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Handle NaN and Infinity in Number.toFixed and friends.

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Tor Andersson
2014-03-06 21:40:37 +01:00
parent 69cb649c2b
commit b24fe47378
1 changed files with 24 additions and 12 deletions
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36
jsnumber.c
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@@ -22,38 +22,50 @@ static void Np_valueOf(js_State *J, unsigned int argc)
static void Np_toString(js_State *J, unsigned int argc)
{
js_Object *self = js_toobject(J, 0);
int radix = js_isundefined(J, 1) ? 10 : js_tointeger(J, 1);
if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
if (radix < 2 || radix > 36)
js_rangeerror(J, "invalid radix");
if (radix != 10)
js_rangeerror(J, "invalid radix");
js_pushliteral(J, jsV_numbertostring(J, self->u.number));
}
/* Customized ToString() on a number */
void numtostr(js_State *J, const char *fmt, int w, double n)
{
char buf[40];
if (isnan(n)) js_pushliteral(J, "NaN");
else if (isinf(n)) js_pushliteral(J, n < 0 ? "-Infinity" : "Infinity");
else if (n == 0) js_pushliteral(J, "0");
else {
sprintf(buf, fmt, w, n);
js_pushstring(J, buf);
}
}
static void Np_toFixed(js_State *J, unsigned int argc)
{
char buf[40];
js_Object *self = js_toobject(J, 0);
int width = js_tonumber(J, 1);
int width = js_tointeger(J, 1);
if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
sprintf(buf, "%.*f", width, self->u.number);
js_pushstring(J, buf);
numtostr(J, "%.*f", width, self->u.number);
}
static void Np_toExponential(js_State *J, unsigned int argc)
{
char buf[40];
js_Object *self = js_toobject(J, 0);
int width = js_tonumber(J, 1);
int width = js_tointeger(J, 1);
if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
sprintf(buf, "%.*e", width, self->u.number);
js_pushstring(J, buf);
numtostr(J, "%.*e", width, self->u.number);
}
static void Np_toPrecision(js_State *J, unsigned int argc)
{
char buf[40];
js_Object *self = js_toobject(J, 0);
int width = js_tonumber(J, 1);
int width = js_tointeger(J, 1);
if (self->type != JS_CNUMBER) js_typeerror(J, "not a number");
sprintf(buf, "%.*g", width, self->u.number);
js_pushstring(J, buf);
numtostr(J, "%.*g", width, self->u.number);
}
void jsB_initnumber(js_State *J)