diff options
Diffstat (limited to 'src/decimal.h')
| -rw-r--r-- | src/decimal.h | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/src/decimal.h b/src/decimal.h index eefc07ef..8575cd85 100644 --- a/src/decimal.h +++ b/src/decimal.h @@ -19,14 +19,26 @@ #include <stdint.h> +typedef struct { + unsigned count; ///< Number of digits + int expt; ///< Power of 10 exponent +} SerdDecimalCount; + /// Return the number of decimal digits required to represent `n` int serd_count_digits(uint64_t i); -unsigned -serd_double_int_digits(double abs); +/** + Write significant decimal digits for `d` into `buf`. + + Writes only significant digits, without any leading or trailing zeros. The + actual number is given by the exponent in the return value. -unsigned -serd_decimals(double d, char* buf, unsigned frac_digits); + @param d The number to convert to decimal, must be finite and non-zero. + @param buf The output buffer at least `max_digits` long. + @param max_digits The maximum number of digits to write. +*/ +SerdDecimalCount +serd_decimals(double d, char* buf, unsigned max_digits); #endif // SERD_DECIMAL_H |