Mercurial > dropbear

comparison circbuffer.h @ 108:10f4d3319780

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- added circular buffering for channels - added stderr support for the client - cleaned up a bunch of "unused" warnings, duplicated header definitions - added exit-status support for the client
author Matt Johnston <matt@ucc.asn.au>
date Thu, 26 Aug 2004 13:16:40 +0000
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children deed0571cacc
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107:d3eb1fa8484e 108:10f4d3319780
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