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%option noyywrap
%option nounput
%{
/* xml_lexer.l
* an XML dissector for ethereal
* lexical analyzer for XML
*
* Copyright 2004, Luis E. Garcia Ontanon <luis.ontanon@gmail.com>
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* 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.
*/
#include "packet-xml.h"
static guint8* extracted = NULL;
static gint offset;
static gint last_offset;
static gint len;
xml_token_t* head;
xml_token_t* tail;
#define YY_INPUT(buff,result,max_size) ( (result) = tvb_yyinput((buff),(max_size)) )
#define ECHO {add_xml_item(XML_GARBLED,XML_CTX_OUT, yyleng, yytext); return 0;}
static void add_xml_item(xml_token_type_t type, xml_context_t ctx, gint len, gchar* text);
static int tvb_yyinput(char* buff, guint max_len);
%}
property_dq [A-Za-z][_A-Za-z0-9:]*=["][^\"]*["]
property_sq [A-Za-z][_A-Za-z0-9:]*='[^\']*'
property_nq [A-Za-z][_A-Za-z0-9:]*=[_A-Za-z0-9]+
metatag_start "<?"
metatag_end "?>"
comment_start "<!--"
comment_end "-->"
closetag_start "</"
tag_start "<"
tag_end ">"
closedtag_end "/>"
name [A-Za-z][_A-Za-z0-9:]*
whitespace [ \t\r\n]+
text [^<]*
%START COMMENT TAG CLOSE_TAG META_TAG OUT
%%
<OUT>{comment_start} { add_xml_item(XML_COMMENT_START, XML_CTX_COMMENT, yyleng, yytext); BEGIN COMMENT;}
<COMMENT>{comment_end} { add_xml_item(XML_COMMENT_END, XML_CTX_COMMENT, yyleng, yytext); BEGIN OUT; }
<COMMENT>{text} add_xml_item(XML_TEXT, XML_CTX_COMMENT, yyleng, yytext);
<COMMENT>{tag_start} add_xml_item(XML_TEXT, XML_CTX_COMMENT, yyleng, yytext);
<OUT>{closetag_start} { add_xml_item(XML_CLOSE_TAG_START, XML_CTX_CLOSETAG, yyleng, yytext); BEGIN CLOSE_TAG; }
<CLOSE_TAG>{name} add_xml_item(XML_NAME, XML_CTX_CLOSETAG, yyleng, yytext);
<CLOSE_TAG>{whitespace} add_xml_item(XML_WHITESPACE, XML_CTX_CLOSETAG, yyleng,yytext);
<CLOSE_TAG>{tag_end} { add_xml_item(XML_TAG_END, XML_CTX_CLOSETAG, yyleng, yytext); BEGIN OUT; }
{metatag_start} { add_xml_item(XML_METATAG_START, XML_CTX_METATAG, yyleng, yytext); BEGIN META_TAG; }
<META_TAG>{property_dq} add_xml_item(XML_PROPERTY, XML_CTX_METATAG, yyleng, yytext);
<META_TAG>{property_sq} add_xml_item(XML_PROPERTY, XML_CTX_METATAG, yyleng, yytext);
<META_TAG>{property_nq} add_xml_item(XML_PROPERTY, XML_CTX_METATAG, yyleng, yytext);
<META_TAG>{whitespace} add_xml_item(XML_WHITESPACE, XML_CTX_METATAG, yyleng, yytext);
<META_TAG>{name} add_xml_item(XML_NAME, XML_CTX_METATAG, yyleng, yytext);
<META_TAG>{metatag_end} { add_xml_item(XML_METATAG_END, XML_CTX_METATAG, yyleng,yytext); BEGIN OUT; }
<OUT>{tag_start} { add_xml_item(XML_TAG_START, XML_CTX_TAG, yyleng, yytext); BEGIN TAG; }
<TAG>{property_dq} add_xml_item(XML_PROPERTY, XML_CTX_TAG, yyleng, yytext);
<TAG>{property_sq} add_xml_item(XML_PROPERTY, XML_CTX_TAG, yyleng, yytext);
<TAG>{property_nq} add_xml_item(XML_PROPERTY, XML_CTX_TAG, yyleng, yytext);
<TAG>{name} add_xml_item(XML_NAME, XML_CTX_TAG, yyleng, yytext);
<TAG>{whitespace} add_xml_item(XML_WHITESPACE, XML_CTX_TAG, yyleng, yytext);
<TAG>{closedtag_end} {add_xml_item(XML_CLOSE_TAG_END, XML_CTX_TAG, yyleng, yytext); BEGIN OUT; }
<TAG>{tag_end} {add_xml_item(XML_TAG_END, XML_CTX_TAG, yyleng, yytext); BEGIN OUT; }
<OUT>{whitespace} add_xml_item(XML_WHITESPACE, XML_CTX_OUT, yyleng, yytext);
<OUT>{text} add_xml_item(XML_TEXT, XML_CTX_OUT, yyleng, yytext);
%%
static void add_xml_item(xml_token_type_t type, xml_context_t ctx, gint the_len, gchar* text) {
xml_token_t* xi = g_malloc(sizeof(xml_token_t));
xi->type = type;
xi->ctx = ctx;
xi->offset = last_offset;
xi->len = the_len;
xi->text = text != NULL ? g_strdup(text) : NULL;
xi->next = NULL;
xi->prev = tail;
last_offset += the_len;
if (!head) head = xi;
if (!tail) {
tail = xi;
} else {
tail->next = xi;
}
tail = xi;
}
static int tvb_yyinput(char* buff, guint max_len _U_) {
if ( offset < len ) {
buff[0] = extracted[offset];
offset++;
return 1;
} else {
return YY_NULL;
}
}
extern xml_token_t* scan_tvb_for_xml_items(tvbuff_t* tvb, gint the_offset, gint the_len) {
offset = the_offset;
last_offset = the_offset;
len = the_len;
extracted = tvb_memdup(tvb,offset,len);
head = NULL;
tail = NULL;
yylex();
yyrestart(NULL);
return head;
}
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