include/circbuf.h

   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