add a SAL_RAND_REPEATABLE for repeatable random nums

merge the formula and comphelper ones together

Change-Id: I2e7e2cdb176afc6982e384fa1e007da5b914e6f0

1 files changed, 7 insertions, 0 deletions

diff --git a/comphelper/source/misc/random.cxx b/comphelper/source/misc/random.cxx
index 0c6e83edd20a..a70a73e3584b 100644
--- a/comphelper/source/misc/random.cxx
+++ b/comphelper/source/misc/random.cxx
@@ -39,6 +39,13 @@ struct RandomNumberGenerator
     STD_RNG_ALGO global_rng;
     RandomNumberGenerator()
     {
+        bool bRepeatable = (getenv("SAL_RAND_REPEATABLE") != 0);
+        if (bRepeatable)
+        {
+            global_rng.seed(42);
+            return;
+        }
+
         try
         {
             std::random_device rd;