1/* -----------------------------------------------------------------------------
2 * input.h
3 *
4 * Copyright (c) 2006, Vivek Mohan <vivek@sig9.com>
5 * All rights reserved. See LICENSE
6 * -----------------------------------------------------------------------------
7 */
8#ifndef UD_INPUT_H
9#define UD_INPUT_H
10
11#include "types.h"
12
13uint8_t inp_next(struct ud*);
14uint8_t inp_peek(struct ud*);
15uint8_t inp_uint8(struct ud*);
16uint16_t inp_uint16(struct ud*);
17uint32_t inp_uint32(struct ud*);
18uint64_t inp_uint64(struct ud*);
19void inp_move(struct ud*, size_t);
20void inp_back(struct ud*);
21
22/* inp_init() - Initializes the input system. */
23#define inp_init(u) \
24do { \
25  u->inp_curr = 0; \
26  u->inp_fill = 0; \
27  u->inp_ctr  = 0; \
28  u->inp_end  = 0; \
29} while (0)
30
31/* inp_start() - Should be called before each de-code operation. */
32#define inp_start(u) u->inp_ctr = 0
33
34/* inp_back() - Resets the current pointer to its position before the current
35 * instruction disassembly was started.
36 */
37#define inp_reset(u) \
38do { \
39  u->inp_curr -= u->inp_ctr; \
40  u->inp_ctr = 0; \
41} while (0)
42
43/* inp_sess() - Returns the pointer to current session. */
44#define inp_sess(u) (u->inp_sess)
45
46/* inp_cur() - Returns the current input byte. */
47#define inp_curr(u) ((u)->inp_cache[(u)->inp_curr])
48
49#endif
50