if( Find(name, &function) )
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{
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Call(function, info);
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if( pfun )
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*pfun = function;
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return true;
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}
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return false;
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}
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Generator::Generator(std::ostringstream & o, Pattern & p, Functions & f) : output_stream(o), pattern(p), functions(f), info1(o), info2(o)
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{
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}
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void Generator::Generate()
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{
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loop = 0;
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MakeText( pattern.item_root );
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}
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void Generator::MakeTextContainer(Pattern::Item & item)
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{
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std::vector<Pattern::Item*>::iterator i = item.item_table.begin();
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for( ; i != item.item_table.end() ; ++i )
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MakeText(**i);
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}
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bool Generator::Find(const std::string & key, UserInfo ** user_info)
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{
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UserInfoTable::iterator i = user_info_table.find( key );
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if( i == user_info_table.end() )
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{
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otext += CreateMsg("can't find", key.c_str() );
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return false;
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MakeText(**i);
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if( loop < 0 )
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break;
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}
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*user_info = &(i->second);
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return true;
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}
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void Generator::MakeTextNormal(Pattern::Item & item)
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{
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if( item.directives.size() != 1 )
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return;
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UserInfo * user_info;
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Call(item.directives[0], info1);
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if( Find(item.directives[0], &user_info) )
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{
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Info info;
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(user_info->user_function)(info);
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otext += info.text;
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}
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if( !info1.out_string.empty() )
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output_stream << info1.out_string;
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}
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@ -764,18 +938,11 @@ void Generator::MakeTextIfany(Pattern::Item & item)
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for( ; d != item.directives.end() ; ++d )
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{
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UserInfo * user_info;
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if( !Find(*d, &user_info) )
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if( !Call(*d, info1) )
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return;
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Info info;
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(user_info->user_function)(info);
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if( !info.text.empty() || info.result )
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if( info1.IsTrue() )
