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 | * | |
| 37839358 A |
6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| 0b4e3aa0 | 11 | * |
| 37839358 A |
12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 0b4e3aa0 A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 37839358 A |
16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 0b4e3aa0 A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | ||
| 23 | /* | |
| 24 | File: comp.h | |
| 25 | ||
| 26 | Contains: Glue between core prng code to the Zlib library. | |
| 27 | ||
| 28 | Written by: Counterpane, Inc. | |
| 29 | ||
| 30 | Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved. | |
| 31 | ||
| 32 | Change History (most recent first): | |
| 33 | ||
| 34 | 02/10/99 dpm Created, based on Counterpane source. | |
| 35 | ||
| 36 | */ | |
| 37 | /* comp.h | |
| 38 | ||
| 39 | Header for the compression routines added to the Counterpane PRNG. | |
| 40 | */ | |
| 41 | ||
| 42 | #ifndef __YARROW_COMP_H__ | |
| 43 | #define __YARROW_COMP_H__ | |
| 44 | ||
| 45 | #include "smf.h" | |
| 46 | ||
| 47 | /* | |
| 48 | * Kernel version does NULL compression.... | |
| 49 | */ | |
| 50 | #define YARROW_KERNEL | |
| 51 | ||
| 52 | #ifdef YARROW_KERNEL | |
| 53 | /* | |
| 54 | * Shrink this down to almost nothing to simplify kernel port; | |
| 55 | * with additional hacking on prng.c, this could go away entirely | |
| 56 | */ | |
| 57 | typedef char COMP_CTX; | |
| 58 | ||
| 59 | /* and define some type3s normally picked up from zlib */ | |
| 60 | typedef unsigned char Bytef; | |
| 61 | typedef unsigned uInt; | |
| 62 | ||
| 63 | #else | |
| 64 | ||
| 65 | #include "zlib.h" | |
| 66 | ||
| 67 | /* Top level compression context */ | |
| 68 | typedef struct{ | |
| 69 | MMPTR buf; | |
| 70 | uInt spaceused; | |
| 71 | } COMP_CTX; | |
| 72 | #endif /* YARROW_KERNEL */ | |
| 73 | ||
| 74 | typedef enum comp_error_status { | |
| 75 | COMP_SUCCESS = 0, | |
| 76 | COMP_ERR_NULL_POINTER, | |
| 77 | COMP_ERR_LOW_MEMORY, | |
| 78 | COMP_ERR_LIB | |
| 79 | } comp_error_status; | |
| 80 | ||
| 81 | /* Exported functions from compress.c */ | |
| 82 | comp_error_status comp_init(COMP_CTX* ctx); | |
| 83 | comp_error_status comp_add_data(COMP_CTX* ctx,Bytef* inp,uInt inplen); | |
| 84 | comp_error_status comp_end(COMP_CTX* ctx); | |
| 85 | comp_error_status comp_get_ratio(COMP_CTX* ctx,float* out); | |
| 86 | ||
| 87 | #endif |