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     鞍ﾅフ,尭ｿﾂ ﾜ    /* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef UTIL_H
#define UTIL_H

#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <getopt.h>

/*
 * Copyright 2011 The Chromium Authors, All Rights Reserved.
 * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
 */

#ifdef __GNUC__
#ifdef __clang__
#define PRINTF(i, j)	__attribute__((format (printf, i, j)))
#else
#define PRINTF(i, j)	__attribute__((format (gnu_printf, i, j)))
#endif
#define NORETURN	__attribute__((noreturn))
#else
#define PRINTF(i, j)
#define NORETURN
#endif

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

#define stringify(s)	stringify_(s)
#define stringify_(s)	#s

static inline void NORETURN PRINTF(1, 2) die(const char *str, ...)
{
	va_list ap;

	va_start(ap, str);
	fprintf(stderr, "FATAL ERROR: ");
	vfprintf(stderr, str, ap);
	va_end(ap);
	exit(1);
}

static inline void *xmalloc(size_t len)
{
	void *new = malloc(len);

	if (!new)
		die("malloc() failed\n");

	return new;
}

static inline void *xrealloc(void *p, size_t len)
{
	void *new = realloc(p, len);

	if (!new)
		die("realloc() failed (len=%zd)\n", len);

	return new;
}

extern char *xstrdup(const char *s);

extern int PRINTF(2, 3) xasprintf(char **strp, const char *fmt, ...);
extern int PRINTF(2, 3) xasprintf_append(char **strp, const char *fmt, ...);
extern int xavsprintf_append(char **strp, const char *fmt, va_list ap);
extern char *join_path(const char *path, const char *name);

/**
 * Check a property of a given length to see if it is all printable and
 * has a valid terminator. The property can contain either a single string,
 * or multiple strings each of non-zero length.
 *
 * @param data	The string to check
 * @param len	The string length including terminator
 * @return 1 if a valid printable string, 0 if not
 */
bool util_is_printable_string(const void *data, int len);

/*
 * Parse an escaped character starting at index i in string s.  The resulting
 * character will be returned and the index i will be updated to point at the
 * character directly after the end of the encoding, this may be the '\0'
 * terminator of the string.
 */
char get_escape_char(const char *s, int *i);

/**
 * Read a device tree file into a buffer. This will report any errors on
 * stderr.
 *
 * @param filename	The filename to read, or - for stdin
 * @param len		If non-NULL, the amount of data we managed to read
 * @return Pointer to allocated buffer containing fdt, or NULL on error
 */
char *utilfdt_read(const char *filename, size_t *len);

/**
 * Read a device tree file into a buffer. Does not report errors, but only
 * returns them. The value returned can be passed to strerror() to obtain
 * an error message for the user.
 *
 * @param filename	The filename to read, or - for stdin
 * @param buffp		Returns pointer to buffer containing fdt
 * @param len		If non-NULL, the amount of data we managed to read
 * @return 0 if ok, else an errno value representing the error
 */
int utilfdt_read_err(const char *filename, char **buffp, size_t *len);

/**
 * Write a device tree buffer to a file. This will report any errors on
 * stderr.
 *
 * @param filename	The filename to write, or - for stdout
 * @param blob		Pointer to buffer containing fdt
 * @return 0 if ok, -1 on error
 */
int utilfdt_write(const char *filename, const void *blob);

/**
 * Write a device tree buffer to a file. Does not report errors, but only
 * returns them. The value returned can be passed to strerror() to obtain
 * an error message for the user.
 *
 * @param filename	The filename to write, or - for stdout
 * @param blob		Pointer to buffer containing fdt
 * @return 0 if ok, else an errno value representing the error
 */
int utilfdt_write_err(const char *filename, const void *blob);

/**
 * Decode a data type string. The purpose of this string
 *
 * The string consists of an optional character followed by the type:
 *	Modifier characters:
 *		hh or b	1 byte
 *		h	2 byte
 *		l	4 b