DUK_LOCAL double duk__atan2_fixed(double x, double y) {
#if defined(DUK_USE_ATAN2_WORKAROUNDS)
/* Specific fixes to common atan2() implementation issues:
* - test-bug-mingw-math-issues.js
*/
if (DUK_ISINF(x) && DUK_ISINF(y)) {
if (DUK_SIGNBIT(x)) {
if (DUK_SIGNBIT(y)) {
return -2.356194490192345;
} else {
return -0.7853981633974483;
}
} else {
if (DUK_SIGNBIT(y)) {
return 2.356194490192345;
} else {
return 0.7853981633974483;
}
}
}
#else
/* Some ISO C assumptions. */
DUK_ASSERT(DUK_ATAN2(DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY) == 0.7853981633974483);
DUK_ASSERT(DUK_ATAN2(-DUK_DOUBLE_INFINITY, DUK_DOUBLE_INFINITY) == -0.7853981633974483);
DUK_ASSERT(DUK_ATAN2(DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY) == 2.356194490192345);
DUK_ASSERT(DUK_ATAN2(-DUK_DOUBLE_INFINITY, -DUK_DOUBLE_INFINITY) == -2.356194490192345);
#endif
return DUK_ATAN2(x, y);
}
/* Push 'this' binding, check that it is a Date object; then push the
* internal time value. At the end, stack is: [ ... this timeval ].
* Returns the time value. Local time adjustment is done if requested.
*/
static double push_this_and_get_timeval_tzoffset(duk_context *ctx, int flags, int *out_tzoffset) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h;
double d;
int tzoffset = 0;
duk_push_this(ctx);
h = duk_get_hobject(ctx, -1); /* FIXME: getter with class check, useful in built-ins */
if (h == NULL || DUK_HOBJECT_GET_CLASS_NUMBER(h) != DUK_HOBJECT_CLASS_DATE) {
DUK_ERROR(thr, DUK_ERR_TYPE_ERROR, "expected Date");
}
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_VALUE);
d = duk_to_number(ctx, -1);
duk_pop(ctx);
if (DUK_ISNAN(d)) {
if (flags & FLAG_NAN_TO_ZERO) {
d = 0.0;
}
if (flags & FLAG_NAN_TO_RANGE_ERROR) {
DUK_ERROR(thr, DUK_ERR_RANGE_ERROR, "Invalid Date");
}
}
/* if no NaN handling flag, may still be NaN here, but not Inf */
DUK_ASSERT(!DUK_ISINF(d));
if (flags & FLAG_LOCALTIME) {
/* Note: DST adjustment is determined using UTC time.
* If 'd' is NaN, tzoffset will be 0.
*/
tzoffset = GET_LOCAL_TZOFFSET(d); /* seconds */
d += tzoffset * 1000;
}
if (out_tzoffset) {
*out_tzoffset = tzoffset;
}
/* [ ... this ] */
return d;
}
