Provide (non Gay) dtoa for fixed notation.

test/cctest/test-fixed-dtoa.cc

Index: test/cctest/test-fixed-dtoa.cc
===================================================================
--- test/cctest/test-fixed-dtoa.cc	(revision 0)
+++ test/cctest/test-fixed-dtoa.cc	(revision 0)
@@ -0,0 +1,512 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (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 "platform.h"
+#include "cctest.h"
+#include "double.h"
+#include "fixed-dtoa.h"
+#include "gay-fixed.h"
+
+using namespace v8::internal;
+
+static const int kBufferSize = 500;
+
+TEST(FastFixedVariousDoubles) {
+  char buffer_container[kBufferSize];
+  Vector<char> buffer(buffer_container, kBufferSize);
+  int length;
+  int point;
+
+  CHECK(FastFixedDtoa(1.0, 1, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1.0, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1.0, 0, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0xFFFFFFFF, 5, buffer, &length, &point));
+  CHECK_EQ("4294967295", buffer.start());
+  CHECK_EQ(10, point);
+
+  CHECK(FastFixedDtoa(4294967296.0, 5, buffer, &length, &point));
+  CHECK_EQ("4294967296", buffer.start());
+  CHECK_EQ(10, point);
+
+  CHECK(FastFixedDtoa(1e21, 5, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  // CHECK_EQ(22, point);
+  CHECK_EQ(22, point);
+
+  CHECK(FastFixedDtoa(999999999999999868928.00, 2, buffer, &length, &point));
+  CHECK_EQ("999999999999999868928", buffer.start());
+  CHECK_EQ(21, point);
+
+  CHECK(FastFixedDtoa(6.9999999999999989514240000e+21, 5, buffer,
+                      &length, &point));
+  CHECK_EQ("6999999999999998951424", buffer.start());
+  CHECK_EQ(22, point);
+
+  CHECK(FastFixedDtoa(1.5, 5, buffer, &length, &point));
+  CHECK_EQ("15", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1.55, 5, buffer, &length, &point));
+  CHECK_EQ("155", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1.55, 1, buffer, &length, &point));
+  CHECK_EQ("16", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1.00000001, 15, buffer, &length, &point));
+  CHECK_EQ("100000001", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.1, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(0, point);
+
+  CHECK(FastFixedDtoa(0.01, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-1, point);
+
+  CHECK(FastFixedDtoa(0.001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-2, point);
+
+  CHECK(FastFixedDtoa(0.0001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-3, point);
+
+  CHECK(FastFixedDtoa(0.00001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-4, point);
+
+  CHECK(FastFixedDtoa(0.000001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-5, point);
+
+  CHECK(FastFixedDtoa(0.0000001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-6, point);
+
+  CHECK(FastFixedDtoa(0.00000001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-7, point);
+
+  CHECK(FastFixedDtoa(0.000000001, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-8, point);
+
+  CHECK(FastFixedDtoa(0.0000000001, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-9, point);
+
+  CHECK(FastFixedDtoa(0.00000000001, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-10, point);
+
+  CHECK(FastFixedDtoa(0.000000000001, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-11, point);
+
+  CHECK(FastFixedDtoa(0.0000000000001, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-12, point);
+
+  CHECK(FastFixedDtoa(0.00000000000001, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-13, point);
+
+  CHECK(FastFixedDtoa(0.000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-14, point);
+
+  CHECK(FastFixedDtoa(0.0000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-15, point);
+
+  CHECK(FastFixedDtoa(0.00000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-16, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-17, point);
+
+  CHECK(FastFixedDtoa(0.0000000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-18, point);
+
+  CHECK(FastFixedDtoa(0.00000000000000000001, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-19, point);
+
+  CHECK(FastFixedDtoa(0.10000000004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(0, point);
+
+  CHECK(FastFixedDtoa(0.01000000004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-1, point);
+
+  CHECK(FastFixedDtoa(0.00100000004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-2, point);
+
+  CHECK(FastFixedDtoa(0.00010000004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-3, point);
+
