headers/libs/udis86/libudis86/input.h

   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
  13 uint8_t inp_next(struct ud*);
  14 uint8_t inp_peek(struct ud*);
  15 uint8_t inp_uint8(struct ud*);
  16 uint16_t inp_uint16(struct ud*);
  17 uint32_t inp_uint32(struct ud*);
  18 uint64_t inp_uint64(struct ud*);
  19 void inp_move(struct ud*, size_t);
  20 void inp_back(struct ud*);
  21
  22 /* inp_init() - Initializes the input system. */
  23 #define inp_init(u) \
  24 do { \
  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) \
  38 do { \
  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