From f1f4cabd8e8602355630b2b4b5715fc137b4dc71 Mon Sep 17 00:00:00 2001
From: Emil Velikov <emil.l.velikov@gmail.com>
Date: Sun, 22 Mar 2015 21:38:08 +0000
Subject: tests/random: extract test out of xf86drmRandom.c

With follow up commits we can clear it up and wire to
make check

v2:
 - Use xf86drmRandom.h for common struct.(Jan)
 - Add test to .gitignore.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>
---
 xf86drmRandom.c | 78 +++------------------------------------------------------
 1 file changed, 4 insertions(+), 74 deletions(-)

(limited to 'xf86drmRandom.c')

diff --git a/xf86drmRandom.c b/xf86drmRandom.c
index 94922ad7..b3a4be94 100644
--- a/xf86drmRandom.c
+++ b/xf86drmRandom.c
@@ -74,45 +74,17 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#define RANDOM_MAIN 0
-
-#if !RANDOM_MAIN
-# include "xf86drm.h"
-#endif
+#include "xf86drm.h"
+#include "xf86drmRandom.h"
 
 #define RANDOM_MAGIC 0xfeedbeef
 #define RANDOM_DEBUG 0
 
-#if RANDOM_MAIN
-#define RANDOM_ALLOC malloc
-#define RANDOM_FREE  free
-#else
-#define RANDOM_ALLOC drmMalloc
-#define RANDOM_FREE  drmFree
-#endif
-
-typedef struct RandomState {
-    unsigned long magic;
-    unsigned long a;
-    unsigned long m;
-    unsigned long q;		/* m div a */
-    unsigned long r;		/* m mod a */
-    unsigned long check;
-    unsigned long seed;
-} RandomState;
-
-#if RANDOM_MAIN
-extern void          *drmRandomCreate(unsigned long seed);
-extern int           drmRandomDestroy(void *state);
-extern unsigned long drmRandom(void *state);
-extern double        drmRandomDouble(void *state);
-#endif
-
 void *drmRandomCreate(unsigned long seed)
 {
     RandomState  *state;
 
-    state           = RANDOM_ALLOC(sizeof(*state));
+    state           = drmMalloc(sizeof(*state));
     if (!state) return NULL;
     state->magic    = RANDOM_MAGIC;
 #if 0
@@ -140,7 +112,7 @@ void *drmRandomCreate(unsigned long seed)
 
 int drmRandomDestroy(void *state)
 {
-    RANDOM_FREE(state);
+    drmFree(state);
     return 0;
 }
 
@@ -164,45 +136,3 @@ double drmRandomDouble(void *state)
     
     return (double)drmRandom(state)/(double)s->m;
 }
-
-#if RANDOM_MAIN
-static void check_period(unsigned long seed)
-{
-    unsigned long count = 0;
-    unsigned long initial;
-    void          *state;
-    
-    state = drmRandomCreate(seed);
-    initial = drmRandom(state);
-    ++count;
-    while (initial != drmRandom(state)) {
-	if (!++count) break;
-    }
-    printf("With seed of %10lu, period = %10lu (0x%08lx)\n",
-	   seed, count, count);
-    drmRandomDestroy(state);
-}
-
-int main(void)
-{
-    RandomState   *state;
-    int           i;
-    unsigned long rand;
-
-    state = drmRandomCreate(1);
-    for (i = 0; i < 10000; i++) {
-	rand = drmRandom(state);
-    }
-    printf("After 10000 iterations: %lu (%lu expected): %s\n",
-	   rand, state->check,
-	   rand - state->check ? "*INCORRECT*" : "CORRECT");
-    drmRandomDestroy(state);
-
-    printf("Checking periods...\n");
-    check_period(1);
-    check_period(2);
-    check_period(31415926);
-    
-    return 0;
-}
-#endif
-- 
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