[pypy-commit] lang-js default: 15.8.2.2

[stepahn]

Author: Stephan <stephan at stzal.com>
Branch: 
Changeset: r213:1dffc858a8dd
Date: 2012-05-22 18:25 +0200
http://bitbucket.org/pypy/lang-js/changeset/1dffc858a8dd/

Log:	15.8.2.2

diff --git a/js/builtins_math.py b/js/builtins_math.py
--- a/js/builtins_math.py
+++ b/js/builtins_math.py
@@ -22,6 +22,8 @@
     put_native_function(w_Math, 'log', js_log, params = ['x'])
     put_native_function(w_Math, 'sin', js_sin, params = ['x'])
     put_native_function(w_Math, 'tan', js_tan, params = ['x'])
+    put_native_function(w_Math, 'acos', js_acos, params = ['x'])
+
 
     # 15.8.1
 
@@ -223,6 +225,19 @@
 
     return math.tan(x)
 
+# 15.8.2.2
+def js_acos(this, args):
+    arg0 = get_arg(args, 0)
+    x = arg0.ToNumber()
+
+    if isnan(x) or isinf(x):
+        return NAN
+
+    if x > 1 or x < -1:
+        return NAN
+
+    return math.acos(x)
+
 import time
 from pypy.rlib import rrandom
 _random = rrandom.Random(int(time.time()))