mirror of
https://github.com/ccxvii/mujs.git
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101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
#include "jsi.h"
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#include "jsvalue.h"
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#include "jsbuiltin.h"
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static void jsB_new_Number(js_State *J)
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{
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js_newnumber(J, js_gettop(J) > 1 ? js_tonumber(J, 1) : 0);
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}
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static void jsB_Number(js_State *J)
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{
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js_pushnumber(J, js_gettop(J) > 1 ? js_tonumber(J, 1) : 0);
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}
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static void Np_valueOf(js_State *J)
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{
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js_Object *self = js_toobject(J, 0);
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if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
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js_pushnumber(J, self->u.number);
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}
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static void Np_toString(js_State *J)
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{
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js_Object *self = js_toobject(J, 0);
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int radix = js_isundefined(J, 1) ? 10 : js_tointeger(J, 1);
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if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
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if (radix < 2 || radix > 36)
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js_rangeerror(J, "invalid radix");
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if (radix != 10)
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js_rangeerror(J, "invalid radix");
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js_pushliteral(J, jsV_numbertostring(J, self->u.number));
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}
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/* Customized ToString() on a number */
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void numtostr(js_State *J, const char *fmt, int w, double n)
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{
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char buf[32], *e;
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if (isnan(n)) js_pushliteral(J, "NaN");
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else if (isinf(n)) js_pushliteral(J, n < 0 ? "-Infinity" : "Infinity");
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else if (n == 0) js_pushliteral(J, "0");
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else {
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if (w < 1) w = 1;
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if (w > 17) w = 17;
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sprintf(buf, fmt, w, n);
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e = strchr(buf, 'e');
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if (e) {
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int exp = atoi(e+1);
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sprintf(e, "e%+d", exp);
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}
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js_pushstring(J, buf);
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}
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}
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static void Np_toFixed(js_State *J)
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{
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js_Object *self = js_toobject(J, 0);
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int width = js_tointeger(J, 1);
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if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
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numtostr(J, "%.*f", width, self->u.number);
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}
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static void Np_toExponential(js_State *J)
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{
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js_Object *self = js_toobject(J, 0);
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int width = js_tointeger(J, 1);
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if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
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numtostr(J, "%.*e", width, self->u.number);
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}
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static void Np_toPrecision(js_State *J)
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{
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js_Object *self = js_toobject(J, 0);
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int width = js_tointeger(J, 1);
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if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
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numtostr(J, "%.*g", width, self->u.number);
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}
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void jsB_initnumber(js_State *J)
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{
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J->Number_prototype->u.number = 0;
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js_pushobject(J, J->Number_prototype);
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{
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jsB_propf(J, "valueOf", Np_valueOf, 0);
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jsB_propf(J, "toString", Np_toString, 1);
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jsB_propf(J, "toLocaleString", Np_toString, 0);
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jsB_propf(J, "toFixed", Np_toFixed, 1);
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jsB_propf(J, "toExponential", Np_toExponential, 1);
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jsB_propf(J, "toPrecision", Np_toPrecision, 1);
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}
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js_newcconstructor(J, jsB_Number, jsB_new_Number, 1);
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{
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jsB_propn(J, "MAX_VALUE", 1.7976931348623157e+308);
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jsB_propn(J, "MIN_VALUE", 5e-324);
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jsB_propn(J, "NaN", NAN);
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jsB_propn(J, "NEGATIVE_INFINITY", -INFINITY);
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jsB_propn(J, "POSITIVE_INFINITY", INFINITY);
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}
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js_defglobal(J, "Number", JS_DONTENUM);
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}
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