xstring.c

/* * Copyright (C) 2017 Barcelona Supercomputing Center
 *                    Centro Nacional de Supercomputacion
 *
 * This file is part of the Data Scheduler, a daemon for tracking and managing
 * requests for asynchronous data transfer in a hierarchical storage environment.
 *
 * See AUTHORS file in the top level directory for information
 * regarding developers and contributors.
 *
 * The Data Scheduler is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Data Scheduler is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Data Scheduler.  If not, see <http://www.gnu.org/licenses/>.
 */

#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] = '\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);
    }
    
}