include/circbuf.h

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