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path: root/strings/apr_strings.c
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/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * 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. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#include "apr.h"
#include "apr_strings.h"
#include "apr_private.h"
#include "apr_lib.h"
#ifdef HAVE_STDDEF_H
#include <stddef.h> /* NULL */
#endif

APR_DECLARE(char *) apr_pstrdup(apr_pool_t *a, const char *s)
{
    char *res;
    size_t len;

    if (s == NULL) {
        return NULL;
    }
    len = strlen(s) + 1;
    res = apr_palloc(a, len);
    memcpy(res, s, len);
    return res;
}

APR_DECLARE(char *) apr_pstrndup(apr_pool_t *a, const char *s, apr_size_t n)
{
    char *res;

    if (s == NULL) {
        return NULL;
    }
    res = apr_palloc(a, n + 1);
    memcpy(res, s, n);
    res[n] = '\0';
    return res;
}

APR_DECLARE_NONSTD(char *) apr_pstrcat(apr_pool_t *a, ...)
{
    char *cp, *argp, *res;

    /* Pass one --- find length of required string */

    apr_size_t len = 0;
    va_list adummy;

    va_start(adummy, a);

    while ((cp = va_arg(adummy, char *)) != NULL) {
        len += strlen(cp);
    }

    va_end(adummy);

    /* Allocate the required string */

    res = (char *) apr_palloc(a, len + 1);
    cp = res;
    *cp = '\0';

    /* Pass two --- copy the argument strings into the result space */

    va_start(adummy, a);

    while ((argp = va_arg(adummy, char *)) != NULL) {
        strcpy(cp, argp);
        cp += strlen(argp);
    }

    va_end(adummy);

    /* Return the result string */

    return res;
}