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#import <Foundation/Foundation.h>
#import "LzxArchive.h"
#import "FileInfo.h"
#import "NSString+Custom.h"
#import "Preferences.h"
#import "NSArray+Custom.h"
@interface LzxArchive (PrivateAPI)
- (NSData *)dataByRunningLzx;
@end
@implementation LzxArchive : Archive
/**
* register our supported file extensions with our superclass.
*/
+ (void)initialize
{
[self registerFileExtension:@"lzx" forArchiveClass:self];
}
+ (NSString *)unarchiveExecutable
{
return [Preferences lzxExecutable];
}
/**
* lzx archives can only be unpacked with path info
*/
+ (BOOL)canExtractWithoutFullPath
{
return NO;
}
/**
* lzx archives <em>do not</em> contain info about compression ratio.
*/
+ (BOOL)hasRatio;
{
return NO;
}
+ (ArchiveType)archiveType
{
return LZX;
}
//------------------------------------------------------------------------------
// expanding the archive
//------------------------------------------------------------------------------
/**
* the unlzx command does not allow to unpack single files from the archive. We
* resort to unpacking the entire archive instead ...
*/
- (int)expandFiles:(NSArray *)files withPathInfo:(BOOL)usePathInfo toPath:(NSString *)path
{
NSArray *args;
args = [NSArray arrayWithObjects:@"-x", @"--", [self path], nil];
return [[self class] runUnarchiverWithArguments:args inDirectory:path];
}
- (NSArray *)listContents
{
NSEnumerator *cursor;
NSString *line;
NSMutableArray *results = [NSMutableArray array];
NSData *data = [self dataByRunningLzx];
NSString *string = [[[NSString alloc] initWithData:data
encoding:NSASCIIStringEncoding] autorelease];
NSArray *lines = [string componentsSeparatedByString:@"\n"];
// take out first 2 lines (header) and last 2 lines (footer)
lines = [lines subarrayWithRange:NSMakeRange(2, [lines count] - 2)];
lines = [lines subarrayWithRange:NSMakeRange(0, [lines count] - 3)];
cursor = [lines objectEnumerator];
while ((line = [cursor nextObject]) != nil)
{
NSArray *components;
int length;
NSString *path, *dateString, *timeString;
NSCalendarDate *date;
FileInfo *info;
components = [line componentsSeparatedByString:@" "];
components = [components arrayByRemovingEmptyStrings];
timeString = [components objectAtIndex:2];
if ([timeString isEqual:@"Merged"])
{
// skip lines that continue "Merged" in the time column, they contain no usable info
continue;
}
length = [[components objectAtIndex:0] intValue];
path = [components objectAtIndex:5];
if ([path hasPrefix:@"\""])
{
path = [path substringFromIndex:1];
}
if ([path hasSuffix:@"\""])
{
path = [path substringToIndex:[path length] - 1];
}
dateString = [components objectAtIndex:3];
dateString = [NSString stringWithFormat:@"%@ %@", dateString, timeString];
date = [NSCalendarDate dateWithString:dateString calendarFormat:@"%d-%b-%Y %H:%M:%S"];
info = [FileInfo newWithPath:path date:date size:[NSNumber numberWithInt:length]];
[results addObject:info];
}
return results;
}
//------------------------------------------------------------------------------
// private API
//------------------------------------------------------------------------------
- (NSData *)dataByRunningLzx
{
NSData *data;
NSArray *args = [NSArray arrayWithObjects:@"-v", @"--", [self path], nil];
data = [self dataByRunningUnachiverWithArguments:args];
return data;
}
@end
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