#ifndef _WIMLIB_UTIL_H
#define _WIMLIB_UTIL_H

#include <stdio.h>
#include <stdbool.h>
#include <stddef.h>
#include <inttypes.h>
#include <sys/types.h>
#include "config.h"

#ifdef __GNUC__
#	define WIMLIBAPI __attribute__((visibility("default")))
#	define NOINLINE __attribute__((noinline))
#	define ALWAYS_INLINE inline __attribute__((always_inline))
#	define FORMAT(type, format_str, args_start) \
			__attribute__((format(type, format_str, args_start)))
#	if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
#		define COLD     __attribute__((cold))
#		define HOT      __attribute__((hot))
#	else
#		define COLD
#		define HOT
#	endif
#else
#	define WIMLIBAPI
#	define NOINLINE
#	define ALWAYS_INLINE inline
#	define FORMAT(type, format_str, args_start)
#	define COLD
#	define HOT
#endif /* __GNUC__ */

typedef uint8_t  u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef unsigned uint;

#define min(a, b) ({ typeof(a) __a = (a); typeof(b) __b = (b); \
					(__a < __b) ? __a : __b; })
#define max(a, b) ({ typeof(a) __a = (a); typeof(b) __b = (b); \
					(__a > __b) ? __a : __b; })
#define swap(a, b) ({typeof(a) _a = a; (a) = (b); (b) = _a;})

#define ARRAY_LEN(array) (sizeof(array) / sizeof((array)[0]))

#define ZERO_ARRAY(array) memset(array, 0, sizeof(array))

/* Used for buffering FILE IO in a few places */
#define BUFFER_SIZE 4096

#ifdef ENABLE_ERROR_MESSAGES
extern bool __wimlib_print_errors;
extern void wimlib_error(const char *format, ...) 
		FORMAT(printf, 1, 2) COLD;
extern void wimlib_error_with_errno(const char *format, ...) 
		FORMAT(printf, 1, 2) COLD;
extern void wimlib_warning(const char *format, ...)
		FORMAT(printf, 1, 2) COLD;
#	define ERROR		wimlib_error
#	define ERROR_WITH_ERRNO wimlib_error_with_errno
#	define WARNING		wimlib_warning
#else
#	define ERROR(format, ...)
#	define ERROR_WITH_ERRNO(format, ...)
#	define WARNING(format, ...)
#endif /* ENABLE_ERROR_MESSAGES */

#if defined(ENABLE_DEBUG) || defined(ENABLE_MORE_DEBUG)
#	include <errno.h>
#	define DEBUG(format, ...)					\
	({								\
 		int __errno_save = errno;				\
		fprintf(stdout, "[%s %d] %s(): " format,		\
			__FILE__, __LINE__, __func__, ## __VA_ARGS__);	\
	 	putchar('\n');						\
		fflush(stdout);						\
		errno = __errno_save;					\
	})

#else
#	define DEBUG(format, ...)
#endif /* ENABLE_DEBUG || ENABLE_MORE_DEBUG */

#ifdef ENABLE_MORE_DEBUG
#	define DEBUG2(format, ...) DEBUG(format, ## __VA_ARGS__)
#else
#	define DEBUG2(format, ...)
#endif /* ENABLE_DEBUG */

#ifdef ENABLE_ASSERTIONS
#include <assert.h>
#	define wimlib_assert(expr) assert(expr)
#else
#	define wimlib_assert(expr)
#endif


#ifdef ENABLE_CUSTOM_MEMORY_ALLOCATOR
extern void *(*wimlib_malloc_func)(size_t);
extern void (*wimlib_free_func)(void *);
extern void *(*wimlib_realloc_func)(void *, size_t);
extern void *wimlib_calloc(size_t nmemb, size_t size);
extern char *wimlib_strdup(const char *str);
#	define	MALLOC	wimlib_malloc_func
#	define	FREE	wimlib_free_func
#	define	REALLOC	wimlib_realloc_func
#	define	CALLOC	wimlib_calloc
#	define	STRDUP	wimlib_strdup
#else
#	include <stdlib.h>
#	include <string.h>
#	define	MALLOC	malloc
#	define	FREE	free
#	define	REALLOC	realloc
#	define	CALLOC	calloc
#	define	STRDUP	strdup
#endif /* ENABLE_CUSTOM_MEMORY_ALLOCATOR */


extern char *utf16_to_utf8(const char *utf16_str, size_t utf16_len,
			   size_t *utf8_len_ret);

extern char *utf8_to_utf16(const char *utf8_str, size_t utf8_len, 
			   size_t *utf16_len_ret);

extern void randomize_byte_array(u8 *p, size_t n);

extern void randomize_char_array_with_alnum(char p[], size_t n);

extern const char *path_next_part(const char *path, 
				  size_t *first_part_len_ret);

extern const char *path_basename(const char *path);

extern void to_parent_name(char buf[], size_t len);

extern void print_string(const void *string, size_t len);

extern int get_num_path_components(const char *path);

extern ssize_t full_write(int fd, const void *buf, size_t n);

static inline void print_byte_field(const u8 field[], size_t len)
{
	while (len--)
		printf("%02hhx", *field++);
}


#endif /* _WIMLIB_UTIL_H */