1 /* 2 * (C) Copyright 2003 3 * Gerry Hamel, geh@ti.com, Texas Instruments 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 */ 20 21 #ifndef __CIRCBUF_H__ 22 #define __CIRCBUF_H__ 23 24 typedef struct circbuf { 25 unsigned int size; /* current number of bytes held */ 26 unsigned int totalsize; /* number of bytes allocated */ 27 28 char *top; /* pointer to current buffer start */ 29 char *tail; /* pointer to space for next element */ 30 31 char *data; /* all data */ 32 char *end; /* end of data buffer */ 33 } circbuf_t; 34 35 int buf_init (circbuf_t * buf, unsigned int size); 36 int buf_free (circbuf_t * buf); 37 int buf_pop (circbuf_t * buf, char *dest, unsigned int len); 38 int buf_push (circbuf_t * buf, const char *src, unsigned int len); 39 40 #endif 41