| /* udis86 - libudis86/input.h |
| * |
| * Copyright (c) 2002-2009 Vivek Thampi |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #ifndef UD_INPUT_H |
| #define UD_INPUT_H |
| |
| #include "types.h" |
| #include "udint.h" |
| |
| uint8_t ud_inp_next(struct ud* u); |
| |
| /* |
| * inp_start |
| * Should be called before each de-code operation. |
| */ |
| static inline void |
| inp_start(struct ud *u) |
| { |
| u->inp_ctr = 0; |
| } |
| |
| /* inp_reset |
| * Resets the current pointer to its position before the current |
| * instruction disassembly was started. |
| */ |
| static inline void |
| inp_reset(struct ud *u) |
| { |
| u->inp_curr -= u->inp_ctr; |
| u->inp_ctr = 0; |
| } |
| |
| /* inp_sess |
| * Returns the pointer to current session. |
| */ |
| static inline uint8_t* |
| inp_sess(struct ud *u) |
| { |
| return u->inp_sess; |
| } |
| |
| /* |
| * inp_curr |
| * Returns the current input byte. |
| */ |
| static inline uint8_t |
| inp_curr(const struct ud *u) |
| { |
| return u->inp_cache[u->inp_curr]; |
| } |
| |
| /* |
| * inp_back |
| * Move back a single byte in the stream. |
| */ |
| static inline void |
| inp_back(struct ud* u) |
| { |
| if (u->inp_ctr > 0) { |
| --u->inp_curr; |
| --u->inp_ctr; |
| } |
| } |
| |
| /* |
| * inp_peek |
| * Peek next byte in input. |
| */ |
| static inline uint8_t |
| inp_peek(struct ud* u) |
| { |
| uint8_t r = ud_inp_next(u); |
| if (!u->error) { |
| inp_back(u); /* Don't backup if there was an error */ |
| } |
| return r; |
| } |
| |
| |
| /* |
| * inp_len |
| * Returns the number of bytes input in the current |
| * session. |
| */ |
| static inline size_t |
| inp_len(const struct ud *u) |
| { |
| return u->inp_ctr; |
| } |
| |
| #endif /* UD_INPUT_H */ |
| /* |
| vim: set ts=2 sw=2 expandtab |
| */ |