/ray/src/lib/lex/strtreedump.h

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/*
 * lib/lex/strtreedump.h
 * 
 * Expandable, indent-capable, (alloc-ahead) string buffer for tree 
 * node dump. 
 * 
 * Copyright (c) 2003--2004 by Wolfgang Wieser ] wwieser (a) gmx <*> de [ 
 * 
 * This file may be distributed and/or modified under the terms of the 
 * GNU General Public License version 2 as published by the Free Software 
 * Foundation. 
 * 
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 * 
 */

#ifndef _LIB_LEX_STRINGTREEDUMP_H_
#define _LIB_LEX_STRINGTREEDUMP_H_ 1

#include <vm/vmconfig.h>    /* MUST be first */
#include <lib/tl/linkedlist.h>
#include <lib/tl/tlstring.h>

#include <stdio.h>   /* For FILE* in StringTreeDump::write(). */


class StringTreeDump
{
    public:
        struct Entry : LinkedListBase<Entry>
        {
            TLString str;  
            int indent;    
            
            inline Entry(int _indent) : LinkedListBase<Entry>(),str(),
                indent(_indent)  {}
            inline ~Entry()  {}
            
            inline void append(const TLString &s)
                {  str+=s;  }
            
            void RemoveEnd(char c);
            
            inline void TightenSize()
                {  str.TightenSize();  }
            
            private:
                Entry(const Entry &);
                void operator=(const Entry &);
        };
    private:
        // The actual dump is stored here: 
        // We're currently appending to ents.last(). 
        LinkedList<Entry> ents;
        int curr_indent;
        bool indent_just_added;
        
        StringTreeDump(const StringTreeDump &);
        void operator=(const StringTreeDump &);
    public:
        StringTreeDump();
        ~StringTreeDump();
        
        void AddIndent(int n=1)
            {  curr_indent+=n;  indent_just_added=1;  }
        void SubIndent(int n=1)
            {  curr_indent-=n;  }
        bool IndentJustAdded() const  {  return(indent_just_added);  }
        
        void append(const TLString &str);
        inline StringTreeDump &operator+=(const TLString &str)
            {  append(str);  return(*this);  }
        
        void RemoveEnd(char c);
        
        size_t write(FILE *fp,int indent_size=4,char indent_char=' ');
};

#endif  /* _LIB_LEX_STRINGTREEDUMP_H_ */

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