forked from itod/parsekit
/
TDSlashStarState.m
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/
TDSlashStarState.m
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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/TDSlashStarState.h>
#import <ParseKit/TDSlashState.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 TDSlashStarState
- (PKToken *)nextTokenFromReader:(PKReader *)r startingWith:(PKUniChar)cin tokenizer:(PKTokenizer *)t {
NSParameterAssert(r);
NSParameterAssert(t);
BOOL reportTokens = t.slashState.reportsCommentTokens;
if (reportTokens) {
[self resetWithReader:r];
[self append:'/'];
}
NSInteger c = cin;
while (-1 != c) {
if (reportTokens) {
[self append:c];
}
c = [r read];
if ('*' == c) {
NSInteger peek = [r read];
if ('/' == peek) {
if (reportTokens) {
[self append:c];
[self append:peek];
}
c = [r read];
break;
} else if ('*' == peek) {
[r unread];
} else {
if (reportTokens) {
[self append:c];
}
c = peek;
}
}
}
if (-1 != c) {
[r unread];
}
if (reportTokens) {
return [PKToken tokenWithTokenType:PKTokenTypeComment stringValue:[self bufferedString] floatValue:0.0];
} else {
return [t nextToken];
}
}
@end