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Optimize "locateFileInZip" #2

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merged 1 commit into from May 16, 2012
Merged

Optimize "locateFileInZip" #2

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1 change: 1 addition & 0 deletions Objective-Zip/ZipFile.h
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Expand Up @@ -57,6 +57,7 @@ typedef enum {
@interface ZipFile : NSObject { @interface ZipFile : NSObject {
NSString *_fileName; NSString *_fileName;
ZipFileMode _mode; ZipFileMode _mode;
NSDictionary *contents;


@private @private
zipFile _zipFile; zipFile _zipFile;
Expand Down
36 changes: 33 additions & 3 deletions Objective-Zip/ZipFile.m
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Expand Up @@ -39,7 +39,6 @@


#define FILE_IN_ZIP_MAX_NAME_LENGTH (256) #define FILE_IN_ZIP_MAX_NAME_LENGTH (256)



@implementation ZipFile @implementation ZipFile




Expand All @@ -55,6 +54,25 @@ - (id) initWithFileName:(NSString *)fileName mode:(ZipFileMode)mode {
NSString *reason= [NSString stringWithFormat:@"Can't open '%@'", _fileName]; NSString *reason= [NSString stringWithFormat:@"Can't open '%@'", _fileName];
@throw [[[ZipException alloc] initWithReason:reason] autorelease]; @throw [[[ZipException alloc] initWithReason:reason] autorelease];
} }

unzGoToFirstFile(_unzFile);

NSMutableDictionary* dic = [NSMutableDictionary dictionary];

do {
FileInZipInfo* info = [self getCurrentFileInZipInfo];
unz_file_pos pos;
int err = unzGetFilePos(_unzFile, &pos);
if (err == UNZ_OK) {
[dic setObject:[NSArray arrayWithObjects:
[NSNumber numberWithLong:pos.pos_in_zip_directory],
[NSNumber numberWithLong:pos.num_of_file],
nil] forKey:info.name];
}
} while (unzGoToNextFile (_unzFile) != UNZ_END_OF_LIST_OF_FILE);

contents = [dic retain];

break; break;


case ZipFileModeCreate: case ZipFileModeCreate:
Expand Down Expand Up @@ -85,6 +103,7 @@ - (id) initWithFileName:(NSString *)fileName mode:(ZipFileMode)mode {


- (void) dealloc { - (void) dealloc {
[_fileName release]; [_fileName release];
[contents release];
[super dealloc]; [super dealloc];
} }


Expand Down Expand Up @@ -269,8 +288,19 @@ - (BOOL) locateFileInZip:(NSString *)fileNameInZip {
@throw [[[ZipException alloc] initWithReason:reason] autorelease]; @throw [[[ZipException alloc] initWithReason:reason] autorelease];
} }


int err= unzLocateFile(_unzFile, [fileNameInZip cStringUsingEncoding:NSUTF8StringEncoding], 1); //int err= unzLocateFile(_unzFile, [fileNameInZip cStringUsingEncoding:NSUTF8StringEncoding], 1);
if (err == UNZ_END_OF_LIST_OF_FILE)
NSArray* info = [contents objectForKey:fileNameInZip];

if (!info) return NO;

unz_file_pos pos;
pos.pos_in_zip_directory = [[info objectAtIndex:0] longValue];
pos.num_of_file = [[info objectAtIndex:1] longValue];

int err = unzGoToFilePos(_unzFile, &pos);

if (err == UNZ_END_OF_LIST_OF_FILE)
return NO; return NO;


if (err != UNZ_OK) { if (err != UNZ_OK) {
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