/*
* Copyright (c) 2008 - 2009
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of libobjfw. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE included in
* the packaging of this file.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#import "OFDataArray.h"
#import "OFExceptions.h"
#import "OFMacros.h"
#ifdef _WIN32
#include <windows.h>
#endif
static int lastpagebyte = 0;
@implementation OFDataArray
+ dataArrayWithItemSize: (size_t)is
{
return [[[self alloc] initWithItemSize: is] autorelease];
}
- initWithItemSize: (size_t)is
{
Class c;
self = [super init];
if (is == 0) {
c = isa;
[super dealloc];
@throw [OFInvalidArgumentException newWithClass: c
andSelector: _cmd];
}
data = NULL;
itemsize = is;
return self;
}
- (size_t)count
{
return count;
}
- (size_t)itemsize
{
return itemsize;
}
- (void*)data
{
return data;
}
- (void*)itemAtIndex: (size_t)index
{
if (index >= count)
@throw [OFOutOfRangeException newWithClass: isa];
return data + index * itemsize;
}
- (void*)lastItem
{
return data + (count - 1) * itemsize;
}
- addItem: (void*)item
{
if (SIZE_MAX - count < 1)
@throw [OFOutOfRangeException newWithClass: isa];
data = [self resizeMemory: data
toNItems: count + 1
withSize: itemsize];
memcpy(data + count++ * itemsize, item, itemsize);
return self;
}
- addNItems: (size_t)nitems
fromCArray: (void*)carray
{
if (nitems > SIZE_MAX - count)
@throw [OFOutOfRangeException newWithClass: isa];
data = [self resizeMemory: data
toNItems: count + nitems
withSize: itemsize];
memcpy(data + count * itemsize, carray, nitems * itemsize);
count += nitems;
return self;
}
- removeNItems: (size_t)nitems
{
if (nitems > count)
@throw [OFOutOfRangeException newWithClass: isa];
data = [self resizeMemory: data
toNItems: count - nitems
withSize: itemsize];
count -= nitems;
return self;
}
- (id)copy
{
OFDataArray *new = [[OFDataArray alloc] initWithItemSize: itemsize];
[new addNItems: count
fromCArray: data];
return new;
}
- (BOOL)isEqual: (id)obj
{
if (![obj isKindOf: [OFDataArray class]])
return NO;
if ([obj count] != count || [obj itemsize] != itemsize)
return NO;
if (memcmp([obj data], data, count * itemsize))
return NO;
return YES;
}
- (int)compare: (id)obj
{
int ret;
if (![obj isKindOf: [OFDataArray class]])
@throw [OFInvalidArgumentException newWithClass: isa
andSelector: _cmd];
if ([obj itemsize] != itemsize)
@throw [OFInvalidArgumentException newWithClass: isa
andSelector: _cmd];
if ([obj count] == count)
return memcmp(data, [obj data], count * itemsize);
if (count > [obj count]) {
if ((ret = memcmp(data, [obj data], [obj count] * itemsize)))
return ret;
return *(char*)[self itemAtIndex: [obj count]];
} else {
if ((ret = memcmp(data, [obj data], count * itemsize)))
return ret;
return *(char*)[obj itemAtIndex: count] * -1;
}
}
- (uint32_t)hash
{
uint32_t hash;
size_t i;
OF_HASH_INIT(hash);
for (i = 0; i < count * itemsize; i++)
OF_HASH_ADD(hash, ((char*)data)[i]);
OF_HASH_FINALIZE(hash);
return hash;
}
@end
@implementation OFBigDataArray
- initWithItemSize: (size_t)is
{
self = [super initWithItemSize: is];
if (lastpagebyte == 0) {
#ifndef _WIN32
if ((lastpagebyte = sysconf(_SC_PAGESIZE)) == -1)
lastpagebyte = 4096;
lastpagebyte--;
#else
SYSTEM_INFO si;
GetSystemInfo(&si);
lastpagebyte = si.dwPageSize - 1;
#endif
}
return self;
}
- addItem: (void*)item
{
size_t nsize;
if (SIZE_MAX - count < 1 || count + 1 > SIZE_MAX / itemsize)
@throw [OFOutOfRangeException newWithClass: isa];
nsize = ((count + 1) * itemsize + lastpagebyte) & ~lastpagebyte;
if (size != nsize)
data = [self resizeMemory: data
toSize: nsize];
memcpy(data + count++ * itemsize, item, itemsize);
size = nsize;
return self;
}
- addNItems: (size_t)nitems
fromCArray: (void*)carray
{
size_t nsize;
if (nitems > SIZE_MAX - count || count + nitems > SIZE_MAX / itemsize)
@throw [OFOutOfRangeException newWithClass: isa];
nsize = ((count + nitems) * itemsize + lastpagebyte) & ~lastpagebyte;
if (size != nsize)
data = [self resizeMemory: data
toSize: nsize];
memcpy(data + count * itemsize, carray, nitems * itemsize);
count += nitems;
size = nsize;
return self;
}
- removeNItems: (size_t)nitems
{
size_t nsize;
if (nitems > count)
@throw [OFOutOfRangeException newWithClass: isa];
nsize = ((count - nitems) * itemsize + lastpagebyte) & ~lastpagebyte;
if (size != nsize)
data = [self resizeMemory: data
toSize: nsize];
count -= nitems;
size = nsize;
return self;
}
- (id)copy
{
OFDataArray *new = [[OFBigDataArray alloc] initWithItemSize: itemsize];
[new addNItems: count
fromCArray: data];
return new;
}
@end