R/is.readable.file.R

In xpose4: Diagnostics for Nonlinear Mixed-Effect Models

# Xpose 4
# An R-based population pharmacokinetic/
# pharmacodynamic model building aid for NONMEM.
# Copyright (C) 1998-2004 E. Niclas Jonsson and Mats Karlsson.
# Copyright (C) 2005-2008 Andrew C. Hooker, Justin J. Wilkins, 
# Mats O. Karlsson and E. Niclas Jonsson.
# Copyright (C) 2009-2010 Andrew C. Hooker, Mats O. Karlsson and 
# E. Niclas Jonsson.

# This file is a part of Xpose 4.
# Xpose 4 is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation, either version 3
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License
# along with this program.  A copy can be cound in the R installation
# directory under \share\licenses. If not, see http://www.gnu.org/licenses/.

#' @rdname check.vars

"is.readable.file"  <- function(filename )
{

  ## If we are not dealing with R -> Splus
  if(is.null(version$language)) {
    cat("This version of Xpose needs to be run with R")
    ## if(platform() == "WIN386") {
    ##   access(filename, 4) == 0
    ## } else {
    ##   filename <- paste("'", filename, "'", sep = "")
    ##   sapply(paste("test -f", filename, "-a -r", filename), unix,
    ##          output = F) == 0
    ## }
  } else {
    return(file.exists(filename)[1])
  }
    
}