~jkaivo/binary

ref: 52b735b260281e9d907227a138d6aa57484018e0 binary/binary.c -rw-r--r-- 1.4 KiB
52b735b2 — Jakob Kaivo add include guards 3 years ago
                                                                                
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/*
 * MIT License
 *
 * Copyright (c) 2019 Jakob Kaivo <jakob@kaivo.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <stdint.h>
#include <string.h>

#include "binary.h"

char *binstr(size_t n, char s[n], uintmax_t b)
{
	memset(s, '0', n);
	s[n - 1] = '\0';
	for (size_t i = 0; i < n - 2 && i < BIN_UINTMAXBITS; i++) {
		if (b & ((uintmax_t)1 << i)) {
			s[n - (i + 2)] = '1';
		}
	}
	return s;
}