From 2496b2552f0ab644222ca54231c876ff56c81bcb Mon Sep 17 00:00:00 2001
From: Vern Paxson <vern@ee.lbl.gov>
Date: Thu, 16 Sep 1993 20:53:46 +0000
Subject: [PATCH] Initial revision

---
 FlexLexer.h | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 FlexLexer.h

diff --git a/FlexLexer.h b/FlexLexer.h
new file mode 100644
index 0000000..7ff494f
--- /dev/null
+++ b/FlexLexer.h
@@ -0,0 +1,132 @@
+// $Header$
+
+// FlexLexer.h -- define a base class for lexical analyzers 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.
+//
+// Redistribution and use in source and binary forms are permitted provided
+// that: (1) source distributions retain this entire copyright notice and
+// comment, and (2) distributions including binaries display the following
+// acknowledgement:  ``This product includes software developed by the
+// University of California, Berkeley and its contributors'' in the
+// documentation or other materials provided with the distribution and in
+// all advertising materials mentioning features or use of this software.
+// 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.
+
+#ifndef __FLEXCXX_H
+#define __FLEXCXX_H
+
+#include <stdio.h>
+
+
+class yyFlexLexer {
+ public:
+	yyFlexLexer( FILE* arg_yyin = 0, FILE* arg_yyout = 0 )
+		{
+		yyin = arg_yyin;
+		yyout = arg_yyout;
+		yy_c_buf_p = (YY_CHAR*) 0;
+		yy_init = 1;
+		yy_start = 0;
+
+		yy_did_buffer_switch_on_eof = 0;
+
+		yy_looking_for_trail_begin = 0;
+		yy_more_flag = 0;
+		yy_more_len = 0;
+
+		yy_current_buffer = 0;
+
+#ifdef YY_USES_REJECT
+		yy_state_buf = new yy_state_type[YY_BUF_SIZE + 2];
+#else
+		yy_state_buf = 0;
+#endif
+		}
+
+	virtual ~yyFlexLexer()
+		{
+		delete yy_state_buf;
+		}
+
+	void yy_switch_to_buffer( YY_BUFFER_STATE new_buffer );
+	YY_BUFFER_STATE yy_create_buffer( FILE* file, int size );
+	void yy_delete_buffer( YY_BUFFER_STATE b );
+	void yyrestart( FILE *input_file );
+
+	virtual int yylex() = 0;
+
+ protected:
+	virtual int LexerInput( char* buf, int max_size )
+		{
+		return read( fileno(yyin), buf, max_size );
+		}
+
+	virtual void LexerOutput( const char* buf, int size )
+		{
+		(void) fwrite( (char*) buf, size, 1, yyout );
+		}
+
+	void yyunput( YY_CHAR c, YY_CHAR* buf_ptr );
+	int yyinput();
+
+	void yy_load_buffer_state();
+	void yy_init_buffer( YY_BUFFER_STATE b, FILE* file );
+
+	yy_state_type yy_get_previous_state();
+	yy_state_type yy_try_NUL_trans( yy_state_type current_state );
+	int yy_get_next_buffer();
+
+	FILE* yyin;	// input source for default LexerInput
+	FILE* yyout;	// output sink for default LexerOutput
+
+	YY_BUFFER_STATE yy_current_buffer;
+
+	// yy_hold_char holds the character lost when yytext is formed.
+	YY_CHAR yy_hold_char;
+
+	// Number of characters read into yy_ch_buf.
+	int yy_n_chars;
+
+	YY_CHAR* yytext;
+	int yyleng;
+
+	// Points to current character in buffer.
+	YY_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;
+	YY_CHAR* yy_last_accepting_cpos;
+
+	yy_state_type* yy_state_buf;
+	yy_state_type* yy_state_ptr;
+
+	YY_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;
+};
+#endif
-- 
2.40.0