Nothing
# Logging system
#
# Author: Renaud Gaujoux
# Creation: 25 Apr 2012
###############################################################################
#' @include utils.R
NULL
#' Internal verbosity option
#' @param val logical that sets the verbosity level.
#' @return the old verbose level
#' @keywords internal
lverbose <- local({
.val <- NA
function(val){
if( missing(val) ) return(.val)
oval <- .val
.val <<- val
invisible(oval)
}
})
#' Tells if all verbose messages should be
#' @rdname lverbose
lsilent <- function(){
l <- lverbose()
is.na(l) || l == 0L
}
#' Tells if verbosity is on.
#' @rdname lverbose
is.verbose <- function(){
l <- lverbose()
!is.na(l) && l >= 0L
}
#' Prints out a message (on sdtout) if verbose mode is on.
#'
#' @param ... arguments passed to \code{...} \code{\link{cat}}
#' @param appendLF logical indicating if an endline character should be appended
#' at the end of the message. Passed to \code{\link{cat}}.
#' @rdname lverbose
#'
vmessage <- function(...){
lmessage(..., level=1L)
}
#' Prints out a message (on sdtout) if the verbosity level is greater than a
#' given value.
#'
#' @param level verbosity level threshold (numeric value) above which the
#' message should be printed out.
#' This threshold is compared with the current verbosity level as returned by
#' \code{lverbose}.
#' @param ... arguments passed to \code{...} \code{\link{lmessage}} or \code{\link{cat}}
#' @param appendLF logical indicating if an endline character should be appended
#' at the end of the message. Passed to \code{\link{cat}}.
#'
#' @rdname lverbose
#'
lmessage <- function(..., level=1L, appendLF=TRUE){
l <- lverbose()
if( !is.na(l) && l >= level ) cat(..., if(appendLF) "\n", sep='')
}
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