119 lines
3.3 KiB
Objective-C
119 lines
3.3 KiB
Objective-C
//
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// NSScanner_Extensions.m
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// TouchCode
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//
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// Created by Jonathan Wight on 12/08/2005.
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// Copyright 2005 toxicsoftware.com. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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#import "NSScanner_Extensions.h"
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#import "NSCharacterSet_Extensions.h"
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@implementation NSScanner (NSScanner_Extensions)
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- (NSString *)remainingString
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{
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return([[self string] substringFromIndex:[self scanLocation]]);
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}
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- (unichar)currentCharacter
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{
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return([[self string] characterAtIndex:[self scanLocation]]);
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}
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- (unichar)scanCharacter
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{
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unsigned theScanLocation = [self scanLocation];
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unichar theCharacter = [[self string] characterAtIndex:theScanLocation];
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[self setScanLocation:theScanLocation + 1];
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return(theCharacter);
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}
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- (BOOL)scanCharacter:(unichar)inCharacter
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{
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unsigned theScanLocation = [self scanLocation];
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if ([[self string] characterAtIndex:theScanLocation] == inCharacter)
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{
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[self setScanLocation:theScanLocation + 1];
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return(YES);
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}
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else
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return(NO);
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}
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- (void)backtrack:(unsigned)inCount
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{
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unsigned theScanLocation = [self scanLocation];
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if (inCount > theScanLocation)
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[NSException raise:NSGenericException format:@"Backtracked too far."];
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[self setScanLocation:theScanLocation - inCount];
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}
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- (BOOL)scanCStyleComment:(NSString **)outComment
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{
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if ([self scanString:@"/*" intoString:NULL] == YES)
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{
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NSString *theComment = NULL;
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if ([self scanUpToString:@"*/" intoString:&theComment] == NO)
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[NSException raise:NSGenericException format:@"Started to scan a C style comment but it wasn't terminated."];
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if ([theComment rangeOfString:@"/*"].location != NSNotFound)
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[NSException raise:NSGenericException format:@"C style comments should not be nested."];
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if ([self scanString:@"*/" intoString:NULL] == NO)
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[NSException raise:NSGenericException format:@"C style comment did not end correctly."];
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if (outComment != NULL)
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*outComment = theComment;
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return(YES);
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}
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else
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{
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return(NO);
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}
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}
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- (BOOL)scanCPlusPlusStyleComment:(NSString **)outComment
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{
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if ([self scanString:@"//" intoString:NULL] == YES)
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{
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NSString *theComment = NULL;
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[self scanUpToCharactersFromSet:[NSCharacterSet linebreaksCharacterSet] intoString:&theComment];
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[self scanCharactersFromSet:[NSCharacterSet linebreaksCharacterSet] intoString:NULL];
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if (outComment != NULL)
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*outComment = theComment;
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return(YES);
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}
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else
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{
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return(NO);
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}
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}
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@end
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