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authorTim Angus <tim@ngus.net>2009-10-26 00:10:07 +0000
committerTim Angus <tim@ngus.net>2013-01-03 00:17:05 +0000
commit0fed3b1c32d99560482ea162b197531439df76e5 (patch)
treedd5f74d3124715a538462aa474f9af294f79bbbd /src/SDL12/include/SDL_endian.h
parentaf6fd4fa5aaa4dc7c59ae54ead20d5ef0fbcc946 (diff)
* Merge ioq3-r1708
Diffstat (limited to 'src/SDL12/include/SDL_endian.h')
-rw-r--r--src/SDL12/include/SDL_endian.h53
1 files changed, 35 insertions, 18 deletions
diff --git a/src/SDL12/include/SDL_endian.h b/src/SDL12/include/SDL_endian.h
index 6257a649..f7a2e2f8 100644
--- a/src/SDL12/include/SDL_endian.h
+++ b/src/SDL12/include/SDL_endian.h
@@ -1,6 +1,6 @@
/*
SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
+ Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -20,16 +20,23 @@
slouken@libsdl.org
*/
-/* Functions for reading and writing endian-specific values */
+/**
+ * @file SDL_endian.h
+ * Functions for reading and writing endian-specific values
+ */
#ifndef _SDL_endian_h
#define _SDL_endian_h
#include "SDL_stdinc.h"
-/* The two types of endianness */
+/** @name SDL_ENDIANs
+ * The two types of endianness
+ */
+/*@{*/
#define SDL_LIL_ENDIAN 1234
#define SDL_BIG_ENDIAN 4321
+/*@}*/
#ifndef SDL_BYTEORDER /* Not defined in SDL_config.h? */
#if defined(__hppa__) || \
@@ -50,13 +57,16 @@
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.
-*/
+/**
+ * @name SDL_Swap Functions
+ * 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.
+ */
+/*@{*/
#if defined(__GNUC__) && defined(__i386__) && \
- !(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */)
+ !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
static __inline__ Uint16 SDL_Swap16(Uint16 x)
{
__asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
@@ -88,7 +98,8 @@ static __inline__ Uint16 SDL_Swap16(Uint16 x) {
}
#endif
-#if defined(__GNUC__) && defined(__i386__)
+#if defined(__GNUC__) && defined(__i386__) && \
+ !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
static __inline__ Uint32 SDL_Swap32(Uint32 x)
{
__asm__("bswap %0" : "=r" (x) : "0" (x));
@@ -123,7 +134,8 @@ static __inline__ Uint32 SDL_Swap32(Uint32 x) {
#endif
#ifdef SDL_HAS_64BIT_TYPE
-#if defined(__GNUC__) && defined(__i386__)
+#if defined(__GNUC__) && defined(__i386__) && \
+ !(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
static __inline__ Uint64 SDL_Swap64(Uint64 x)
{
union {
@@ -148,9 +160,9 @@ static __inline__ Uint64 SDL_Swap64(Uint64 x)
Uint32 hi, lo;
/* Separate into high and low 32-bit values and swap them */
- lo = (Uint32)(x&0xFFFFFFFF);
+ lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
x >>= 32;
- hi = (Uint32)(x&0xFFFFFFFF);
+ hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
x = SDL_Swap32(lo);
x <<= 32;
x |= SDL_Swap32(hi);
@@ -159,14 +171,18 @@ static __inline__ Uint64 SDL_Swap64(Uint64 x)
#endif
#else
/* 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.
-*/
+ * 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 SDL_Swap64(X) (X)
#endif /* SDL_HAS_64BIT_TYPE */
+/*@}*/
-
-/* Byteswap item from the specified endianness to the native endianness */
+/**
+ * @name SDL_SwapLE and SDL_SwapBE Functions
+ * Byteswap item from the specified endianness to the native endianness
+ */
+/*@{*/
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
#define SDL_SwapLE16(X) (X)
#define SDL_SwapLE32(X) (X)
@@ -182,6 +198,7 @@ static __inline__ Uint64 SDL_Swap64(Uint64 x)
#define SDL_SwapBE32(X) (X)
#define SDL_SwapBE64(X) (X)
#endif
+/*@}*/
/* Ends C function definitions when using C++ */
#ifdef __cplusplus