/*
**
**  OO_Copyright_BEGIN
**
**
**  Copyright 2010, 2018 IBM Corp. All rights reserved.
**
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**   modification, are permitted provided that the following conditions
**  are met:
**  1. Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**  2. Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in the
**  documentation and/or other materials provided with the distribution.
**  3. Neither the name of the copyright holder nor the names of its
**     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 HOLDER OR CONTRIBUTORS BE
**  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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**
*************************************************************************************
**
** COMPONENT NAME:  IBM Linear Tape File System
**
** FILE NAME:       arch/osx/osx_string.c
**
** DESCRIPTION:     Implements some string functions missing on OS X.
**
** AUTHOR:          Michael A. Richmond
**                  IBM Almaden Research Center
**                  mar@almaden.ibm.com
**
*************************************************************************************
*/

#ifdef __APPLE__

#include "osx_string.h"

size_t strnlen(const char *s, size_t maxlen) {
        const char *null_pos = memchr(s, '\0', maxlen);

        if (null_pos) {
                return null_pos - s;
        } else {
                return maxlen;
        }
}

char *strndup(const char *s, size_t maxlen) {

        size_t length = strnlen(s, maxlen);
        char *destination = malloc(length + 1);

        if(destination == NULL) {
                return NULL;
        }

        destination[length] = '\0';
        return memcpy(destination, s, length);
}

#endif /* __APPLE__ */
