dconv::grisu3 Namespace Reference

Functions
bool	roundWeed (char *buffer, int length, uint64_t wpW, uint64_t delta, uint64_t rest, uint64_t tenKappa, uint64_t ulp) noexcept
	round the last digit to the closest value and check it is safe.
bool	digitsGen (const DiyFp &low, const DiyFp &w, const DiyFp &high, char *buffer, int &length, int &k) noexcept
	generate the shortest digits within the liberal boundaries.
void	fallback (char *buffer, int &length, int &k, double value) noexcept
	write the shortest and closest decimal digits using the standard library.
void	generate (char *buffer, int &length, int &k, double value) noexcept
	write the shortest and closest decimal digits.
char *	dtoa (char *buffer, double value) noexcept
	double to string conversion using Grisu3.

Function Documentation

digitsGen()

bool dconv::grisu3::digitsGen ( const DiyFp & low, const DiyFp & w, const DiyFp & high, char * buffer, int & length, int & k )

inlinenoexcept

generate the shortest digits within the liberal boundaries.

Parameters

low	lower boundary.
w	value.
high	upper boundary.
buffer	buffer to write the digits to.
length	number of digits written.
k	decimal exponent.

Returns

true if the digits are the shortest and closest, false otherwise.

dtoa()

char * dconv::grisu3::dtoa ( char * buffer, double value )

inlinenoexcept

double to string conversion using Grisu3.

Parameters

buffer	buffer to write the string representation to (must point to at least 25 writable bytes).
value	value to convert.

Returns

end position.

fallback()

void dconv::grisu3::fallback ( char * buffer, int & length, int & k, double value )

inlinenoexcept

write the shortest and closest decimal digits using the standard library.

Parameters

buffer	buffer to write the digits to.
length	number of digits written.
k	decimal exponent.
value	positive value to convert.

generate()

void dconv::grisu3::generate ( char * buffer, int & length, int & k, double value )

inlinenoexcept

write the shortest and closest decimal digits.

Parameters

buffer	buffer to write the digits to.
length	number of digits written.
k	decimal exponent.
value	positive value to convert.

roundWeed()

bool dconv::grisu3::roundWeed ( char * buffer, int length, uint64_t wpW, uint64_t delta, uint64_t rest, uint64_t tenKappa, uint64_t ulp )

inlinenoexcept

round the last digit to the closest value and check it is safe.

Parameters

buffer	generated digits.
length	number of generated digits.
wpW	distance between the liberal upper boundary and the value.
delta	liberal interval size.
rest	distance between the liberal upper boundary and the generated number.
tenKappa	scaled power of ten of the last digit.
ulp	scaled unit of the approximation error.

Returns

true if the generated number is the shortest and closest, false otherwise.