/*-
 * Copyright (c) 2011-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * 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 THE AUTHOR 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 AUTHOR 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.
 *
 */

#ifdef CACHE_VGZ_H_INCLUDED
#  error "Multiple includes of cache/cache_vgz.h"
#endif
#define CACHE_VGZ_H_INCLUDED

struct vgz;

enum vgzret_e {
	VGZ_ERROR = -1,
	VGZ_OK = 0,
	VGZ_END = 1,
	VGZ_STUCK = 2,
};

enum vgz_flag { VGZ_NORMAL, VGZ_ALIGN, VGZ_RESET, VGZ_FINISH };
// struct vgz *VGZ_NewUngzip(struct vsl_log *vsl, const char *id);
struct vgz *VGZ_NewGzip(struct vsl_log *vsl, const char *id);
void VGZ_Ibuf(struct vgz *, const void *, ssize_t len);
int VGZ_IbufEmpty(const struct vgz *vg);
void VGZ_Obuf(struct vgz *, void *, ssize_t len);
int VGZ_ObufFull(const struct vgz *vg);
enum vgzret_e VGZ_Gzip(struct vgz *, const void **, ssize_t *len,
    enum vgz_flag);
// enum vgzret_e VGZ_Gunzip(struct vgz *, const void **, ssize_t *len);
enum vgzret_e VGZ_Destroy(struct vgz **);

enum vgz_ua_e {
	VUA_UPDATE,		// Update start/stop/last bits if changed
	VUA_END_GZIP,		// Record uncompressed size
	VUA_END_GUNZIP,		// Record uncompressed size
};

void VGZ_UpdateObj(const struct vfp_ctx *, struct vgz*, enum vgz_ua_e);
