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Documentation                       Search   lex.h Go to the documentation of this file. /* Copyright, 2000 Nevrax Ltd. * * This file is part of NEVRAX NEL. * NEVRAX NEL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * NEVRAX NEL is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * You should have received a copy of the GNU General Public License * along with NEVRAX NEL; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, * MA 02111-1307, USA. */ #ifndef NL_LEX_H #define NL_LEX_H #include <strstream> struct yy_buffer_state; typedef int yy_state_type; #define YY_SKIP_YYWRAP namespace NLAISCRIPT { class FlexLexer { public: virtual ~FlexLexer() { } const char* YYText() { return yytext; } int YYLeng() { return yyleng; } virtual void yy_switch_to_buffer( struct yy_buffer_state* new_buffer ) = 0; virtual struct yy_buffer_state* yy_create_buffer( istream* s, int size ) = 0; virtual void yy_delete_buffer( struct yy_buffer_state* b ) = 0; virtual void yyrestart( istream* s ) = 0; virtual int yylex() = 0; // Call yylex with new input/output sources. int yylex( istream* new_in, 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( istream* new_in = 0, 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" }; #define yyFlexLexerOnce 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( istream* arg_yyin = 0, ostream* arg_yyout = 0 ); virtual ~yyFlexLexer(); void yy_switch_to_buffer( struct yy_buffer_state* new_buffer ); struct yy_buffer_state* yy_create_buffer( istream* s, int size ); void yy_delete_buffer( struct yy_buffer_state* b ); void yyrestart( istream* s ); virtual int yylex(); virtual void switch_streams( istream* new_in, ostream* new_out ); 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, 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(); istream* yyin; // input source for default LexerInput ostream* yyout; // output sink for default LexerOutput struct yy_buffer_state* yy_current_buffer; // 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; // 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; //this is a new define type for our operation char LastyyText[2][1024*4]; double LastyyNum; int yyLine,yyColone; virtual int yywrap() = 0; virtual void setNewLine() = 0; }; } #endif