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-rw-r--r--src/lib/lmathlib.c193
1 files changed, 114 insertions, 79 deletions
diff --git a/src/lib/lmathlib.c b/src/lib/lmathlib.c
index 19cb11c2..c062cf49 100644
--- a/src/lib/lmathlib.c
+++ b/src/lib/lmathlib.c
@@ -1,6 +1,6 @@
/*
-** $Id: lmathlib.c,v 1.17 1999/07/07 17:54:08 roberto Exp $
-** Lua standard mathematical library
+** $Id: lmathlib.c,v 1.32 2000/10/31 13:10:24 roberto Exp $
+** Standard mathematical library
** See Copyright Notice in lua.h
*/
@@ -8,14 +8,15 @@
#include <stdlib.h>
#include <math.h>
-#include "lauxlib.h"
#include "lua.h"
+
+#include "lauxlib.h"
#include "lualib.h"
#undef PI
-#define PI (3.14159265358979323846)
-#define RADIANS_PER_DEGREE (PI/180.0)
+#define PI (3.14159265358979323846)
+#define RADIANS_PER_DEGREE (PI/180.0)
@@ -32,139 +33,173 @@
#endif
-static void math_abs (void) {
- lua_pushnumber(fabs(luaL_check_number(1)));
+static int math_abs (lua_State *L) {
+ lua_pushnumber(L, fabs(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_sin (void) {
- lua_pushnumber(sin(TORAD(luaL_check_number(1))));
+static int math_sin (lua_State *L) {
+ lua_pushnumber(L, sin(TORAD(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_cos (void) {
- lua_pushnumber(cos(TORAD(luaL_check_number(1))));
+static int math_cos (lua_State *L) {
+ lua_pushnumber(L, cos(TORAD(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_tan (void) {
- lua_pushnumber(tan(TORAD(luaL_check_number(1))));
+static int math_tan (lua_State *L) {
+ lua_pushnumber(L, tan(TORAD(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_asin (void) {
- lua_pushnumber(FROMRAD(asin(luaL_check_number(1))));
+static int math_asin (lua_State *L) {
+ lua_pushnumber(L, FROMRAD(asin(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_acos (void) {
- lua_pushnumber(FROMRAD(acos(luaL_check_number(1))));
+static int math_acos (lua_State *L) {
+ lua_pushnumber(L, FROMRAD(acos(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_atan (void) {
- lua_pushnumber(FROMRAD(atan(luaL_check_number(1))));
+static int math_atan (lua_State *L) {
+ lua_pushnumber(L, FROMRAD(atan(luaL_check_number(L, 1))));
+ return 1;
}
-static void math_atan2 (void) {
- lua_pushnumber(FROMRAD(atan2(luaL_check_number(1), luaL_check_number(2))));
+static int math_atan2 (lua_State *L) {
+ lua_pushnumber(L, FROMRAD(atan2(luaL_check_number(L, 1), luaL_check_number(L, 2))));
+ return 1;
}
-static void math_ceil (void) {
- lua_pushnumber(ceil(luaL_check_number(1)));
+static int math_ceil (lua_State *L) {
+ lua_pushnumber(L, ceil(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_floor (void) {
- lua_pushnumber(floor(luaL_check_number(1)));
+static int math_floor (lua_State *L) {
+ lua_pushnumber(L, floor(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_mod (void) {
- lua_pushnumber(fmod(luaL_check_number(1), luaL_check_number(2)));
+static int math_mod (lua_State *L) {
+ lua_pushnumber(L, fmod(luaL_check_number(L, 1), luaL_check_number(L, 2)));
+ return 1;
}
-static void math_sqrt (void) {
- lua_pushnumber(sqrt(luaL_check_number(1)));
+static int math_sqrt (lua_State *L) {
+ lua_pushnumber(L, sqrt(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_pow (void) {
- lua_pushnumber(pow(luaL_check_number(1), luaL_check_number(2)));
+static int math_pow (lua_State *L) {
+ lua_pushnumber(L, pow(luaL_check_number(L, 1), luaL_check_number(L, 2)));
+ return 1;
}
-static void math_log (void) {
- lua_pushnumber(log(luaL_check_number(1)));
+static int math_log (lua_State *L) {
+ lua_pushnumber(L, log(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_log10 (void) {
- lua_pushnumber(log10(luaL_check_number(1)));
+static int math_log10 (lua_State *L) {
+ lua_pushnumber(L, log10(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_exp (void) {
- lua_pushnumber(exp(luaL_check_number(1)));
+static int math_exp (lua_State *L) {
+ lua_pushnumber(L, exp(luaL_check_number(L, 1)));
+ return 1;
