/* 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
*/