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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 <ParseKit/TDSignificantWhitespaceState.h>
#import <ParseKit/PKReader.h>
#import <ParseKit/PKTokenizer.h>
#import <ParseKit/PKToken.h>
#import <ParseKit/PKTypes.h>
@interface PKTokenizerState ()
- (void)resetWithReader:(PKReader *)r;
- (void)append:(PKUniChar)c;
- (NSString *)bufferedString;
@end
@implementation PKToken (TDSignificantWhitespaceStateAdditions)
- (BOOL)isWhitespace {
return self.tokenType == PKTokenTypeWhitespace;
}
- (NSString *)debugDescription {
NSString *typeString = nil;
if (self.isNumber) {
typeString = @"Number";
} else if (self.isQuotedString) {
typeString = @"Quoted String";
} else if (self.isSymbol) {
typeString = @"Symbol";
} else if (self.isWord) {
typeString = @"Word";
} else if (self.isWhitespace) {
typeString = @"Whitespace";
}
return [NSString stringWithFormat:@"<%@ %C%@%C>", typeString, 0x00ab, self.value, 0x00bb];
}
@end
@implementation TDSignificantWhitespaceState
- (void)dealloc {
[super dealloc];
}
- (PKToken *)nextTokenFromReader:(PKReader *)r startingWith:(PKUniChar)cin tokenizer:(PKTokenizer *)t {
NSParameterAssert(r);
[self resetWithReader:r];
c = cin;
while ([self isWhitespaceChar:c]) {
[self append:c];
c = [r read];
}
if (c != -1) {
[r unread];
}
return [PKToken tokenWithTokenType:PKTokenTypeWhitespace stringValue:[self bufferedString] floatValue:0.0];
}
@end
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