/*

 * Copyright (c) 2005 Kungliga Tekniska Högskolan

 * (Royal Institute of Technology, Stockholm, Sweden).

 * 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE OR 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.

 */

#include <config.h>

#include <stdarg.h>

#include <stdlib.h>

#include "roken.h"

struct rk_strpool {

    char *str;

    size_t len; /* strlen() of str */

    size_t sz;  /* Allocated size */

};

/*

 *

 */

ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL

rk_strpoolfree(struct rk_strpool *p)

{

    if (p && p->str) {

  free(p->str);

  p->str = NULL;

    }

    free(p);

}

/*

 *

 */

ROKEN_LIB_FUNCTION struct rk_strpool * ROKEN_LIB_CALL

rk_strpoolprintf(struct rk_strpool *p, const char *fmt, ...)

{

    va_list ap;

    char *str;

    int len;

    va_start(ap, fmt);

    len = vasprintf(&str, fmt, ap);

    va_end(ap);

    if (str == NULL)

  return rk_strpoolfree(p), NULL;

    if (p == NULL) {

  if ((p = malloc(sizeof(*p))) == NULL)

            return free(str), NULL;

  p->str = str;

  p->len = p->sz = len;

        return p;

    } /* else grow the buffer and append `str', but don't grow too fast */

    if (len + p->len + 1 > p->sz) {

        size_t sz = p->len + len + 9 + (p->sz >> 2);

        char *str2;

        if ((str2 = realloc(p->str, sz)) == NULL)

            return rk_strpoolfree(p), NULL;

        p->str = str2;

        p->sz = sz;

    }

    memcpy(p->str + p->len, str, len + 1);

    p->len += len;

    free(str);

    return p;

}

/*

 *

 */

ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL

rk_strpoolcollect(struct rk_strpool *p)

{

    char *str;

    if (p == NULL)

  return strdup("");

    str = p->str;

    p->str = NULL;

    free(p);

    return str;

}