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