LXR uboot/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
  24typedef 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
  35int buf_init (circbuf_t * buf, unsigned int size);
  36int buf_free (circbuf_t * buf);
  37int buf_pop (circbuf_t * buf, char *dest, unsigned int len);
  38int buf_push (circbuf_t * buf, const char *src, unsigned int len);
  39
  40#endif
  41