mirror of
https://github.com/MacPaw/XADMaster.git
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66 lines
1.6 KiB
Objective-C
66 lines
1.6 KiB
Objective-C
/*
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* XADStuffItXBlockHandle.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 "XADStuffItXBlockHandle.h"
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#import "StuffItXUtilities.h"
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#import "XADException.h"
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@implementation XADStuffItXBlockHandle
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-(id)initWithHandle:(CSHandle *)handle
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{
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if((self=[super initWithParentHandle:handle]))
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{
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startoffs=[parent offsetInFile];
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buffer=NULL;
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currsize=0;
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}
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return self;
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}
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-(void)dealloc
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{
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free(buffer);
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[super dealloc];
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}
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-(void)resetBlockStream
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{
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[parent seekToFileOffset:startoffs];
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}
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-(int)produceBlockAtOffset:(off_t)pos
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{
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unsigned int size=(unsigned int)ReadSitxP2(parent);
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if(!size) return -1;
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if(size>currsize)
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{
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free(buffer);
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buffer=malloc(size);
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if(!buffer) [XADException raiseOutOfMemoryException];
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currsize=size;
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[self setBlockPointer:buffer];
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}
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return [parent readAtMost:size toBuffer:buffer];
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}
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@end
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