LCOM1920-T02G10

/*        $NetBSD: FlexLexer.h,v 1.2 2014/10/29 18:28:36 christos Exp $        */

// -*-C++-*-

// FlexLexer.h -- define interfaces for lexical analyzer classes generated

// by flex

// Copyright (c) 1993 The Regents of the University of California.

// All rights reserved.

//

// This code is derived from software contributed to Berkeley by

// Kent Williams and Tom Epperly.

//

//  Redistribution and use in source and binary forms, with or without

//  modification, are permitted provided that the following conditions

//  are met:

//  1. Redistributions of source code must retain the above copyright

//  notice, this list of conditions and the following disclaimer.

//  2. Redistributions in binary form must reproduce the above copyright

//  notice, this list of conditions and the following disclaimer in the

//  documentation and/or other materials provided with the distribution.

//  Neither the name of the University nor the names of its contributors

//  may be used to endorse or promote products derived from this software

//  without specific prior written permission.

//  THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

//  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

//  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

//  PURPOSE.

// This file defines FlexLexer, an abstract class which specifies the

// external interface provided to flex C++ lexer objects, and yyFlexLexer,

// which defines a particular lexer class.

//

// If you want to create multiple lexer classes, you use the -P flag

// to rename each yyFlexLexer to some other xxFlexLexer.  You then

// include <FlexLexer.h> in your other sources once per lexer class:

//

//        #undef yyFlexLexer

//        #define yyFlexLexer xxFlexLexer

//        #include <FlexLexer.h>

//

//        #undef yyFlexLexer

//        #define yyFlexLexer zzFlexLexer

//        #include <FlexLexer.h>

//        ...

#ifndef __FLEX_LEXER_H

// Never included before - need to define base class.

#define __FLEX_LEXER_H

#include <iostream>

#  ifndef FLEX_STD

#    define FLEX_STD std::

#  endif

extern "C++" {

struct yy_buffer_state;

typedef int yy_state_type;

class FlexLexer {

public:

        virtual ~FlexLexer()        { }

        const char* YYText() const        { return yytext; }

        int YYLeng()        const        { return yyleng; }

        virtual void

                yy_switch_to_buffer( struct yy_buffer_state* new_buffer ) = 0;

        virtual struct yy_buffer_state*

                yy_create_buffer( FLEX_STD istream* s, int size ) = 0;

        virtual void yy_delete_buffer( struct yy_buffer_state* b ) = 0;

        virtual void yyrestart( FLEX_STD istream* s ) = 0;

        virtual int yylex() = 0;

        // Call yylex with new input/output sources.

        int yylex( FLEX_STD istream* new_in, FLEX_STD ostream* new_out = 0 )

                {

                switch_streams( new_in, new_out );

                return yylex();

                }

        // Switch to new input/output streams.  A nil stream pointer

        // indicates "keep the current one".

        virtual void switch_streams( FLEX_STD istream* new_in = 0,

                                        FLEX_STD ostream* new_out = 0 ) = 0;

        int lineno() const                { return yylineno; }

        int debug() const                { return yy_flex_debug; }

        void set_debug( int flag )        { yy_flex_debug = flag; }

protected:

        char* yytext;

        int yyleng;

        int yylineno;                // only maintained if you use %option yylineno

        int yy_flex_debug;        // only has effect with -d or "%option debug"

};

}

#endif // FLEXLEXER_H

#if defined(yyFlexLexer) || ! defined(yyFlexLexerOnce)

// Either this is the first time through (yyFlexLexerOnce not defined),

// or this is a repeated include to define a different flavor of

// yyFlexLexer, as discussed in the flex manual.

#define yyFlexLexerOnce

extern "C++" {

class yyFlexLexer : public FlexLexer {

public:

        // arg_yyin and arg_yyout default to the cin and cout, but we

        // only make that assignment when initializing in yylex().

        yyFlexLexer( FLEX_STD istream* arg_yyin = 0, FLEX_STD ostream* arg_yyout = 0 );

        virtual ~yyFlexLexer();

        void yy_switch_to_buffer( struct yy_buffer_state* new_buffer );

        struct yy_buffer_state* yy_create_buffer( FLEX_STD istream* s, int size );

        void yy_delete_buffer( struct yy_buffer_state* b );

        void yyrestart( FLEX_STD istream* s );

        void yypush_buffer_state( struct yy_buffer_state* new_buffer );

        void yypop_buffer_state();

        virtual int yylex();

        virtual void switch_streams( FLEX_STD istream* new_in, FLEX_STD ostream* new_out = 0 );

        virtual int yywrap();

protected:

        virtual int LexerInput( char* buf, int max_size );

        virtual void LexerOutput( const char* buf, int size );

        virtual void LexerError( const char* msg );

        void yyunput( int c, char* buf_ptr );

        int yyinput();

        void yy_load_buffer_state();

        void yy_init_buffer( struct yy_buffer_state* b, FLEX_STD istream* s );

        void yy_flush_buffer( struct yy_buffer_state* b );

        int yy_start_stack_ptr;

        int yy_start_stack_depth;

        int* yy_start_stack;

        void yy_push_state( int new_state );

        void yy_pop_state();

        int yy_top_state();

        yy_state_type yy_get_previous_state();

        yy_state_type yy_try_NUL_trans( yy_state_type current_state );

        int yy_get_next_buffer();

        FLEX_STD istream* yyin;        // input source for default LexerInput

        FLEX_STD ostream* yyout;        // output sink for default LexerOutput

        // yy_hold_char holds the character lost when yytext is formed.

        char yy_hold_char;

        // Number of characters read into yy_ch_buf.

        int yy_n_chars;

        // Points to current character in buffer.

        char* yy_c_buf_p;

        int yy_init;                // whether we need to initialize

        int yy_start;                // start state number

        // Flag which is used to allow yywrap()'s to do buffer switches

        // instead of setting up a fresh yyin.  A bit of a hack ...

        int yy_did_buffer_switch_on_eof;

        size_t yy_buffer_stack_top; /**< index of top of stack. */

        size_t yy_buffer_stack_max; /**< capacity of stack. */

        struct yy_buffer_state ** yy_buffer_stack; /**< Stack as an array. */

        void yyensure_buffer_stack(void);

        // The following are not always needed, but may be depending

        // on use of certain flex features (like REJECT or yymore()).

        yy_state_type yy_last_accepting_state;

        char* yy_last_accepting_cpos;

        yy_state_type* yy_state_buf;

        yy_state_type* yy_state_ptr;

        char* yy_full_match;

        int* yy_full_state;

        int yy_full_lp;

        int yy_lp;

        int yy_looking_for_trail_begin;

        int yy_more_flag;

        int yy_more_len;

        int yy_more_offset;

        int yy_prev_more_offset;

};

}

#endif // yyFlexLexer || ! yyFlexLexerOnce