C Requires Chilkat v11.0.0+

Find ZIP Entries Matching a Wildcard Pattern Using EntryMatching

See more Zip Examples

This example demonstrates how to use the EntryMatching method to find ZIP entries whose stored paths match a wildcard pattern.

The wildcard character * matches zero or more characters. The comparison is performed against the full stored path within the ZIP archive.

This method is useful for:

• Finding files having a particular extension
• Locating files within specific subdirectories
• Searching ZIP archives without manually iterating through every entry

Suppose the ZIP archive contains:

docs/
docs/readme.txt
docs/manual.pdf
images/logo.png
images/banner.jpg
data/config/settings.json

Notice that the ZIP archive contains an explicit directory entry named docs/. ZIP archives may optionally contain separate directory entries in addition to file entries.

When searching with the pattern docs/*, the first matching entry could therefore be the directory entry docs/ rather than a file contained within that directory.

The example searches for:

• The first .png file
• The first entry beneath the docs directory
• The first JSON file anywhere within the ZIP archive

C

#include <C_CkZip.h>
#include <C_CkZipEntry.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkZip zip;
    HCkZipEntry entry;

    success = FALSE;

    //  Open an existing ZIP archive.
    zip = CkZip_Create();

    success = CkZip_OpenZip(zip,"example.zip");
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        return;
    }

    entry = CkZipEntry_Create();

    //  ------------------------------------------------------------
    //  Find the first .png file in the ZIP archive.

    success = CkZip_EntryMatching(zip,"*.png",entry);

    if (success == TRUE) {
        printf("Found PNG file:\n");
        printf("  %s\n",CkZipEntry_fileName(entry));
        printf("\n");
    }

    //  ------------------------------------------------------------
    //  Find the first entry beneath the docs directory.
    //  
    //  Note: ZIP archives may optionally contain explicit directory
    //  entries such as "docs/" in addition to file entries.
    //  Therefore, the first matching entry could be the directory
    //  itself rather than a file contained within the directory.

    success = CkZip_EntryMatching(zip,"docs/*",entry);

    if (success == TRUE) {
        printf("First matching docs entry:\n");
        printf("  %s\n",CkZipEntry_fileName(entry));
        printf("  IsDirectory = %d\n",CkZipEntry_getIsDirectory(entry));
        printf("\n");
    }

    //  ------------------------------------------------------------
    //  Find the first JSON file anywhere in the ZIP archive.

    success = CkZip_EntryMatching(zip,"*.json",entry);

    if (success == TRUE) {
        printf("Found JSON file:\n");
        printf("  %s\n",CkZipEntry_fileName(entry));
        printf("\n");
    }

    //  ------------------------------------------------------------
    //  The matching is performed against the full stored ZIP path.
    //  For example:
    //  
    //      docs/readme.txt
    //      images/logo.png
    //      data/config/settings.json
    //  
    //  The wildcard '*' matches zero or more characters.

    CkZip_CloseZip(zip);

    printf("Done.\n");


    CkZip_Dispose(zip);
    CkZipEntry_Dispose(entry);

    }