From 3534b428629be185e096be99e3bd5fdfe32d5544 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 18 Sep 2014 18:55:44 +0000
Subject: initial commit with rc for skalibs-2.0.0.0

---
 src/librandom/rrandom_readint.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/librandom/rrandom_readint.c

(limited to 'src/librandom/rrandom_readint.c')

diff --git a/src/librandom/rrandom_readint.c b/src/librandom/rrandom_readint.c
new file mode 100644
index 0000000..e4f677c
--- /dev/null
+++ b/src/librandom/rrandom_readint.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <skalibs/uint.h>
+#include <skalibs/unirandom.h>
+#include "random-internal.h"
+#include <skalibs/rrandom.h>
+
+unsigned int rrandom_readint (rrandom_ref z, unsigned int n, unsigned int (*f) (unirandom_ref, char *, unsigned int))
+{
+  if (!n) return 0 ;
+  else
+  {
+    unsigned int i = n, nchars = random_nchars(n), m = random_mask2(n-1) ;
+    char tmp[UINT_PACK] ;
+    while (i >= n)
+    {
+      if (rrandom_read(z, tmp, nchars, f) < nchars) return 0 ;
+      byte_zero(tmp + nchars, UINT_PACK - nchars) ;
+      uint_unpack(tmp, &i) ;
+      i &= m ;
+    }
+    return i ;
+  }
+}
-- 
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