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++how_many_true;
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}
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MakeTextIf_go(item, how_many_true == item.directives.size() );
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@ -789,15 +956,7 @@ void Generator::MakeTextIfone(Pattern::Item & item)
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for( ; d != item.directives.end() ; ++d )
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{
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UserInfo * user_info;
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if( !Find(*d, &user_info) )
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return;
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Info info;
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(user_info->user_function)(info);
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if( !info.text.empty() || info.result )
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if( Call(*d, info1) && info1.IsTrue() )
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++how_many_true;
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}
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|
@ -805,32 +964,28 @@ void Generator::MakeTextIfone(Pattern::Item & item)
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}
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void Generator::MakeTextIs(Pattern::Item & item)
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{
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if( item.directives.size() != 2 )
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return;
|
||||
|
||||
UserInfo * user_info;
|
||||
|
||||
if( !Find(item.directives[0], &user_info) )
|
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if( !Call(item.directives[0], info1) )
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||||
return;
|
||||
|
||||
bool result = false;
|
||||
Info info1, info2;
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||||
(user_info->user_function)(info1);
|
||||
|
||||
if( !item.directives[1].empty() && item.directives[1][0]=='\"' )
|
||||
{
|
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if( std::strcmp(info1.text.c_str(), item.directives[1].c_str()+1) == 0 )
|
||||
// second directive is a string
|
||||
if( std::strcmp(info1.out_string.c_str(), item.directives[1].c_str()+1) == 0 )
|
||||
result = true;
|
||||
}
|
||||
else
|
||||
{
|
||||
if( Find(item.directives[1], &user_info) )
|
||||
if( Call(item.directives[1], info2) )
|
||||
{
|
||||
(user_info->user_function)(info2);
|
||||
|
||||
if( info1.result==info2.result && info1.text==info2.text )
|
||||
if( info1.result==info2.result && info1.out_string==info2.out_string )
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||||
result = true;
|
||||
}
|
||||
}
|
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|
@ -839,7 +994,7 @@ void Generator::MakeTextIs(Pattern::Item & item)
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}
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||||
|
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|
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bool Generator::MakeTextIfindexnumber(Pattern::Item & item, UserInfo * user_info, bool & result)
|
||||
bool Generator::MakeTextIfindexnumber(Pattern::Item & item, Functions::Function * function, bool & result)
|
||||
{
|
||||
if( item.directives.size() != 2 )
|
||||
return false;
|
||||
|
@ -851,12 +1006,14 @@ bool Generator::MakeTextIfindexnumber(Pattern::Item & item, UserInfo * user_info
|
|||
|
||||
if( *last_char == '\0' )
|
||||
{
|
||||
if( user_info->iter == number )
|
||||
if( function->iter == number )
|
||||
result = true;
|
||||
|
||||
// we don't have to set result as false (false is default)
|
||||
}
|
||||
else
|
||||
{
|
||||
otext += CreateMsg("if-index: syntax error");
|
||||
CreateMsg(output_stream, "if-index: syntax error");
|
||||
|
||||
return false;
|
||||
}
|
||||
|
@ -870,33 +1027,37 @@ void Generator::MakeTextIfindex(Pattern::Item & item)
|
|||
if( item.directives.size() != 2 )
|
||||
return;
|
||||
|
||||
UserInfo * user_info;
|
||||
bool result = false;
|
||||
// we actually don't call a function (or variable) here
|
||||
// but only reading an iteration index
|
||||
|
||||
if( !Find(item.directives[0], &user_info) )
|
||||
Functions::Function * function;
|
||||
|
||||
if( !Find(item.directives[0], &function) )
|
||||
return;
|
||||
|
||||
bool result = false;
|
||||
|
||||
|
||||
if( item.directives[1] == "odd" )
|
||||
{
|
||||
if( ( user_info->iter & 1) == 1 )
|
||||
if( (function->iter & 1) == 1 )
|
||||
result = true;
|
||||
}
|
||||
else
|
||||
