Use Mersenee Twister instead of libc rand for random numbers

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4033 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 7 insertions, 5 deletions

diff --git a/editor/pnmremap.c b/editor/pnmremap.c
index 0c0096ba..e5b59d04 100644
--- a/editor/pnmremap.c
+++ b/editor/pnmremap.c
@@ -28,6 +28,7 @@
 #include "pm_c_util.h"
 #include "mallocvar.h"
 #include "nstring.h"
+#include "rand.h"
 #include "shhopt.h"
 #include "pam.h"
 #include "ppm.h"
@@ -399,20 +400,21 @@ randomizeError(long **       const err,
    Set a random error in the range [-1 .. 1] (normalized via FS_SCALE)
    in the error array err[][].
 -----------------------------------------------------------------------------*/
-    unsigned int const seed = (random.init == RANDOM_WITHSEED) ?
-        random.seed : pm_randseed();
-
     unsigned int col;
+    struct pm_randSt randSt;
 
     assert(random.init != RANDOM_NONE);
 
-    srand(seed);
+    pm_randinit(&randSt);
+    pm_srand2(&randSt, random.init == RANDOM_WITHSEED, random.seed);
 
     for (col = 0; col < width; ++col) {
         unsigned int plane;
         for (plane = 0; plane < depth; ++plane)
-            err[plane][col] = rand() % (FS_SCALE * 2) - FS_SCALE;
+            err[plane][col] = pm_rand(&randSt) % (FS_SCALE * 2) - FS_SCALE;
     }
+
+    pm_randterm(&randSt);
 }