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, 34 insertions, 0 deletions

diff --git a/lib/util/randsysrandom.c b/lib/util/randsysrandom.c
new file mode 100644
index 00000000..97a1376e
--- /dev/null
+++ b/lib/util/randsysrandom.c
@@ -0,0 +1,34 @@
+#include "netpbm/rand.h"
+
+static void
+vinit(struct pm_randSt * const randStP) {
+
+    randStP->max    = RAND_MAX;
+    randStP->stateP = NULL;
+}
+
+
+
+static void
+vsrand(struct pm_randSt * const randStP,
+       unsigned int       const seed) {
+
+    srandom(seed);
+}
+
+
+
+static unsigned long int
+vrand(struct pm_randSt * const randStP) {
+
+    return random();
+}
+
+
+struct pm_rand_vtable const pm_randsysrandom_vtable = {
+    &vinit,
+    &vsrand,
+    &vrand
+};
+
+