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// Copyright 2010 Todd Ditchendorf
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "TDNCNameState.h"
#import "PKTokenizer.h"
#import "PKReader.h"
#import "TDXmlToken.h"
@interface PKTokenizerState ()
- (void)resetWithReader:(PKReader *)r;
- (void)append:(PKUniChar)c;
- (NSString *)bufferedString;
@end
@interface TDNCNameState ()
+ (BOOL)isNameChar:(PKUniChar)c;
+ (BOOL)isValidStartSymbolChar:(PKUniChar)c;
+ (BOOL)isValidNonStartSymbolChar:(PKUniChar)c;
@end
// NCName ::= (Letter | '_') (NameChar)*
@implementation TDNCNameState
//- (BOOL)isWhitespace:(PKUniChar)c {
// return (' ' == c || '\n' == c || '\r' == c || '\t' == c);
//}
// NameChar ::= Letter | Digit | '.' | '-' | '_' | CombiningChar | Extender
+ (BOOL)isNameChar:(PKUniChar)c {
if (isalnum(c)) {
return YES;
} else if ([self isValidNonStartSymbolChar:c]) {
return YES;
}
// TODO CombiningChar & Extender
return NO;
}
+ (BOOL)isValidStartSymbolChar:(PKUniChar)c {
return ('_' == c);
}
+ (BOOL)isValidNonStartSymbolChar:(PKUniChar)c {
return ('_' == c || '.' == c || '-' == c);
}
- (PKToken *)nextTokenFromReader:(PKReader *)r startingWith:(PKUniChar)cin tokenizer:(PKTokenizer *)t {
[self resetWithReader:r];
PKUniChar c = cin;
do {
[self append:c];
c = [r read];
} while ([TDNCNameState isNameChar:c]);
if (PKEOF != c) {
[r unread];
}
if ([[self bufferedString] length] == 1 && [TDNCNameState isValidStartSymbolChar:cin]) {
return [t.symbolState nextTokenFromReader:r startingWith:cin tokenizer:t];
} else {
// return [[[TDXmlToken alloc] initWithTokenType:TDTT_NAME
// stringValue:[[stringbuf copy] autorelease]
// floatValue:0.0] autorelease];
return nil;
}
}
@end
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