(C) Generate ULID

See more ULID/UUID Examples

Generate a ULID using a specified timestamp or the current system date timestamp.

Important: Chilkat's ULID functionality was introduced in v9.5.0.94.

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#include <C_CkDateTime.h>

void ChilkatSample(void)
    {
    HCkDateTime dt;
    BOOL utc;
    const char *ulid;
    HCkDateTime dt2;

    dt = CkDateTime_Create();

    // Set dt to the current system date/time.
    CkDateTime_SetFromCurrentSystemTime(dt);

    // Generate a ULID for the current UTC date/time.
    // (i.e. the current UTC UNIX-time)
    utc = TRUE;
    ulid = CkDateTime_ulidGenerate(dt,utc);
    printf("%s\n",ulid);

    // example result: 01GRGCH4J88RECEN4D4VK4F629

    // Generate a ULID using the local timezone's current time.
    utc = FALSE;
    ulid = CkDateTime_ulidGenerate(dt,utc);
    printf("%s\n",ulid);

    // example result: 01GRH14AA82EY9A7S99YYF2QDY

    // -----------------------------------------------
    // To generate a ULID using a specific UNIX timestamp

    // For example, the Unix timestamp for Sun, 05 Feb 2023 14:57:46 GMT
    // is 1675609066

    // For more information about the Epoch Unix Timestamp, see Epoch Unix Timestamp

    // To generate a ULID from a specified date/time, set the CkDateTime and then generate the ULID.
    dt2 = CkDateTime_Create();
    utc = TRUE;
    CkDateTime_SetFromUnixTime(dt2,utc,1675609066);
    ulid = CkDateTime_ulidGenerate(dt2,utc);
    printf("%s\n",ulid);

    // example result: 01GRH1AJGG3P5K04DJHN3QJCX3


    CkDateTime_Dispose(dt);
    CkDateTime_Dispose(dt2);

    }