ObjFW  Diff

	env = [OFMutableData dataWithItemSize: sizeof(of_char16_t)];

	keyEnumerator = [environment keyEnumerator];
	objectEnumerator = [environment objectEnumerator];
	while ((key = [keyEnumerator nextObject]) != nil &&
	    (object = [objectEnumerator nextObject]) != nil) {
		[env addItems: key.UTF16String
		[env addItems: key.UTF16String count: key.UTF16StringLength];
			count: key.UTF16StringLength];
		[env addItems: &equal
		[env addItems: &equal count: 1];
			count: 1];
		[env addItems: object.UTF16String
			count: object.UTF16StringLength];
		[env addItems: &zero
		[env addItems: &zero count: 1];
			count: 1];
	}
	[env addItems: zero
	[env addItems: zero count: 2];
		count: 2];

	return env.mutableItems;
}

- (char *)of_environmentForDictionary: (OFDictionary *)environment
{
	of_string_encoding_t encoding = [OFLocale encoding];

	keyEnumerator = [environment keyEnumerator];
	objectEnumerator = [environment objectEnumerator];
	while ((key = [keyEnumerator nextObject]) != nil &&
	    (object = [objectEnumerator nextObject]) != nil) {
		[env addItems: [key cStringWithEncoding: encoding]
			count: [key cStringLengthWithEncoding: encoding]];
		[env addItems: "="
		[env addItems: "=" count: 1];
			count: 1];
		[env addItems: [object cStringWithEncoding: encoding]
			count: [object cStringLengthWithEncoding: encoding]];
		[env addItems: ""
		[env addItems: "" count: 1];
			count: 1];
	}
	[env addItems: "\0"
	[env addItems: "\0" count: 2];
		count: 2];

	return env.mutableItems;
}

- (bool)lowlevelIsAtEndOfStream
{
	if (_readPipe[0] == NULL)
		@throw [OFNotOpenException exceptionWithObject: self];

	return _atEndOfStream;
}

- (size_t)lowlevelReadIntoBuffer: (void *)buffer
- (size_t)lowlevelReadIntoBuffer: (void *)buffer length: (size_t)length
			  length: (size_t)length
{
	DWORD ret;

	if (length > UINT32_MAX)
		@throw [OFOutOfRangeException exception];

	if (_readPipe[0] == NULL)

	if (ret == 0)
		_atEndOfStream = true;

	return ret;
}

- (size_t)lowlevelWriteBuffer: (const void *)buffer
- (size_t)lowlevelWriteBuffer: (const void *)buffer length: (size_t)length
		       length: (size_t)length
{
	DWORD bytesWritten;

	if (length > UINT32_MAX)
		@throw [OFOutOfRangeException exception];

	if (_writePipe[1] == NULL)