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# Copyright (C) 2008-2009 - INRIA - Michael Baudin
# Copyright (C) 2009-2010 - DIGITEO - Michael Baudin
# Copyright (C) 2010-2022 - Sebastien Bihorel
#
# This file must be used under the terms of the CeCILL.
# This source file is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at
# http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
#
# This source code is a R port of the neldermead component
# originally written by Michael Baudin for Scilab :
# "Nelder-Mead User's Manual", 2010, Consortium Scilab - Digiteo,
# Michael Baudin, http://wiki.scilab.org/The_Nelder-Mead_Component
optimget <- function(options=NULL, key=NULL, value=NULL){
if (is.null(options)){
stop('optimget: No option list provided.',
call.=FALSE)
}
if (is.null(key)){
stop('optimget: No option key provided.',
call.=FALSE)
}
if (length(key)>1){
stop('optimget: More than one key provided.',
call.=FALSE)
}
# Search the field by index
fields <- names(options)
# Search for the given key in the list of available fields.
# Use a regexp which ignores the case
r <- grep(toupper(key),toupper(fields))
opsize <- size(r,2)
if (opsize==0){
cat(sprintf('optimget: No match found between key (%s) and options elements (%s).\n',
key, paste(names(options),collapse=', ')))
return(value)
} else if (opsize!=1){
matching <- paste(r[1:opsize], collapse=' ')
stop(sprintf('optimget: Ambiguous property name matches several fields %s\n',
matching),
call.=FALSE)
}
# Get the matching field
name <- fields[r[1]]
val <- options[[name]]
# When the value is given and field is empty, return the value
if (!is.null(value) & is.null(val)){
val <- value
}
return(val)
}
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