Add a method to convert unsigned C integer into V8 Integer.

Review URL: http://codereview.chromium.org/260002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3013 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -1063,6 +1063,7 @@ class V8EXPORT Number : public Primitive {
 class V8EXPORT Integer : public Number {
  public:
   static Local<Integer> New(int32_t value);
+  static inline Local<Integer> New(uint32_t value);
   int64_t Value() const;
   static inline Integer* Cast(v8::Value* obj);
  private:
@@ -3026,6 +3027,16 @@ Number* Number::Cast(v8::Value* value) {
 }
 
 
+Local<Integer> Integer::New(uint32_t value) {
+  // If highest bit is not set, chances are it's SMI.
+  bool could_be_smi = (value & (1 << 31)) == 0;
+  if (could_be_smi) {
+    return Integer::New(static_cast<int32_t>(value));
+  }
+  return Local<Integer>::Cast(Number::New(value));
+}
+
+
 Integer* Integer::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);

src/checks.h

@@ -80,6 +80,25 @@ static inline void CheckEqualsHelper(const char* file, int line,
   }
 }
 
+// Helper function used by the CHECK_EQ function when given int64_t
+// arguments.  Should not be called directly.
+static inline void CheckEqualsHelper(const char* file, int line,
+                                     const char* expected_source,
+                                     int64_t expected,
+                                     const char* value_source,
+                                     int64_t value) {
+  if (expected != value) {
+    // Sorry, printing int64_t in a fanky hex way,
+    // that's our mother tongue after all :)
+    V8_Fatal(file, line,
+             "CHECK_EQ(%s, %s) failed\n#"
+             "   Expected: 0x%08x%08x\n#   Found: 0x%08x%08x",
+             expected_source, value_source,
+             uint32_t(expected >> 32), uint32_t(expected),
+             uint32_t(value >> 32), uint32_t(value));
+  }
+}
+
 
 // Helper function used by the CHECK_NE function when given int
 // arguments.  Should not be called directly.

test/cctest/test-api.cc

@@ -702,6 +702,75 @@ THREADED_TEST(PropertyHandler) {
 }
 
 
+THREADED_TEST(TinyInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  int32_t value = 239;
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigSmiInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  int32_t value = (1 << 30) - 1;
+  CHECK(i::Smi::IsValid(value));
+  CHECK(!i::Smi::IsValid(value + 1));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  int32_t value = (1 << 30) + 1;
+  CHECK(!i::Smi::IsValid(value));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(TinyUnsignedInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = 239;
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigUnsignedSmiInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = (1 << 30) - 1;
+  CHECK(i::Smi::IsValid(value));
+  CHECK(!i::Smi::IsValid(value + 1));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigUnsignedInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = (1 << 30) + 1;
+  CHECK(!i::Smi::IsValid(value));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
+THREADED_TEST(OutOfSignedRangeUnsignedInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = uint32_t(0xffffffff);
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(int64_t(value), value_obj->Value());
+}
+
+
 THREADED_TEST(Number) {
   v8::HandleScope scope;
   LocalContext env;