Clean up and modernize librandom.

 Correct random number generation has historically been
suprisingly painful to achieve. There was no standard,
every system behaved in a subtly different way, and there
were a few userland initiatives to get decent randomness,
all incompatible of course.
 The situation is a bit better now, we're heading towards
some standardization. The arc4random() series of functions
is a good API, and available on a lot of systems -
unfortunately not Linux, but on Linux the new getrandom()
makes using /dev/random obsolete.

 So I removed the old crap in librandom, dropped EGD support,
dropped dynamic backend selection, made a single API series
(random_* instead of goodrandom_* and badrandom_*), added
an arc4random backend and a getrandom backend, and defaulted
to /dev/urandom backed up by SURF in the worst case. This
should be much smaller and logical. However, it's a major
API break, so the skarnet.org stack will be changed to
adapt.

1 files changed, 0 insertions, 35 deletions

diff --git a/src/librandom/random_mask2.c b/src/librandom/random_mask2.c
deleted file mode 100644
index ab8c8e7..0000000
--- a/src/librandom/random_mask2.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/* ISC license. */
-
-#include <skalibs/sysdeps.h>
-#include "random-internal.h"
-
-unsigned int random_mask2 (register unsigned int n)
-{
-  for (;;)
-  {
-    register unsigned int m = n | (n >> 1) ;
-    if (m == n) return n ;
-    n = m ;
-  }
-}
-
-unsigned int random_nchars (register unsigned int n)
-{
-  return n <= 0xff ? 1 :
-#if SKALIBS_SIZEOFUINT == 2
-  2
-#else
-         n <= 0xffff ? 2 :
-         n <= 0xffffffUL ? 3 :
-# if SKALIBS_SIZEOFUINT == 4
-  4
-# else
-         n <= 0xffffffffUL ? 4 :
-         n <= 0xffffffffffULL ? 5 :
-         n <= 0xffffffffffffULL ? 6 :
-         n <= 0xffffffffffffffULL ? 7 :
-  8
-# endif
-#endif
- ;
-}