/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Based on ringbuffer.h by Patrick Prasse (patrick.prasse@gmx.net). Code
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has been modified by Telenor and Gemalto.
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*/
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#ifndef __CP_RINGBUF_H_
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#define __CP_RINGBUF_H_
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#include <sys/types.h>
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struct ring_buffer {
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u_char *buffer;
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int wr_pointer;
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int rd_pointer;
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int size;
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};
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/* Initial the ring buffer */
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void rb_init (struct ring_buffer *ring, u_char* buff, int size) ;
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/* Description: Write $len bytes data in $buf into ring buffer $rb
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* Return Value: The actual written into ring buffer data size, if ring buffer
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* left space size small than $len, then only part of the data be written into.
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*/
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int rb_write (struct ring_buffer *rb, u_char * buf, int len) ;
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/* Get ring buffer left free size */
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int rb_free_size (struct ring_buffer *rb);
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/* Read $max bytes data from ring buffer $rb to $buf */
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int rb_read (struct ring_buffer *rb, u_char * buf, int max);
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/* Read a specify $index byte data in ring buffer $rb */
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u_char rb_peek(struct ring_buffer* rb, int index);
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/* Get data size in the ring buffer */
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int rb_data_size (struct ring_buffer *);
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/* Clear the ring buffer data */
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void rb_clear (struct ring_buffer *rb) ;
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#endif /* __CP_RINGBUF_H_ */
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