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common.c (COM_Init): updated endianism check.

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git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@48 af15c1b1-3010-417e-b628-4374ebc0bcbd
This commit is contained in:
Ozkan Sezer 2010-02-18 12:00:31 +00:00
parent 44ad29724b
commit 4065ce7280
1 changed files with 21 additions and 6 deletions
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27
Quake/common.c
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@ -1204,12 +1204,28 @@ COM_Init
*/ */
void COM_Init (char *basedir) void COM_Init (char *basedir)
{ {
byte swaptest[2] = {1,0}; int i = 0x12345678;
/* U N I X */
// set the byte swapping variables in a portable manner /*
if ( *(short *)swaptest == 1) BE_ORDER: 12 34 56 78
{ U N I X
LE_ORDER: 78 56 34 12
X I N U
PDP_ORDER: 34 12 78 56
N U X I
*/
if ( *(char *)&i == 0x12 )
bigendien = true;
else if ( *(char *)&i == 0x78 )
bigendien = false; bigendien = false;
else /* if ( *(char *)&i == 0x34 ) */
Sys_Error ("Unsupported endianism.");
if (bigendien == false)
{
BigShort = ShortSwap; BigShort = ShortSwap;
LittleShort = ShortNoSwap; LittleShort = ShortNoSwap;
BigLong = LongSwap; BigLong = LongSwap;
@ -1217,9 +1233,8 @@ void COM_Init (char *basedir)
BigFloat = FloatSwap; BigFloat = FloatSwap;
LittleFloat = FloatNoSwap; LittleFloat = FloatNoSwap;
} }
else else /* we are big endian: */
{ {
bigendien = true;
BigShort = ShortNoSwap; BigShort = ShortNoSwap;
LittleShort = ShortSwap; LittleShort = ShortSwap;
BigLong = LongNoSwap; BigLong = LongNoSwap;