1 files changed, 106 insertions, 0 deletions
diff --git a/chromium/v8/src/dtoa.cc b/chromium/v8/src/dtoa.cc
new file mode 100644
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+++ b/chromium/v8/src/dtoa.cc
@@ -0,0 +1,106 @@
+// Copyright 2011 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 <cmath>
+
+#include "../include/v8stdint.h"
+#include "checks.h"
+#include "utils.h"
+
+#include "dtoa.h"
+
+#include "bignum-dtoa.h"
+#include "double.h"
+#include "fast-dtoa.h"
+#include "fixed-dtoa.h"
+
+namespace v8 {
+namespace internal {
+
+static BignumDtoaMode DtoaToBignumDtoaMode(DtoaMode dtoa_mode) {
+  switch (dtoa_mode) {
+    case DTOA_SHORTEST:  return BIGNUM_DTOA_SHORTEST;
+    case DTOA_FIXED:     return BIGNUM_DTOA_FIXED;
+    case DTOA_PRECISION: return BIGNUM_DTOA_PRECISION;
+    default:
+      UNREACHABLE();
+      return BIGNUM_DTOA_SHORTEST;  // To silence compiler.
+  }
+}
+
+
+void 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;
+  }
+
+  if (mode == DTOA_PRECISION && requested_digits == 0) {
+    buffer[0] = '\0';
+    *length = 0;
+    return;
+  }
+
+  bool fast_worked;
+  switch (mode) {
+    case DTOA_SHORTEST:
+      fast_worked = FastDtoa(v, FAST_DTOA_SHORTEST, 0, buffer, length, point);
+      break;
+    case DTOA_FIXED:
+      fast_worked = FastFixedDtoa(v, requested_digits, buffer, length, point);
+      break;
+    case DTOA_PRECISION:
+      fast_worked = FastDtoa(v, FAST_DTOA_PRECISION, requested_digits,
+                             buffer, length, point);
+      break;
+    default:
+      UNREACHABLE();
+      fast_worked = false;
+  }
+  if (fast_worked) return;
+
+  // If the fast dtoa didn't succeed use the slower bignum version.
+  BignumDtoaMode bignum_mode = DtoaToBignumDtoaMode(mode);
+  BignumDtoa(v, bignum_mode, requested_digits, buffer, length, point);
+  buffer[*length] = '\0';
+}
+
+} }  // namespace v8::internal