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