src/fast-dtoa.h

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#ifndef V8_FAST_DTOA_H_
#define V8_FAST_DTOA_H_

namespace v8 {
namespace internal {

// FastDtoa will produce at most kFastDtoaMaximalLength digits. This does not
// include the terminating '\0' character.
static const int kFastDtoaMaximalLength = 17;

// Provides a decimal representation of v.
// v must not be (positive or negative) zero and it must not be Infinity or NaN.
// Returns true if it succeeds, otherwise the result can not be trusted.
// There will be *length digits inside the buffer followed by a null terminator.
// If the function returns true then
//   v == (double) (buffer * 10^(point - length)).
// The digits in the buffer are the shortest representation possible: no
// 0.099999999999 instead of 0.1.
// The last digit will be closest to the actual v. That is, even if several
// digits might correctly yield 'v' when read again, the buffer will contain the
// one closest to v.
// The variable 'sign' will be '0' if the given number is positive, and '1'
//   otherwise.
bool FastDtoa(double d,
              Vector<char> buffer,
              int* sign,
              int* length,
              int* point);

} }  // namespace v8::internal

#endif  // V8_FAST_DTOA_H_