| # File src/library/base/R/dump.R |
| # Part of the R package, https://www.R-project.org |
| # |
| # Copyright (C) 1995-2016 The R Core Team |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2 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 General Public License for more details. |
| # |
| # A copy of the GNU General Public License is available at |
| # https://www.R-project.org/Licenses/ |
| |
| dump <- function (list, file = "dumpdata.R", append = FALSE, |
| control = "all", envir = parent.frame(), |
| evaluate = TRUE) |
| { |
| if(is.character(file)) { |
| ## avoid opening a file if there is nothing to dump |
| ex <- sapply(list, exists, envir=envir) |
| if(!any(ex)) return(invisible(character())) |
| if(nzchar(file)) { |
| file <- file(file, if(append) "a" else "w") |
| on.exit(close(file), add = TRUE) |
| } else file <- stdout() |
| } |
| opts <- .deparseOpts(control) |
| .Internal(dump(list, file, envir, opts, evaluate)) |
| } |
| |