projects / apple / xnu.git / blame
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|---|---|---|
| 0b4e3aa0 A |
1 | /* |
| 2 | * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 43866e37 | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| 0b4e3aa0 | 7 | * |
| 43866e37 A |
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 | |
| 0b4e3aa0 A |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 43866e37 A |
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. | |
| 0b4e3aa0 A |
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 |