+  CHECK(FastFixedDtoa(0.00001000004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-4, point);
+
+  CHECK(FastFixedDtoa(0.00000100004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-5, point);
+
+  CHECK(FastFixedDtoa(0.00000010004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-6, point);
+
+  CHECK(FastFixedDtoa(0.00000001004, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-7, point);
+
+  CHECK(FastFixedDtoa(0.00000000104, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-8, point);
+
+  CHECK(FastFixedDtoa(0.0000000001000004, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-9, point);
+
+  CHECK(FastFixedDtoa(0.0000000000100004, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-10, point);
+
+  CHECK(FastFixedDtoa(0.0000000000010004, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-11, point);
+
+  CHECK(FastFixedDtoa(0.0000000000001004, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-12, point);
+
+  CHECK(FastFixedDtoa(0.0000000000000104, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-13, point);
+
+  CHECK(FastFixedDtoa(0.000000000000001000004, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-14, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000100004, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-15, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000010004, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-16, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000001004, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-17, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000000104, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-18, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000000014, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-19, point);
+
+  CHECK(FastFixedDtoa(0.10000000006, 10, buffer, &length, &point));
+  CHECK_EQ("1000000001", buffer.start());
+  CHECK_EQ(0, point);
+
+  CHECK(FastFixedDtoa(0.01000000006, 10, buffer, &length, &point));
+  CHECK_EQ("100000001", buffer.start());
+  CHECK_EQ(-1, point);
+
+  CHECK(FastFixedDtoa(0.00100000006, 10, buffer, &length, &point));
+  CHECK_EQ("10000001", buffer.start());
+  CHECK_EQ(-2, point);
+
+  CHECK(FastFixedDtoa(0.00010000006, 10, buffer, &length, &point));
+  CHECK_EQ("1000001", buffer.start());
+  CHECK_EQ(-3, point);
+
+  CHECK(FastFixedDtoa(0.00001000006, 10, buffer, &length, &point));
+  CHECK_EQ("100001", buffer.start());
+  CHECK_EQ(-4, point);
+
+  CHECK(FastFixedDtoa(0.00000100006, 10, buffer, &length, &point));
+  CHECK_EQ("10001", buffer.start());
+  CHECK_EQ(-5, point);
+
+  CHECK(FastFixedDtoa(0.00000010006, 10, buffer, &length, &point));
+  CHECK_EQ("1001", buffer.start());
+  CHECK_EQ(-6, point);
+
+  CHECK(FastFixedDtoa(0.00000001006, 10, buffer, &length, &point));
+  CHECK_EQ("101", buffer.start());
+  CHECK_EQ(-7, point);
+
+  CHECK(FastFixedDtoa(0.00000000106, 10, buffer, &length, &point));
+  CHECK_EQ("11", buffer.start());
+  CHECK_EQ(-8, point);
+
+  CHECK(FastFixedDtoa(0.0000000001000006, 15, buffer, &length, &point));
+  CHECK_EQ("100001", buffer.start());
+  CHECK_EQ(-9, point);
+
+  CHECK(FastFixedDtoa(0.0000000000100006, 15, buffer, &length, &point));
+  CHECK_EQ("10001", buffer.start());
+  CHECK_EQ(-10, point);
+
+  CHECK(FastFixedDtoa(0.0000000000010006, 15, buffer, &length, &point));
+  CHECK_EQ("1001", buffer.start());
+  CHECK_EQ(-11, point);
+
+  CHECK(FastFixedDtoa(0.0000000000001006, 15, buffer, &length, &point));
+  CHECK_EQ("101", buffer.start());
+  CHECK_EQ(-12, point);
+
+  CHECK(FastFixedDtoa(0.0000000000000106, 15, buffer, &length, &point));
+  CHECK_EQ("11", buffer.start());
+  CHECK_EQ(-13, point);
+
+  CHECK(FastFixedDtoa(0.000000000000001000006, 20, buffer, &length, &point));
+  CHECK_EQ("100001", buffer.start());
+  CHECK_EQ(-14, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000100006, 20, buffer, &length, &point));
+  CHECK_EQ("10001", buffer.start());
+  CHECK_EQ(-15, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000010006, 20, buffer, &length, &point));
+  CHECK_EQ("1001", buffer.start());
+  CHECK_EQ(-16, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000001006, 20, buffer, &length, &point));
+  CHECK_EQ("101", buffer.start());
+  CHECK_EQ(-17, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000000106, 20, buffer, &length, &point));
+  CHECK_EQ("11", buffer.start());
+  CHECK_EQ(-18, point);
+
+  CHECK(FastFixedDtoa(0.000000000000000000016, 20, buffer, &length, &point));
+  CHECK_EQ("2", buffer.start());
