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70 lines
2.9 KiB
C
70 lines
2.9 KiB
C
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// RSSAXParser.h
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// RSParser
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//
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// Created by Brent Simmons on 3/25/15.
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// Copyright (c) 2015 Ranchero Software, LLC. All rights reserved.
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//
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@import Foundation;
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/*Thread-safe, not re-entrant.
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Calls to the delegate will happen on the same thread where the parser runs.
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This is a low-level streaming XML parser, a thin wrapper for libxml2's SAX parser. It doesn't do much Foundation-ifying quite on purpose -- because the goal is performance and low memory use.
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This class is not meant to be sub-classed. Use the delegate methods.
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*/
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@class RSSAXParser;
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@protocol RSSAXParserDelegate <NSObject>
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@optional
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- (void)saxParser:(RSSAXParser *)SAXParser XMLStartElement:(const unsigned char *)localName prefix:(const unsigned char *)prefix uri:(const unsigned char *)uri numberOfNamespaces:(NSInteger)numberOfNamespaces namespaces:(const unsigned char **)namespaces numberOfAttributes:(NSInteger)numberOfAttributes numberDefaulted:(int)numberDefaulted attributes:(const unsigned char **)attributes;
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- (void)saxParser:(RSSAXParser *)SAXParser XMLEndElement:(const unsigned char *)localName prefix:(const unsigned char *)prefix uri:(const unsigned char *)uri;
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// Length is guaranteed to be greater than 0.
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- (void)saxParser:(RSSAXParser *)SAXParser XMLCharactersFound:(const unsigned char *)characters length:(NSUInteger)length;
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- (void)saxParserDidReachEndOfDocument:(RSSAXParser *)SAXParser; /*If canceled, may not get called (but might).*/
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- (NSString *)saxParser:(RSSAXParser *)SAXParser internedStringForName:(const unsigned char *)name prefix:(const unsigned char *)prefix; /*Okay to return nil. Prefix may be nil.*/
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- (NSString *)saxParser:(RSSAXParser *)SAXParser internedStringForValue:(const void *)bytes length:(NSUInteger)length;
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@end
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void RSSAXInitLibXMLParser(void); // Needed by RSSAXHTMLParser.
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/*For use by delegate.*/
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BOOL RSSAXEqualTags(const unsigned char *localName, const char *tag, NSInteger tagLength);
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@interface RSSAXParser : NSObject
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- (instancetype)initWithDelegate:(id<RSSAXParserDelegate>)delegate;
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- (void)parseData:(NSData *)data;
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- (void)parseBytes:(const void *)bytes numberOfBytes:(NSUInteger)numberOfBytes;
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- (void)finishParsing;
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- (void)cancel;
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@property (nonatomic, strong, readonly) NSData *currentCharacters; /*nil if not storing characters. UTF-8 encoded.*/
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@property (nonatomic, strong, readonly) NSString *currentString; /*Convenience to get string version of currentCharacters.*/
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@property (nonatomic, strong, readonly) NSString *currentStringWithTrimmedWhitespace;
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- (void)beginStoringCharacters; /*Delegate can call from XMLStartElement. Characters will be available in XMLEndElement as currentCharacters property. Storing characters is stopped after each XMLEndElement.*/
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/*Delegate can call from within XMLStartElement. Returns nil if numberOfAttributes < 1.*/
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- (NSDictionary *)attributesDictionary:(const unsigned char **)attributes numberOfAttributes:(NSInteger)numberOfAttributes;
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@end
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