From e44b9d6a9ea7fec734624ad21acd97bfc13aaaf8 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Wed, 11 Jun 2014 13:42:56 -0700
Subject: DETERMINISTIC option

---
 src/deterministic.js | 21 +++++++++++++++++++++
 src/determinstic.js  | 20 --------------------
 src/jsifier.js       |  3 +++
 src/settings.js      |  3 +++
 4 files changed, 27 insertions(+), 20 deletions(-)
 create mode 100644 src/deterministic.js
 delete mode 100644 src/determinstic.js

(limited to 'src')

diff --git a/src/deterministic.js b/src/deterministic.js
new file mode 100644
index 00000000..4e9508f3
--- /dev/null
+++ b/src/deterministic.js
@@ -0,0 +1,21 @@
+
+var MAGIC = 0;
+Math.random = function() {
+  MAGIC = Math.pow(MAGIC + 1.8912, 3) % 1;
+  return MAGIC;
+};
+var TIME = 10000;
+Date.now = function() {
+  return TIME++;
+};
+if (typeof performance === 'object') performance.now = Date.now;
+
+function hashMemory(id) {
+  var ret = 0;
+  var len = Math.max(DYNAMICTOP, STATICTOP);
+  for (var i = 0; i < len; i++) {
+    ret = (ret*17 + HEAPU8[i])|0;
+  }
+  printErr(id + ':' + ret);
+}
+
diff --git a/src/determinstic.js b/src/determinstic.js
deleted file mode 100644
index 1ec0bbfe..00000000
--- a/src/determinstic.js
+++ /dev/null
@@ -1,20 +0,0 @@
-
-var MAGIC = 0;
-Math.random = function() {
-  MAGIC = Math.pow(MAGIC + 1.8912, 3) % 1;
-  return MAGIC;
-};
-var TIME = 10000;
-Date.now = function() {
-  return TIME++;
-};
-performance.now = Date.now;
-
-function hashMemory(id) {
-  var ret = 0;
-  for (var i = 0; i < HEAPU8.length; i++) {
-    ret = (ret*17 + HEAPU8[i])|0;
-  }
-  print(id + ':' + ret);
-}
-
diff --git a/src/jsifier.js b/src/jsifier.js
index 791273f4..a7a53803 100644
--- a/src/jsifier.js
+++ b/src/jsifier.js
@@ -1901,6 +1901,9 @@ function JSify(data, functionsOnly) {
     if (PROXY_TO_WORKER) {
       print(read('proxyWorker.js'));
     }
+    if (DETERMINISTIC) {
+      print(read('deterministic.js'));
+    }
     if (RUNTIME_TYPE_INFO) {
       Types.cleanForRuntime();
       print('Runtime.typeInfo = ' + JSON.stringify(Types.types));
diff --git a/src/settings.js b/src/settings.js
index a8761d90..26883051 100644
--- a/src/settings.js
+++ b/src/settings.js
@@ -478,6 +478,9 @@ var HEADLESS = 0; // If 1, will include shim code that tries to 'fake' a browser
                   // very partial - it is hard to fake a whole browser! - so
                   // keep your expectations low for this to work.
 
+var DETERMINISTIC = 0; // If 1, we force Date.now(), Math.random, etc. to return deterministic
+                       // results. Good for comparing builds for debugging purposes (and nothing else)
+
 var BENCHMARK = 0; // If 1, will just time how long main() takes to execute, and not
                    // print out anything at all whatsoever. This is useful for benchmarking.
 
-- 
cgit v1.2.3-18-g5258