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new function 'math.isfloat'

This commit is contained in:
Roberto Ierusalimschy 2013-05-02 14:31:54 -03:00
parent 6347004be9
commit 29fe3abda2
1 changed files with 8 additions and 1 deletions
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9
lmathlib.c
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@ -1,5 +1,5 @@
/* /*
** $Id: lmathlib.c,v 1.82 2013/01/29 16:00:40 roberto Exp roberto $ ** $Id: lmathlib.c,v 1.83 2013/03/07 18:21:32 roberto Exp roberto $
** Standard mathematical library ** Standard mathematical library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -230,6 +230,12 @@ static int math_randomseed (lua_State *L) {
} }
static int math_isfloat (lua_State *L) {
luaL_checkany(L, 1);
lua_pushboolean(L, (lua_type(L, 1) == LUA_TNUMBER && !lua_isinteger(L, 1)));
return 1;
}
static const luaL_Reg mathlib[] = { static const luaL_Reg mathlib[] = {
{"abs", math_abs}, {"abs", math_abs},
{"acos", math_acos}, {"acos", math_acos},
@ -244,6 +250,7 @@ static const luaL_Reg mathlib[] = {
{"floor", math_floor}, {"floor", math_floor},
{"fmod", math_fmod}, {"fmod", math_fmod},
{"frexp", math_frexp}, {"frexp", math_frexp},
{"isfloat", math_isfloat},
{"ldexp", math_ldexp}, {"ldexp", math_ldexp},
#if defined(LUA_COMPAT_LOG10) #if defined(LUA_COMPAT_LOG10)
{"log10", math_log10}, {"log10", math_log10},