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/*
 * Copyright (C) 2008-2010 Daisuke Aoyama <aoyama@peach.ne.jp>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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 AUTHOR 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 AUTHOR 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 ISTGT_MISC_H
#define ISTGT_MISC_H

#include <stdint.h>
#include <stddef.h>
#include <stdio.h>

#define ISTGT_USE_MACRO_EXPAND

#ifdef ISTGT_USE_MACRO_EXPAND
#define DSET8(B,D)  (*((uint8_t *)(B)) = (uint8_t)(D))
#define DSET16(B,D)													\
	(((*((uint8_t *)(B)+0)) = (uint8_t)((uint16_t)(D) >> 8)),		\
	 ((*((uint8_t *)(B)+1)) = (uint8_t)((uint16_t)(D) >> 0)))
#define DSET24(B,D)													\
	(((*((uint8_t *)(B)+0)) = (uint8_t)((uint32_t)(D) >> 16)),		\
	 ((*((uint8_t *)(B)+1)) = (uint8_t)((uint32_t)(D) >> 8)),		\
	 ((*((uint8_t *)(B)+2)) = (uint8_t)((uint32_t)(D) >> 0)))
#define DSET32(B,D)													\
	(((*((uint8_t *)(B)+0)) = (uint8_t)((uint32_t)(D) >> 24)),		\
	 ((*((uint8_t *)(B)+1)) = (uint8_t)((uint32_t)(D) >> 16)),		\
	 ((*((uint8_t *)(B)+2)) = (uint8_t)((uint32_t)(D) >> 8)),		\
	 ((*((uint8_t *)(B)+3)) = (uint8_t)((uint32_t)(D) >> 0)))
#define DSET48(B,D)													\
	(((*((uint8_t *)(B)+0)) = (uint8_t)((uint64_t)(D) >> 40)),		\
	 ((*((uint8_t *)(B)+1)) = (uint8_t)((uint64_t)(D) >> 32)),		\
	 ((*((uint8_t *)(B)+2)) = (uint8_t)((uint64_t)(D) >> 24)),		\
	 ((*((uint8_t *)(B)+3)) = (uint8_t)((uint64_t)(D) >> 16)),		\
	 ((*((uint8_t *)(B)+4)) = (uint8_t)((uint64_t)(D) >> 8)),		\
	 ((*((uint8_t *)(B)+5)) = (uint8_t)((uint64_t)(D) >> 0)))
#define DSET64(B,D)													\
	(((*((uint8_t *)(B)+0)) = (uint8_t)((uint64_t)(D) >> 56)),		\
	 ((*((uint8_t *)(B)+1)) = (uint8_t)((uint64_t)(D) >> 48)),		\
	 ((*((uint8_t *)(B)+2)) = (uint8_t)((uint64_t)(D) >> 40)),		\
	 ((*((uint8_t *)(B)+3)) = (uint8_t)((uint64_t)(D) >> 32)),		\
	 ((*((uint8_t *)(B)+4)) = (uint8_t)((uint64_t)(D) >> 24)),		\
	 ((*((uint8_t *)(B)+5)) = (uint8_t)((uint64_t)(D) >> 16)),		\
	 ((*((uint8_t *)(B)+6)) = (uint8_t)((uint64_t)(D) >> 8)),		\
	 ((*((uint8_t *)(B)+7)) = (uint8_t)((uint64_t)(D) >> 0)))
#define DGET8(B)    (*((uint8_t *)(B)))
#define DGET16(B)											\
	(((  (uint16_t) *((uint8_t *)(B)+0)) << 8)				\
	 | (((uint16_t) *((uint8_t *)(B)+1)) << 0))
#define DGET24(B)											\
	(((  (uint32_t) *((uint8_t *)(B)+0)) << 16)				\
	 | (((uint32_t) *((uint8_t *)(B)+1)) << 8)				\
	 | (((uint32_t) *((uint8_t *)(B)+2)) << 0))
#define DGET32(B)											\
	(((  (uint32_t) *((uint8_t *)(B)+0)) << 24)				\
	 | (((uint32_t) *((uint8_t *)(B)+1)) << 16)				\
	 | (((uint32_t) *((uint8_t *)(B)+2)) << 8)				\
	 | (((uint32_t) *((uint8_t *)(B)+3)) << 0))
#define DGET48(B)											\
	(((  (uint64_t) *((uint8_t *)(B)+0)) << 40)				\
	 | (((uint64_t) *((uint8_t *)(B)+1)) << 32)				\
	 | (((uint64_t) *((uint8_t *)(B)+2)) << 24)				\
	 | (((uint64_t) *((uint8_t *)(B)+3)) << 16)				\
	 | (((uint64_t) *((uint8_t *)(B)+4)) << 8)				\
	 | (((uint64_t) *((uint8_t *)(B)+5)) << 0))
#define DGET64(B)											\
	(((  (uint64_t) *((uint8_t *)(B)+0)) << 56)				\
	 | (((uint64_t) *((uint8_t *)(B)+1)) << 48)				\
	 | (((uint64_t) *((uint8_t *)(B)+2)) << 40)				\
	 | (((uint64_t) *((uint8_t *)(B)+3)) << 32)				\
	 | (((uint64_t) *((uint8_t *)(B)+4)) << 24)				\
	 | (((uint64_t) *((uint8_t *)(B)+5)) << 16)				\
	 | (((uint64_t) *((uint8_t *)(B)+6)) << 8)				\
	 | (((uint64_t) *((uint8_t *)(B)+7)) << 0))
#else /* ISTGT_USE_MACRO_EXPAND */
//#define DSET8(B,D)  (istgt_dset8((B),(D)))
#define DSET8(B,D)  (*((uint8_t *)(B)) = (uint8_t)(D))
#define DSET16(B,D) (istgt_dset16((B),(D)))
#define DSET24(B,D) (istgt_dset24((B),(D)))
#define DSET32(B,D) (istgt_dset32((B),(D)))
#define DSET48(B,D) (istgt_dset48((B),(D)))
#define DSET64(B,D) (istgt_dset64((B),(D)))
//#define DGET8(B)    (istgt_dget8((B)))
#define DGET8(B)    (*((uint8_t *)(B)))
#define DGET16(B)   (istgt_dget16((B)))
#define DGET24(B)   (istgt_dget24((B)))
#define DGET32(B)   (istgt_dget32((B)))
#define DGET48(B)   (istgt_dget48((B)))
#define DGET64(B)   (istgt_dget64((B)))
#endif /* ISTGT_USE_MACRO_EXPAND */

