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error conditions for Lua fixed point math

This commit is contained in:
Inuyasha 2016-04-18 14:50:15 -07:00
parent be7b866e4f
commit 18d5d64a4d
1 changed files with 9 additions and 2 deletions
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11
src/lua_mathlib.c
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@ -100,7 +100,11 @@ static int lib_fixedint(lua_State *L)
static int lib_fixeddiv(lua_State *L)
{
lua_pushfixed(L, FixedDiv(luaL_checkfixed(L, 1), luaL_checkfixed(L, 2)));
fixed_t i = luaL_checkfixed(L, 1);
fixed_t j = luaL_checkfixed(L, 2);
if (j == 0)
return luaL_error(L, "divide by zero");
lua_pushfixed(L, FixedDiv(i, j));
return 1;
}
@ -112,7 +116,10 @@ static int lib_fixedrem(lua_State *L)
static int lib_fixedsqrt(lua_State *L)
{
lua_pushfixed(L, FixedSqrt(luaL_checkfixed(L, 1)));
fixed_t i = luaL_checkfixed(L, 1);
if (i < 0)
return luaL_error(L, "can't take the square root of a negative number");
lua_pushfixed(L, FixedSqrt(i));
return 1;
}