readBin() can read beyond end of raw vector

Thanks for the report. BTW, this is not new in 2.5.0 alpha AFAICS.

It needs a tiny change in the C function readRaw: fixed in SVN now.

FYI, in R v2.5.0 alpha, readBin() can be used to read beyond end of raw vector:

bfr <- as.raw(1:10)
readBin(con=bfr, what="raw", n=20)
[1] 01 02 03 04 05 06 07 08 09 0a

readBin(con=bfr, what="integer", n=20)
[1]  67305985 134678021

readBin(con=bfr, what="integer", size=4, n=20)
[1]  67305985 134678021

readBin(con=bfr, what="integer", size=2, n=20)
[1]    513   1027   1541   2055   2569  29537  29541      0      9  16384
[11]   9376    453 -18208    505 -18328    505      9      0      0      0

readBin(con=bfr, what="integer", size=1, n=20)
[1]   1   2   3   4   5   6   7   8   9  10  97 115 101 115   0   0   9   0   0
[20]  64

sessionInfo()
R version 2.5.0 alpha (2007-04-04 r41043)
i386-pc-mingw32

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MON
ETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
[7] "base"

/Henrik

______________________________________________
R-devel at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

readBin() can read beyond end of raw vector

Thread (2 messages)