slp_filter_l.l

SLP协议在linux下的实现。此版本为1.2.1版。官方网站为www.openslp.org

/*******************************************************************
 *  Description: encode/decode LDAP filters
 *
 *  Originated: 04-21-2001
 *	Original Author: Mike Day - [e-mail]
 *
 *  Copyright (C) Michael Day, 2001 
 *
 *  This program 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 
 *  of the License, or (at your option) any later version. 
 *
 *  This program 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 this program; if not, write to the Free Software 
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. 

 *******************************************************************/
%{

#undef YYLMAX
#define YYLMAX 2048

#define yymaxdepth    slp_filter_maxdepth
#define yyparse       slp_filter_parse
#define yylex         slp_filter_lex
#define yyerror       slp_filter_error
#define yylval        slp_filter_lval
#define yychar        slp_filter_char
#define yydebug       slp_filter_debug
#define yypact        slp_filter_pact  
#define yyr1          slp_filter_r1                    
#define yyr2          slp_filter_r2                    
#define yydef         slp_filter_def           
#define yychk         slp_filter_chk           
#define yypgo         slp_filter_pgo           
#define yyact         slp_filter_act           
#define yyexca        slp_filter_exca
#define yyerrflag     slp_filter_errflag
#define yynerrs       slp_filter_nerrs
#define yyps          slp_filter_ps
#define yypv          slp_filter_pv
#define yys           slp_filter_s
#define yy_yys        slp_filter_yys
#define yystate       slp_filter_state
#define yytmp         slp_filter_tmp
#define yyv           slp_filter_v
#define yy_yyv        slp_filter_yyv
#define yyval         slp_filter_val
#define yylloc        slp_filter_lloc
#define yyreds        slp_filter_reds
#define yytoks        slp_filter_toks
#define yylhs         slp_filter_yylhs
#define yylen         slp_filter_yylen
#define yydefred      slp_filter_yydefred
#define yydgoto       slp_filter_yydgoto
#define yysindex      slp_filter_yysindex
#define yyrindex      slp_filter_yyrindex
#define yygindex      slp_filter_yygindex
#define yytable       slp_filter_yytable
#define yycheck       slp_filter_yycheck
#define yyname        slp_filter_yyname
#define yyrule        slp_filter_yyrule
#define YY_NO_UNPUT

#include "slp_filter.h"
#include "slp_filter_y.h"
#include "slp_xmalloc.h"

static char buf[2052];

void slp_filter_error(char *, ...);

void slp_filter_close_lexer(unsigned int handle);

unsigned int slp_filter_init_lexer(const char *s);

%}

/* regex macros for the lexer */
hexdigit		[0-9a-fA-F]
reserved                [()\&|!=<>~\n] /* newline in reserved set for convinience */
not_reserved            [^()\&|!=<>~\n] 


/* special lexer states */
%x QUOTED_STRING

/* table size directives */

%option noyywrap
%%

"\""                          { BEGIN QUOTED_STRING; yyless(0); }
<QUOTED_STRING>[^()\&|!=<>~\n]+  {
                                 BEGIN INITIAL; 
                                 if(NULL != (yylval.filter_string =  xstrdup(yytext)))
                                    return(OPERAND) ; 
                                 else 
                                    return(0L) ;
                              }


[ \t\v\f]*                    { ; }
"("                           { yylval.filter_int = L_PAREN; return L_PAREN ; }
")"                           { yylval.filter_int = R_PAREN; return R_PAREN ; }
"&"                           { yylval.filter_int = OP_AND; return OP_AND ; }
"|"                           { yylval.filter_int = OP_OR; return OP_OR ; }
"!"                           { yylval.filter_int = OP_NOT; return OP_NOT ; }
"="                           { yylval.filter_int = OP_EQU; return OP_EQU ; }
">="                          { yylval.filter_int = OP_GT; return OP_GT ; }
"<="                          { yylval.filter_int = OP_LT; return OP_LT ; }
"=*"                          { yylval.filter_int = OP_PRESENT; return OP_PRESENT ; }
"~="                          { yylval.filter_int = OP_APPROX; return OP_APPROX ;  }


[-+][0-9]+                  |
[-+]"0"[xX]{hexdigit}+      { 
                              yylval.filter_int = strtol(yytext, (char **) 0, 0) ;
                              return VAL_INT;
                            }

[0-9]+                      |
"0"[xX]{hexdigit}+          { 
                              yylval.filter_int = strtoul(yytext, (char **) 0, 0);
                              return VAL_INT;
                            }

[tT][rR][uU][eE]            { 
                               yylval.filter_int = 1; return VAL_BOOL; 
                            }


[fF][aA][lL][sS][eE]        { 
                               yylval.filter_int = 0; return VAL_BOOL; 
                            }


[^()\&|!=<>~ \t\v\f]+       {
                                 if(NULL != (yylval.filter_string =  xstrdup(yytext)))
                                    return(OPERAND) ; 
                                 else 
                                    return(0L) ;
                            }

%%

void filter_close_lexer(unsigned int handle)
{
    yy_delete_buffer((YY_BUFFER_STATE)handle);
}

unsigned int slp_filter_init_lexer(const char *s)
{
    memset(&buf[0], 0x00, 2052);
    strncpy(&buf[0], s, 2048);
    return((unsigned int)yy_scan_buffer(&buf[0], strlen(s) + 2));
}

void slp_filter_error(char *s, ...)
{
    return;
}