}
-static void math_deg (void) {
- lua_pushnumber(luaL_check_number(1)/RADIANS_PER_DEGREE);
+static int math_deg (lua_State *L) {
+ lua_pushnumber(L, luaL_check_number(L, 1)/RADIANS_PER_DEGREE);
+ return 1;
}
-static void math_rad (void) {
- lua_pushnumber(luaL_check_number(1)*RADIANS_PER_DEGREE);
+static int math_rad (lua_State *L) {
+ lua_pushnumber(L, luaL_check_number(L, 1)*RADIANS_PER_DEGREE);
+ return 1;
}
-static void math_frexp (void) {
+static int math_frexp (lua_State *L) {
int e;
- lua_pushnumber(frexp(luaL_check_number(1), &e));
- lua_pushnumber(e);
+ lua_pushnumber(L, frexp(luaL_check_number(L, 1), &e));
+ lua_pushnumber(L, e);
+ return 2;
}
-static void math_ldexp (void) {
- lua_pushnumber(ldexp(luaL_check_number(1), luaL_check_int(2)));
+static int math_ldexp (lua_State *L) {
+ lua_pushnumber(L, ldexp(luaL_check_number(L, 1), luaL_check_int(L, 2)));
+ return 1;
}
-static void math_min (void) {
- int i = 1;
- double dmin = luaL_check_number(i);
- while (lua_getparam(++i) != LUA_NOOBJECT) {
- double d = luaL_check_number(i);
+static int math_min (lua_State *L) {
+ int n = lua_gettop(L); /* number of arguments */
+ double dmin = luaL_check_number(L, 1);
+ int i;
+ for (i=2; i<=n; i++) {
+ double d = luaL_check_number(L, i);
if (d < dmin)
dmin = d;
}
- lua_pushnumber(dmin);
+ lua_pushnumber(L, dmin);
+ return 1;
}
-static void math_max (void) {
- int i = 1;
- double dmax = luaL_check_number(i);
- while (lua_getparam(++i) != LUA_NOOBJECT) {
- double d = luaL_check_number(i);
+static int math_max (lua_State *L) {
+ int n = lua_gettop(L); /* number of arguments */
+ double dmax = luaL_check_number(L, 1);
+ int i;
+ for (i=2; i<=n; i++) {
+ double d = luaL_check_number(L, i);
if (d > dmax)
dmax = d;
}
- lua_pushnumber(dmax);
+ lua_pushnumber(L, dmax);
+ return 1;
}
-static void math_random (void) {
+static int math_random (lua_State *L) {
/* the '%' avoids the (rare) case of r==1, and is needed also because on
- some systems (SunOS!) "rand()" may return a value bigger than RAND_MAX */
+ some systems (SunOS!) "rand()" may return a value larger than RAND_MAX */
double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
- int l = luaL_opt_int(1, 0);
- if (l == 0)
- lua_pushnumber(r);
- else {
- int u = luaL_opt_int(2, 0);
- if (u == 0) {
- u = l;
- l = 1;
+ switch (lua_gettop(L)) { /* check number of arguments */
+ case 0: { /* no arguments */
+ lua_pushnumber(L, r); /* Number between 0 and 1 */
+ break;
+ }
+ case 1: { /* only upper limit */
+ int u = luaL_check_int(L, 1);
+ luaL_arg_check(L, 1<=u, 1, "interval is empty");
+ lua_pushnumber(L, (int)(r*u)+1); /* integer between 1 and `u' */
+ break;
+ }
+ case 2: { /* lower and upper limits */
+ int l = luaL_check_int(L, 1);
+ int u = luaL_check_int(L, 2);
+ luaL_arg_check(L, l<=u, 2, "interval is empty");
+ lua_pushnumber(L, (int)(r*(u-l+1))+l); /* integer between `l' and `u' */
+ break;
}
- luaL_arg_check(l<=u, 1, "interval is empty");
- lua_pushnumber((int)(r*(u-l+1))+l);
+ default: lua_error(L, "wrong number of arguments");
}
+ return 1;
}
-static void math_randomseed (void) {
- srand(luaL_check_int(1));
+static int math_randomseed (lua_State *L) {
+ srand(luaL_check_int(L, 1));
+ return 0;
}
-static struct luaL_reg mathlib[] = {
+static const struct luaL_reg mathlib[] = {
{"abs", math_abs},
{"sin", math_sin},
{"cos", math_cos},
@@ -193,11 +228,11 @@ static struct luaL_reg mathlib[] = {
/*
** Open math library
*/
-void lua_mathlibopen (void) {
- luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
- lua_pushcfunction(math_pow);
- lua_pushnumber(0); /* to get its tag */
- lua_settagmethod(lua_tag(lua_pop()), "pow");
- lua_pushnumber(PI); lua_setglobal("PI");
+LUALIB_API void lua_mathlibopen (lua_State *L) {
+ luaL_openl(L, mathlib);
+ lua_pushcfunction(L, math_pow);
+ lua_settagmethod(L, LUA_TNUMBER, "pow");
+ lua_pushnumber(L, PI);
+ lua_setglobal(L, "PI");
}
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