Provide (non Gay) dtoa for fixed notation.

src/dtoa.cc

+// 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 <math.h>
+
+#include "v8.h"
+#include "dtoa.h"
+
+#include "double.h"
+#include "fast-dtoa.h"
+#include "fixed-dtoa.h"
+
+namespace v8 {
+namespace internal {
+
+bool DoubleToAscii(double v, DtoaMode mode, int requested_digits,
+                   Vector<char> buffer, int* sign, int* length, int* point) {
+  ASSERT(!Double(v).IsSpecial());
+  ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0);
+
+  if (Double(v).Sign() < 0) {
+    *sign = 1;
+    v = -v;
+  } else {
+    *sign = 0;
+  }
+
+  if (v == 0) {
+    buffer[0] = '0';
+    buffer[1] = '\0';
+    *length = 1;
+    *point = 1;
+    return true;
+  }
+
+  if (mode == DTOA_PRECISION && requested_digits == 0) {
+    buffer[0] = '\0';
+    *length = 0;
+    return true;
+  }
+
+  switch (mode) {
+    case DTOA_SHORTEST:
+      return FastDtoa(v, buffer, length, point);
+    case DTOA_FIXED:
+      return FastFixedDtoa(v, requested_digits, buffer, length, point);
+    default:
+      break;
+  }
+  return false;
+}
+
+} }  // namespace v8::internal