X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=include%2Flttng%2Fust-endian.h;h=8bdb8a7f8fd0b6109ba2e3666cb1c893b7afef52;hb=c5a5ae4fe72a980bc5c0f7cdb3c8b8e797bf8abd;hp=085ff0728e0f7d6fbde7c43e07c4c7e8591ec195;hpb=7e1ca66a973e074ce18d658f99d756c3e1876e09;p=lttng-ust.git

diff --git a/include/lttng/ust-endian.h b/include/lttng/ust-endian.h
index 085ff072..8bdb8a7f 100644
--- a/include/lttng/ust-endian.h
+++ b/include/lttng/ust-endian.h
@@ -1,29 +1,67 @@
-#ifndef _LTTNG_UST_ENDIAN_H
-#define _LTTNG_UST_ENDIAN_H
-
 /*
- * lttng/ust-endian.h
+ * SPDX-License-Identifier: MIT
  *
- * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ */
+
+/*
+ * This header defines the following endian macros based on the current
+ * platform endian headers:
  *
- * endian.h compatibility layer.
+ *   BYTE_ORDER         this macro shall have a value equal to one
+ *                      of the *_ENDIAN macros in this header.
+ *   FLOAT_WORD_ORDER   this macro shall have a value equal to one
+ *                      of the *_ENDIAN macros in this header.
+ *   LITTLE_ENDIAN      if BYTE_ORDER == LITTLE_ENDIAN, the host
+ *                      byte order is from least significant to
+ *                      most significant.
+ *   BIG_ENDIAN         if BYTE_ORDER == BIG_ENDIAN, the host byte
+ *                      order is from most significant to least
+ *                      significant.
  *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ * Direct byte swapping interfaces:
  *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ *   uint16_t bswap_16(uint16_t x); (* swap bytes 16-bit word *)
+ *   uint32_t bswap_32(uint32_t x); (* swap bytes 32-bit word *)
+ *   uint64_t bswap_64(uint32_t x); (* swap bytes 64-bit word *)
  */
 
-#ifdef __linux__
+#ifndef _LTTNG_UST_ENDIAN_H
+#define _LTTNG_UST_ENDIAN_H
+
+#if (defined(__linux__) || defined(__CYGWIN__))
 #include <endian.h>
-#elif __FreeBSD__
-#include <machine/endian.h>
+#include <byteswap.h>
+
+#define lttng_ust_bswap_16(x)		bswap_16(x)
+#define lttng_ust_bswap_32(x)		bswap_32(x)
+#define lttng_ust_bswap_64(x)		bswap_64(x)
+
+#define LTTNG_UST_BYTE_ORDER		__BYTE_ORDER
+#define LTTNG_UST_LITTLE_ENDIAN		__LITTLE_ENDIAN
+#define LTTNG_UST_BIG_ENDIAN		__BIG_ENDIAN
+
+#ifdef __FLOAT_WORD_ORDER
+#define LTTNG_UST_FLOAT_WORD_ORDER	__FLOAT_WORD_ORDER
+#else /* __FLOAT_WORD_ORDER */
+#define LTTNG_UST_FLOAT_WORD_ORDER	__BYTE_ORDER
+#endif /* __FLOAT_WORD_ORDER */
+
+#elif defined(__FreeBSD__)
+
+#include <sys/endian.h>
+
+#define lttng_ust_bswap_16(x)		bswap16(x)
+#define lttng_ust_bswap_32(x)		bswap32(x)
+#define lttng_ust_bswap_64(x)		bswap64(x)
+
+#define LTTNG_UST_BYTE_ORDER		BYTE_ORDER
+#define LTTNG_UST_LITTLE_ENDIAN		LITTLE_ENDIAN
+#define LTTNG_UST_BIG_ENDIAN		BIG_ENDIAN
+#define LTTNG_UST_FLOAT_WORD_ORDER	BYTE_ORDER
+
 #else
-#error "Please add support for your OS into lttng/ust-endian.h."
+#error "Please add support for your OS."
 #endif
 
 #endif /* _LTTNG_UST_ENDIAN_H */