On Tue, 18 Feb 2025 07:31:59 -0600 Dirk Eddelbuettel <e...@debian.org> wrote:
> I have no idea. They have not communicated with me. I am only the > relevant author so why whould they. That's unfortunate. I've just fed the RcppArmadillo-sparseMatrix vignette to VirusTotal, and, indeed, there is one match: https://www.virustotal.com/gui/url/f8d4551cce926dbe1ca4ade853038e9b358a65ce06e448f83825247df0c9f375 > Can you translate that tip into an actionable `sed` (or, of course > `Rscript` or `r`) expression I could add to the Makefile? It's probably doable with `sed`, but here's R: contents <- readBin(pdf_file, raw(), file.size(pdf_file)) # both PDFTeX and QPDF add a 4-byte comment here that can be changed stopifnot(grepl( '^%PDF-1.5\n%[^\n]{4}\n$', rawToChar(contents[1:15]), useBytes = TRUE )) # so replace it with spaces contents[11:14] <- charToRaw(' ') writeBin(contents, pdf_file) No matches after the four-byte change: https://www.virustotal.com/gui/file/e0bf6c55e5d1377c3375b962b24bbaaead4424d0bf5f9bcdaadd47c39b36abe7 Your bytes match what QPDF usually writes when re-compressing a vignette [*], not PDFTeX's "PTEX" + (not xor) 128. This is also to be expected. -- Best regards, Ivan [*] https://github.com/qpdf/qpdf/blob/8a1d34bb74e6bae1b57076485386fc56e7c22aaa/libqpdf/QPDFWriter.cc#L2321-L2323 ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
