Converts a #gdouble to a string, using the ‘.’ as decimal point.
This function generates enough precision that converting
the string back using
g_ascii_strtod() gives the same machine-number
(on machines with IEEE compatible 64bit doubles). It is
guaranteed that the size of the resulting string will never
be larger than
G_ASCII_DTOSTR_BUF_SIZE bytes, including the terminating
nul character, which is always added.
A buffer to place the resulting string in.
The data is owned by the caller of the function. The value is a NUL terminated UTF-8 string.
The length of the buffer.
The #gdouble to convert.