ObjFW  Diff

 * 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 "macros.h"

#ifdef _WIN32
#include <windows.h>
#endif

static int lastpagebyte = 0;

@implementation OFDataArray
+ dataArrayWithItemSize: (size_t)is
{
	return [[[self alloc] initWithItemSize: is] autorelease];
}

- init

	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);

	count++;
	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;
}

- addNItems: (size_t)nitems
 fromCArray: (void*)carray
    atIndex: (size_t)index
{
	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
				 toNItems: nsize
				 withSize: itemsize];

	memmove(data + (index + nitems) * itemsize, data + index * itemsize,
	    (count - index) * itemsize);
	memcpy(data + index * itemsize, carray, nitems * itemsize);

	count += nitems;
	size = nsize;

	return self;
}

- removeNItems: (size_t)nitems
{
	size_t nsize;

	if (nitems > count)
		@throw [OFOutOfRangeException newWithClass: isa];

	count -= nitems;

	nsize = (count * itemsize + lastpagebyte) & ~lastpagebyte;

	if (size != nsize)
		data = [self resizeMemory: data
				   toSize: nsize];
	size = nsize;

	return self;
}

- removeNItems: (size_t)nitems
       atIndex: (size_t)index
{
	size_t nsize;

	if (nitems > count)
		@throw [OFOutOfRangeException newWithClass: isa];

	memmove(data + index * itemsize, data + (index + nitems) * itemsize,
	    (count - index - nitems) * itemsize);

	count -= nitems;

	nsize = (count * itemsize + lastpagebyte) & ~lastpagebyte;

	if (size != nsize)
		data = [self resizeMemory: data
				   toSize: nsize];
	size = nsize;