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/*
* CSMultiFileHandle.m
*
* Copyright (c) 2017-present, MacPaw Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#import "CSMultiFileHandle.h"
#import "CSFileHandle.h"
#include <sys/stat.h>
@implementation CSMultiFileHandle
+(CSHandle *)handleWithPathArray:(NSArray *)patharray
{
if(!patharray) return nil;
NSInteger count=[patharray count];
if(count==0) return nil;
else if(count==1) return [CSFileHandle fileHandleForReadingAtPath:[patharray objectAtIndex:0]];
else return [[[self alloc] initWithPaths:patharray] autorelease];
}
+(CSHandle *)handleWithPaths:(CSHandle *)firstpath,...
{
if(!firstpath) return nil;
NSMutableArray *array=[NSMutableArray arrayWithObject:firstpath];
NSString *path;
va_list va;
va_start(va,firstpath);
while((path=va_arg(va,NSString *))) [array addObject:path];
va_end(va);
return [self handleWithPathArray:array];
}
-(id)initWithPaths:(NSArray *)patharray
{
if(self=[super init])
{
paths=[patharray copy];
}
return self;
}
-(id)initAsCopyOf:(CSMultiFileHandle *)other
{
if(self=[super initAsCopyOf:other])
{
paths=[other->paths retain];
}
return self;
}
-(void)dealloc
{
[paths release];
[super dealloc];
}
-(NSArray *)paths { return paths; }
-(NSInteger)numberOfSegments { return [paths count]; }
-(off_t)segmentSizeAtIndex:(NSInteger)index
{
NSString *path=[paths objectAtIndex:index];
#if defined(__COCOTRON__) // Cocotron
struct _stati64 s;
if(_wstati64([path fileSystemRepresentationW],&s)) [self _raiseError];
#elif defined(__MINGW32__) // GNUstep under mingw32 - sort of untested
struct _stati64 s;
if(_wstati64((const wchar_t *)[path fileSystemRepresentation],&s)) [self _raiseError];
#else // Cocoa or GNUstep under Linux
struct stat s;
if(stat([path fileSystemRepresentation],&s)) [self _raiseError];
#endif
return s.st_size;
}
-(CSHandle *)handleAtIndex:(NSInteger)index
{
NSString *path=[paths objectAtIndex:index];
return [CSFileHandle fileHandleForReadingAtPath:path];
}
-(void)_raiseError
{
[[[[NSException alloc] initWithName:CSFileErrorException
reason:[NSString stringWithFormat:@"Error while attempting to read file \"%@\": %s.",[self name],strerror(errno)]
userInfo:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:errno] forKey:@"ErrNo"]] autorelease] raise];
}
@end
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