R/hash.R

In rdpeng/filehash: Simple Key-Value Database

##########################################################################
## Copyright (C) 2006-2023, Roger D. Peng <roger.peng @ austin.utexas.edu>
##     
## 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.
## 
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA
##########################################################################

#' @importFrom digest digest
sha1 <- function(object, skip = 14L) {
        bytes <- serialize(object, NULL)
        digest(bytes, algo = "sha1", skip = skip, serialize = FALSE)
}


#' @importFrom digest digest
sha1_file <- function(filename, skip = 0L) {
	digest(filename, algo = "sha1", file = TRUE)
}