Fix pretty clear bug on Code 128 and 39 readers: reject empty barcodes as a false...

[zxing.git] / core / src / com / google / zxing / oned / Code39Reader.java

diff --git a/core/src/com/google/zxing/oned/Code39Reader.java b/core/src/com/google/zxing/oned/Code39Reader.java
index 2811312..12f36b1 100644 (file)
--- a/core/src/com/google/zxing/oned/Code39Reader.java
+++ b/core/src/com/google/zxing/oned/Code39Reader.java
@@ -138,6 +138,12 @@ public final class Code39Reader extends AbstractOneDReader {
     if (extendedMode) {
       resultString = decodeExtended(resultString);
     }
+
+    if (resultString.length() == 0) {
+      // Almost surely a false positive
+      throw new ReaderException("Empty barcode found; assuming a false positive");
+    }
+
     float left = (float) (start[1] + start[0]) / 2.0f;
     float right = (float) (nextStart + lastStart) / 2.0f;
     return new Result(