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/*
This file is part of HelpViewer (http://www.roard.com/helpviewer)
Copyright (C) 2003 Nicolas Roard (nicolas@roard.com)
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.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "Parser.h"
/*
I rewrote this very simple SAX-inspired Parser ...
Very basic, but for HelpViewer needs it's enough
*/
#define RESET(str) [str release]; str = [[NSMutableString alloc] init];
@implementation Parser
+ (void) parserWithHandler: (id) handler
withData: (NSData*) data
{
//NSString* file = [NSString stringWithContentsOfFile: filename];
NSString* file = [[NSString alloc] initWithData: data encoding: NSISOLatin1StringEncoding];
NSMutableString* current = [[NSMutableString alloc] init];
//NSLog (@"on a charg le fichier %@", filename);
if (file != nil)
{
int i;
BOOL Tag = NO;
BOOL EndingTag = NO;
BOOL AttributeStarted = NO;
NSString* TagName = nil;
NSString* KeyAttribute = nil;
NSMutableDictionary* TagAttributes = nil;
NSLog (@"file length : %d", [file length]);
for (i=0; i < [file length]; i++)
{
unichar c = [file characterAtIndex: i];
if (i %1000 == 0) NSLog (@"caractres lus : %d", i);
if ((!Tag) && (c == '<'))
{
// We have a tag ...
Tag = YES;
// We send the previous characters to the handler
[handler characters: current];
// We recreate a current string
RESET (current);
}
else if ((Tag) && (c == '>'))
{
// We close a tag ...
Tag = NO;
// We send the tag to the handler
if (EndingTag)
{
NSLog (@"end tag name : %@", current);
[handler endElement: current];
EndingTag = NO;
}
else
{
if (TagName == nil)
{
// If no tag name, current == tag name ...
NSLog (@"no tag name : %@", current);
[handler startElement: current attributes: nil];
}
else
{
NSLog (@"tag name : %@", TagName);
NSLog (@"attributes : %@", TagAttributes);
[handler startElement: TagName attributes: TagAttributes];
}
[TagName release]; TagName = nil;
[KeyAttribute release]; KeyAttribute = nil;
[TagAttributes release]; TagAttributes = nil;
}
RESET (current);
}
else
{
// other character ...
if (Tag)
{
if (c == '/')
{
// We have a closing tag
// FIXME : this approach is not optimal and could be wrong
EndingTag = YES;
}
else if (c == ' ')
{
if (TagName == nil)
{
// We set the tag name
TagName = [[NSString alloc] initWithString: current];
RESET (current);
}
}
else if (c == '=')
{
KeyAttribute = [NSString stringWithString: current];
KeyAttribute = RETAIN ([NSString trimString: KeyAttribute]);
//KeyAttribute = [[NSString alloc] init];
RESET (current);
if (TagAttributes == nil)
{
TagAttributes = [[NSMutableDictionary alloc] init];
}
AttributeStarted = NO;
}
else if (c == '"')
{
if (AttributeStarted)
{
[TagAttributes setObject: current forKey: KeyAttribute];
[KeyAttribute release]; KeyAttribute = nil;
RESET (current);
}
else
{
AttributeStarted = YES;
RESET (current);
}
}
else
[current appendString : [NSString stringWithCharacters: &c length: 1]];
}
else
[current appendString : [NSString stringWithCharacters: &c length: 1]];
}
}
NSLog (@"Parse termin !");
[file release];
[current release];
[TagName release];
[KeyAttribute release];
[TagAttributes release];
}
}
@end
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