Load a MessageSet from a Compact String

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Demonstrates the Chilkat MessageSet.FromCompactString method, which clears the set and loads message identifiers from compact IMAP message-set syntax. The only argument is the compact string: a colon specifies an inclusive ascending range, and commas separate values or ranges. This example loads 1:5,8:10 and prints the result as a comma-separated list.

Background: Compact message-set syntax is how IMAP itself expresses groups of messages — 1:5,8:10 is far more concise than listing every id. FromCompactString is the inverse of ToCompactString: it parses that text into a set you can pass to Imap methods. Duplicates are removed, identifiers are sorted ascending, and the existing HasUids setting is preserved. Note the string carries only the numbers — it does not record whether they are UIDs or sequence numbers.

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#include <C_CkMessageSet.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMessageSet msgSet;
    const char *csv;

    success = FALSE;

    //  Demonstrates the MessageSet.FromCompactString method, which loads a set of message
    //  identifiers from compact IMAP message-set syntax.  The only argument is the compact string.
    //  A colon specifies an inclusive range, and commas separate values or ranges.

    msgSet = CkMessageSet_Create();

    //  Load a compact message set.  "1:5,8:10" expands to 1,2,3,4,5,8,9,10.
    success = CkMessageSet_FromCompactString(msgSet,"1:5,8:10");
    if (success == FALSE) {
        printf("%s\n",CkMessageSet_lastErrorText(msgSet));
        CkMessageSet_Dispose(msgSet);
        return;
    }

    printf("Count: %d\n",CkMessageSet_getCount(msgSet));

    //  Show the loaded identifiers in comma-separated form.
    csv = CkMessageSet_toCommaSeparatedStr(msgSet);
    printf("%s\n",csv);


    CkMessageSet_Dispose(msgSet);

    }