mirror of
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111 lines
3 KiB
Objective-C
111 lines
3 KiB
Objective-C
/*
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* CSMultiFileHandle.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 "CSMultiFileHandle.h"
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#import "CSFileHandle.h"
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#include <sys/stat.h>
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@implementation CSMultiFileHandle
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+(CSHandle *)handleWithPathArray:(NSArray *)patharray
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{
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if(!patharray) return nil;
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NSInteger count=[patharray count];
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if(count==0) return nil;
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else if(count==1) return [CSFileHandle fileHandleForReadingAtPath:[patharray objectAtIndex:0]];
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else return [[[self alloc] initWithPaths:patharray] autorelease];
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}
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+(CSHandle *)handleWithPaths:(CSHandle *)firstpath,...
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{
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if(!firstpath) return nil;
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NSMutableArray *array=[NSMutableArray arrayWithObject:firstpath];
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NSString *path;
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va_list va;
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va_start(va,firstpath);
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while((path=va_arg(va,NSString *))) [array addObject:path];
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va_end(va);
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return [self handleWithPathArray:array];
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}
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-(id)initWithPaths:(NSArray *)patharray
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{
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if(self=[super init])
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{
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paths=[patharray copy];
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}
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return self;
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}
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-(id)initAsCopyOf:(CSMultiFileHandle *)other
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{
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if(self=[super initAsCopyOf:other])
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{
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paths=[other->paths retain];
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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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[paths release];
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[super dealloc];
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}
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-(NSArray *)paths { return paths; }
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-(NSInteger)numberOfSegments { return [paths count]; }
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-(off_t)segmentSizeAtIndex:(NSInteger)index
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{
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NSString *path=[paths objectAtIndex:index];
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#if defined(__COCOTRON__) // Cocotron
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struct _stati64 s;
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if(_wstati64([path fileSystemRepresentationW],&s)) [self _raiseError];
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#elif defined(__MINGW32__) // GNUstep under mingw32 - sort of untested
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struct _stati64 s;
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if(_wstati64((const wchar_t *)[path fileSystemRepresentation],&s)) [self _raiseError];
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#else // Cocoa or GNUstep under Linux
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struct stat s;
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if(stat([path fileSystemRepresentation],&s)) [self _raiseError];
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#endif
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return s.st_size;
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}
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-(CSHandle *)handleAtIndex:(NSInteger)index
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{
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NSString *path=[paths objectAtIndex:index];
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return [CSFileHandle fileHandleForReadingAtPath:path];
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}
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-(void)_raiseError
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{
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[[[[NSException alloc] initWithName:CSFileErrorException
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reason:[NSString stringWithFormat:@"Error while attempting to read file \"%@\": %s.",[self name],strerror(errno)]
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userInfo:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:errno] forKey:@"ErrNo"]] autorelease] raise];
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}
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@end
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