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91 lines
3 KiB
Objective-C
91 lines
3 KiB
Objective-C
/*
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* XADSplitFileParser.m
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*
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* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#import "XADSplitFileParser.h"
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#import "XADRegex.h"
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#import "XADPlatform.h"
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#import "CSFileHandle.h"
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@implementation XADSplitFileParser
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+(int)requiredHeaderSize { return 0; }
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+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
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{
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if(!name) return NO;
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if(![handle isKindOfClass:[CSFileHandle class]]) return NO;
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// Check if filename is of the form .001
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NSArray *matches=[name substringsCapturedByPattern:@"^(.*)\\.([0-9]{3})$" options:REG_ICASE];
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if(!matches) return NO;
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// Find another filename in the series. Pick .001 if the given file is not already that,
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// and .002 otherwise.
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NSString *otherext;
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if([[matches objectAtIndex:2] isEqual:@"001"]) otherext=@"002";
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else otherext=@"001";
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// Check if this other file exists, too.
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NSString *othername=[NSString stringWithFormat:@"%@.%@",[matches objectAtIndex:1],otherext];
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return [XADPlatform fileExistsAtPath:othername];
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}
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+(NSArray *)volumesForHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name
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{
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NSArray *matches=[name substringsCapturedByPattern:@"^(.*)\\.[0-9]{3}$" options:REG_ICASE];
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if(matches)
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{
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return [self scanForVolumesWithFilename:name
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regex:[XADRegex regexWithPattern:[NSString stringWithFormat:@"^%@\\.[0-9]{3}$",
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[[matches objectAtIndex:1] escapedPattern]] options:REG_ICASE]
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firstFileExtension:nil];
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}
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return nil;
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}
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-(void)parse
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{
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NSString *basename=[[self name] stringByDeletingPathExtension];
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CSHandle *handle=[self handle];
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NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
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[self XADPathWithUnseparatedString:basename],XADFileNameKey,
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[NSNumber numberWithLongLong:[handle fileSize]],XADFileSizeKey,
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[NSNumber numberWithLongLong:[handle fileSize]],XADCompressedSizeKey,
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nil];
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NSString *ext=[basename pathExtension];
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if([ext caseInsensitiveCompare:@"zip"]==0)
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[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsArchiveKey];
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[self addEntryWithDictionary:dict];
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}
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-(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dict wantChecksum:(BOOL)checksum
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{
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CSHandle *handle=[self handle];
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[handle seekToFileOffset:0];
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return handle;
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}
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-(NSString *)formatName { return @"Split file"; }
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@end
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