Add bignum fall-back when the fast dtoa doesn't succeed. This removes Gay's d...

src/dtoa.h

 // 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
@@ skipping 54 matching lines @@
 //   Halfway cases are rounded towards +/-Infinity (away from 0). The call
 //   toFixed(0.15, 2) thus returns buffer="2", point=0.
 //   The returned buffer may contain digits that would be truncated from the
 //   shortest representation of the input.
 //  - PRECISION: produces 'requested_digits' where the first digit is not '0'.
 //   Even though the length of produced digits usually equals
 //   'requested_digits', the function is allowed to return fewer digits, in
 //   which case the caller has to fill the missing digits with '0's.
 //   Halfway cases are again rounded away from 0.
 // 'DoubleToAscii' expects the given buffer to be big enough to hold all digits
-// and a terminating null-character.
-bool DoubleToAscii(double v, DtoaMode mode, int requested_digits,
+// and a terminating null-character. In SHORTEST-mode it expects a buffer of
+// at least kBase10MaximalLength + 1 and otherwise the requested_digits

[William Hesse, 2010/11/15 15:48:30]

+ 1.  Otherwise, the size of the output is limited to requested_digits digits
plus the null terminator.

[Florian Loitsch, 2010/11/16 14:32:06]

Done.

+// parameter (+ 1) limits the size of the output.
+void DoubleToAscii(double v, DtoaMode mode, int requested_digits,
                    Vector<char> buffer, int* sign, int* length, int* point);
 
 } }  // namespace v8::internal
 
 #endif  // V8_DTOA_H_