Subject: Fortran character strings
From: Prof Brian Ripley (firstname.lastname@example.org)
Date: Mon 06 Sep 1999 - 22:54:37 EST
Has anyone ever successfully used Fortran character strings with R?
R C Fortran
integer int * integer
character char ** [compiler dependent]
Character strings are passed as C arrays of character
strings to Fortran: the first string may be usable if
its length is passed separately.
and I have been taking a look. The linkage sends char ** to Fortran.
On the other hand, INTPR and DBLEPR assume Fortran character strings
are char *. On all my systems DBLEPR works and .Fortran does not,
but I do know of one compiler (Watcom Fortran for Windows NT) where the
linkage really is equivalent to char **.
Fortran in S takes the first string in a character vector and passes that as
char * (except on the Watcom-compiled Windows version), as far as I
can deduce without the source code.
I think we should either ban character strings in .Fortran or follow
the S prototype unless someone has a way around this. With different
compilers on the same platform having different conventions whatever we
do (except a ban) will be compiler-dependent.
-- Brian D. Ripley, email@example.com 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 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: firstname.lastname@example.org _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
This archive was generated by hypermail 2b25 : Tue 04 Jan 2000 - 14:16:08 EST