(C) Get a Structure Property Value from XMP

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and fetch the value of a structure property, such as the Iptc4xmpCore:CiTelWork (found within the Iptc4xmpCore:CreatorContactInfo structure).

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#include <C_CkXmp.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkXmp xmp;
    BOOL success;
    HCkXml xml;
    const char *propVal;

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

    xmp = CkXmp_Create();

    // Load a JPG or TIF image file.
    // Sample JPG's with XMP metadata may be found at:
    // http://www.chilkatsoft.com/testData/xmp/sample1.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample2.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample3.jpg
    success = CkXmp_LoadAppFile(xmp,"sample1.jpg");
    if (success != TRUE) {
        printf("%s\n",CkXmp_lastErrorText(xmp));
        CkXmp_Dispose(xmp);
        return;
    }

    printf("Num embedded XMP docs: %d\n",CkXmp_getNumEmbedded(xmp));

    // Assuming there is at least one, get the 1st.
    // (There is typically never more than one, but theoretically it's possible.)
    xml = CkXmp_GetEmbedded(xmp,0);
    if (CkXmp_getLastMethodSuccess(xmp) == TRUE) {

        propVal = CkXmp_getStructValue(xmp,xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiTelWork");
        if (CkXmp_getLastMethodSuccess(xmp) != TRUE) {
            printf("Not found.\n");
        }
        else {
            printf("%s\n",propVal);
        }

        CkXml_Dispose(xml);

    }
    else {
        printf("%s\n",CkXmp_lastErrorText(xmp));
    }



    CkXmp_Dispose(xmp);

    }