+  CHECK_EQ(-19, point);
+
+  CHECK(FastFixedDtoa(0.6, 0, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.96, 1, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.996, 2, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.9996, 3, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.99996, 4, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.999996, 5, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.9999996, 6, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.99999996, 7, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.999999996, 8, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.9999999996, 9, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.99999999996, 10, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.999999999996, 11, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.9999999999996, 12, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.99999999999996, 13, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.999999999999996, 14, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.9999999999999996, 15, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(0.00999999999999996, 16, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-1, point);
+
+  CHECK(FastFixedDtoa(0.000999999999999996, 17, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-2, point);
+
+  CHECK(FastFixedDtoa(0.0000999999999999996, 18, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-3, point);
+
+  CHECK(FastFixedDtoa(0.00000999999999999996, 19, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-4, point);
+
+  CHECK(FastFixedDtoa(0.000000999999999999996, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-5, point);
+
+  CHECK(FastFixedDtoa(323423.234234, 10, buffer, &length, &point));
+  CHECK_EQ("323423234234", buffer.start());
+  CHECK_EQ(6, point);
+
+  CHECK(FastFixedDtoa(12345678.901234, 4, buffer, &length, &point));
+  CHECK_EQ("123456789012", buffer.start());
+  CHECK_EQ(8, point);
+
+  CHECK(FastFixedDtoa(98765.432109, 5, buffer, &length, &point));
+  CHECK_EQ("9876543211", buffer.start());
+  CHECK_EQ(5, point);
+
+  CHECK(FastFixedDtoa(42, 20, buffer, &length, &point));
+  CHECK_EQ("42", buffer.start());
+  CHECK_EQ(2, point);
+
+  CHECK(FastFixedDtoa(0.5, 0, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(1, point);
+
+  CHECK(FastFixedDtoa(1e-23, 10, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-10, point);
+
+  CHECK(FastFixedDtoa(1e-123, 2, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-2, point);
+
+  CHECK(FastFixedDtoa(1e-123, 0, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(0, point);
+
+  CHECK(FastFixedDtoa(1e-23, 20, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-20, point);
+
+  CHECK(FastFixedDtoa(1e-21, 20, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-20, point);
+
+  CHECK(FastFixedDtoa(1e-22, 20, buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-20, point);
+
+  CHECK(FastFixedDtoa(6e-21, 20, buffer, &length, &point));
+  CHECK_EQ("1", buffer.start());
+  CHECK_EQ(-19, point);
+
+  CHECK(FastFixedDtoa(9.1193616301674545152000000e+19, 0,
+                      buffer, &length, &point));
+  CHECK_EQ("91193616301674545152", buffer.start());
+  CHECK_EQ(20, point);
+
+  CHECK(FastFixedDtoa(4.8184662102767651659096515e-04, 19,
+                      buffer, &length, &point));
+  CHECK_EQ("4818466210276765", buffer.start());
+  CHECK_EQ(-3, point);
+
+  CHECK(FastFixedDtoa(1.9023164229540652612705182e-23, 8,
+                      buffer, &length, &point));
+  CHECK_EQ("", buffer.start());
+  CHECK_EQ(-8, point);
+
+  CHECK(FastFixedDtoa(1000000000000000128.0, 0,
+                      buffer, &length, &point));
+  CHECK_EQ("1000000000000000128", buffer.start());
+  CHECK_EQ(19, point);
+}
+
+
+TEST(FastFixedDtoaGayFixed) {
+  char buffer_container[kBufferSize];
+  Vector<char> buffer(buffer_container, kBufferSize);
+  bool status;
+  int length;
+  int point;
+
+  Vector<const PrecomputedFixed> precomputed =
+      PrecomputedFixedRepresentations();
+  for (int i = 0; i < precomputed.length(); ++i) {
+    const PrecomputedFixed current_test = precomputed[i];
+    double v = current_test.v;
+    int number_digits = current_test.number_digits;
+    status = FastFixedDtoa(v, number_digits,
+                           buffer, &length, &point);
+    CHECK(status);
+    CHECK_EQ(current_test.decimal_point, point);
+    CHECK_GE(number_digits, length - point);
+    CHECK_EQ(current_test.representation, buffer.start());
+  }
+}