QuietUnrar/Carthage/Checkouts/UnrarKit/Classes/URKFileInfo.m

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//
// URKFileInfo.m
// UnrarKit
//
#import "URKFileInfo.h"
#import "UnrarKitMacros.h"
#import "NSString+UnrarKit.h"
@implementation URKFileInfo
#pragma mark - Initialization
+ (instancetype) fileInfo:(struct RARHeaderDataEx *)fileHeader {
return [[URKFileInfo alloc] initWithFileHeader:fileHeader];
}
- (instancetype)initWithFileHeader:(struct RARHeaderDataEx *)fileHeader
{
URKCreateActivity("Init URKFileInfo");
if ((self = [super init])) {
URKLogDebug("Setting file info fields");
_filename = [NSString stringWithUnichars:fileHeader->FileNameW];
_archiveName = [NSString stringWithUnichars:fileHeader->ArcNameW];
_uncompressedSize = (long long) fileHeader->UnpSizeHigh << 32 | fileHeader->UnpSize;
_compressedSize = (long long) fileHeader->PackSizeHigh << 32 | fileHeader->PackSize;
_compressionMethod = fileHeader->Method;
_hostOS = fileHeader->HostOS;
_timestamp = [self parseDOSDate:fileHeader->FileTime];
_CRC = fileHeader->FileCRC;
//_fileContinuedFromPreviousVolume = fileHeader->Flags & (1 << 0)
//_fileContinuedOnNextVolume = fileHeader->Flags & (1 << 1)
_isEncryptedWithPassword = fileHeader->Flags & (1 << 2);
//_fileHasComment = fileHeader->Flags & (1 << 3)
_isDirectory = fileHeader->Flags & RHDF_DIRECTORY;
}
return self;
}
#pragma mark - Private Methods
- (NSDate *)parseDOSDate:(NSUInteger)dosTime
{
URKCreateActivity("-parseDOSDate:");
if (dosTime == 0) {
URKLogDebug("DOS Time == 0");
return nil;
}
// MSDOS Date Format Parsing specified at this URL:
// http://www.cocoanetics.com/2012/02/decompressing-files-into-memory/
int year = ((dosTime>>25) & 127) + 1980; // 7 bits
int month = (dosTime>>21) & 15; // 4 bits
int day = (dosTime>>16) & 31; // 5 bits
int hour = (dosTime>>11) & 31; // 5 bits
int minute = (dosTime>>5) & 63; // 6 bits
int second = (dosTime & 31) * 2; // 5 bits
NSDateComponents *components = [[NSDateComponents alloc] init];
components.year = year;
components.month = month;
components.day = day;
components.hour = hour;
components.minute = minute;
components.second = second;
return [[NSCalendar currentCalendar] dateFromComponents:components];
}
@end