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- /*-
- * Copyright (c) 2021 M. Warner Losh <imp@FreeBSD.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- /*
- * A mostly Linux/glibc-compatible endian.h
- */
- #ifndef _ENDIAN_H_
- #define _ENDIAN_H_
- /*
- * POSIX Issue 8 requires that endian.h define uint{16,32,64}_t. Although POSIX
- * allows stdint.h symbols here, be conservative and only define there required
- * ones. FreeBSD's sys/_endian.h doesn't need to expose those types since it
- * implements all the [bl]eXtoh hto[bl]eX interfaces as macros calling builtin
- * functions. POSIX allows functions, macros or both. We opt for macros only.
- */
- #include <sys/_types.h>
- #ifndef _UINT16_T_DECLARED
- typedef __uint16_t uint16_t;
- #define _UINT16_T_DECLARED
- #endif
- #ifndef _UINT32_T_DECLARED
- typedef __uint32_t uint32_t;
- #define _UINT32_T_DECLARED
- #endif
- #ifndef _UINT64_T_DECLARED
- typedef __uint64_t uint64_t;
- #define _UINT64_T_DECLARED
- #endif
- /*
- * FreeBSD's sys/_endian.h is very close to the interface provided on Linux by
- * glibc's endian.h as well as POSIX Issue 8's endian.h.
- */
- #include <sys/_endian.h>
- /*
- * glibc uses double underscore for these symbols. Define these unconditionally.
- * The compiler defines __BYTE_ORDER__ these days, so we don't do anything
- * with that since sys/endian.h defines _BYTE_ORDER based on it.
- */
- #define __BIG_ENDIAN _BIG_ENDIAN
- #define __BYTE_ORDER _BYTE_ORDER
- #define __LITTLE_ENDIAN _LITTLE_ENDIAN
- #define __PDP_ENDIAN _PDP_ENDIAN
- /*
- * FreeBSD's sys/endian.h and machine/endian.h doesn't define a separate
- * byte order for floats. Use the host non-float byte order.
- */
- #define __FLOAT_WORD_ORDER _BYTE_ORDER
- /*
- * We don't define BIG_ENDI, LITTLE_ENDI, HIGH_HALF and LOW_HALF macros that
- * glibc's endian.h defines since those appear to be internal to glibc.
- * We also don't try to emulate the various helper macros that glibc uses to
- * limit namespace visibility.
- */
- #endif /* _ENDIAN_H_ */
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