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a0b34ee1ee
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gsweb/trunk@5815 72102866-910b-0410-8b05-ffd578937521
109 lines
3 KiB
Objective-C
109 lines
3 KiB
Objective-C
/* NSNonBlockingFileHandle.m - NSNonBlockingFileHandle
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Copyright (C) 1999 Free Software Foundation, Inc.
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Written by: Manuel Guesdon <mguesdon@sbuilders.com>
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Date: Jan 1999
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This file is part of the GNUstep Web Library.
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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 Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <time.h>
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#include <sys/time.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <signal.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/fcntl.h>
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#include <sys/ioctl.h>
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#include <netdb.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#ifdef SOLARIS
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#include <sys/filio.h>
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#include <limits.h>
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#endif
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#include <Foundation/Foundation.h>
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#include "NSNonBlockingFileHandle.h"
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#include <gsweb/GSWeb.framework/GSWeb.h>
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#include "GSWUtils.h"
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@implementation NSFileHandle (CFRNonBlockingIO)
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//Returns an NSData object containing all of the currently available data.
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// Does not block if there is no data; returns nil instead.
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-(NSData*)availableDataNonBlocking
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{
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NSData* _data=nil;
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LOGObjectFnStart();
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_data=[self readDataOfLengthNonBlocking: UINT_MAX];
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LOGObjectFnStop();
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return _data;
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};
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// Returns an NSData object containing all of the currently available data.
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// Does not block if there is no data; returns nil instead.
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// Cover for #{-availableDataNonBlocking}.
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-(NSData*)readDataToEndOfFileNonBlocking
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{
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NSData* _data=nil;
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LOGObjectFnStart();
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_data=[self readDataOfLengthNonBlocking: UINT_MAX];
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LOGObjectFnStop();
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return _data;
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};
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-(unsigned int)_availableByteCountNonBlocking
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{
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int numBytes;
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int fd = 0;
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LOGObjectFnStart();
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fd=[self fileDescriptor];
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if(ioctl(fd, FIONREAD, (char *) &numBytes) == -1)
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{
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LOGException0(@"NSFileHandleOperationException ioctl() Err");
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[NSException raise: NSFileHandleOperationException
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format: @"ioctl() Err # %d", (int)errno];
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};
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LOGObjectFnStop();
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return numBytes;
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};
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// Reads up to length bytes of data from the file handle.
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// If no data is available, returns nil. Does not block.
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-(NSData*)readDataOfLengthNonBlocking:(unsigned int)length
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{
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NSData* _data=nil;
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unsigned int readLength;
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LOGObjectFnStart();
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readLength = [self _availableByteCountNonBlocking];
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readLength = (readLength < length) ? readLength : length;
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if (readLength>0)
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_data=[self readDataOfLength: readLength];
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LOGObjectFnStop();
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return _data;
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}
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@end
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