1/*
2 * Dropbear - a SSH2 server
3 *
4 * Copyright (c) 2002,2003 Matt Johnston
5 * All rights reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE. */
24
25#ifndef _BUFFER_H_
26
27#define _BUFFER_H_
28
29#include "includes.h"
30
31struct buf {
32
33	unsigned char * data;
34	unsigned int len; /* the used size */
35	unsigned int pos;
36	unsigned int size; /* the memory size */
37
38};
39
40typedef struct buf buffer;
41
42buffer * buf_new(unsigned int size);
43void buf_resize(buffer *buf, unsigned int newsize);
44void buf_free(buffer* buf);
45void buf_burn(buffer* buf);
46buffer* buf_newcopy(buffer* buf);
47void buf_setlen(buffer* buf, unsigned int len);
48void buf_incrlen(buffer* buf, unsigned int incr);
49void buf_setpos(buffer* buf, unsigned int pos);
50void buf_incrpos(buffer* buf, int incr); /* -ve is ok, to go backwards */
51void buf_incrwritepos(buffer* buf, unsigned int incr);
52unsigned char buf_getbyte(buffer* buf);
53unsigned char buf_getbool(buffer* buf);
54void buf_putbyte(buffer* buf, unsigned char val);
55unsigned char* buf_getptr(buffer* buf, unsigned int len);
56unsigned char* buf_getwriteptr(buffer* buf, unsigned int len);
57unsigned char* buf_getstring(buffer* buf, unsigned int *retlen);
58void buf_eatstring(buffer *buf);
59void buf_putint(buffer* buf, unsigned int val);
60void buf_putstring(buffer* buf, const unsigned char* str, unsigned int len);
61void buf_putbytes(buffer *buf, const unsigned char *bytes, unsigned int len);
62void buf_putmpint(buffer* buf, mp_int * mp);
63int buf_getmpint(buffer* buf, mp_int* mp);
64unsigned int buf_getint(buffer* buf);
65
66#endif /* _BUFFER_H_ */
67