/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

* 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.
* Neither the name of Nokia Corporation 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 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 HOLDER 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.
*
* Description:
*
*/


#ifndef HEADER_COMP_H
#define HEADER_COMP_H

#if (defined(__SYMBIAN32__) && !defined(SYMBIAN))
#define SYMBIAN
#endif

#ifdef SYMBIAN
#include <e32def.h>
#endif
#include <openssl/crypto.h>

#ifdef  __cplusplus
extern "C" {
#endif
#ifdef SYMBIAN
#include <e32def.h>
#endif
typedef struct comp_ctx_st COMP_CTX;

typedef struct comp_method_st
	{
	int type;		/* NID for compression library */
	const char *name;	/* A text string to identify the library */
	int (*init)(COMP_CTX *ctx);
	void (*finish)(COMP_CTX *ctx);
	int (*compress)(COMP_CTX *ctx,
			unsigned char *out, unsigned int olen,
			unsigned char *in, unsigned int ilen);
	int (*expand)(COMP_CTX *ctx,
		      unsigned char *out, unsigned int olen,
		      unsigned char *in, unsigned int ilen);
	/* The following two do NOTHING, but are kept for backward compatibility */
	long (*ctrl)(void);
	long (*callback_ctrl)(void);
	} COMP_METHOD;

struct comp_ctx_st
	{
	COMP_METHOD *meth;
	unsigned long compress_in;
	unsigned long compress_out;
	unsigned long expand_in;
	unsigned long expand_out;

	CRYPTO_EX_DATA	ex_data;
	};


IMPORT_C COMP_CTX *COMP_CTX_new(COMP_METHOD *meth);
IMPORT_C void COMP_CTX_free(COMP_CTX *ctx);
IMPORT_C int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
	unsigned char *in, int ilen);
IMPORT_C int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
	unsigned char *in, int ilen);
IMPORT_C COMP_METHOD *COMP_rle(void );
IMPORT_C COMP_METHOD *COMP_zlib(void );

/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
 * made after this point may be overwritten when the script is next run.
 */
IMPORT_C void ERR_load_COMP_strings(void);

/* Error codes for the COMP functions. */

/* Function codes. */

/* Reason codes. */

#ifdef  __cplusplus
}
#endif
#endif