if( item.directives[1] == "even" )
|
||||
{
|
||||
if( ( user_info->iter & 1) == 0 )
|
||||
if( (function->iter & 1) == 0 )
|
||||
result = true;
|
||||
}
|
||||
else
|
||||
if( item.directives[1] == "first" )
|
||||
{
|
||||
if( user_info->iter == 0 )
|
||||
if( function->iter == 0 )
|
||||
result = true;
|
||||
}
|
||||
else
|
||||
{
|
||||
if( !MakeTextIfindexnumber(item, user_info, result) )
|
||||
if( !MakeTextIfindexnumber(item, function, result) )
|
||||
return;
|
||||
}
|
||||
|
||||
|
@ -904,42 +1065,94 @@ void Generator::MakeTextIfindex(Pattern::Item & item)
|
|||
}
|
||||
|
||||
|
||||
|
||||
void Generator::MakeTextFor(Pattern::Item & item)
|
||||
{
|
||||
const int max_loop = 3000;
|
||||
|
||||
if( item.directives.size() != 1 )
|
||||
return;
|
||||
|
||||
UserInfo * user_info;
|
||||
Functions::Function * function;
|
||||
|
||||
if( !Find(item.directives[0], &user_info) )
|
||||
if( !Find(item.directives[0], &function) )
|
||||
return;
|
||||
|
||||
|
||||
Info info;
|
||||
user_info->iter = 0;
|
||||
|
||||
while( true )
|
||||
if( function->is_for )
|
||||
{
|
||||
(user_info->user_function)(info);
|
||||
CreateMsg(output_stream, item.directives[0].c_str(), "this function is already used in a [for] statement");
|
||||
return;
|
||||
}
|
||||
|
||||
if( info.text.empty() && !info.result )
|
||||
for( function->is_for = true, function->iter=0 ; loop != -1 ; ++function->iter )
|
||||
{
|
||||
if( function->iter >= max_loop )
|
||||
{
|
||||
CreateMsg(output_stream, item.directives[0].c_str(), "function exceeded a limit for a [for] statement");
|
||||
break;
|
||||
}
|
||||
|
||||
Call(function, info1);
|
||||
|
||||
if( info1.IsFalse() )
|
||||
break;
|
||||
|
||||
if( item.item_table.size() > 0 )
|
||||
MakeText( *item.item_table[0] );
|
||||
}
|
||||
|
||||
++info.iter;
|
||||
user_info->iter = info.iter;
|
||||
function->is_for = false;
|
||||
function->iter = 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
void Generator::MakeTextDefine(Pattern::Item & item)
|
||||
{
|
||||
if( item.directives.size() != 2 )
|
||||
return;
|
||||
|
||||
if( !item.directives[1].empty() && item.directives[1][0]=='\"' )
|
||||
{
|
||||
// second directive is a string
|
||||
functions.Insert(item.directives[0], item.directives[1].c_str() + 1);
|
||||
}
|
||||
else
|
||||
{
|
||||
Functions::Function * function;
|
||||
|
||||
if( Find(item.directives[1], &function) )
|
||||
{
|
||||
if( function->type == Functions::function )
|
||||
functions.Insert(item.directives[0], function->user_function);
|
||||
else
|
||||
functions.Insert(item.directives[0], function->variable);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
void Generator::MakeText(Pattern::Item & item)
|
||||
{
|
||||
const int max_loop = 10000;
|
||||
|
||||
if( loop == -1 )
|
||||
return;
|
||||
|
||||
if( ++loop > max_loop )
|
||||
{
|
||||
loop = -1;
|
||||
CreateMsg(output_stream, "Generator exceeded allowed number of elements");
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
switch( item.type )
|
||||
{
|
||||
case Pattern::Item::item_text:
|
||||
otext += item.text;
|
||||
output_stream << item.text;
|
||||
break;
|
||||
case Pattern::Item::item_container:
|
||||
MakeTextContainer(item);
|
||||
|
@ -962,8 +1175,11 @@ void Generator::MakeText(Pattern::Item & item)
|
|||
case Pattern::Item::item_for:
|
||||
MakeTextFor(item);
|
||||
break;
|
||||
case Pattern::Item::item_def:
|
||||
MakeTextDefine(item);
|
||||
break;
|
||||
case Pattern::Item::item_err:
|
||||
otext += CreateMsg("a wrong directive");
|
||||
CreateMsg(output_stream, "a wrong directive");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
|
@ -971,12 +1187,5 @@ void Generator::MakeText(Pattern::Item & item)
|
|||
}
|
||||
|
||||
|
||||
void Generator::Clear()
|
||||
{
|
||||
user_info_table.clear();
|
||||
otext.clear();
|
||||
}
|
||||
|
||||
|
||||
} // namespace Ezc
|
||||
|
||||
|
|
112
src/ezc.h
112
src/ezc.h
|
@ -5,7 +5,7 @@
|
|||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 2007, Tomasz Sowa
|
||||
* Copyright (c) 2007-2008, Tomasz Sowa
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
|
@ -56,11 +56,15 @@
|
|||
namespace Ezc
|
||||
{
|
||||
|
||||
void CreateMsg(std::ostringstream & o, const char * type, const char * arg = 0);
|
||||
std::string CreateMsg(const char * type, const char * arg = 0);
|
||||
void SplitUnixDirectory(const char * name, std::string & dir, std::string & file);
|
||||
void SplitUnixDirectory(const std::string & name, std::string & dir, std::string & file);
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class Pattern
|
||||
{
|
||||
public:
|
||||
|
@ -71,13 +75,17 @@ public:
|
|||
|
||||
struct Item
|
||||
{
|
||||
// change the name to 'Type'
|
||||
enum ItemType
