/* udis86 - libudis86/udis86.c
 *
 * 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.
 */

#include "input.h"
#include "extern.h"

#ifndef __UD_STANDALONE__
# include <stdlib.h>
# include <string.h>
#endif /* __UD_STANDALONE__ */

/* =============================================================================
 * ud_init() - Initializes ud_t object.
 * =============================================================================
 */
extern void 
ud_init(struct ud* u)
{
  memset((void*)u, 0, sizeof(struct ud));
  ud_set_mode(u, 16);
  u->mnemonic = UD_Iinvalid;
  ud_set_pc(u, 0);
#ifndef __UD_STANDALONE__
  ud_set_input_file(u, stdin);
#endif /* __UD_STANDALONE__ */
}

/* =============================================================================
 * ud_disassemble() - disassembles one instruction and returns the number of 
 * bytes disassembled. A zero means end of disassembly.
 * =============================================================================
 */
extern unsigned int
ud_disassemble(struct ud* u)
{
  if (ud_input_end(u))
	return 0;

 
  u->insn_buffer[0] = u->insn_hexcode[0] = 0;

 
  if (ud_decode(u) == 0)
	return 0;
  if (u->translator)
	u->translator(u);
  return ud_insn_len(u);
}

/* =============================================================================
 * ud_set_mode() - Set Disassemly Mode.
 * =============================================================================
 */
extern void 
ud_set_mode(struct ud* u, uint8_t m)
{
  switch(m) {
	case 16:
	case 32:
	case 64: u->dis_mode = m ; return;
	default: u->dis_mode = 16; return;
  }
}

/* =============================================================================
 * ud_set_vendor() - Set vendor.
 * =============================================================================
 */
extern void 
ud_set_vendor(struct ud* u, unsigned v)
{
  switch(v) {
	case UD_VENDOR_INTEL:
		u->vendor = v;
		break;
	case UD_VENDOR_ANY:
		u->vendor = v;
		break;
	default:
		u->vendor = UD_VENDOR_AMD;
  }
}

/* =============================================================================
 * ud_set_pc() - Sets code origin. 
 * =============================================================================
 */
extern void 
ud_set_pc(struct ud* u, uint64_t o)
{
  u->pc = o;
}

/* =============================================================================
 * ud_set_syntax() - Sets the output syntax.
 * =============================================================================
 */
extern void 
ud_set_syntax(struct ud* u, void (*t)(struct ud*))
{
  u->translator = t;
}

/* =============================================================================
 * ud_insn() - returns the disassembled instruction
 * =============================================================================
 */
extern char* 
ud_insn_asm(struct ud* u) 
{
  return u->insn_buffer;
}

/* =============================================================================
 * ud_insn_offset() - Returns the offset.
 * =============================================================================
 */
extern uint64_t
ud_insn_off(struct ud* u) 
{
  return u->insn_offset;
}


/* =============================================================================
 * ud_insn_hex() - Returns hex form of disassembled instruction.
 * =============================================================================
 */
extern char* 
ud_insn_hex(struct ud* u) 
{
  return u->insn_hexcode;
}

/* =============================================================================
 * ud_insn_ptr() - Returns code disassembled.
 * =============================================================================
 */
extern uint8_t* 
ud_insn_ptr(struct ud* u) 
{
  return u->inp_sess;
}

/* =============================================================================
 * ud_insn_len() - Returns the count of bytes disassembled.
 * =============================================================================
 */
extern unsigned int 
ud_insn_len(struct ud* u) 
{
  return u->inp_ctr;
}