From 4f670845ff9ab6c48bcb5f7bf4d4ef6dc3c3064b Mon Sep 17 00:00:00 2001
From: manuel <manuel@mausz.at>
Date: Tue, 27 Mar 2012 11:51:08 +0200
Subject: reorganize file structure to match the upstream requirements

---
 pintos-progos/lib/random.c | 83 ----------------------------------------------
 1 file changed, 83 deletions(-)
 delete mode 100644 pintos-progos/lib/random.c

(limited to 'pintos-progos/lib/random.c')

diff --git a/pintos-progos/lib/random.c b/pintos-progos/lib/random.c
deleted file mode 100644
index a4761b6..0000000
--- a/pintos-progos/lib/random.c
+++ /dev/null
@@ -1,83 +0,0 @@
-#include "random.h"
-#include <stdbool.h>
-#include <stdint.h>
-#include "debug.h"
-
-/* RC4-based pseudo-random number generator (PRNG).
-
-   RC4 is a stream cipher.  We're not using it here for its
-   cryptographic properties, but because it is easy to implement
-   and its output is plenty random for non-cryptographic
-   purposes.
-
-   See http://en.wikipedia.org/wiki/RC4_(cipher) for information
-   on RC4.*/
-
-/* RC4 state. */
-static uint8_t s[256];          /* S[]. */
-static uint8_t s_i, s_j;        /* i, j. */
-
-/* Already initialized? */
-static bool inited;     
-
-/* Swaps the bytes pointed to by A and B. */
-static inline void
-swap_byte (uint8_t *a, uint8_t *b) 
-{
-  uint8_t t = *a;
-  *a = *b;
-  *b = t;
-}
-
-/* Initializes or reinitializes the PRNG with the given SEED. */
-void
-random_init (unsigned seed)
-{
-  uint8_t *seedp = (uint8_t *) &seed;
-  int i;
-  uint8_t j;
-
-  for (i = 0; i < 256; i++) 
-    s[i] = i;
-  for (i = j = 0; i < 256; i++) 
-    {
-      j += s[i] + seedp[i % sizeof seed];
-      swap_byte (s + i, s + j);
-    }
-
-  s_i = s_j = 0;
-  inited = true;
-}
-
-/* Writes SIZE random bytes into BUF. */
-void
-random_bytes (void *buf_, size_t size) 
-{
-  uint8_t *buf;
-
-  if (!inited)
-    random_init (0);
-
-  for (buf = buf_; size-- > 0; buf++)
-    {
-      uint8_t s_k;
-      
-      s_i++;
-      s_j += s[s_i];
-      swap_byte (s + s_i, s + s_j);
-
-      s_k = s[s_i] + s[s_j];
-      *buf = s[s_k];
-    }
-}
-
-/* Returns a pseudo-random unsigned long.
-   Use random_ulong() % n to obtain a random number in the range
-   0...n (exclusive). */
-unsigned long
-random_ulong (void) 
-{
-  unsigned long ul;
-  random_bytes (&ul, sizeof ul);
-  return ul;
-}
-- 
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