From fa7ef572c782c9394f60202d950d3380dfdce5c3 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Thu, 29 Apr 2004 18:10:22 +0000
Subject: Implemented text and clipping primitives in the frontend, and added
 two new simple games `fifteen' and `sixteen'.

[originally from svn r4173]
---
 misc.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 misc.c

(limited to 'misc.c')

diff --git a/misc.c b/misc.c
new file mode 100644
index 0000000..58c4fb7
--- /dev/null
+++ b/misc.c
@@ -0,0 +1,25 @@
+/*
+ * misc.c: Miscellaneous helpful functions.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+
+#include "puzzles.h"
+
+int rand_upto(int limit)
+{
+    unsigned long divisor = RAND_MAX / (unsigned)limit;
+    unsigned long max = divisor * (unsigned)limit;
+    unsigned long n;
+
+    assert(limit > 0);
+
+    do {
+        n = rand();
+    } while (n >= max);
+
+    n /= divisor;
+
+    return (int)n;
+}
-- 
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