xstring.c

/************************************************************************* 
 * Copyright (C) 2017-2019 Barcelona Supercomputing Center               *
 *                         Centro Nacional de Supercomputacion           *
 * All rights reserved.                                                  *
 *                                                                       *
 * This file is part of NORNS, a service that allows other programs to   *
 * start, track and manage asynchronous transfers of data resources      *
 * between different storage backends.                                   *
 *                                                                       *
 * See AUTHORS file in the top level directory for information regarding *
 * developers and contributors.                                          *
 *                                                                       *
 * This software was developed as part of the EC H2020 funded project    *
 * NEXTGenIO (Project ID: 671951).                                       *
 *     www.nextgenio.eu                                                  *
 *                                                                       *
 * 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 <unistd.h>
#include <string.h>
#include "xmalloc.h"
#include "xstring.h"


char*
xstrdup(const char* str) {

    size_t sz;
    char* res;

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

    sz = XMIN(strlen(str) + 1, XMAX_STRING_LENGTH);
    res = (char*) xmalloc(sz);
    strncpy(res, str, sz);
    res[sz-1] = '\0';

    return res;
}

int
xstrcnmp(const char* s1, const char* s2) {

    if(s1 == NULL && s2 == NULL) {
        return 0;
    }
    else if(s1 == NULL) {
        return -1;
    }
    else if(s2 == NULL) {
        return 1;
    }
    else {
        size_t sz;
        sz = XMIN(strlen(s1), strlen(s2));
        sz = XMIN(sz, XMAX_STRING_LENGTH);

        return strncmp(s1, s2, sz);
    }
    
}