From c35ca6492e0c8050f316faa0aa7ceb8bdf13a9f6 Mon Sep 17 00:00:00 2001
From: Elnur Ismailzada <eismailzada@gmail.com>
Date: Fri, 17 May 2019 00:43:11 +0200
Subject: [PATCH] simultaneous recognition UPC/EAN and UPC_EAN_EXTENCION

---
 src/QZXing.cpp                  | 12 ++++++++++++
 src/zxing/zxing/DecodeHints.cpp | 17 +++++++++++++++++
 src/zxing/zxing/DecodeHints.h   |  2 ++
 3 files changed, 31 insertions(+)

diff --git a/src/QZXing.cpp b/src/QZXing.cpp
index 522b170..8cd15c6 100644
--- a/src/QZXing.cpp
+++ b/src/QZXing.cpp
@@ -422,6 +422,18 @@ QString QZXing::decodeImage(const QImage &image, int maxWidth, int maxHeight, bo
                 lastDecodeOperationSucceded_ = true;
             } catch(zxing::Exception &/*e*/) {}
 
+            if (!lastDecodeOperationSucceded_ &&
+                    hints.containsFormat(BarcodeFormat::UPC_EAN_EXTENSION) &&
+                    !(hints & DecodeHints::PRODUCT_HINT).isEmpty() ) {
+                hints.setAllowedEanExtensions(std::set<int>());
+
+                try {
+                    res = decoder->decode(bb, hints);
+                    processingTime = t.elapsed();
+                    lastDecodeOperationSucceded_ = true;
+                } catch(zxing::Exception &/*e*/) {}
+            }
+
             if (tryHarder_ && bb->isRotateSupported()) {
                 Ref<BinaryBitmap> bbTmp = bb;
 
diff --git a/src/zxing/zxing/DecodeHints.cpp b/src/zxing/zxing/DecodeHints.cpp
index 63b9c62..3c358ce 100644
--- a/src/zxing/zxing/DecodeHints.cpp
+++ b/src/zxing/zxing/DecodeHints.cpp
@@ -189,3 +189,20 @@ zxing::DecodeHints zxing::operator | (DecodeHints const& l, DecodeHints const& r
 
   return result;
 }
+
+zxing::DecodeHints zxing::operator & (DecodeHints const& l, DecodeHints const& r) {
+  DecodeHints result (l);
+  result.hints &= r.hints;
+  if (!result.callback) {
+    result.callback = r.callback;
+  }
+
+  std::set<int> intersect;
+  std::set_intersection(l.allowedEanExtensions.begin(), l.allowedEanExtensions.end(),
+                        r.allowedEanExtensions.begin(), r.allowedEanExtensions.end(),
+                        std::inserter(intersect, intersect.begin()));
+
+  result.allowedEanExtensions = intersect;
+
+  return result;
+}
diff --git a/src/zxing/zxing/DecodeHints.h b/src/zxing/zxing/DecodeHints.h
index f5261b4..b24e349 100644
--- a/src/zxing/zxing/DecodeHints.h
+++ b/src/zxing/zxing/DecodeHints.h
@@ -30,6 +30,7 @@ namespace zxing {
 typedef unsigned int DecodeHintType;
 class DecodeHints;
 DecodeHints operator | (DecodeHints const&, DecodeHints const&);
+DecodeHints operator & (DecodeHints const&, DecodeHints const&);
 
 class DecodeHints {
  private:
@@ -87,6 +88,7 @@ class DecodeHints {
   DecodeHints& operator =(DecodeHints const &other);
 
   friend DecodeHints operator| (DecodeHints const&, DecodeHints const&);
+  friend DecodeHints operator& (DecodeHints const&, DecodeHints const&);
 };
 
 }