/* buffer.h -- Auto-growing string buffers
 *
 * Copyright (c) 2012 BalaBit IT Security Ltd.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY BALABIT 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 BALABIT 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.
 */

#ifndef UMBERLOG_BUFFER_H
#define UMBERLOG_BUFFER_H 1

#include <stdlib.h>

typedef struct
{
  char *msg;        /* Buffer start */
  char *ptr;        /* Place to append new data */
  char *alloc_end;  /* After last allocated byte */
} ul_buffer_t;

int ul_buffer_reset (ul_buffer_t *buffer)
  __attribute__((visibility("hidden")));
ul_buffer_t *ul_buffer_append (ul_buffer_t *buffer,
                               const char *key, const char *value)
  __attribute__((visibility("hidden")));
char *ul_buffer_finalize (ul_buffer_t *buffer)
  __attribute__((visibility("hidden")));

#endif