pdfGetDocumentID

int32_t __stdcall pdfGetDocumentID(PPDF IPDF, int32_t Index);

function pdfGetDocumentID(const IPDF: PPDF; Index: Integer): Integer; stdcall;

Purpose. Return a deterministic 32-bit integer derived from the document's /ID array entry at Index — a compact numeric fingerprint, distinct from pdfGetDocumentIdentifier's full hex/raw string form below.

Description. Takes the first 4 bytes of /ID[Index] (big-endian packed into a 32-bit value); an /ID entry shorter than 4 bytes is zero-padded on the low end (missing trailing bytes become 0, not a failure).

Parameters.

Return value. The derived 32-bit value; 0 if IPDF invalid or no /ID exists yet.

See also. pdfGetDocumentIdentifier.

C# (P/Invoke)

public static extern int pdfGetDocumentID(IntPtr IPDF, int Index);