mirror of
https://github.com/MacPaw/XADMaster.git
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108 lines
No EOL
3.4 KiB
Objective-C
108 lines
No EOL
3.4 KiB
Objective-C
/*
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* XADBzip2Parser.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 "XADBzip2Parser.h"
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#import "CSBzip2Handle.h"
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@implementation XADBzip2Parser
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+(int)requiredHeaderSize { return 10; }
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+(BOOL)recognizeFileWithHandle:(CSHandle *)handle firstBytes:(NSData *)data name:(NSString *)name;
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{
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const uint8_t *bytes=[data bytes];
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int length=[data length];
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if(length<10) return NO;
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if(bytes[0]=='B'&&bytes[1]=='Z'&&bytes[2]=='h'&&bytes[3]>='1'&&bytes[3]<='9')
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{
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if(bytes[4]==0x31&&bytes[5]==0x41&&bytes[6]==0x59
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&&bytes[7]==0x26&&bytes[8]==0x53&&bytes[9]==0x59) return YES;
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if(bytes[4]==0x17&&bytes[5]==0x72&&bytes[6]==0x45
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&&bytes[7]==0x38&&bytes[8]==0x50&&bytes[9]==0x90) return YES;
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}
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return NO;
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}
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-(void)parse
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{
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NSString *name=[self name];
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NSString *extension=[[name pathExtension] lowercaseString];
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NSString *contentname;
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if([extension isEqual:@"tbz"]||[extension isEqual:@"tbz2"]||[extension isEqual:@"tb2"]) contentname=[[name stringByDeletingPathExtension] stringByAppendingPathExtension:@"tar"];
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else contentname=[name stringByDeletingPathExtension];
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// TODO: set no filename flag
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NSMutableDictionary *dict=[NSMutableDictionary dictionaryWithObjectsAndKeys:
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[self XADPathWithUnseparatedString:contentname],XADFileNameKey,
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[self XADStringWithString:@"Bzip2"],XADCompressionNameKey,
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nil];
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if([contentname matchedByPattern:@"\\.(tar|cpio|pax|warc)$" options:REG_ICASE])
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[dict setObject:[NSNumber numberWithBool:YES] forKey:XADIsArchiveKey];
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off_t filesize=[[self handle] fileSize];
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if(filesize!=CSHandleMaxLength)
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[dict setObject:[NSNumber numberWithUnsignedLongLong:filesize] forKey:XADCompressedSizeKey];
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[self addEntryWithDictionary:dict];
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}
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-(CSHandle *)handleForEntryWithDictionary:(NSDictionary *)dictionary 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 [CSBzip2Handle bzip2HandleWithHandle:handle];
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}
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-(NSString *)formatName { return @"Bzip2"; }
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@end
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/*
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#define BZIP2SFX_SEARCHSIZE (5000)
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TODO: SFX
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XADRECOGDATA(bzip2SFX) {
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if(data[0] == '#' && data[1] == '!') {
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int i;
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if (size < 17) return 0;
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if (size > BZIP2SFX_SEARCHSIZE) size = BZIP2SFX_SEARCHSIZE;
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size -= 10;
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for (i = 2; i < (int) size; i++) {
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const xadUINT8 *p = &data[i];
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if ((p[0] == 'B') && (p[1] == 'Z') && (p[2] == 'h') &&
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((p[3] >= '1') && (p[3] <= '9')) &&
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(((p[4] == 0x31) && (p[5] == 0x41) && (p[6] == 0x59) &&
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(p[7] == 0x26) && (p[8] == 0x53) && (p[9] == 0x59)) ||
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((p[4] == 0x17) && (p[5] == 0x72) && (p[6] == 0x45) &&
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(p[7] == 0x38) && (p[8] == 0x50) && (p[9] == 0x90))
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)
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)
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{
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return 1;
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}
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}
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}
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return 0;
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}*/ |