/*
 * Greate deal of the code was taken from the kernel UBIFS implementation, and
 * this file contains some "glue" definitions.
 */

#ifndef __UBIFS_DEFS_H__
#define __UBIFS_DEFS_H__

#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <byteswap.h>
#include <errno.h>

extern int debug_level;

#define dbg_msg(lvl, fmt, ...) do {if (debug_level >= lvl)                \
	printf("mkfs.ubifs: %s: " fmt "\n", __FUNCTION__, ##__VA_ARGS__); \
} while(0)

#define err_msg(fmt, ...) ({                                \
	fprintf(stderr, "Error: " fmt "\n", ##__VA_ARGS__); \
	-1;                                                 \
})

#define sys_err_msg(fmt, ...) ({                                         \
	int err_ = errno;                                                \
	fprintf(stderr, "Error: " fmt "\n", ##__VA_ARGS__);              \
	fprintf(stderr, "       %s (error %d)\n", strerror(err_), err_); \
	-1;                                                              \
})

#define t16(x) ({ \
	uint16_t __b = (x); \
	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_16(__b); \
})

#define t32(x) ({ \
	uint32_t __b = (x); \
	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_32(__b); \
})

#define t64(x) ({ \
	uint64_t __b = (x); \
	(__LITTLE_ENDIAN==__BYTE_ORDER) ? __b : bswap_64(__b); \
})

#define cpu_to_le16(x) ((__le16){t16(x)})
#define cpu_to_le32(x) ((__le32){t32(x)})
#define cpu_to_le64(x) ((__le64){t64(x)})

#define le16_to_cpu(x) (t16((x)))
#define le32_to_cpu(x) (t32((x)))
#define le64_to_cpu(x) (t64((x)))

#define unlikely(x) (x)

struct qstr
{
	char *name;
	size_t len;
};

/**
 * fls - find last (most-significant) bit set
 * @x: the word to search
 *
 * This is defined the same way as ffs.
 * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
 */
static inline int fls(int x)
{
	int r = 32;

	if (!x)
		return 0;
	if (!(x & 0xffff0000u)) {
		x <<= 16;
		r -= 16;
	}
	if (!(x & 0xff000000u)) {
		x <<= 8;
		r -= 8;
	}
	if (!(x & 0xf0000000u)) {
		x <<= 4;
		r -= 4;
	}
	if (!(x & 0xc0000000u)) {
		x <<= 2;
		r -= 2;
	}
	if (!(x & 0x80000000u)) {
		x <<= 1;
		r -= 1;
	}
	return r;
}

#define do_div(n,base) ({ \
int __res; \
__res = ((unsigned long) n) % (unsigned) base; \
n = ((unsigned long) n) / (unsigned) base; \
__res; })

#if INT_MAX != 0x7fffffff
#error : sizeof(int) must be 4 for this program
#endif

#if (~0ULL) != 0xffffffffffffffffULL
#error : sizeof(long long) must be 8 for this program
#endif

#endif