/*

 * Copyright (C) 2007, 2012 Stefan Walter

 * Copyright (C) 2012 Red Hat Inc.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *     * Redistributions of source code must retain the above

 *       copyright notice, this list of conditions and the

 *       following disclaimer.

 *     * 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.

 *     * The names of contributors to this software may not be

 *       used to endorse or promote products derived from this

 *       software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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

 * COPYRIGHT OWNER 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.

 *

 * Author: Stef Walter <stef@thewalter.net>

 */

#ifndef P11_BUFFER_H_

#define P11_BUFFER_H_

#include "compat.h"

enum {

	P11_BUFFER_FAILED = 1 << 0,

	P11_BUFFER_NULL = 1 << 1,

};

typedef struct {

	void *data;

	size_t len;

	int flags;

	size_t size;

	void * (* frealloc) (void *, size_t);

	void (* ffree) (void *);

} p11_buffer;

bool             p11_buffer_init             (p11_buffer *buffer,

                                              size_t size);

bool             p11_buffer_init_null        (p11_buffer *buffer,

                                              size_t size);

void             p11_buffer_init_full        (p11_buffer *buffer,

                                              void *data,

                                              size_t len,

                                              int flags,

                                              void * (* frealloc) (void *, size_t),

                                              void (* ffree) (void *));

void             p11_buffer_uninit           (p11_buffer *buffer);

void *           p11_buffer_steal            (p11_buffer *buffer,

                                              size_t *length);

bool             p11_buffer_reset            (p11_buffer *buffer,

                                              size_t size);

void *           p11_buffer_append           (p11_buffer *buffer,

                                              size_t length);

void             p11_buffer_add              (p11_buffer *buffer,

                                              const void *data,

                                              ssize_t length);

#define          p11_buffer_fail(buf) \

	((buf)->flags |= P11_BUFFER_FAILED)

#define          p11_buffer_ok(buf) \

	(((buf)->flags & P11_BUFFER_FAILED) ? false : true)

#define          p11_buffer_failed(buf) \

	(((buf)->flags & P11_BUFFER_FAILED) ? true : false)

#endif /* BUFFER_H */