include/circbuf.h

   1 /*
   2  * (C) Copyright 2003
   3  * Gerry Hamel, geh@ti.com, Texas Instruments
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __CIRCBUF_H__
   9 #define __CIRCBUF_H__
  10
  11 typedef struct circbuf {
  12         unsigned int size;      /* current number of bytes held */
  13         unsigned int totalsize; /* number of bytes allocated */
  14
  15         char *top;              /* pointer to current buffer start */
  16         char *tail;             /* pointer to space for next element */
  17
  18         char *data;             /* all data */
  19         char *end;              /* end of data buffer */
  20 } circbuf_t;
  21
  22 int buf_init (circbuf_t * buf, unsigned int size);
  23 int buf_free (circbuf_t * buf);
  24 int buf_pop (circbuf_t * buf, char *dest, unsigned int len);
  25 int buf_push (circbuf_t * buf, const char *src, unsigned int len);
  26
  27 #endif