ObjFW  Check-in [6b6856298d]

#if defined(OF_OBJFW_RUNTIME)
- (instancetype)of_initWithIvar: (struct objc_ivar *)ivar
{
	self = [super init];

	@try {
		if (ivar->name != NULL)
			_name = [[OFString alloc]
			    initWithUTF8String: ivar->name];

		_typeEncoding = ivar->type;
		_offset = ivar->offset;
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}
#elif defined(OF_APPLE_RUNTIME)
- (instancetype)of_initWithIvar: (Ivar)ivar
{
	self = [super init];

	@try {
		const char *name = ivar_getName(ivar);

		if (name != NULL)
			_name = [[OFString alloc] initWithUTF8String: name];

		_typeEncoding = ivar_getTypeEncoding(ivar);
		_offset = ivar_getOffset(ivar);
	} @catch (id e) {
		[self release];
		@throw e;
	}

 * The file name of the entry.
 */
@property (readwrite, copy, nonatomic) OFString *fileName;

/*!
 * The mode of the entry.
 */
@property (readwrite, nonatomic) uint32_t mode;

/*!
 * The UID of the owner.
 */
@property (readwrite, nonatomic) uint32_t UID;

/*!
 * The GID of the group.
 */
@property (readwrite, nonatomic) uint32_t GID;

/*!
 * The size of the file.
 */
@property (readwrite, nonatomic) uint64_t size;

/*!

- (void)setFileName: (OFString *)fileName
{
	OFString *old = _fileName;
	_fileName = [fileName copy];
	[old release];
}

- (void)setMode: (uint32_t)mode
{
	_mode = mode;
}

- (void)setUID: (uint32_t)UID
{
	_UID = UID;
}

- (void)setGID: (uint32_t)GID
{
	_GID = GID;
}

- (void)setSize: (uint64_t)size
{
	_size = size;

	[super dealloc];
}

- (OFTarArchiveEntry *)nextEntry
{
	OFTarArchiveEntry *entry;
	union {
		unsigned char c[512];
		uint32_t u32[512 / sizeof(uint32_t)];
	} buffer;
	bool empty = true;

	if (_mode != OF_TAR_ARCHIVE_MODE_READ)
		@throw [OFInvalidArgumentException exception];

#import "OFTarArchiveEntry.h"

OF_ASSUME_NONNULL_BEGIN

@class OFStream;

@interface OFTarArchiveEntry ()
- (instancetype)of_initWithHeader: (unsigned char [_Nonnull 512])header
    OF_METHOD_FAMILY(init);
- (void)of_writeToStream: (OFStream *)stream;
@end

OF_ASSUME_NONNULL_END

 * @class OFTarArchiveEntry OFTarArchiveEntry.h ObjFW/OFTarArchiveEntry.h
 *
 * @brief A class which represents an entry of a tar archive.
 */
@interface OFTarArchiveEntry: OFObject <OFCopying, OFMutableCopying>
{
	OFString *_fileName;
	uint32_t _mode;
	uint64_t _size;
	uint32_t _UID, _GID;
	OFDate *_modificationDate;
	of_tar_archive_entry_type_t _type;
	OFString *_Nullable _targetFileName;
	OFString *_Nullable _owner, *_Nullable _group;
	uint32_t _deviceMajor, _deviceMinor;
}

/*!
 * The file name of the entry.
 */
@property (readonly, copy, nonatomic) OFString *fileName;

/*!
 * The mode of the entry.
 */
@property (readonly, nonatomic) uint32_t mode;

/*!
 * The UID of the owner.
 */
@property (readonly, nonatomic) uint32_t UID;

/*!
 * The GID of the group.
 */
@property (readonly, nonatomic) uint32_t GID;

/*!
 * The size of the file.
 */
@property (readonly, nonatomic) uint64_t size;

/*!

#import "OFTarArchiveEntry+Private.h"
#import "OFStream.h"
#import "OFDate.h"

#import "OFOutOfRangeException.h"

static OFString *
stringFromBuffer(const unsigned char *buffer, size_t length)
{
	for (size_t i = 0; i < length; i++)
		if (buffer[i] == '\0')
			length = i;

	return [OFString stringWithUTF8String: (const char *)buffer
				       length: length];
}

static void
stringToBuffer(unsigned char *buffer, OFString *string, size_t length)
{
	size_t UTF8StringLength = [string UTF8StringLength];

	if (UTF8StringLength > length)
		@throw [OFOutOfRangeException exception];

	memcpy(buffer, [string UTF8String], UTF8StringLength);

	for (size_t i = UTF8StringLength; i < length; i++)
		buffer[i] = '\0';
}

static uintmax_t
octalValueFromBuffer(const unsigned char *buffer, size_t length, uintmax_t max)
{
	uintmax_t value;

	if (length == 0)
		return 0;

	if (buffer[0] == 0x80) {
		for (size_t i = 1; i < length; i++)
			value = (value << 8) | buffer[i];
	} else
		value = [stringFromBuffer(buffer, length) octalValue];

	if (value > max)
		@throw [OFOutOfRangeException exception];

	return value;
}

@implementation OFTarArchiveEntry
+ (instancetype)entryWithFileName: (OFString *)fileName
{
	return [[[self alloc] initWithFileName: fileName] autorelease];
}

- init
{
	OF_INVALID_INIT_METHOD
}

- (instancetype)of_initWithHeader: (unsigned char [512])header
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		OFString *targetFileName;

		_fileName = [stringFromBuffer(header, 100) copy];
		_mode = (uint32_t)octalValueFromBuffer(
		    header + 100, 8, UINT32_MAX);
		_UID = (uint32_t)octalValueFromBuffer(
		    header + 108, 8, UINT32_MAX);
		_GID = (uint32_t)octalValueFromBuffer(
		    header + 116, 8, UINT32_MAX);
		_size = (uint64_t)octalValueFromBuffer(
		    header + 124, 12, UINT64_MAX);
		_modificationDate = [[OFDate alloc]
		    initWithTimeIntervalSince1970:
		    (of_time_interval_t)octalValueFromBuffer(
		    header + 136, 12, UINTMAX_MAX)];
		_type = header[156];

}

- (OFString *)fileName
{
	return _fileName;
}

- (uint32_t)mode
{
	return _mode;
}

- (uint32_t)UID
{
	return _UID;
}

- (uint32_t)GID
{
	return _GID;
}

- (uint64_t)size
{
	return _size;