| 1 | //
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| 2 | // ICeCoffEEScanner.m
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| 3 | // ICeCoffEE
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| 4 | //
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| 5 | // Created by Nicholas Riley on Fri Feb 08 2002.
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| 6 | // Copyright (c) 2002 Nicholas Riley. All rights reserved.
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| 7 | //
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| 8 |
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| 9 | #import "ICeCoffEEScanner.h"
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| 10 |
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| 11 |
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| 12 | @implementation ICeCoffEEScanner
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| 13 |
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| 14 | - (id)initWithSource:(NSString *)aSource destination:(NSMutableString *)aDest;
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| 15 | {
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| 16 | if ( (self = [super init]) != nil) {
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| 17 | source = [aSource retain];
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| 18 | length = [source length];
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| 19 | dest = [aDest retain];
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| 20 | }
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| 21 | return self;
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| 22 | }
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| 23 |
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| 24 | - (void)dealloc;
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| 25 | {
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| 26 | [source release];
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| 27 | [dest release];
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| 28 | [super dealloc];
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| 29 | }
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| 30 |
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| 31 | - (NSRange)_nextMatchRangeForString:(NSString *)string;
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| 32 | {
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| 33 | return [source rangeOfString: string options: NSLiteralSearch range: NSMakeRange(loc, length - loc)];
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| 34 | }
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| 35 |
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| 36 | - (void)_breakWithString:(NSString *)breakString atWidth:(unsigned)width forChars:(unsigned)charsToCopy;
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| 37 | {
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| 38 | while (charsToCopy > width) {
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| 39 | [dest appendString: [source substringWithRange: NSMakeRange(loc, width)]];
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| 40 | charsToCopy -= width;
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| 41 | loc += width;
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| 42 | [dest appendString: breakString];
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| 43 | }
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| 44 | }
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| 45 |
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| 46 | - (void)breakWithString:(NSString *)breakString atWidth:(unsigned)width;
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| 47 | {
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| 48 | NSRange matchRange = {1, 1};
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| 49 |
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| 50 | while ( (matchRange = [self _nextMatchRangeForString: breakString]).location != NSNotFound) {
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| 51 | [self _breakWithString: breakString atWidth: width forChars: matchRange.location - loc];
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| 52 | [dest appendString: [source substringWithRange: NSMakeRange(loc, matchRange.location + matchRange.length - loc)]];
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| 53 | loc = matchRange.location + matchRange.length;
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| 54 | }
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| 55 |
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| 56 | if (![self isAtEnd]) {
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| 57 | [self _breakWithString: breakString atWidth: width forChars: [self remainingLength]];
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| 58 | [self appendUpToEnd];
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| 59 | [dest appendString: breakString];
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| 60 | }
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| 61 |
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| 62 | }
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| 63 |
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| 64 | - (BOOL)appendUpToString:(NSString *)string;
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| 65 | {
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| 66 | NSRange matchRange = [self _nextMatchRangeForString: string];
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| 67 |
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| 68 | if (matchRange.location == NSNotFound) return NO;
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| 69 |
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| 70 | [dest appendString: [source substringWithRange: NSMakeRange(loc, matchRange.location - loc)]];
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| 71 |
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| 72 | loc = matchRange.location + matchRange.length;
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| 73 |
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| 74 | return YES;
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| 75 | }
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| 76 |
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| 77 | - (void)appendUpToEnd;
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| 78 | {
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| 79 | [dest appendString: [source substringFromIndex: loc]];
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| 80 | loc = length;
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| 81 | }
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| 82 |
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| 83 | - (BOOL)isAtEnd;
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| 84 | {
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| 85 | return (loc >= length);
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| 86 | }
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| 87 |
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| 88 | - (unsigned)scanLocation;
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| 89 | {
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| 90 | return loc;
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| 91 | }
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| 92 |
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| 93 | - (unsigned)remainingLength;
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| 94 | {
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| 95 | return (length - loc);
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| 96 | }
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| 97 |
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| 98 | @end
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