1 /* 2 * Dropbear SSH 3 * 4 * Copyright (c) 2002-2004 Matt Johnston 5 * All rights reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. */ 24 25 #ifndef _CIRCBUFFER_H_ 26 #define _CIRCBUFFER_H_ 27 struct circbuf { 28 29 unsigned int size; 30 unsigned int readpos; 31 unsigned int writepos; 32 unsigned int used; 33 unsigned char* data; 34 }; 35 36 typedef struct circbuf circbuffer; 37 38 circbuffer * cbuf_new(unsigned int size); 39 void cbuf_free(circbuffer * cbuf); 40 41 unsigned int cbuf_getused(circbuffer * cbuf); /* how much data stored */ 42 unsigned int cbuf_getavail(circbuffer * cbuf); /* how much we can write */ 43 unsigned int cbuf_readlen(circbuffer *cbuf); /* max linear read len */ 44 unsigned int cbuf_writelen(circbuffer *cbuf); /* max linear write len */ 45 46 unsigned char* cbuf_readptr(circbuffer *cbuf, unsigned int len); 47 unsigned char* cbuf_writeptr(circbuffer *cbuf, unsigned int len); 48 void cbuf_incrwrite(circbuffer *cbuf, unsigned int len); 49 void cbuf_incrread(circbuffer *cbuf, unsigned int len); 50 #endif 51
