ObjFW  Diff

@implementation OFZIPArchive_LocalFileHeader
- initWithStream: (OFStream *)stream
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();
		OFMutableData *extraField = nil;
		uint16_t fileNameLength, extraFieldLength;
		of_string_encoding_t encoding;
		const uint8_t *ZIP64;
		size_t ZIP64Index;
		uint16_t ZIP64Size;

		if ([stream readLittleEndianInt32] != 0x04034B50)
			@throw [OFInvalidFormatException exception];

		_minVersionNeeded = [stream readLittleEndianInt16];
		_generalPurposeBitFlag = [stream readLittleEndianInt16];

		extraFieldLength = [stream readLittleEndianInt16];
		encoding = (_generalPurposeBitFlag & (1 << 11)
		    ? OF_STRING_ENCODING_UTF_8
		    : OF_STRING_ENCODING_CODEPAGE_437);

		_fileName = [[stream readStringWithLength: fileNameLength
						 encoding: encoding] copy];
		_extraField =
		    [[stream readDataWithCount: extraFieldLength] copy];
		if (extraFieldLength > 0)
			extraField = [[[stream readDataWithCount:
			    extraFieldLength] mutableCopy] autorelease];

		of_zip_archive_entry_extra_field_find(_extraField,
		    OF_ZIP_ARCHIVE_ENTRY_EXTRA_FIELD_ZIP64, &ZIP64, &ZIP64Size);
		    OF_ZIP_ARCHIVE_ENTRY_EXTRA_FIELD_ZIP64, &ZIP64Size);

		if (ZIP64 != NULL) {
		if (ZIP64Index != OF_NOT_FOUND) {
			const uint8_t *ZIP64 =
			    [extraField itemAtIndex: ZIP64Index];

			if (_uncompressedSize == 0xFFFFFFFF)
				_uncompressedSize = of_zip_archive_read_field64(
				    &ZIP64, &ZIP64Size);
			if (_compressedSize == 0xFFFFFFFF)
				_compressedSize = of_zip_archive_read_field64(
				    &ZIP64, &ZIP64Size);

			if (ZIP64Size > 0)
				@throw [OFInvalidFormatException exception];
		}

			[extraField removeItemsInRange:
			    of_range(ZIP64Index - 4, ZIP64Size + 4)];
		}

		[extraField makeImmutable];
		_extraField = [extraField copy];

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}