From feab1f34541b194b33fc137498a69318e979d63d Mon Sep 17 00:00:00 2001
From: "Ruben J. Garcia-Hernandez" <garcia@lrz.de>
Date: Thu, 23 Sep 2021 08:16:02 +0200
Subject: [PATCH] Fix 32-bit limitation showcased at
 https://github.com/Stuk/jszip/issues/777 which causes Bug : uncompressed data
 size mismatch

---
 dist/jszip.js            | 4 ++--
 lib/reader/DataReader.js | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/dist/jszip.js b/dist/jszip.js
index 9f0ffc1d..aaca594e 100644
--- a/dist/jszip.js
+++ b/dist/jszip.js
@@ -1855,7 +1855,7 @@ DataReader.prototype = {
             i;
         this.checkOffset(size);
         for (i = this.index + size - 1; i >= this.index; i--) {
-            result = (result << 8) + this.byteAt(i);
+            result = (result * 256) + this.byteAt(i);
         }
         this.index += size;
         return result;
@@ -11367,4 +11367,4 @@ module.exports = typeof setImmediate === 'function' ? setImmediate :
 	};
 
 },{}]},{},[10])(10)
-});
\ No newline at end of file
+});
diff --git a/lib/reader/DataReader.js b/lib/reader/DataReader.js
index c4e1e03b..5dae5e57 100644
--- a/lib/reader/DataReader.js
+++ b/lib/reader/DataReader.js
@@ -61,7 +61,7 @@ DataReader.prototype = {
             i;
         this.checkOffset(size);
         for (i = this.index + size - 1; i >= this.index; i--) {
-            result = (result << 8) + this.byteAt(i);
+            result = (result * 256) + this.byteAt(i);
         }
         this.index += size;
         return result;