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Added RandomGenerator:getState and RandomGenerator:setState (resolves issue #831.)

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getState returns an implementation-dependent string representing the current state of the RandomGenerator's PRNG. setState sets the PRNG's state to an implementation-dependent string.
This commit is contained in:
Alex Szpakowski
2014-02-08 20:28:41 -04:00
parent de1f105e40
commit d07e31370d
7 changed files with 201 additions and 135 deletions
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src/modules/math/wrap_RandomGenerator.cpp
+36 -31
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@@ -47,16 +47,8 @@ RandomGenerator::Seed luax_checkrandomseed(lua_State *L, int idx)
if (!lua_isnoneornil(L, idx + 1))
{
uint32 low = checkrandomseed_part<uint32>(L, idx);
uint32 high = checkrandomseed_part<uint32>(L, idx + 1);
#ifdef LOVE_BIG_ENDIAN
s.b32.a = high;
s.b32.b = low;
#else
s.b32.b = high;
s.b32.a = low;
#endif
s.b32.low = checkrandomseed_part<uint32>(L, idx);
s.b32.high = checkrandomseed_part<uint32>(L, idx + 1);
}
else
s.b64 = checkrandomseed_part<uint64>(L, idx);
@@ -95,25 +87,6 @@ RandomGenerator *luax_checkrandomgenerator(lua_State *L, int idx)
return luax_checktype<RandomGenerator>(L, idx, "RandomGenerator", MATH_RANDOM_GENERATOR_T);
}
int w_RandomGenerator_setSeed(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
EXCEPT_GUARD(rng->setSeed(luax_checkrandomseed(L, 2));)
return 0;
}
int w_RandomGenerator_getSeed(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
uint32 low = 0, high = 0;
rng->getSeed(low, high);
lua_pushnumber(L, (lua_Number) low);
lua_pushnumber(L, (lua_Number) high);
return 2;
}
int w_RandomGenerator_random(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
@@ -132,12 +105,44 @@ int w_RandomGenerator_randomNormal(lua_State *L)
return 1;
}
int w_RandomGenerator_setSeed(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
EXCEPT_GUARD(rng->setSeed(luax_checkrandomseed(L, 2));)
return 0;
}
int w_RandomGenerator_getSeed(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
RandomGenerator::Seed s = rng->getSeed();
lua_pushnumber(L, (lua_Number) s.b32.low);
lua_pushnumber(L, (lua_Number) s.b32.high);
return 2;
}
int w_RandomGenerator_setState(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
EXCEPT_GUARD(rng->setState(luax_checkstring(L, 2));)
return 0;
}
int w_RandomGenerator_getState(lua_State *L)
{
RandomGenerator *rng = luax_checkrandomgenerator(L, 1);
luax_pushstring(L, rng->getState());
return 1;
}
static const luaL_Reg functions[] =
{
{ "setSeed", w_RandomGenerator_setSeed },
{ "getSeed", w_RandomGenerator_getSeed },
{ "random", w_RandomGenerator_random },
{ "randomNormal", w_RandomGenerator_randomNormal },
{ "setSeed", w_RandomGenerator_setSeed },
{ "getSeed", w_RandomGenerator_getSeed },
{ "setState", w_RandomGenerator_setState },
{ "getState", w_RandomGenerator_getState },
{ 0, 0 }
};