Unicode C

Find ZIP Entries Matching a Wildcard Pattern Using EntryMatching

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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

Unicode C

#include <C_CkZipW.h>
#include <C_CkZipEntryW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkZipW zip;
    HCkZipEntryW entry;

    success = FALSE;

    success = FALSE;

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

    success = CkZipW_OpenZip(zip,L"example.zip");
    if (success == FALSE) {
        wprintf(L"%s\n",CkZipW_lastErrorText(zip));
        CkZipW_Dispose(zip);
        return;
    }

    entry = CkZipEntryW_Create();

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

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

    if (success == TRUE) {
        wprintf(L"Found PNG file:\n");
        wprintf(L"  %s\n",CkZipEntryW_fileName(entry));
        wprintf(L"\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 = CkZipW_EntryMatching(zip,L"docs/*",entry);

    if (success == TRUE) {
        wprintf(L"First matching docs entry:\n");
        wprintf(L"  %s\n",CkZipEntryW_fileName(entry));
        wprintf(L"  IsDirectory = %d\n",CkZipEntryW_getIsDirectory(entry));
        wprintf(L"\n");
    }

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

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

    if (success == TRUE) {
        wprintf(L"Found JSON file:\n");
        wprintf(L"  %s\n",CkZipEntryW_fileName(entry));
        wprintf(L"\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.

    CkZipW_CloseZip(zip);

    wprintf(L"Done.\n");


    CkZipW_Dispose(zip);
    CkZipEntryW_Dispose(entry);

    }