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