1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * (C) Copyright 2003 3*4882a593Smuzhiyun * Gerry Hamel, geh@ti.com, Texas Instruments 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __CIRCBUF_H__ 9*4882a593Smuzhiyun #define __CIRCBUF_H__ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun typedef struct circbuf { 12*4882a593Smuzhiyun unsigned int size; /* current number of bytes held */ 13*4882a593Smuzhiyun unsigned int totalsize; /* number of bytes allocated */ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun char *top; /* pointer to current buffer start */ 16*4882a593Smuzhiyun char *tail; /* pointer to space for next element */ 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun char *data; /* all data */ 19*4882a593Smuzhiyun char *end; /* end of data buffer */ 20*4882a593Smuzhiyun } circbuf_t; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun int buf_init (circbuf_t * buf, unsigned int size); 23*4882a593Smuzhiyun int buf_free (circbuf_t * buf); 24*4882a593Smuzhiyun int buf_pop (circbuf_t * buf, char *dest, unsigned int len); 25*4882a593Smuzhiyun int buf_push (circbuf_t * buf, const char *src, unsigned int len); 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun #endif 28