|
||||
{
|
||||
item_none, item_container, item_text, item_ifany, item_for,
|
||||
item_else, item_end, item_err, item_normal, item_ifindex,
|
||||
item_include, item_is, item_ifone, item_comment
|
||||
item_include, item_is, item_ifone, item_comment, item_def
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
ItemType type;
|
||||
std::string text;
|
||||
std::vector<Item*> item_table;
|
||||
|
@ -111,7 +119,7 @@ private:
|
|||
void SkipWhiteCharacters();
|
||||
|
||||
std::string ReadDirective();
|
||||
std::string ReadString();
|
||||
std::string ReadString(bool skip_first_quote = false);
|
||||
std::string ReadDirectiveOrString();
|
||||
|
||||
void CreateTreeReadItemDirectiveCheckEnding(Item & item);
|
||||
|
@ -123,6 +131,7 @@ private:
|
|||
void ReadDirectiveFor(Item & item);
|
||||
void ReadDirectiveComment(Item & item);
|
||||
void ReadDirectiveInclude(Item & item);
|
||||
void ReadDirectiveDef(Item & item);
|
||||
|
||||
void CreateTreeReadItemDirective(Item & item);
|
||||
|
||||
|
@ -138,45 +147,101 @@ private:
|
|||
}; // Pattern
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
struct Info
|
||||
{
|
||||
std::string text;
|
||||
// this variables you can set in your function
|
||||
std::ostringstream & out;
|
||||
std::string out_string;
|
||||
bool result;
|
||||
|
||||
// this is set by Generator
|
||||
// normally is 0
|
||||
// in a [for] statement it indicates the number of the current iteration (the first is 0)
|
||||
int iter;
|
||||
|
||||
Info();
|
||||
|
||||
Info(std::ostringstream & o);
|
||||
void Clear();
|
||||
|
||||
bool IsTrue() const;
|
||||
bool IsFalse() const;
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class Functions
|
||||
{
|
||||
public:
|
||||
|
||||
typedef void (*UserFunction)(Info &);
|
||||
enum Type { function, variable };
|
||||
|
||||
struct Function
|
||||
{
|
||||
Type type;
|
||||
|
||||
UserFunction user_function;
|
||||
std::string variable;
|
||||
|
||||
int iter;
|
||||
bool is_for; // true if is used by a [for] statement
|
||||
bool is_running; // true if this function (if is) is currently running
|
||||
|
||||
Function();
|
||||
};
|
||||
|
||||
void Insert(const std::string & key, UserFunction ufunction); // inserting a function
|
||||
void Insert(const std::string & key, const char * var); // inserting a variable
|
||||
void Insert(const std::string & key, const std::string & var); // inserting a variable
|
||||
|
||||
bool Find(const std::string & key, Function ** fun);
|
||||
void Clear();
|
||||
|
||||
|
||||
private:
|
||||
typedef std::map<std::string, Function> FunctionsTable;
|
||||
FunctionsTable functions_table;
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class Generator
|
||||
{
|
||||
private:
|
||||
typedef void (*UserFunction)(Info &);
|
||||
|
||||
struct UserInfo
|
||||
{
|
||||
UserFunction user_function;
|
||||
int iter;
|
||||
};
|
||||
|
||||
typedef std::map<std::string, UserInfo> UserInfoTable;
|
||||
|
||||
public:
|
||||
|
||||
void Insert(const std::string & key, UserFunction ufunction);
|
||||
std::string & Generate(Pattern & data);
|
||||
std::string & String();
|
||||
void Clear();
|
||||
Generator(std::ostringstream &, Pattern & data, Functions & functions);
|
||||
void Generate();
|
||||
|
||||
private:
|
||||
|
||||
UserInfoTable user_info_table;
|
||||
std::string otext;
|
||||
std::ostringstream & output_stream;
|
||||
Pattern & pattern;
|
||||
Functions & functions;
|
||||
|
||||
Info info1, info2;
|
||||
int loop;
|
||||
|
||||
bool Find(const std::string & key, Functions::Function ** function);
|
||||
|
||||
|
||||
bool Call(const std::string & name, Info & info, Functions::Function ** pfun = 0);
|
||||
void Call(Functions::Function * function, Info & info);
|
||||
|
||||
void CallUserFunction(Functions::Function * function, Info & info);
|
||||
void CallVariable(Functions::Function * function, Info & info);
|
||||
|
||||
bool Find(const std::string & key, UserInfo ** user_info);
|
||||
void MakeTextIf_go(Pattern::Item & item, bool result);
|
||||
bool MakeTextIfindexnumber(Pattern::Item & item, UserInfo * user_info, bool & result);
|
||||
bool MakeTextIfindexnumber(Pattern::Item & item, Functions::Function * function, bool & result);
|
||||
void MakeTextIfany(Pattern::Item & item);
|
||||
void MakeTextIfone(Pattern::Item & item);
|
||||
void MakeTextIfindex(Pattern::Item & item);
|
||||
|
@ -184,6 +249,7 @@ private:
|
|||
void MakeTextContainer(Pattern::Item & item);
|
||||
void MakeTextNormal(Pattern::Item & item);
|
||||
void MakeTextIs(Pattern::Item & item);
|
||||
void MakeTextDefine(Pattern::Item & item);
|
||||
void MakeText(Pattern::Item & item);
|
||||
|
||||
}; // Generator
|
||||
|
|
Loading…
Reference in New Issue