Calling DoubleToStringConverter::ToShortest with the value 1.80113 generates the string 1.8011300000000001

[troelstm]

The produced output 1.8011300000000001 is at least not what I would expect from ToShortest.

This code path doesn't generate a fallback to bignum calculations. I can't fully deduce from the comments whether this is intentionally.

But the net outcome is that this makes ToShortest a no go for our usage.

We have implemented an overlay of ToShortest that takes an additional max_digits input that we can use to solve the problem, but I'm wondering whether there is a better / more general solution.

[floitsch]

I just tried to reproduce, but was unsuccessful.
Could you provide more information on how you get this result.

The following worked in the test-program:

  const int kBufferSize = 128;
  char buffer[kBufferSize];
  StringBuilder builder(buffer, kBufferSize);
  int flags = DoubleToStringConverter::UNIQUE_ZERO |
      DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN;
  DoubleToStringConverter dc(flags, NULL, NULL, 'e', -6, 21, 0, 0);

  CHECK(dc.ToShortest(1.80113, &builder));
  CHECK_EQ("1.80113", builder.Finalize());

[Rayanysilva]

[Rayanysilva]

Para de mandar mensagem para minha esposa