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51 lines
2.0 KiB
C
51 lines
2.0 KiB
C
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/*
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* Dropbear SSH
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*
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* Copyright (c) 2002-2004 Matt Johnston
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE. */
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#ifndef _CIRCBUFFER_H_
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#define _CIRCBUFFER_H_
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struct circbuf {
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unsigned int size;
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unsigned int readpos;
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unsigned int writepos;
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unsigned int used;
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unsigned char* data;
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};
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typedef struct circbuf circbuffer;
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circbuffer * cbuf_new(unsigned int size);
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void cbuf_free(circbuffer * cbuf);
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unsigned int cbuf_getused(circbuffer * cbuf); /* how much data stored */
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unsigned int cbuf_getavail(circbuffer * cbuf); /* how much we can write */
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unsigned int cbuf_readlen(circbuffer *cbuf); /* max linear read len */
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unsigned int cbuf_writelen(circbuffer *cbuf); /* max linear write len */
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unsigned char* cbuf_readptr(circbuffer *cbuf, unsigned int len);
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unsigned char* cbuf_writeptr(circbuffer *cbuf, unsigned int len);
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void cbuf_incrwrite(circbuffer *cbuf, unsigned int len);
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void cbuf_incrread(circbuffer *cbuf, unsigned int len);
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#endif
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