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232c150a25
add support for USB-based console (enable with "setenv stdout usbtty; setenv stdin usbtty")
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/*
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* (C) Copyright 2003
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* Gerry Hamel, geh@ti.com, Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __CIRCBUF_H__
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#define __CIRCBUF_H__
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typedef struct circbuf {
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unsigned int size; /* current number of bytes held */
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unsigned int totalsize; /* number of bytes allocated */
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char *top; /* pointer to current buffer start */
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char *tail; /* pointer to space for next element */
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char *data; /* all data */
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char *end; /* end of data buffer */
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} circbuf_t;
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int buf_init (circbuf_t * buf, unsigned int size);
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int buf_free (circbuf_t * buf);
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int buf_pop (circbuf_t * buf, char *dest, unsigned int len);
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int buf_push (circbuf_t * buf, const char *src, unsigned int len);
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#endif
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