set_data.c

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/**
 * \file
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2012  Georg Hopp
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <string.h>
#include <errno.h>

#include "cbuf.h"

char *
cbufSetData(Cbuf this, const void * src, size_t n)
{
    char * addr;

    if (n > cbufGetFree(this)) {
        errno = ECBUFOVFL;
        return (char *)-1;
    }

    addr = memcpy(cbufGetWrite(this), src, n);
    cbufIncWrite(this, n);

    return addr;
}

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