From 0f885cbba627efe9b8f763e1c2872e904fe0c0b1 Mon Sep 17 00:00:00 2001
From: Michael Phan-Ba <michael@mikepb.com>
Date: Fri, 31 Jul 2015 20:13:30 -0700
Subject: [PATCH] Initial commit

---
 .gitignore   |  32 +++++++++++++
 README.md    |  36 +++++++++++++++
 endian.h     | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++
 package.json |   9 ++++
 4 files changed, 202 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 endian.h
 create mode 100644 package.json

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bbf313b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,32 @@
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1bab8b4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,36 @@
+# endian.h
+
+This provides the endian conversion functions form endian.h on Windows, Linux,
+*BSD, and Mac OS X. You still need to use `-std=gnu99` instead of `-std=c99`
+for gcc. The functions might actually be macros. Functions: htobe16, htole16,
+be16toh, le16toh, htobe32, htole32, be32toh, le32toh, htobe64, htole64,
+be64toh, le64toh.
+
+The implementation was written by Mathias Panzenböck and published in this
+[Gist][gist].
+
+## Install
+
+Install with [clib(1)]:
+
+```sh
+clib install mikepb/endian.h
+```
+
+## Usage
+
+```c
+#include <stdint.h>
+#include "endian.h"
+
+uint32_t endian32(const uint32_t i) {
+    return be32toh(i);
+}
+```
+
+## License
+
+Public Domain
+
+[clib]: https://github.com/clibs/clib
+[gist]: https://gist.github.com/panzi/6856583
diff --git a/endian.h b/endian.h
new file mode 100644
index 0000000..fe2d6fc
--- /dev/null
+++ b/endian.h
@@ -0,0 +1,125 @@
+//
+// endian.h
+//
+// https://gist.github.com/panzi/6856583
+//
+// I, Mathias Panzenböck, place this file hereby into the public domain. Use
+// it at your own risk for whatever you like. In case there are
+// jurisdictions that don't support putting things in the public domain you
+// can also consider it to be "dual licensed" under the BSD, MIT and Apache
+// licenses, if you want to. This code is trivial anyway. Consider it an
+// example on how to get the endian conversion functions on different
+// platforms.
+
+#ifndef PORTABLE_ENDIAN_H__
+#define PORTABLE_ENDIAN_H__
+
+#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
+
+#	define __WINDOWS__
+
+#endif
+
+#if defined(__linux__) || defined(__CYGWIN__)
+
+#	include <endian.h>
+
+#elif defined(__APPLE__)
+
+#	include <libkern/OSByteOrder.h>
+
+#	define htobe16(x) OSSwapHostToBigInt16(x)
+#	define htole16(x) OSSwapHostToLittleInt16(x)
+#	define be16toh(x) OSSwapBigToHostInt16(x)
+#	define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#	define htobe32(x) OSSwapHostToBigInt32(x)
+#	define htole32(x) OSSwapHostToLittleInt32(x)
+#	define be32toh(x) OSSwapBigToHostInt32(x)
+#	define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#	define htobe64(x) OSSwapHostToBigInt64(x)
+#	define htole64(x) OSSwapHostToLittleInt64(x)
+#	define be64toh(x) OSSwapBigToHostInt64(x)
+#	define le64toh(x) OSSwapLittleToHostInt64(x)
+
+#	define __BYTE_ORDER    BYTE_ORDER
+#	define __BIG_ENDIAN    BIG_ENDIAN
+#	define __LITTLE_ENDIAN LITTLE_ENDIAN
+#	define __PDP_ENDIAN    PDP_ENDIAN
+
+#elif defined(__OpenBSD__)
+
+#	include <sys/endian.h>
+
+#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
+
+#	include <sys/endian.h>
+
+#	define be16toh(x) betoh16(x)
+#	define le16toh(x) letoh16(x)
+
+#	define be32toh(x) betoh32(x)
+#	define le32toh(x) letoh32(x)
+
+#	define be64toh(x) betoh64(x)
+#	define le64toh(x) letoh64(x)
+
+#elif defined(__WINDOWS__)
+
+#	include <winsock2.h>
+#	include <sys/param.h>
+
+#	if BYTE_ORDER == LITTLE_ENDIAN
+
+#		define htobe16(x) htons(x)
+#		define htole16(x) (x)
+#		define be16toh(x) ntohs(x)
+#		define le16toh(x) (x)
+
+#		define htobe32(x) htonl(x)
+#		define htole32(x) (x)
+#		define be32toh(x) ntohl(x)
+#		define le32toh(x) (x)
+
+#		define htobe64(x) htonll(x)
+#		define htole64(x) (x)
+#		define be64toh(x) ntohll(x)
+#		define le64toh(x) (x)
+
+#	elif BYTE_ORDER == BIG_ENDIAN
+
+		/* that would be xbox 360 */
+#		define htobe16(x) (x)
+#		define htole16(x) __builtin_bswap16(x)
+#		define be16toh(x) (x)
+#		define le16toh(x) __builtin_bswap16(x)
+
+#		define htobe32(x) (x)
+#		define htole32(x) __builtin_bswap32(x)
+#		define be32toh(x) (x)
+#		define le32toh(x) __builtin_bswap32(x)
+
+#		define htobe64(x) (x)
+#		define htole64(x) __builtin_bswap64(x)
+#		define be64toh(x) (x)
+#		define le64toh(x) __builtin_bswap64(x)
+
+#	else
+
+#		error byte order not supported
+
+#	endif
+
+#	define __BYTE_ORDER    BYTE_ORDER
+#	define __BIG_ENDIAN    BIG_ENDIAN
+#	define __LITTLE_ENDIAN LITTLE_ENDIAN
+#	define __PDP_ENDIAN    PDP_ENDIAN
+
+#else
+
+#	error platform not supported
+
+#endif
+
+#endif
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..d6b8160
--- /dev/null
+++ b/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "endian",
+  "version": "0.0.1",
+  "repo": "mikepb/endian.h",
+  "description": "Portable endian conversion functions for C",
+  "keywords": ["portable", "endian"],
+  "license": "PD",
+  "src": ["endian.h"]
+}
-- 
2.44.0