From 040e428e08eedabed3994941a1b098a56827ca1d Mon Sep 17 00:00:00 2001
From: John Mark Bell <jmb@netsurf-browser.org>
Date: Thu, 2 Jul 2009 17:53:52 +0000
Subject: Remove dependency on a library providing ntohl/htonl.

svn path=/trunk/libparserutils/; revision=8267
---
 src/utils/endian.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 src/utils/endian.h

(limited to 'src/utils/endian.h')

diff --git a/src/utils/endian.h b/src/utils/endian.h
new file mode 100644
index 0000000..6dc36a0
--- /dev/null
+++ b/src/utils/endian.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of LibParserUtils.
+ * Licensed under the MIT License,
+ *                http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
+ */
+
+#ifndef parserutils_endian_h_
+#define parserutils_endian_h_
+
+static inline bool endian_host_is_le(void)
+{
+	uint32_t magic = 0x01020304;
+
+	return (((uint8_t *) &magic)[0] == 0x04);
+}
+
+static inline uint32_t endian_swap(uint32_t val)
+{
+	return ((val & 0xff000000) >> 24) | ((val & 0x00ff0000) >> 8) |
+		((val & 0x0000ff00) << 8) | ((val & 0x000000ff) << 24);
+}
+
+static inline uint32_t endian_host_to_big(uint32_t host)
+{
+	if (endian_host_is_le())
+		return endian_swap(host);
+
+	return host;
+}
+
+static inline uint32_t endian_big_to_host(uint32_t big)
+{
+	if (endian_host_is_le())
+		return endian_swap(big);
+
+	return big;
+}
+
+#endif
-- 
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