From: Valentin Bartenev <vbart@nginx.com>
Date: Sun, 6 Nov 2016 13:03:03 +0000 (+0300)
Subject: Various Number constants.
X-Git-Tag: 0.1.5~15
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=62aeb3ed111672456482fa75aecfdb0d05983512;p=njs.git

Various Number constants.
---

diff --git a/njs/njs_number.c b/njs/njs_number.c
index b3427556..66dea2ba 100644
--- a/njs/njs_number.c
+++ b/njs/njs_number.c
@@ -22,6 +22,15 @@
 #include <njs_function.h>
 #include <string.h>
 #include <stdio.h>
+#include <float.h>
+
+
+/*
+ * 2^53 - 1 is the largest integer n such that n and n + 1
+ * as well as -n and -n - 1 are all exactly representable
+ * in the IEEE-754 format.
+ */
+#define NJS_MAX_SAFE_INTEGER  ((1LL << 53) - 1)
 
 
 static njs_ret_t njs_number_to_string_radix(njs_vm_t *vm, njs_value_t *string,
@@ -273,6 +282,57 @@ static const njs_object_prop_t  njs_number_constructor_properties[] =
         .name = njs_string("prototype"),
         .value = njs_native_getter(njs_object_prototype_create),
     },
+
+    /* ES6. */
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_string("EPSILON"),
+        .value = njs_value(NJS_NUMBER, 1, DBL_EPSILON),
+    },
+
+    /* ES6. */
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_long_string("MAX_SAFE_INTEGER"),
+        .value = njs_value(NJS_NUMBER, 1, NJS_MAX_SAFE_INTEGER),
+    },
+
+    /* ES6. */
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_long_string("MIN_SAFE_INTEGER"),
+        .value = njs_value(NJS_NUMBER, 1, -NJS_MAX_SAFE_INTEGER),
+    },
+
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_string("MAX_VALUE"),
+        .value = njs_value(NJS_NUMBER, 1, DBL_MAX),
+    },
+
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_string("MIN_VALUE"),
+        .value = njs_value(NJS_NUMBER, 1, DBL_MIN),
+    },
+
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_string("NaN"),
+        .value = njs_value(NJS_NUMBER, 0, NAN),
+    },
+
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_long_string("POSITIVE_INFINITY"),
+        .value = njs_value(NJS_NUMBER, 1, INFINITY),
+    },
+
+    {
+        .type = NJS_PROPERTY,
+        .name = njs_long_string("NEGATIVE_INFINITY"),
+        .value = njs_value(NJS_NUMBER, 1, -INFINITY),
+    },
 };