(Objective-C) Iterate over Matching Filenames

Iterates over files within a .zip that match a pattern. In this case, the pattern is "*.pem". This example will open a .zip containing files of type .txt, .cer, .pem, and possibly others, and will iterate over only the .pem files.

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#import <CkoZip.h>
#import <CkoZipEntry.h>
#import <NSString.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoZip *zip = [[CkoZip alloc] init];

// Open a .zip containing PEM files, among other things..
BOOL success = [zip OpenZip: @"qa_data/certs/thawte-roots.zip"];
if (success != YES) {
    NSLog(@"%@",zip.LastErrorText);
    return;
}

CkoZipEntry *entry = [zip FirstMatchingEntry: @"*.pem"];
if (zip.LastMethodSuccess != YES) {
    NSLog(@"%@",@"No PEM entries found.");
    return;
}

CkoZipEntry *nextEntry = 0;
NSString *pemStr = 0;

BOOL bContinue = YES;
while ((bContinue == YES)) {

    NSLog(@"%@%@",@"Entry: ",entry.FileName);

    // Get the uncommpressed contents of the entry:
    pemStr = [entry UnzipToString: [NSNumber numberWithInt: 0] srcCharset: @"utf-8"];
    NSLog(@"%@",pemStr);

    nextEntry = [entry NextMatchingEntry: @"*.pem"];
    bContinue = entry.LastMethodSuccess;

    entry = nextEntry;
}