JSON-SIMD

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README  view on Meta::CPAN

           $x *= 1;     # same thing, the choice is yours.

        You can not currently force the type in other, less obscure, ways.
        Tell me if you need this capability (but don't forget to explain why
        it's needed :).

        Note that numerical precision has the same meaning as under Perl (so
        binary to decimal conversion follows the same rules as in Perl,
        which can differ to other languages). Also, your perl interpreter
        might expose extensions to the floating point numbers of your
        platform, such as infinities or NaN's - these cannot be represented
        in JSON, and it is an error to pass those in.

  OBJECT SERIALISATION
    As JSON cannot directly represent Perl objects, you have to choose
    between a pure JSON representation (without the ability to deserialise
    the object automatically again), and a nonstandard extension to the JSON
    syntax, tagged values.

   SERIALISATION
    What happens when "JSON::SIMD" encounters a Perl object depends on the

SIMD.pm  view on Meta::CPAN

   $x *= 1;     # same thing, the choice is yours.

You can not currently force the type in other, less obscure, ways. Tell me
if you need this capability (but don't forget to explain why it's needed
:).

Note that numerical precision has the same meaning as under Perl (so
binary to decimal conversion follows the same rules as in Perl, which
can differ to other languages). Also, your perl interpreter might expose
extensions to the floating point numbers of your platform, such as
infinities or NaN's - these cannot be represented in JSON, and it is an
error to pass those in.

=back

=head2 OBJECT SERIALISATION

As JSON cannot directly represent Perl objects, you have to choose between
a pure JSON representation (without the ability to deserialise the object
automatically again), and a nonstandard extension to the JSON syntax,
tagged values.

ppport.h  view on Meta::CPAN

    s++; if (s == send || (*s != 'F' && *s != 'f')) return 0;
    s++; if (s < send && (*s == 'I' || *s == 'i')) {
      s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
      s++; if (s == send || (*s != 'I' && *s != 'i')) return 0;
      s++; if (s == send || (*s != 'T' && *s != 't')) return 0;
      s++; if (s == send || (*s != 'Y' && *s != 'y')) return 0;
      s++;
    }
    sawinf = 1;
  } else if (*s == 'N' || *s == 'n') {
    /* XXX TODO: There are signaling NaNs and quiet NaNs. */
    s++; if (s == send || (*s != 'A' && *s != 'a')) return 0;
    s++; if (s == send || (*s != 'N' && *s != 'n')) return 0;
    s++;
    sawnan = 1;
  } else
    return 0;

  if (sawinf) {
    numtype &= IS_NUMBER_NEG; /* Keep track of sign  */
    numtype |= IS_NUMBER_INFINITY | IS_NUMBER_NOT_INT;

simdjson.cpp  view on Meta::CPAN

  *buf++ = 'e';
  return append_exponent(buf, n - 1);
}

} // namespace dtoa_impl

/*!
The format of the resulting decimal representation is similar to printf's %g
format. Returns an iterator pointing past-the-end of the decimal representation.
@note The input number must be finite, i.e. NaN's and Inf's are not supported.
@note The buffer must be large enough.
@note The result is NOT null-terminated.
*/
char *to_chars(char *first, const char *last, double value) {
  static_cast<void>(last); // maybe unused - fix warning
  bool negative = std::signbit(value);
  if (negative) {
    value = -value;
    *first++ = '-';
  }

simdjson.h  view on Meta::CPAN

          reinterpret_cast<const char *>(doc.string_buf.get() +
                                          (current_val & internal::JSON_VALUE_MASK)),
          sizeof(uint32_t));
      return answer;
  }

  // get the double value at this node; valid only if
  // get_type() is "d"
  inline double get_double() const {
      if (location + 1 >= tape_length) {
      return std::numeric_limits<double>::quiet_NaN(); // default value in
                                                      // case of error
      }
      double answer;
      std::memcpy(&answer, &doc.tape[location + 1], sizeof(answer));
      return answer;
  }

  inline bool is_object_or_array() const { return is_object() || is_array(); }

  inline bool is_object() const { return get_type() == '{'; }