ds9FlexLexer.h

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// -*-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; 
                size_t yy_buffer_stack_max; 
                struct yy_buffer_state ** yy_buffer_stack; 
                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