paulo@0: /*
paulo@0:  * $Id: io_buf.h,v 1.2 2003/09/17 17:44:11 hipnod Exp $
paulo@0:  *
paulo@0:  * Copyright (C) 2003 giFT project (gift.sourceforge.net)
paulo@0:  *
paulo@0:  * This program is free software; you can redistribute it and/or modify it
paulo@0:  * under the terms of the GNU General Public License as published by the
paulo@0:  * Free Software Foundation; either version 2, or (at your option) any
paulo@0:  * later version.
paulo@0:  *
paulo@0:  * This program is distributed in the hope that it will be useful, but
paulo@0:  * WITHOUT ANY WARRANTY; without even the implied warranty of
paulo@0:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
paulo@0:  * General Public License for more details.
paulo@0:  */
paulo@0: 
paulo@0: #ifndef GIFT_GT_IO_BUF_H_
paulo@0: #define GIFT_GT_IO_BUF_H_
paulo@0: 
paulo@0: /*****************************************************************************/
paulo@0: 
paulo@0: /*
paulo@0:  * This duplicates libgift's String somewhat...
paulo@0:  */
paulo@0: struct io_buf
paulo@0: {
paulo@0: 	uint8_t   *data;
paulo@0: 	size_t     size;
paulo@0: 	size_t     r_offs;
paulo@0: 	size_t     w_offs;
paulo@0: };
paulo@0: 
paulo@0: /*****************************************************************************/
paulo@0: 
paulo@0: /*
paulo@0:  * Macros for accessing particular things about an I/O buf...
paulo@0:  */
paulo@0: 
paulo@0: #define io_buf_read_avail(io_buf) \
paulo@0: 	((io_buf)->w_offs - (io_buf)->r_offs)
paulo@0: 
paulo@0: #define io_buf_len(io_buf) \
paulo@0: 	((io_buf)->w_offs)
paulo@0: 
paulo@0: #define io_buf_size(io_buf) \
paulo@0: 	((io_buf)->size)
paulo@0: 
paulo@0: #define io_buf_write_avail(io_buf) \
paulo@0: 	((io_buf)->size - (io_buf)->w_offs)
paulo@0: 
paulo@0: #define io_buf_write_ptr(io_buf) \
paulo@0:     (&(io_buf)->data[(io_buf)->w_offs])
paulo@0: 
paulo@0: #define io_buf_read_ptr(iobuf) \
paulo@0: 	(&(iobuf)->data[(iobuf)->r_offs])
paulo@0: 
paulo@0: /*****************************************************************************/
paulo@0: 
paulo@0: struct io_buf  *io_buf_new        (size_t len);
paulo@0: void            io_buf_free       (struct io_buf *buf);
paulo@0: uint8_t        *io_buf_free_keep  (struct io_buf *buf);
paulo@0: 
paulo@0: BOOL            io_buf_resize     (struct io_buf *buf, size_t len);
paulo@0: void            io_buf_reset      (struct io_buf *buf);
paulo@0: 
paulo@0: void            io_buf_push       (struct io_buf *buf, size_t len);
paulo@0: void            io_buf_pop        (struct io_buf *buf, size_t len);
paulo@0: 
paulo@0: size_t          io_buf_copy       (struct io_buf *dst, struct io_buf *src,
paulo@0:                                    size_t len);
paulo@0: 
paulo@0: /*****************************************************************************/
paulo@0: 
paulo@0: #endif /* GIFT_GT_IO_BUF_H_ */