/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */

  #ifndef LIBFDT_ENV_H
  #define LIBFDT_ENV_H

  /*
   * libfdt - Flat Device Tree manipulation
   * Copyright (C) 2006 David Gibson, IBM Corporation.
   * Copyright 2012 Kim Phillips, Freescale Semiconductor.

   */

  #include <stdbool.h>

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

  #include <stdlib.h>

  #include <string.h>

  #include <limits.h>

  #ifdef __CHECKER__

  #define FDT_FORCE __attribute__((force))
  #define FDT_BITWISE __attribute__((bitwise))

  #else

  #define FDT_FORCE
  #define FDT_BITWISE

  #endif

  typedef uint16_t FDT_BITWISE fdt16_t;
  typedef uint32_t FDT_BITWISE fdt32_t;
  typedef uint64_t FDT_BITWISE fdt64_t;

  
  #define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
  #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
  #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
  			 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
  #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
  			 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
  			 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
  			 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
  
  static inline uint16_t fdt16_to_cpu(fdt16_t x)
  {

  	return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);

  }
  static inline fdt16_t cpu_to_fdt16(uint16_t x)

  {

  	return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);

  }

  static inline uint32_t fdt32_to_cpu(fdt32_t x)

  {

  	return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);

  }
  static inline fdt32_t cpu_to_fdt32(uint32_t x)
  {

  	return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);

  }

  static inline uint64_t fdt64_to_cpu(fdt64_t x)
  {

  	return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);

  }
  static inline fdt64_t cpu_to_fdt64(uint64_t x)

  {

  	return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);

  }

  #undef CPU_TO_FDT64
  #undef CPU_TO_FDT32
  #undef CPU_TO_FDT16

  #undef EXTRACT_BYTE

  #ifdef __APPLE__
  #include <AvailabilityMacros.h>
  
  /* strnlen() is not available on Mac OS < 10.7 */
  # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
                                           MAC_OS_X_VERSION_10_7)
  
  #define strnlen fdt_strnlen
  
  /*
   * fdt_strnlen: returns the length of a string or max_count - which ever is
   * smallest.
   * Input 1 string: the string whose size is to be determined
   * Input 2 max_count: the maximum value returned by this function
   * Output: length of the string or max_count (the smallest of the two)
   */
  static inline size_t fdt_strnlen(const char *string, size_t max_count)
  {
      const char *p = memchr(string, 0, max_count);
      return p ? p - string : max_count;
  }
  
  #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
            MAC_OS_X_VERSION_10_7) */
  
  #endif /* __APPLE__ */
  
  #endif /* LIBFDT_ENV_H */