RC4: Fix invalid read.

[paraslash.git] / para.h

diff --git a/para.h b/para.h
index c5e12fe6da3ef864bdc16bb0eaa178a8b5965cee..f095a6aa385d2f717048f1e25e15741a15632617 100644 (file)
--- a/para.h
+++ b/para.h
@@ -165,6 +165,16 @@ _static_inline_ long int para_random(unsigned max)
        return ((max + 0.0) * (random() / (RAND_MAX + 1.0)));
 }
 
+/** Round up x to next multiple of y. */
+#define ROUND_UP(x, y) ({ \
+       const typeof(y) _divisor = y; \
+       ((x) + _divisor - 1) / _divisor * _divisor; })
+
+/** Round down x to multiple of y. */
+#define ROUND_DOWN(x, y) ({ \
+       const typeof(y) _divisor = y; \
+       (x) / _divisor * _divisor; })
+
 /** Divide and round up to next integer. */
 #define DIV_ROUND_UP(x, y) ({ \
        typeof(y) _divisor = y; \