adtools/clib2

/*
 * $Id: time_numbertostring.c,v 1.3 2006-01-08 12:04:27 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _TIME_HEADERS_H
#include "time_headers.h"
#endif /* _TIME_HEADERS_H */

/****************************************************************************/

char *
__number_to_string(
    unsigned int    number,
    char *            string,
    size_t            max_len,
    size_t            min_len)
{
    char * s = string;
    size_t len,i;
    char c;

    assert( string != NULL && max_len >= min_len );

    /* One off for the terminating NUL. */
    if(max_len > 0)
        max_len--;

    len = 0;

    /* Convert the number digit by digit, building the
     * string in reverse order.
     */
    do
    {
        if(max_len == 0)
            break;

        max_len--;

        (*s++) = '0' + (number % 10);
        number /= 10;

        len++;
    }
    while(number > 0);

    /* Pad the string to the requested length, if necessary. */
    while(max_len > 0 && len < min_len)
    {
        max_len--;

        (*s++) = '0';
        len++;
    }

    (*s) = '\0';

    /* Reverse the string in place. */
    for(i = 0 ; i < len / 2 ; i++)
    {
        c                = string[len-1-i];
        string[len-1-i]    = string[i];
        string[i]        = c;
    }

    return(string);
}