From c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b Mon Sep 17 00:00:00 2001 From: David Robillard Date: Thu, 25 Feb 2021 10:27:59 -0500 Subject: Add exess from git@gitlab.com:drobilla/exess.git 4638b1f --- subprojects/exess/src/digits.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 subprojects/exess/src/digits.h (limited to 'subprojects/exess/src/digits.h') diff --git a/subprojects/exess/src/digits.h b/subprojects/exess/src/digits.h new file mode 100644 index 00000000..0753a0af --- /dev/null +++ b/subprojects/exess/src/digits.h @@ -0,0 +1,38 @@ +/* + Copyright 2019-2021 David Robillard + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +#ifndef EXESS_DIGITS_H +#define EXESS_DIGITS_H + +typedef struct { + unsigned count; ///< Number of digits + int expt; ///< Power of 10 exponent +} ExessDigitCount; + +/** + Write significant digits 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. + + @param d The number to convert to digits, 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. +*/ +ExessDigitCount +exess_digits(double d, char* buf, unsigned max_digits); + +#endif // EXESS_DIGITS_H -- cgit v1.2.1