#define DMIN8(A,B)  ((uint8_t)  ((A) > (B) ? (B) : (A)))
#define DMIN16(A,B) ((uint16_t) ((A) > (B) ? (B) : (A)))
#define DMIN24(A,B) ((uint32_t) ((A) > (B) ? (B) : (A)))
#define DMIN32(A,B) ((uint32_t) ((A) > (B) ? (B) : (A)))
#define DMIN48(A,B) ((uint64_t) ((A) > (B) ? (B) : (A)))
#define DMIN64(A,B) ((uint64_t) ((A) > (B) ? (B) : (A)))
#define DMAX8(A,B)  ((uint8_t)  ((A) > (B) ? (A) : (B)))
#define DMAX16(A,B) ((uint16_t) ((A) > (B) ? (A) : (B)))
#define DMAX24(A,B) ((uint32_t) ((A) > (B) ? (A) : (B)))
#define DMAX32(A,B) ((uint32_t) ((A) > (B) ? (A) : (B)))
#define DMAX48(A,B) ((uint64_t) ((A) > (B) ? (A) : (B)))
#define DMAX64(A,B) ((uint64_t) ((A) > (B) ? (A) : (B)))

#define BSHIFTNW(N,W) (((W) > 0) ? (((N) > ((W)-1)) ? ((N) - ((W)-1)) : 0) : 0)
#define BMASKW(W) (((W) > 0) ? (~((~0) << (W))) : 0)

#define BDSET8W(B,D,N,W) DSET8((B),(((D)&BMASKW((W)))<<BSHIFTNW((N),(W))))
#define BDADD8W(B,D,N,W) DSET8((B),((DGET8((B)) & ~(BMASKW((W)) << BSHIFTNW((N),(W)))) | (uint8_t) (((D) & BMASKW((W))) << BSHIFTNW((N),(W)))))
#define BSET8W(B,N,W) (*((uint8_t *)(B)) |= (uint8_t) (BMASKW((W))) << BSHIFTNW((N),(W)))
#define BCLR8W(B,N,W) (*((uint8_t *)(B)) &= (uint8_t) (~(BMASKW((W))) << BSHIFTNW((N),(W))))
#define BGET8W(B,N,W) ((*((uint8_t *)(B)) >> BSHIFTNW((N),(W))) & BMASKW((W)))

#define BDSET8(B,D,N) (BDSET8W((B),(D),(N),1))
#define BDADD8(B,D,N) (BDADD8W((B),(D),(N),1))
#define BSET8(B,N) (BSET8W((B),(N),1))
#define BCLR8(B,N) (BCLR8W((B),(N),1))
#define BGET8(B,N) (BGET8W((B),(N),1))

/* memory allocate */
void *xmalloc(size_t size);
void *xrealloc(void *p, size_t size);
void xfree(void *p);
char *xstrdup(const char *s);

/* string functions */
char *strlwr(char *s);
char *strupr(char *s);
char *strsepq(char **stringp, const char *delim);
char *trim_string(char *s);
char *escape_string(const char *s);
#ifndef HAVE_STRLCPY
size_t strlcpy(char *dst, const char *src, size_t size);
#endif /* HAVE_STRLCPY */

/* convert from/to LBA/MSF */
uint32_t istgt_msf2lba(uint32_t msf);
uint32_t istgt_lba2msf(uint32_t lba);

/* network byte order operation */
uint8_t istgt_dget8(const uint8_t *data);
void istgt_dset8(uint8_t *data, uint32_t value);
uint16_t istgt_dget16(const uint8_t *data);
void istgt_dset16(uint8_t *data, uint32_t value);
uint32_t istgt_dget24(const uint8_t *data);
void istgt_dset24(uint8_t *data, uint32_t value);
uint32_t istgt_dget32(const uint8_t *data);
void istgt_dset32(uint8_t *data, uint32_t value);
uint64_t istgt_dget48(const uint8_t *data);
void istgt_dset48(uint8_t *data, uint64_t value);
uint64_t istgt_dget64(const uint8_t *data);
void istgt_dset64(uint8_t *data, uint64_t value);

/* random value generation */
void istgt_gen_random(uint8_t *buf, size_t len);
#ifndef HAVE_SRANDOMDEV
void srandomdev(void);
#endif /* HAVE_SRANDOMDEV */
#ifndef HAVE_ARC4RANDOM
uint32_t arc4random(void);
#endif /* HAVE_ARC4RANDOM */

/* convert from/to bin/hex */
int istgt_bin2hex(char *buf, size_t len, const uint8_t *data, size_t data_len);
int istgt_hex2bin(uint8_t *data, size_t data_len, const char *str);

/* other functions */
void istgt_dump(const char *label, const uint8_t *buf, size_t len);
void istgt_fdump(FILE *fp, const char *label, const uint8_t *buf, size_t len);
void istgt_yield(void);

#endif /* ISTGT_MISC_H */