Monkeybread Software - DynaPDF Manual

DynaPDF Manual - Page 453

Function Reference

Page 453 of 860

GetInIsCollection

Syntax:

SI32 pdfGetInIsCollection(

const PPDF* IPDF) // Instance pointer

The function checks whether the currently opened import file is a portable collection. See

CreateCollection() for further information.

Return values:

If the function succeeds the return value is either 0 or 1 depending on whether the opened PDF file

is a portable collection. If the function fails the return value is a negative error code.

GetInIsEncrypted

Syntax:

SI32 pdfGetInIsEncrypted(

const PPDF* IPDF) // Instance pointer

The function checks whether the currently opened import file is encrypted.

Return values:

If the function succeeds the return value is either 0 or 1 depending on whether the opened PDF file

is encrypted. If the function fails the return value is a negative error code.

GetInIsSigned

Syntax:

SI32 pdfGetInIsSigned(

const PPDF* IPDF) // Instance pointer

This function can be used to determine whether a PDF file contains a digital signature. The PDF file

must be opened with OpenImportFile() or OpenImportBuffer() beforehand.

The function checks only whether the signature flag is set in the global AcroForm object. Since not

all PDF libraries set the signature flag, it is not guaranteed that the file contains no signature if the

return value is false.

The only safe way to check for signatures is to import the file and search for deleted signature fields

with GetFieldEx(). If the member ISignature is set and if the member Contents of the TPDFSigDict

structure is non-NULL then the file contains a signature. See GetFieldEx() and GetSigDict() for

further information.

Return values:

If the PDF file contains a digital signature the return value is 1. If the file was not digitally signed the

function returns 0. A negative error code is returned on failure.

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