Introduce v8::Integer::NewFromUnsigned method.

Review URL: http://codereview.chromium.org/251100

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3038 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> NewFromUnsigned(uint32_t value);
   int64_t Value() const;
   static inline Integer* Cast(v8::Value* obj);
  private:
@@ -3045,6 +3046,15 @@ Number* Number::Cast(v8::Value* value) {
 }
 
 
+Local<Integer> Integer::NewFromUnsigned(uint32_t value) {
+  bool fits_into_int32_t = (value & (1 << 31)) == 0;
+  if (fits_into_int32_t) {
+    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 +80,27 @@ 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) {
+    // Print int64_t values in hex, as two int32s,
+    // to avoid platform-dependencies.
+    V8_Fatal(file, line,
+             "CHECK_EQ(%s, %s) failed\n#"
+             "   Expected: 0x%08x%08x\n#   Found: 0x%08x%08x",
+             expected_source, value_source,
+             static_cast<uint32_t>(expected >> 32),
+             static_cast<uint32_t>(expected),
+             static_cast<uint32_t>(value >> 32),
+             static_cast<uint32_t>(value));
+  }
+}
+
 
 // Helper function used by the CHECK_NE function when given int
 // arguments.  Should not be called directly.

src/x64/macro-assembler-x64.cc

@@ -1463,7 +1463,7 @@ void MacroAssembler::SmiTryAddConstant(Register dst,
                                        Smi* constant,
                                        Label* on_not_smi_result) {
   // Does not assume that src is a smi.
-  ASSERT_EQ(1, kSmiTagMask);
+  ASSERT_EQ(static_cast<intptr_t>(1), kSmiTagMask);
   ASSERT_EQ(0, kSmiTag);
 
   Register tmp = (src.is(dst) ? kScratchRegister : dst);

test/cctest/test-api.cc

@@ -25,8 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include <stdlib.h>
-
 #include "v8.h"
 
 #include "api.h"
@@ -702,6 +700,79 @@ 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(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigSmiInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  int32_t value = i::Smi::kMaxValue;
+  CHECK(i::Smi::IsValid(value));
+  CHECK(!i::Smi::IsValid(value + 1));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  int32_t value = i::Smi::kMaxValue + 1;
+  CHECK(value > i::Smi::kMaxValue);
+  CHECK(!i::Smi::IsValid(value));
+  Local<v8::Integer> value_obj = v8::Integer::New(value);
+  CHECK_EQ(static_cast<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::NewFromUnsigned(value);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigUnsignedSmiInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = static_cast<uint32_t>(i::Smi::kMaxValue);
+  CHECK(i::Smi::IsValid(value));
+  CHECK(!i::Smi::IsValid(value + 1));
+  Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
+THREADED_TEST(BigUnsignedInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t value = static_cast<uint32_t>(i::Smi::kMaxValue) + 1;
+  CHECK(value > static_cast<uint32_t>(i::Smi::kMaxValue));
+  CHECK(!i::Smi::IsValid(value));
+  Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
+THREADED_TEST(OutOfSignedRangeUnsignedInteger) {
+  v8::HandleScope scope;
+  LocalContext env;
+  uint32_t INT32_MAX_AS_UINT = (1U << 31) - 1;
+  uint32_t value = INT32_MAX_AS_UINT + 1;
+  CHECK(value > INT32_MAX_AS_UINT);  // No overflow.
+  Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+}
+
+
 THREADED_TEST(Number) {
   v8::HandleScope scope;
   LocalContext env;