R : Copyright 2005, The R Foundation for Statistical Computing
Version 2.1.1  (2005-06-20), ISBN 3-900051-07-0

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> ### * <HEADER>
> ###
> attach(NULL, name = "CheckExEnv")
> assign(".CheckExEnv", as.environment(2), pos = length(search())) # base
> ## add some hooks to label plot pages for base and grid graphics
> setHook("plot.new", ".newplot.hook")
> setHook("persp", ".newplot.hook")
> setHook("grid.newpage", ".gridplot.hook")
> 
> assign("cleanEx",
+        function(env = .GlobalEnv) {
+ 	   rm(list = ls(envir = env, all.names = TRUE), envir = env)
+            RNGkind("default", "default")
+ 	   set.seed(1)
+    	   options(warn = 1)
+ 	   delayedAssign("T", stop("T used instead of TRUE"),
+ 		  assign.env = .CheckExEnv)
+ 	   delayedAssign("F", stop("F used instead of FALSE"),
+ 		  assign.env = .CheckExEnv)
+ 	   sch <- search()
+ 	   newitems <- sch[! sch %in% .oldSearch]
+ 	   for(item in rev(newitems))
+                eval(substitute(detach(item), list(item=item)))
+ 	   missitems <- .oldSearch[! .oldSearch %in% sch]
+ 	   if(length(missitems))
+ 	       warning("items ", paste(missitems, collapse=", "),
+ 		       " have been removed from the search path")
+        },
+        env = .CheckExEnv)
> assign("..nameEx", "__{must remake R-ex/*.R}__", env = .CheckExEnv) # for now
> assign("ptime", proc.time(), env = .CheckExEnv)
> grDevices::postscript("digest-Examples.ps")
> assign("par.postscript", graphics::par(no.readonly = TRUE), env = .CheckExEnv)
> options(contrasts = c(unordered = "contr.treatment", ordered = "contr.poly"))
> options(warn = 1)    
> library('digest')
> 
> assign(".oldSearch", search(), env = .CheckExEnv)
> assign(".oldNS", loadedNamespaces(), env = .CheckExEnv)
> cleanEx(); ..nameEx <- "digest"
> 
> ### * digest
> 
> flush(stderr()); flush(stdout())
> 
> ### Name: digest
> ### Title: Create hash function digests for arbitrary R objects
> ### Aliases: digest
> ### Keywords: misc
> 
> ### ** Examples
> 
> 
> ## Standard RFC 1321 test vectors
> md5Input <-
+   c("",
+     "a",
+     "abc",
+     "message digest",
+     "abcdefghijklmnopqrstuvwxyz",
+     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+     paste("12345678901234567890123456789012345678901234567890123456789012",
+           "345678901234567890", sep=""))
> md5Output <-
+   c("d41d8cd98f00b204e9800998ecf8427e",
+     "0cc175b9c0f1b6a831c399e269772661",
+     "900150983cd24fb0d6963f7d28e17f72",
+     "f96b697d7cb7938d525a2f31aaf161d0",
+     "c3fcd3d76192e4007dfb496cca67e13b",
+     "d174ab98d277d9f5a5611c2c9f419d9f",
+     "57edf4a22be3c955ac49da2e2107b67a")
> 
> for (i in seq(along=md5Input)) {
+   md5 <- digest(md5Input[i], serialize=FALSE)
+   stopifnot(identical(md5, md5Output[i]))
+ }
> 
> sha1Input <-
+   c("abc",
+     "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+     NULL)
> sha1Output <- 
+   c("a9993e364706816aba3e25717850c26c9cd0d89d",
+     "84983e441c3bd26ebaae4aa1f95129e5e54670f1",
+     "34aa973cd4c4daa4f61eeb2bdbad27316534016f")
> 
> for (i in seq(along=sha1Input)) {
+   sha1 <- digest(sha1Input[i], algo="sha1", serialize=FALSE)
+   stopifnot(identical(sha1, sha1Output[i]))
+ }
> 
> crc32Input <-
+   c("abc",
+     "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+     NULL)
> crc32Output <- 
+   c("352441c2",
+     "171a3f5f",
+     "2ef80172")
> 
> for (i in seq(along=crc32Input)) {
+   crc32 <- digest(crc32Input[i], algo="crc32", serialize=FALSE)
+   stopifnot(identical(crc32, crc32Output[i]))
+ }
> 
> 
> # one of the FIPS-
> sha1 <- digest("abc", algo="sha1", serialize=FALSE)
> stopifnot(identical(sha1, "a9993e364706816aba3e25717850c26c9cd0d89d"))
> 
> # example of a digest of a standard R list structure
> digest(list(LETTERS, data.frame(a=letters[1:5], b=matrix(1:10,ncol=2))))
[1] "c0c49c678d373c1668ee6da9bf8d6845"
> 
> 
> 
> ### * <FOOTER>
> ###
> cat("Time elapsed: ", proc.time() - get("ptime", env = .CheckExEnv),"\n")
Time elapsed:  0.05 0.03 0.08 0 0 
> grDevices::dev.off()
null device 
          1 
> ###
> ### Local variables: ***
> ### mode: outline-minor ***
> ### outline-regexp: "\\(> \\)?### [*]+" ***
> ### End: ***
> quit('no')