>From 7fcfbf715644d2268236b8a19d1f2f83c952d72b Mon Sep 17 00:00:00 2001
From: Pauli Nieminen <suok...@gmail.com>
Date: Mon, 20 Jul 2009 16:25:59 +0300
Subject: [PATCH 07/15] libdrm: Fix random number generator to use unsigned seed.
This fixes wanring about unsigned/signed comparision.
Also make it easier to compile test program using -D switch.
---
libdrm/xf86drmRandom.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/libdrm/xf86drmRandom.c b/libdrm/xf86drmRandom.c
index ecab9e2..f488630 100644
--- a/libdrm/xf86drmRandom.c
+++ b/libdrm/xf86drmRandom.c
@@ -74,7 +74,9 @@
#include <stdio.h>
#include <stdlib.h>
+#ifndef RANDOM_MAIN
#define RANDOM_MAIN 0
+#endif
#if !RANDOM_MAIN
# include "xf86drm.h"
@@ -98,7 +100,7 @@ typedef struct RandomState {
unsigned long q; /* m div a */
unsigned long r; /* m mod a */
unsigned long check;
- long seed;
+ unsigned long seed;
} RandomState;
#if RANDOM_MAIN
@@ -153,7 +155,7 @@ unsigned long drmRandom(void *state)
hi = s->seed / s->q;
lo = s->seed % s->q;
s->seed = s->a * lo - s->r * hi;
- if (s->seed <= 0) s->seed += s->m;
+ if (s->seed > s->m) s->seed += s->m;
return s->seed;
}
--
1.6.3.3
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