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/* $Id: xml_y.yy 2838 2007-12-01 03:02:12Z flaterco $
xml_y.yy Bison file for limited XML parser (just tags, no text).
This is *NOT* a general-purpose XML parser.
Note that all lists except for the top level one are returned in
reverse order.
Copyright (C) 1997 David Flater.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
%{
/* Cleanup2006 Legacy Cruft CloseEnough */
#include "common.hh"
#include "xmlparser.hh"
Dstr xmlfilename;
xmltag *xmlparsetree;
extern int yylex ();
extern void yyerror (constString s unusedParameter);
#define balance(lname,rname) { \
if ((*(lname)) != (*(rname))) { \
Dstr details ("Parse error in XML file "); \
details += xmlfilename; \
details += "\n<"; \
details += (*(lname)); \
details += "> ended by </"; \
details += (*(rname)); \
details += ">"; \
Global::barf (Error::XMLPARSE, details); \
} \
delete rname; }
%}
%union {
xmltag *tag;
xmlattribute *attribute;
Dstr *value;
}
%token <value> NAME ATTVALUE
%token XMLSTART
%type <tag> tag xml_file taglist
%type <attribute> attribute avlist
%%
xml_file: XMLSTART taglist
{ // Un-reverse the top-level list
xmltag *temp;
$$ = NULL;
while ($2) {
temp = $2->next;
$2->next = $$;
$$ = $2;
$2 = temp;
}
xmlparsetree = $$; }
;
taglist: tag
{ $$ = $1; }
| taglist tag
{ $$ = $2;
$$->next = $1; }
;
tag: '<' NAME avlist '>' '<' '/' NAME '>'
{
balance ($2, $7);
$$ = new xmltag;
$$->name = $2;
$$->attributes = $3;
$$->contents = NULL;
$$->next = NULL;
}
| '<' NAME avlist '>' taglist '<' '/' NAME '>'
{
balance ($2, $8);
$$ = new xmltag;
$$->name = $2;
$$->attributes = $3;
$$->contents = $5;
$$->next = NULL;
}
| '<' NAME avlist '/' '>'
{
$$ = new xmltag;
$$->name = $2;
$$->attributes = $3;
$$->contents = NULL;
$$->next = NULL;
}
| '<' NAME '>' '<' '/' NAME '>'
{
balance ($2, $6);
$$ = new xmltag;
$$->name = $2;
$$->attributes = NULL;
$$->contents = NULL;
$$->next = NULL;
}
| '<' NAME '>' taglist '<' '/' NAME '>'
{
balance ($2, $7);
$$ = new xmltag;
$$->name = $2;
$$->attributes = NULL;
$$->contents = $4;
$$->next = NULL;
}
| '<' NAME '/' '>'
{
$$ = new xmltag;
$$->name = $2;
$$->attributes = NULL;
$$->contents = NULL;
$$->next = NULL;
}
;
avlist: attribute
{ $$ = $1; }
| avlist attribute
{ $$ = $2;
$$->next = $1; }
;
attribute: NAME '=' ATTVALUE
{ $$ = new xmlattribute;
$$->name = $1;
$$->value = $3;
$$->next = NULL; }
;
%%
|
