Various user-contributed fixes (Issue 701, Issue 710, Issue 714, Issue 718)

git-svn-id: https://zxing.googlecode.com/svn/trunk@1717 59b500cc-1b3d-0410-9834-0bbf25fbcc57

core/src/com/google/zxing/common/detector/WhiteRectangleDetector.java

@@ -42,8 +42,11 @@ public final class WhiteRectangleDetector {
   private final int rightInit;
   private final int downInit;
   private final int upInit;
-  
-  public WhiteRectangleDetector(BitMatrix image) {
+
+  /**
+   * @throws NotFoundException if image is too small
+   */
+  public WhiteRectangleDetector(BitMatrix image) throws NotFoundException {
     this.image = image;
     height = image.getHeight();
     width = image.getWidth();
@@ -51,17 +54,26 @@ public final class WhiteRectangleDetector {
     rightInit = (width + INIT_SIZE) >> 1;
     upInit = (height - INIT_SIZE) >> 1;
     downInit = (height + INIT_SIZE) >> 1;
+    if (upInit < 0 || leftInit < 0 || downInit >= height || rightInit >= width) {
+      throw NotFoundException.getNotFoundInstance();
+    }
   }
-  
-  public WhiteRectangleDetector(BitMatrix image, int INIT_SIZE, int x, int y) {
-	    this.image = image;
-	    height = image.getHeight();
-	    width = image.getWidth();
-	    int halfsize = INIT_SIZE >> 1;
-	    leftInit = x - halfsize;
-	    rightInit = x + halfsize;
-	    upInit = y - halfsize;
-	    downInit = y + halfsize;
+
+  /**
+   * @throws NotFoundException if image is too small
+   */
+  public WhiteRectangleDetector(BitMatrix image, int initSize, int x, int y) throws NotFoundException {
+    this.image = image;
+    height = image.getHeight();
+    width = image.getWidth();
+    int halfsize = initSize >> 1;
+    leftInit = x - halfsize;
+    rightInit = x + halfsize;
+    upInit = y - halfsize;
+    downInit = y + halfsize;
+    if (upInit < 0 || leftInit < 0 || downInit >= height || rightInit >= width) {
+      throw NotFoundException.getNotFoundInstance();
+    }
   }
 
   /**
@@ -71,7 +83,7 @@ public final class WhiteRectangleDetector {
    * region until it finds a white rectangular region.
    * </p>
    *
-   * @return {@link ResultPoint}[] describing the corners of the rectangular
+   * @return {@link ResultPoint[]} describing the corners of the rectangular
    *         region. The first and last points are opposed on the diagonal, as
    *         are the second and third. The first point will be the topmost
    *         point and the last, the bottommost. The second point will be

core/src/com/google/zxing/datamatrix/decoder/DecodedBitStreamParser.java

@@ -401,7 +401,7 @@ final class DecodedBitStreamParser {
         int edifactValue = bits.readBits(6);
 
         // Check for the unlatch character
-        if (edifactValue == 0x2B67) {  // 011111
+        if (edifactValue == 0x1F) {  // 011111
           unlatch = true;
           // If we encounter the unlatch code then continue reading because the Codeword triple
           // is padded with 0's
@@ -423,14 +423,15 @@ final class DecodedBitStreamParser {
   private static void decodeBase256Segment(BitSource bits, StringBuffer result, Vector byteSegments)
       throws FormatException {
     // Figure out how long the Base 256 Segment is.
-    int d1 = bits.readBits(8);
+    int codewordPosition = 2;
+    int d1 = unrandomize255State(bits.readBits(8), codewordPosition++);
     int count;
     if (d1 == 0) {  // Read the remainder of the symbol
       count = bits.available() / 8;
     } else if (d1 < 250) {
       count = d1;
     } else {
-      count = 250 * (d1 - 249) + bits.readBits(8);
+      count = 250 * (d1 - 249) + unrandomize255State(bits.readBits(8), codewordPosition++);
     }
     byte[] bytes = new byte[count];
     for (int i = 0; i < count; i++) {
@@ -439,7 +440,7 @@ final class DecodedBitStreamParser {
       if (bits.available() < 8) {
         throw FormatException.getFormatInstance();
       }
-      bytes[i] = unrandomize255State(bits.readBits(8), i);
+      bytes[i] = unrandomize255State(bits.readBits(8), codewordPosition++);
     }
     byteSegments.addElement(bytes);
     try {

core/src/com/google/zxing/datamatrix/detector/Detector.java

@@ -46,7 +46,7 @@ public final class Detector {
   private final BitMatrix image;
   private final WhiteRectangleDetector rectangleDetector;
 
-  public Detector(BitMatrix image) {
+  public Detector(BitMatrix image) throws NotFoundException {
     this.image = image;
     rectangleDetector = new WhiteRectangleDetector(image);
   }

core/src/com/google/zxing/pdf417/decoder/DecodedBitStreamParser.java

@@ -252,7 +252,7 @@ final class DecodedBitStreamParser {
           } else {
             if (subModeCh == 26) {
               ch = ' ';
-            } else if (subModeCh == AL) {
+            } else if (subModeCh == AS) {
               subMode = ALPHA;
             } else if (subModeCh == ML) {
               subMode = MIXED;

core/test/data/blackbox/datamatrix-1/0123456789.txt

@@ -0,0 +1 @@
+0123456789

core/test/src/com/google/zxing/datamatrix/DataMatrixBlackBox1TestCase.java

@@ -27,10 +27,10 @@ public final class DataMatrixBlackBox1TestCase extends AbstractBlackBoxTestCase
 
   public DataMatrixBlackBox1TestCase() {
     super("test/data/blackbox/datamatrix-1", new MultiFormatReader(), BarcodeFormat.DATA_MATRIX);
-    addTest(16, 16, 0.0f);
-    addTest(16, 16, 90.0f);
-    addTest(16, 16, 180.0f);
-    addTest(16, 16, 270.0f);
+    addTest(17, 17, 0.0f);
+    addTest(17, 17, 90.0f);
+    addTest(17, 17, 180.0f);
+    addTest(17, 17, 270.0f);
   }
 
 }

cpp/SConscript

@@ -17,7 +17,7 @@ if env['PIC']:
 	flags.append("-fPIC")
 
 compile_options['CXXFLAGS'] = ' '.join(flags)
-
+compile_options['LINKFLAGS'] = "-ldl"
 
 def all_files(dir, ext='.cpp', level=5):
 	files = []