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new macro 'l_tvar' to easy the use of mathlib with other floating 

types (float and long double)
This commit is contained in:
Roberto Ierusalimschy 2010-11-11 13:39:12 -02:00
parent 23b9ceb0a4
commit 1a46a713d2
1 changed files with 39 additions and 28 deletions
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67
lmathlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lmathlib.c,v 1.75 2010/07/02 11:38:13 roberto Exp roberto $
** $Id: lmathlib.c,v 1.76 2010/10/25 20:31:11 roberto Exp roberto $
** Standard mathematical library
** See Copyright Notice in lua.h
*/
@ -22,92 +22,102 @@
#define RADIANS_PER_DEGREE (PI/180.0)
/* macro 'l_tvar' allows the addition of an 'l' or 'f' to all
math operations */
#if !defined(l_l_tvar)
#define l_tvar(x) (x)
#endif
static int math_abs (lua_State *L) {
lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(fabs)(luaL_checknumber(L, 1)));
return 1;
}
static int math_sin (lua_State *L) {
lua_pushnumber(L, sin(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(sin)(luaL_checknumber(L, 1)));
return 1;
}
static int math_sinh (lua_State *L) {
lua_pushnumber(L, sinh(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(sinh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_cos (lua_State *L) {
lua_pushnumber(L, cos(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(cos)(luaL_checknumber(L, 1)));
return 1;
}
static int math_cosh (lua_State *L) {
lua_pushnumber(L, cosh(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(cosh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tan (lua_State *L) {
lua_pushnumber(L, tan(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(tan)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tanh (lua_State *L) {
lua_pushnumber(L, tanh(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(tanh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_asin (lua_State *L) {
lua_pushnumber(L, asin(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(asin)(luaL_checknumber(L, 1)));
return 1;
}
static int math_acos (lua_State *L) {
lua_pushnumber(L, acos(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(acos)(luaL_checknumber(L, 1)));
return 1;
}
static int math_atan (lua_State *L) {
lua_pushnumber(L, atan(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(atan)(luaL_checknumber(L, 1)));
return 1;
}
static int math_atan2 (lua_State *L) {
lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
lua_pushnumber(L, l_tvar(atan2)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
}
static int math_ceil (lua_State *L) {
lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(ceil)(luaL_checknumber(L, 1)));
return 1;
}
static int math_floor (lua_State *L) {
lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(floor)(luaL_checknumber(L, 1)));
return 1;
}
static int math_fmod (lua_State *L) {
lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
lua_pushnumber(L, l_tvar(fmod)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
}
static int math_modf (lua_State *L) {
double ip;
double fp = modf(luaL_checknumber(L, 1), &ip);
lua_Number ip;
lua_Number fp = l_tvar(modf)(luaL_checknumber(L, 1), &ip);
lua_pushnumber(L, ip);
lua_pushnumber(L, fp);
return 2;
}
static int math_sqrt (lua_State *L) {
lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(sqrt)(luaL_checknumber(L, 1)));
return 1;
}
static int math_pow (lua_State *L) {
lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
lua_pushnumber(L, l_tvar(pow)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
}
@ -115,11 +125,11 @@ static int math_log (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
lua_Number res;
if (lua_isnoneornil(L, 2))
res = log(x);
res = l_tvar(log)(x);
else {
lua_Number base = luaL_checknumber(L, 2);
if (base == 10.0) res = log10(x);
else res = log(x)/log(base);
if (base == 10.0) res = l_tvar(log10)(x);
else res = l_tvar(log)(x)/l_tvar(log)(base);
}
lua_pushnumber(L, res);
return 1;
@ -130,12 +140,12 @@ static int math_log10 (lua_State *L) {
luaL_error(L, "function " LUA_QL("log10")
" is deprecated; use log(x, 10) instead");
#endif
lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(log10)(luaL_checknumber(L, 1)));
return 1;
}
static int math_exp (lua_State *L) {
lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
lua_pushnumber(L, l_tvar(exp)(luaL_checknumber(L, 1)));
return 1;
}
@ -151,13 +161,14 @@ static int math_rad (lua_State *L) {
static int math_frexp (lua_State *L) {
int e;
lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
lua_pushnumber(L, l_tvar(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e);
return 2;
}
static int math_ldexp (lua_State *L) {
lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
lua_pushnumber(L, l_tvar(ldexp)(luaL_checknumber(L, 1),
luaL_checkint(L, 2)));
return 1;
}
@ -203,14 +214,14 @@ static int math_random (lua_State *L) {
case 1: { /* only upper limit */
lua_Number u = luaL_checknumber(L, 1);
luaL_argcheck(L, 1.0 <= u, 1, "interval is empty");
lua_pushnumber(L, floor(r*u) + 1.0); /* int between 1 and `u' */
lua_pushnumber(L, l_tvar(floor)(r*u) + 1.0); /* int in [1, u] */
break;
}
case 2: { /* lower and upper limits */
lua_Number l = luaL_checknumber(L, 1);
lua_Number u = luaL_checknumber(L, 2);
luaL_argcheck(L, l <= u, 2, "interval is empty");
lua_pushnumber(L, floor(r*(u-l+1)) + l); /* int between `l' and `u' */
lua_pushnumber(L, l_tvar(floor)(r*(u-l+1)) + l); /* int in [l, u] */
break;
}
default: return luaL_error(L, "wrong number of arguments");