* Remove support for map-based random number generation (which seems unused).

* Re-add in support for the old mersenne twister for those whose processors don't support SSE2.
* Toggling whether or not you are using SFMT is as easy as checking a CMake flag, USE_SFMT, which defaults to 0.

--HG--
branch : trunk

2 files changed, 35 insertions, 0 deletions

diff --git a/src/server/shared/CMakeLists.txt b/src/server/shared/CMakeLists.txt
index c2a35117686..d55108a23eb 100644
--- a/src/server/shared/CMakeLists.txt
+++ b/src/server/shared/CMakeLists.txt
@@ -53,6 +53,7 @@ set(shared_STAT_SRCS
 include_directories(
   ${CMAKE_BINARY_DIR}
   ${CMAKE_SOURCE_DIR}/dep/SFMT
+  ${CMAKE_SOURCE_DIR}/dep/mersennetwister
   ${CMAKE_SOURCE_DIR}/dep/sockets/include
   ${CMAKE_SOURCE_DIR}/dep/utf8cpp
   ${CMAKE_SOURCE_DIR}/src/server
diff --git a/src/server/shared/Utilities/Util.cpp b/src/server/shared/Utilities/Util.cpp
index ab59fdd6598..68f25138a6a 100644
--- a/src/server/shared/Utilities/Util.cpp
+++ b/src/server/shared/Utilities/Util.cpp
@@ -22,9 +22,14 @@
 
 #include "socket_include.h"
 #include "utf8.h"
+#ifdef USE_SFMT_FOR_RNG
 #include "SFMT.h"
+#else
+#include "MersenneTwister.h"
+#endif
 #include <ace/TSS_T.h>
 
+#ifdef USE_SFMT_FOR_RNG
 typedef ACE_TSS<SFMTRand> SFMTRandTSS;
 static SFMTRandTSS sfmtRand;
 
@@ -52,6 +57,35 @@ double rand_chance (void)
 {
     return sfmtRand->Random() * 100.0;
 }
+#else
+typedef ACE_TSS<MTRand> MTRandTSS;
+static MTRandTSS mtRand;
+
+int32 irand(int32 min, int32 max)
+{
+    return int32(mtRand->randInt (max - min)) + min;
+}
+
+uint32 urand(uint32 min, uint32 max)
+{
+    return mtRand->randInt (max - min) + min;
+}
+
+int32 rand32()
+{
+    return mtRand->randInt ();
+}
+
+double rand_norm(void)
+{
+    return mtRand->randExc();
+}
+
+double rand_chance(void)
+{
+    return mtRand->randExc(100.0);
+}
+#endif
 
 Tokens StrSplit(const std::string &src, const std::string &sep)
 {