From 7f6002caba3f0a6749820c2772161caf55b8d267 Mon Sep 17 00:00:00 2001
From: neonloop
Date: Fri, 7 May 2021 20:00:12 +0000
Subject: Initial commit (uqm-0.8.0)

---
 src/endian_uqm.h | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 src/endian_uqm.h

(limited to 'src/endian_uqm.h')

diff --git a/src/endian_uqm.h b/src/endian_uqm.h
new file mode 100644
index 0000000..057da4c
--- /dev/null
+++ b/src/endian_uqm.h
@@ -0,0 +1,136 @@
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * Endian swapping, taken from SDL-1.2.5 sources and modified
+ * Original copyright (C) Sam Lantinga
+ */
+
+#ifndef ENDIAN_UQM_H_
+#define ENDIAN_UQM_H_
+
+#include "config.h"
+#include "types.h"
+
+#if defined (__APPLE__) && defined (__GNUC__)
+// When using the MacOS gcc compiler to build universal binaries,
+// each file will be compiled once for each platform.
+// This means that checking endianness beforehand from build.sh will not do,
+// but fortunately, gcc defines __BIG_ENDIAN__ or __LITTLE_ENDIAN__ on
+// this platform.
+#	if defined(__BIG_ENDIAN__)
+#		undef WORDS_BIGENDIAN
+#		define WORDS_BIGENDIAN
+#	elif defined(__LITTLE_ENDIAN__)
+#		undef WORDS_BIGENDIAN
+#	else
+		// Neither __BIG_ENDIAN__ nor __LITTLE_ENDIAN__ is defined.
+		// Fallback to using the build.sh defined value.
+#	endif
+#endif  /* __APPLE__ */
+
+#if defined(_MSC_VER) || defined(__BORLANDC__) || \
+    defined(__DMC__) || defined(__SC__) || \
+    defined(__WATCOMC__) || defined(__LCC__)
+#ifndef __inline__
+#define __inline__	__inline
+#endif
+#endif
+
+/* The macros used to swap values */
+/* Try to use superfast macros on systems that support them */
+#ifdef linux
+#include <endian.h>
+#ifdef __arch__swab16
+#define UQM_Swap16  __arch__swab16
+#endif
+#ifdef __arch__swab32
+#define UQM_Swap32  __arch__swab32
+#endif
+#endif /* linux */
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/* Use inline functions for compilers that support them, and static
+   functions for those that do not.  Because these functions become
+   static for compilers that do not support inline functions, this
+   header should only be included in files that actually use them.
+*/
+#ifndef UQM_Swap16
+static __inline__ uint16 UQM_Swap16(uint16 D)
+{
+	return((D<<8)|(D>>8));
+}
+#endif
+#ifndef UQM_Swap32
+static __inline__ uint32 UQM_Swap32(uint32 D)
+{
+	return((D<<24)|((D<<8)&0x00FF0000)|((D>>8)&0x0000FF00)|(D>>24));
+}
+#endif
+#ifdef UQM_INT64
+#ifndef UQM_Swap64
+static __inline__ uint64 UQM_Swap64(uint64 val)
+{
+	uint32 hi, lo;
+
+	/* Separate into high and low 32-bit values and swap them */
+	lo = (uint32)(val&0xFFFFFFFF);
+	val >>= 32;
+	hi = (uint32)(val&0xFFFFFFFF);
+	val = UQM_Swap32(lo);
+	val <<= 32;
+	val |= UQM_Swap32(hi);
+	return(val);
+}
+#endif
+#else
+#ifndef UQM_Swap64
+/* This is mainly to keep compilers from complaining in SDL code.
+   If there is no real 64-bit datatype, then compilers will complain about
+   the fake 64-bit datatype that SDL provides when it compiles user code.
+*/
+#define UQM_Swap64(X)	(X)
+#endif
+#endif /* UQM_INT64 */
+
+
+/* Byteswap item from the specified endianness to the native endianness
+ * or vice versa.
+ */
+#ifndef WORDS_BIGENDIAN
+#define UQM_SwapLE16(X)	(X)
+#define UQM_SwapLE32(X)	(X)
+#define UQM_SwapLE64(X)	(X)
+#define UQM_SwapBE16(X)	UQM_Swap16(X)
+#define UQM_SwapBE32(X)	UQM_Swap32(X)
+#define UQM_SwapBE64(X)	UQM_Swap64(X)
+#else
+#define UQM_SwapLE16(X)	UQM_Swap16(X)
+#define UQM_SwapLE32(X)	UQM_Swap32(X)
+#define UQM_SwapLE64(X)	UQM_Swap64(X)
+#define UQM_SwapBE16(X)	(X)
+#define UQM_SwapBE32(X)	(X)
+#define UQM_SwapBE64(X)	(X)
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* _ENDIAN_H */
-- 
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