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85 lines
2.2 KiB
Objective-C
85 lines
2.2 KiB
Objective-C
/*
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* CSByteStreamHandle.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 "CSByteStreamHandle.h"
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NSString *CSByteStreamEOFReachedException=@"CSByteStreamEOFReachedException";
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@implementation CSByteStreamHandle
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/*-(id)initWithName:(NSString *)descname length:(off_t)length
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{
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if(self=[super initWithName:descname length:length])
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{
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bytestreamproducebyte_ptr=(uint8_t (*)(id,SEL,off_t))[self methodForSelector:@selector(produceByteAtOffset:)];
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}
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return self;
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}*/
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-(id)initWithInputBufferForHandle:(CSHandle *)handle length:(off_t)length bufferSize:(int)buffersize;
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{
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if(self=[super initWithInputBufferForHandle:handle length:length bufferSize:buffersize])
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{
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bytestreamproducebyte_ptr=(uint8_t (*)(id,SEL,off_t))[self methodForSelector:@selector(produceByteAtOffset:)];
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}
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return self;
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}
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-(id)initAsCopyOf:(CSByteStreamHandle *)other
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{
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[self _raiseNotSupported:_cmd];
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return nil;
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}
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-(int)streamAtMost:(int)num toBuffer:(void *)buffer
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{
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bytesproduced=0;
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if(setjmp(eofenv)==0)
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{
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while(bytesproduced<num)
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{
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uint8_t byte=bytestreamproducebyte_ptr(self,@selector(produceByteAtOffset:),streampos+bytesproduced);
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((uint8_t *)buffer)[bytesproduced++]=byte;
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if(endofstream) break;
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}
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}
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else
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{
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[self endStream];
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}
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return bytesproduced;
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}
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-(void)resetStream
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{
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[self resetByteStream];
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}
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-(void)resetByteStream {}
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-(uint8_t)produceByteAtOffset:(off_t)pos { return 0; }
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-(void)endByteStream { [self endStream]; }
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@end
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