endian.h 2.5 KB

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  1. //
  2. // Copyright 2026 Aarav Ravindra Kharade
  3. //
  4. // Licensed under the Apache License, Version 2.0 (the "License");
  5. // you may not use this file except in compliance with the License.
  6. // You may obtain a copy of the License at
  7. //
  8. // http://www.apache.org/licenses/LICENSE-2.0
  9. //
  10. // Unless required by applicable law or agreed to in writing, software
  11. // distributed under the License is distributed on an "AS IS" BASIS,
  12. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. // See the License for the specific language governing permissions and
  14. // limitations under the License.
  15. //
  16. /* Endian macros for string.h functions
  17. Copyright (C) 1992-2026 Free Software Foundation, Inc.
  18. This file is part of the GNU C Library.
  19. The GNU C Library is free software; you can redistribute it and/or
  20. modify it under the terms of the GNU Lesser General Public
  21. License as published by the Free Software Foundation; either
  22. version 2.1 of the License, or (at your option) any later version.
  23. The GNU C Library is distributed in the hope that it will be useful,
  24. but WITHOUT ANY WARRANTY; without even the implied warranty of
  25. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  26. Lesser General Public License for more details.
  27. You should have received a copy of the GNU Lesser General Public
  28. License along with the GNU C Library; if not, see
  29. <http://www.gnu.org/licenses/>. */
  30. #ifndef _BITS_ENDIAN_H
  31. #define _BITS_ENDIAN_H 1
  32. /* Definitions for byte order, according to significance of bytes,
  33. from low addresses to high addresses. The value is what you get by
  34. putting '4' in the most significant byte, '3' in the second most
  35. significant byte, '2' in the second least significant byte, and '1'
  36. in the least significant byte, and then writing down one digit for
  37. each byte, starting with the byte at the lowest address at the left,
  38. and proceeding to the byte with the highest address at the right. */
  39. #define __LITTLE_ENDIAN 1234
  40. #define __BIG_ENDIAN 4321
  41. #define __PDP_ENDIAN 3412
  42. /* This file defines `__BYTE_ORDER' for the particular machine. */
  43. #include <bits/endianness.h>
  44. /* Some machines may need to use a different endianness for floating point
  45. values. */
  46. #ifndef __FLOAT_WORD_ORDER
  47. # define __FLOAT_WORD_ORDER __BYTE_ORDER
  48. #endif
  49. #if __BYTE_ORDER == __LITTLE_ENDIAN
  50. # define __LONG_LONG_PAIR(HI, LO) LO, HI
  51. #elif __BYTE_ORDER == __BIG_ENDIAN
  52. # define __LONG_LONG_PAIR(HI, LO) HI, LO
  53. #endif
  54. #endif /* bits/endian.h */