math package floating point exceptions
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- Subject: math package floating point exceptions
- From: James Walker <jamesw@...>
- Date: 2008年3月28日 16:57:35 -0700
When Lua is used on Windows, floating point exceptions can crash the
host application. I suggest adding some error checks, something like this:
static int math_asin (lua_State *L) {
lua_Number arg = luaL_checknumber(L, 1);
if (fabs(arg) > 1.0)
return luaL_error( L, "Illegal argument %f to math.asin", arg );
lua_pushnumber(L, asin(arg));
return 1;
}
Similar checks could also be added to acos, sqrt, pow, log, log10.
(I just joined the list, but first I searched the archive, and could not
find anything about this.)
--
James W. Walker, Innoventive Software LLC
<http://www.frameforge3d.com/>