/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
* 2018, 2019
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#import "OFMutableData.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
@implementation OFMutableData
+ (instancetype)data
{
return [[[self alloc] init] autorelease];
}
+ (instancetype)dataWithItemSize: (size_t)itemSize
{
return [[[self alloc] initWithItemSize: itemSize] autorelease];
}
+ (instancetype)dataWithCapacity: (size_t)capacity
{
return [[[self alloc] initWithCapacity: capacity] autorelease];
}
+ (instancetype)dataWithItemSize: (size_t)itemSize
capacity: (size_t)capacity
{
return [[[self alloc] initWithItemSize: itemSize
capacity: capacity] autorelease];
}
- (instancetype)init
{
self = [super init];
_itemSize = 1;
return self;
}
- (instancetype)initWithItemSize: (size_t)itemSize
{
self = [super init];
@try {
if (itemSize == 0)
@throw [OFInvalidArgumentException exception];
_itemSize = itemSize;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithCapacity: (size_t)capacity
{
return [self initWithItemSize: 1
capacity: capacity];
}
- (instancetype)initWithItemSize: (size_t)itemSize
capacity: (size_t)capacity
{
self = [super init];
@try {
if (itemSize == 0)
@throw [OFInvalidArgumentException exception];
_items = [self allocMemoryWithSize: itemSize
count: capacity];
_itemSize = itemSize;
_capacity = capacity;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (instancetype)initWithItems: (const void *)items
itemSize: (size_t)itemSize
count: (size_t)count
{
self = [super initWithItems: items
itemSize: itemSize
count: count];
_capacity = _count;
return self;
}
- (instancetype)initWithItemsNoCopy: (void *)items
itemSize: (size_t)itemSize
count: (size_t)count
freeWhenDone: (bool)freeWhenDone
{
self = [self initWithItems: items
itemSize: itemSize
count: count];
if (freeWhenDone)
free(items);
return self;
}
- (instancetype)initWithStringRepresentation: (OFString *)string
{
self = [super initWithStringRepresentation: string];
_capacity = _count;
return self;
}
- (void *)mutableItems
{
return _items;
}
- (void *)mutableItemAtIndex: (size_t)idx
{
if (idx >= _count)
@throw [OFOutOfRangeException exception];
return _items + idx * _itemSize;
}
- (OFData *)subdataWithRange: (of_range_t)range
{
if (range.length > SIZE_MAX - range.location ||
range.location + range.length > _count)
@throw [OFOutOfRangeException exception];
return [OFData dataWithItems: _items + (range.location * _itemSize)
itemSize: _itemSize
count: range.length];
}
- (void)addItem: (const void *)item
{
if (SIZE_MAX - _count < 1)
@throw [OFOutOfRangeException exception];
if (_count + 1 > _capacity) {
_items = [self resizeMemory: _items
size: _itemSize
count: _count + 1];
_capacity = _count + 1;
}
memcpy(_items + _count * _itemSize, item, _itemSize);
_count++;
}
- (void)insertItem: (const void *)item
atIndex: (size_t)idx
{
[self insertItems: item
atIndex: idx
count: 1];
}
- (void)addItems: (const void *)items
count: (size_t)count
{
if (count > SIZE_MAX - _count)
@throw [OFOutOfRangeException exception];
if (_count + count > _capacity) {
_items = [self resizeMemory: _items
size: _itemSize
count: _count + count];
_capacity = _count + count;
}
memcpy(_items + _count * _itemSize, items, count * _itemSize);
_count += count;
}
- (void)insertItems: (const void *)items
atIndex: (size_t)idx
count: (size_t)count
{
if (count > SIZE_MAX - _count || idx > _count)
@throw [OFOutOfRangeException exception];
if (_count + count > _capacity) {
_items = [self resizeMemory: _items
size: _itemSize
count: _count + count];
_capacity = _count + count;
}
memmove(_items + (idx + count) * _itemSize, _items + idx * _itemSize,
(_count - idx) * _itemSize);
memcpy(_items + idx * _itemSize, items, count * _itemSize);
_count += count;
}
- (void)increaseCountBy: (size_t)count
{
if (count > SIZE_MAX - _count)
@throw [OFOutOfRangeException exception];
if (_count + count > _capacity) {
_items = [self resizeMemory: _items
size: _itemSize
count: _count + count];
_capacity = _count + count;
}
memset(_items + _count * _itemSize, '\0', count * _itemSize);
_count += count;
}
- (void)removeItemAtIndex: (size_t)idx
{
[self removeItemsInRange: of_range(idx, 1)];
}
- (void)removeItemsInRange: (of_range_t)range
{
if (range.length > SIZE_MAX - range.location ||
range.location + range.length > _count)
@throw [OFOutOfRangeException exception];
memmove(_items + range.location * _itemSize,
_items + (range.location + range.length) * _itemSize,
(_count - range.location - range.length) * _itemSize);
_count -= range.length;
@try {
_items = [self resizeMemory: _items
size: _itemSize
count: _count];
_capacity = _count;
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
}
}
- (void)removeLastItem
{
if (_count == 0)
return;
_count--;
@try {
_items = [self resizeMemory: _items
size: _itemSize
count: _count];
_capacity = _count;
} @catch (OFOutOfMemoryException *e) {
/* We don't care, as we only made it smaller */
}
}
- (void)removeAllItems
{
[self freeMemory: _items];
_items = NULL;
_count = 0;
_capacity = 0;
}
- (id)copy
{
return [[OFData alloc] initWithItems: _items
itemSize: _itemSize
count: _count];
}
- (void)makeImmutable
{
object_setClass(self, [OFData class]);
}
@end