details: http://hg.nginx.org/njs/rev/d7a10c0dfcce
branches:
changeset: 233:d7a10c0dfcce
user: Valentin Bartenev <vbart@nginx.com>
date: Mon Oct 31 16:28:12 2016 +0300
description:
Math.sign() method.

diffstat:

njs/njs_math.c | 31 +++++++++++++++++++++++++++++++
njs/test/njs_unit_test.c | 18 ++++++++++++++++++
2 files changed, 49 insertions(+), 0 deletions(-)

diffs (76 lines):

diff -r 1f68ffabcea9 -r d7a10c0dfcce njs/njs_math.c
--- a/njs/njs_math.c Mon Oct 31 16:25:54 2016 +0300
+++ b/njs/njs_math.c Mon Oct 31 16:28:12 2016 +0300
@@ -334,6 +334,29 @@ njs_object_math_round(njs_vm_t *vm, njs_


static njs_ret_t
+njs_object_math_sign(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
+ njs_index_t unused)
+{
+ double num;
+
+ if (nargs > 1) {
+ num = args[1].data.u.number;
+
+ if (!njs_is_nan(num) && num != 0) {
+ num = signbit(num) ? -1 : 1;
+ }
+
+ } else {
+ num = NJS_NAN;
+ }
+
+ njs_number_set(&vm->retval, num);
+
+ return NXT_OK;
+}
+
+
+static njs_ret_t
njs_object_math_sin(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
njs_index_t unused)
{
@@ -567,6 +590,14 @@ static const njs_object_prop_t njs_math
NJS_SKIP_ARG, NJS_NUMBER_ARG),
},

+ /* ES6. */
+ {
+ .type = NJS_METHOD,
+ .name = njs_string("sign"),
+ .value = njs_native_function(njs_object_math_sign, 0,
+ NJS_SKIP_ARG, NJS_NUMBER_ARG),
+ },
+
{
.type = NJS_METHOD,
.name = njs_string("sin"),
diff -r 1f68ffabcea9 -r d7a10c0dfcce njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c Mon Oct 31 16:25:54 2016 +0300
+++ b/njs/test/njs_unit_test.c Mon Oct 31 16:28:12 2016 +0300
@@ -5373,6 +5373,24 @@ static njs_unit_test_t njs_test[] =
{ nxt_string("Math.pow()"),
nxt_string("NaN") },

+ { nxt_string("Math.sign(5)"),
+ nxt_string("1") },
+
+ { nxt_string("Math.sign(-5)"),
+ nxt_string("-1") },
+
+ { nxt_string("Math.sign(0)"),
+ nxt_string("0") },
+
+ { nxt_string("Math.sign(-0.0)"),
+ nxt_string("-0") },
+
+ { nxt_string("Math.sign(NaN)"),
+ nxt_string("NaN") },
+
+ { nxt_string("Math.sign()"),
+ nxt_string("NaN") },
+
{ nxt_string("Math.trunc(3.9)"),
nxt_string("3") },


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