1 /*

2 * $Id: io_buf.h,v 1.2 2003/09/17 17:44:11 hipnod Exp $

3 *

4 * Copyright (C) 2003 giFT project (gift.sourceforge.net)

5 *

6 * This program is free software; you can redistribute it and/or modify it

7 * under the terms of the GNU General Public License as published by the

8 * Free Software Foundation; either version 2, or (at your option) any

9 * later version.

10 *

11 * This program is distributed in the hope that it will be useful, but

12 * WITHOUT ANY WARRANTY; without even the implied warranty of

13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

14 * General Public License for more details.

15 */

16

17 #ifndef GIFT_GT_IO_BUF_H_

18 #define GIFT_GT_IO_BUF_H_

19

20 /*****************************************************************************/

21

22 /*

23 * This duplicates libgift's String somewhat...

24 */

25 struct io_buf

26 {

27 uint8_t *data;

28 size_t size;

29 size_t r_offs;

30 size_t w_offs;

31 };

32

33 /*****************************************************************************/

34

35 /*

36 * Macros for accessing particular things about an I/O buf...

37 */

38

39 #define io_buf_read_avail(io_buf) \

40 ((io_buf)->w_offs - (io_buf)->r_offs)

41

42 #define io_buf_len(io_buf) \

43 ((io_buf)->w_offs)

44

45 #define io_buf_size(io_buf) \

46 ((io_buf)->size)

47

48 #define io_buf_write_avail(io_buf) \

49 ((io_buf)->size - (io_buf)->w_offs)

50

51 #define io_buf_write_ptr(io_buf) \

52 (&(io_buf)->data[(io_buf)->w_offs])

53

54 #define io_buf_read_ptr(iobuf) \

55 (&(iobuf)->data[(iobuf)->r_offs])

56

57 /*****************************************************************************/

58

59 struct io_buf *io_buf_new (size_t len);

60 void io_buf_free (struct io_buf *buf);

61 uint8_t *io_buf_free_keep (struct io_buf *buf);

62

63 BOOL io_buf_resize (struct io_buf *buf, size_t len);

64 void io_buf_reset (struct io_buf *buf);

65

66 void io_buf_push (struct io_buf *buf, size_t len);

67 void io_buf_pop (struct io_buf *buf, size_t len);

68

69 size_t io_buf_copy (struct io_buf *dst, struct io_buf *src,

70 size_t len);

71

72 /*****************************************************************************/

73

74 #endif /* GIFT_GT_IO_BUF_H_ */