83 lines
2.3 KiB
Text
83 lines
2.3 KiB
Text
/* $NetBSD: scanner.l,v 1.1.1.1 2009/10/26 00:29:16 christos Exp $ */
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/*
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* This file is part of flex.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE.
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*/
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%{
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/* The scanner expects to link to bison yylval . */
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#include <stdio.h>
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#include <stdlib.h>
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#include "parser.h"
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#include "config.h"
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static char* STRDUP(char* s1);
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enum yesno_t { no=0, yes=1 };
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#define YY_EXTRA_TYPE enum yesno_t
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%}
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%option 8bit outfile="scanner.c" prefix="test"
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%option reentrant bison-bridge
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%option noyywrap nomain nounput noyy_top_state noyywrap nodefault warn
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%option prefix="test" header="scanner.h"
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%option stack
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%x IN_TAG
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%x DISCARD_THRU_GT
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%%
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#define YY_USER_INIT yyextra = no;
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#define NEED_TAG_NAME yyextra
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<INITIAL>{
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"</" { NEED_TAG_NAME= yes; yy_push_state( IN_TAG, yyscanner); return LTSLASH;}
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"<"[^[:alpha:]] { yy_push_state(DISCARD_THRU_GT,yyscanner); }
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"<" { NEED_TAG_NAME= yes; yy_push_state( IN_TAG, yyscanner); return LT; }
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[^<]{1,512} { yyget_lval(yyscanner)->str = STRDUP(yytext); return TEXT;}
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}
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<IN_TAG>{
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">" { yy_pop_state( yyscanner ); return GT; }
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[[:alpha:]][[:alnum:]]* {
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if( NEED_TAG_NAME == yes){
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NEED_TAG_NAME=no;
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yylval->str = STRDUP(yytext);
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return TAGNAME;
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}
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}
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.|\r|\n { }
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}
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<DISCARD_THRU_GT>{
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[^>]{1,512} { }
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">" { yy_pop_state(yyscanner);}
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}
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%%
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static char* STRDUP(char* s1)
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{
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char* s2 = (char*)malloc(strlen(s1)+1);
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sprintf(s2,"%s",s1);
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return s2;
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}
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