bsd/dev/random/YarrowCoreLib/src/comp.h

   1 /*
   2  * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27         File:           comp.h
  28
  29         Contains:       Glue between core prng code to the Zlib library.
  30
  31         Written by:     Counterpane, Inc.
  32
  33         Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
  34
  35         Change History (most recent first):
  36
  37                 02/10/99        dpm             Created, based on Counterpane source.
  38
  39 */
  40 /* comp.h
  41
  42    Header for the compression routines added to the Counterpane PRNG.
  43 */
  44
  45 #ifndef __YARROW_COMP_H__
  46 #define __YARROW_COMP_H__
  47
  48 #include "smf.h"
  49
  50 /*
  51  * Kernel version does NULL compression....
  52  */
  53 #define YARROW_KERNEL
  54
  55 #ifdef  YARROW_KERNEL
  56 /*
  57  * Shrink this down to almost nothing to simplify kernel port;
  58  * with additional hacking on prng.c, this could go away entirely
  59  */
  60 typedef char COMP_CTX;
  61
  62 /* and define some type3s normally picked up from zlib */
  63 typedef unsigned char Bytef;
  64 typedef unsigned uInt;
  65
  66 #else
  67
  68 #include "zlib.h"
  69
  70 /* Top level compression context */
  71 typedef struct{
  72         MMPTR buf;
  73         uInt spaceused;
  74 } COMP_CTX;
  75 #endif  /* YARROW_KERNEL */
  76
  77 typedef enum comp_error_status {
  78         COMP_SUCCESS = 0,
  79         COMP_ERR_NULL_POINTER,
  80         COMP_ERR_LOW_MEMORY,
  81         COMP_ERR_LIB
  82 } comp_error_status;
  83
  84 /* Exported functions from compress.c */
  85 comp_error_status comp_init(COMP_CTX* ctx);
  86 comp_error_status comp_add_data(COMP_CTX* ctx,Bytef* inp,uInt inplen);
  87 comp_error_status comp_end(COMP_CTX* ctx);
  88 comp_error_status comp_get_ratio(COMP_CTX* ctx,float* out);
  89
  90 #endif