From: Igor Sysoev <igor@sysoev.ru>
Date: Wed, 16 Nov 2016 12:21:07 +0000 (+0300)
Subject: A workround for Solaris bugs in acos() and asin().
X-Git-Tag: 0.1.6~21
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=24116f92422981a82d0de0e3505ee4913634ffff;p=njs.git

A workround for Solaris bugs in acos() and asin().
---

diff --git a/njs/njs_math.c b/njs/njs_math.c
index 2281e276..fbae9a66 100644
--- a/njs/njs_math.c
+++ b/njs/njs_math.c
@@ -47,7 +47,16 @@ njs_object_math_acos(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
     double  num;
 
     if (nargs > 1) {
-        num = acos(args[1].data.u.number);
+        num = args[1].data.u.number;
+
+#if (NXT_SOLARIS)
+        /* On Solaris acos(x) returns 0 for x > 1. */
+        if (fabs(num) > 1.0) {
+            num = NAN;
+        }
+#endif
+
+        num = acos(num);
 
     } else {
         num = NAN;
@@ -66,7 +75,16 @@ njs_object_math_asin(njs_vm_t *vm, njs_value_t *args, nxt_uint_t nargs,
     double  num;
 
     if (nargs > 1) {
-        num = asin(args[1].data.u.number);
+        num = args[1].data.u.number;
+
+#if (NXT_SOLARIS)
+        /* On Solaris asin(x) returns 0 for x > 1. */
+        if (fabs(num) > 1.0) {
+            num = NAN;
+        }
+#endif
+
+        num = asin(num);
 
     } else {
         num = NAN;