Bug 1352082 - Avoid shifting a signed integer left in C++.

Tag UXP Issue #1344

parser/html/java/htmlparser/src/nu/validator/htmlparser/annotation/Unsigned.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2017 Mozilla Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * Applied to an integer type to generate the unsigned variant in C++.
+ */
+package nu.validator.htmlparser.annotation;
+
+public @interface Unsigned {
+
+}

parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/AttributeName.java

@@ -31,6 +31,7 @@ import nu.validator.htmlparser.annotation.NoLength;
 import nu.validator.htmlparser.annotation.NsUri;
 import nu.validator.htmlparser.annotation.Prefix;
 import nu.validator.htmlparser.annotation.QName;
+import nu.validator.htmlparser.annotation.Unsigned;
 import nu.validator.htmlparser.annotation.Virtual;
 import nu.validator.htmlparser.common.Interner;
 
@@ -278,7 +279,7 @@ public final class AttributeName
             // ]NOCPP]
             , Interner interner) {
         // XXX deal with offset
-        int hash = AttributeName.bufToHash(buf, length);
+        @Unsigned int hash = AttributeName.bufToHash(buf, length);
         int index = Arrays.binarySearch(AttributeName.ATTRIBUTE_HASHES, hash);
         if (index < 0) {
             return AttributeName.createAttributeName(
@@ -312,9 +313,9 @@ public final class AttributeName
      * @param len
      * @return
      */
-    private static int bufToHash(@NoLength char[] buf, int len) {
-        int hash2 = 0;
-        int hash = len;
+    private static @Unsigned int bufToHash(@NoLength char[] buf, int len) {
+        @Unsigned int hash2 = 0;
+        @Unsigned int hash = len;
         hash <<= 5;
         hash += buf[0] - 0x60;
         int j = len;
@@ -396,7 +397,7 @@ public final class AttributeName
             @Local @NoLength String[] local, @Prefix @NoLength String[] prefix
             // [NOCPP[
             , int flags
-    // ]NOCPP]        
+    // ]NOCPP]
     ) {
         this.uri = uri;
         this.local = local;

parser/html/java/htmlparser/src/nu/validator/htmlparser/impl/ElementName.java

@@ -29,6 +29,7 @@ import java.util.Arrays;
 import nu.validator.htmlparser.annotation.Inline;
 import nu.validator.htmlparser.annotation.Local;
 import nu.validator.htmlparser.annotation.NoLength;
+import nu.validator.htmlparser.annotation.Unsigned;
 import nu.validator.htmlparser.annotation.Virtual;
 import nu.validator.htmlparser.common.Interner;
 
@@ -110,7 +111,7 @@ public final class ElementName
     }
 
     static ElementName elementNameByBuffer(@NoLength char[] buf, int offset, int length, Interner interner) {
-        int hash = ElementName.bufToHash(buf, length);
+        @Unsigned int hash = ElementName.bufToHash(buf, length);
         int index = Arrays.binarySearch(ElementName.ELEMENT_HASHES, hash);
         if (index < 0) {
             return new ElementName(Portability.newLocalNameFromBuffer(buf, offset, length, interner));
@@ -133,8 +134,8 @@ public final class ElementName
      * @param len
      * @return
      */
-    private static int bufToHash(@NoLength char[] buf, int len) {
-        int hash = len;
+    private static @Unsigned int bufToHash(@NoLength char[] buf, int len) {
+        @Unsigned int hash = len;
         hash <<= 5;
         hash += buf[0] - 0x60;
         int j = len;

parser/html/java/htmlparser/translator-src/nu/validator/htmlparser/cpptranslate/AnnotationHelperVisitor.java

@@ -72,6 +72,10 @@ public class AnnotationHelperVisitor<T> extends VoidVisitorAdapter<T> {
         return hasAnnotation("NoLength");
     }
 
+    protected boolean unsigned() {
+        return hasAnnotation("Unsigned");
+    }
+
     protected boolean auto() {
         return hasAnnotation("Auto");
     }

parser/html/java/htmlparser/translator-src/nu/validator/htmlparser/cpptranslate/CppTypes.java

@@ -192,6 +192,10 @@ public class CppTypes {
         return "int32_t";
     }
 
+    public String unsignedIntType() {
+        return "uint32_t";
+    }
+
     public String stringType() {
         return "nsHtml5String";
     }

parser/html/java/htmlparser/translator-src/nu/validator/htmlparser/cpptranslate/CppVisitor.java

@@ -548,7 +548,11 @@ public class CppVisitor extends AnnotationHelperVisitor<LocalSymbolTable> {
             case Float:
                 throw new IllegalStateException("Unsupported primitive.");
             case Int:
-                printer.print(cppTypes.intType());
+                if (unsigned()) {
+                    printer.print(cppTypes.unsignedIntType());
+                } else {
+                    printer.print(cppTypes.intType());
+                }
                 break;
             case Long:
                 throw new IllegalStateException("Unsupported primitive.");