The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2007-2008 The Android Open Source Project |
| 2 | ** |
| 3 | ** This software is licensed under the terms of the GNU General Public |
| 4 | ** License version 2, as published by the Free Software Foundation, and |
| 5 | ** may be copied, distributed, and modified under those terms. |
| 6 | ** |
| 7 | ** This program is distributed in the hope that it will be useful, |
| 8 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | ** GNU General Public License for more details. |
| 11 | */ |
| 12 | #ifndef _qemu_cbuffer_h |
| 13 | #define _qemu_cbuffer_h |
| 14 | |
| 15 | #include <stdint.h> |
| 16 | |
| 17 | /* Basic circular buffer type and methods */ |
| 18 | |
| 19 | typedef struct { |
| 20 | uint8_t* buff; |
| 21 | int size; |
| 22 | int rpos; |
| 23 | int count; |
| 24 | } CBuffer; |
| 25 | |
| 26 | static __inline__ void |
| 27 | cbuffer_reset( CBuffer* cb, void* buff, int size ) |
| 28 | { |
| 29 | cb->buff = buff; |
| 30 | cb->size = size; |
| 31 | cb->rpos = 0; |
| 32 | cb->count = 0; |
| 33 | } |
| 34 | |
| 35 | static __inline__ int |
| 36 | cbuffer_write_avail( CBuffer* cb ) |
| 37 | { |
| 38 | return cb->size - cb->count; |
| 39 | } |
| 40 | |
| 41 | extern int cbuffer_write( CBuffer* cb, const void* from, int len ); |
| 42 | extern int cbuffer_write_peek( CBuffer* cb, uint8_t* *pbase ); |
| 43 | extern void cbuffer_write_step( CBuffer* cb, int len ); |
| 44 | |
| 45 | static __inline__ int |
| 46 | cbuffer_read_avail( CBuffer* cb ) |
| 47 | { |
| 48 | return cb->count; |
| 49 | } |
| 50 | |
| 51 | extern int cbuffer_read( CBuffer* cb, void* to, int len ); |
| 52 | extern int cbuffer_read_peek( CBuffer* cb, uint8_t* *pbase ); |
| 53 | extern void cbuffer_read_step( CBuffer* cb, int len ); |
| 54 | |
| 55 | extern const char* cbuffer_quote( CBuffer* cb ); |
| 56 | extern const char* cbuffer_quote_data( CBuffer* cb ); |
| 57 | extern void cbuffer_print( CBuffer* cb ); |
| 58 | |
| 59 | #endif /* qemu_cbuffer_h */ |
| 60 | |
| 61 | |