From ac91c54ce1b5904a65adcd15dfc1dd7b94bcafe3 Mon Sep 17 00:00:00 2001
From: Project Nayuki <me@nayuki.io>
Date: Fri, 21 Apr 2017 15:37:59 +0000
Subject: [PATCH] Fixed QrSegment.getTotalBits() Java logic to catch integer
 overflow correctly (related to the C++ fix in commit 873652a82f21).

---
 java/io/nayuki/qrcodegen/QrSegment.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/java/io/nayuki/qrcodegen/QrSegment.java b/java/io/nayuki/qrcodegen/QrSegment.java
index 59aa5df..6c0ff5a 100644
--- a/java/io/nayuki/qrcodegen/QrSegment.java
+++ b/java/io/nayuki/qrcodegen/QrSegment.java
@@ -189,16 +189,18 @@ public final class QrSegment {
 		if (version < 1 || version > 40)
 			throw new IllegalArgumentException("Version number out of range");
 		
-		int result = 0;
+		long result = 0;
 		for (QrSegment seg : segs) {
 			Objects.requireNonNull(seg);
 			int ccbits = seg.mode.numCharCountBits(version);
 			// Fail if segment length value doesn't fit in the length field's bit-width
 			if (seg.numChars >= (1 << ccbits))
 				return -1;
-			result += 4 + ccbits + seg.bitLength;
+			result += 4L + ccbits + seg.bitLength;
+			if (result > Integer.MAX_VALUE)
+				return -1;
 		}
-		return result;
+		return (int)result;
 	}