rtl-obj-comp.h

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/*
 *  COPYRIGHT (c) 2012 Chris Johns <chrisj@rtems.org>
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */
#if !defined (_RTEMS_RTL_OBJ_COMP_H_)
#define _RTEMS_RTL_OBJ_COMP_H_

#include <rtems/rtl/rtl-obj-cache.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define RTEMS_RTL_DECOMP_INPUT_SIZE (256)

#define RTEMS_RTL_COMP_NONE (0)
#define RTEMS_RTL_COMP_LZ77 (1)

typedef struct rtems_rtl_obj_cpmp_s
{
  rtems_rtl_obj_cache_t* cache;       
  int                    fd;          
  int                    compression; 
  off_t                  offset;      
  size_t                 size;        
  size_t                 level;       
  uint8_t*               buffer;      
  uint32_t               read;        
} rtems_rtl_obj_comp_t;

static inline uint32_t rtems_rtl_obj_comp_input (rtems_rtl_obj_comp_t* comp)
{
  return comp->read;
}

bool rtems_rtl_obj_comp_open (rtems_rtl_obj_comp_t*  comp,
                              size_t                 size);

void rtems_rtl_obj_comp_close (rtems_rtl_obj_comp_t* comp);

void rtems_rtl_obj_comp_set (rtems_rtl_obj_comp_t*  comp,
                             rtems_rtl_obj_cache_t* cache,
                             int                    fd,
                             int                    compression,
                             off_t                  offset);

bool rtems_rtl_obj_comp_read (rtems_rtl_obj_comp_t* comp,
                              void*                 buffer,
                              size_t                length);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif