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Handle max<min in LuaPseudoRandom::l_next()

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This commit is contained in:
Perttu Ahola 2012-07-27 19:03:15 +03:00
parent 3e754382af
commit e64feefc61
1 changed files with 4 additions and 0 deletions
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4
src/scriptapi.cpp
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@ -3928,6 +3928,10 @@ private:
min = luaL_checkinteger(L, 2); min = luaL_checkinteger(L, 2);
if(!lua_isnil(L, 3)) if(!lua_isnil(L, 3))
max = luaL_checkinteger(L, 3); max = luaL_checkinteger(L, 3);
if(max < min){
errorstream<<"PseudoRandom.next(): max="<<max<<" min="<<min<<std::endl;
throw LuaError(L, "PseudoRandom.next(): max < min");
}
if(max - min != 32767 && max - min > 32767/5) if(max - min != 32767 && max - min > 32767/5)
throw LuaError(L, "PseudoRandom.next() max-min is not 32767 and is > 32768/5. This is disallowed due to the bad random distribution the implementation would otherwise make."); throw LuaError(L, "PseudoRandom.next() max-min is not 32767 and is > 32768/5. This is disallowed due to the bad random distribution the implementation would otherwise make.");
PseudoRandom &pseudo = o->m_pseudo; PseudoRandom &pseudo = o->m_pseudo;