1 files changed, 24 insertions, 0 deletions
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 ;
+  }
+}