| // -*-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> |
| |
| 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( yy_buffer_state* new_buffer ) = 0; |
| virtual yy_buffer_state* yy_create_buffer( std::istream* s, int size ) = 0; |
| virtual yy_buffer_state* yy_create_buffer( std::istream& s, int size ) = 0; |
| virtual void yy_delete_buffer( yy_buffer_state* b ) = 0; |
| virtual void yyrestart( std::istream* s ) = 0; |
| virtual void yyrestart( std::istream& s ) = 0; |
| |
| virtual int yylex() = 0; |
| |
| // Call yylex with new input/output sources. |
| int yylex( std::istream& new_in, std::ostream& new_out ) |
| { |
| switch_streams( new_in, new_out ); |
| return yylex(); |
| } |
| |
| int yylex( std::istream* new_in, 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( std::istream* new_in, |
| std::ostream* new_out ) = 0; |
| virtual void switch_streams( std::istream& new_in, |
| std::ostream& new_out ) = 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( std::istream& arg_yyin, std::ostream& arg_yyout ); |
| yyFlexLexer( std::istream* arg_yyin = 0, std::ostream* arg_yyout = 0 ); |
| private: |
| void ctor_common(); |
| |
| public: |
| |
| virtual ~yyFlexLexer(); |
| |
| void yy_switch_to_buffer( yy_buffer_state* new_buffer ); |
| yy_buffer_state* yy_create_buffer( std::istream* s, int size ); |
| yy_buffer_state* yy_create_buffer( std::istream& s, int size ); |
| void yy_delete_buffer( yy_buffer_state* b ); |
| void yyrestart( std::istream* s ); |
| void yyrestart( std::istream& s ); |
| |
| void yypush_buffer_state( yy_buffer_state* new_buffer ); |
| void yypop_buffer_state(); |
| |
| virtual int yylex(); |
| virtual void switch_streams( std::istream& new_in, std::ostream& new_out ); |
| virtual void switch_streams( std::istream* new_in = 0, 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( yy_buffer_state* b, std::istream& s ); |
| void yy_flush_buffer( 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(); |
| |
| std::istream yyin; // input source for default LexerInput |
| 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. */ |
| 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 |