dconv::grisu2 Namespace Reference

Functions
void	scaledBoundaries (double value, DiyFp &w, DiyFp &minus, DiyFp &plus, int &k) noexcept
	compute the scaled value and its scaled boundaries.
void	round (char *buffer, int length, uint64_t delta, uint64_t rest, uint64_t tenKappa, uint64_t wpW) noexcept
	move the last digit closer to the value while it stays within the boundaries.
void	digitsGen (const DiyFp &w, const DiyFp &high, uint64_t delta, char *buffer, int &length, int &k) noexcept
	generate the shortest digits within the conservative boundaries.
void	generate (char *buffer, int &length, int &k, double value) noexcept
	write the shortest decimal digits within the conservative boundaries.
char *	dtoa (char *buffer, double value) noexcept
	double to string conversion using Grisu2.

Function Documentation

digitsGen()

void dconv::grisu2::digitsGen ( const DiyFp & w, const DiyFp & high, uint64_t delta, char * buffer, int & length, int & k )

inlinenoexcept

generate the shortest digits within the conservative boundaries.

Parameters

w	scaled value.
high	conservative upper boundary.
delta	distance between the conservative boundaries.
buffer	buffer to write the digits to.
length	number of digits written.
k	decimal exponent.

dtoa()

char * dconv::grisu2::dtoa ( char * buffer, double value )

inlinenoexcept

double to string conversion using Grisu2.

Parameters

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

Returns

end position.

generate()

void dconv::grisu2::generate ( char * buffer, int & length, int & k, double value )

inlinenoexcept

write the shortest decimal digits within the conservative boundaries.

Parameters

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

round()

void dconv::grisu2::round ( char * buffer, int length, uint64_t delta, uint64_t rest, uint64_t tenKappa, uint64_t wpW )

inlinenoexcept

move the last digit closer to the value while it stays within the boundaries.

Parameters

buffer	generated digits.
length	number of generated digits.
delta	distance between the boundaries.
rest	distance between the upper boundary and the generated number.
tenKappa	scaled power of ten of the last digit.
wpW	distance between the upper boundary and the value.

scaledBoundaries()

void dconv::grisu2::scaledBoundaries ( double value, DiyFp & w, DiyFp & minus, DiyFp & plus, int & k )

inlinenoexcept

compute the scaled value and its scaled boundaries.

Parameters

value	positive value to convert.
w	scaled value.
minus	scaled lower boundary.
plus	scaled upper boundary.
k	decimal exponent of the scaled values.