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| Rev | Author | Line No. | Line |
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| 298 | serge | 1 | // Emacs style mode select -*- C++ -*- |
| 2 | //----------------------------------------------------------------------------- |
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| 3 | // |
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| 4 | // $Id:$ |
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| 5 | // |
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| 6 | // Copyright (C) 1993-1996 by id Software, Inc. |
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| 7 | // |
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| 8 | // This source is available for distribution and/or modification |
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| 9 | // only under the terms of the DOOM Source Code License as |
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| 10 | // published by id Software. All rights reserved. |
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| 11 | // |
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| 12 | // The source is distributed in the hope that it will be useful, |
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| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License |
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| 15 | // for more details. |
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| 16 | // |
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| 17 | // $Log:$ |
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| 18 | // |
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| 19 | // DESCRIPTION: |
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| 20 | // Endianess handling, swapping 16bit and 32bit. |
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| 21 | // |
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| 22 | //----------------------------------------------------------------------------- |
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| 23 | |||
| 24 | static const char |
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| 25 | rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $"; |
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| 26 | |||
| 27 | |||
| 28 | #ifdef __GNUG__ |
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| 29 | #pragma implementation "m_swap.h" |
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| 30 | #endif |
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| 31 | #include "m_swap.h" |
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| 32 | |||
| 33 | |||
| 34 | // Swap 16bit, that is, MSB and LSB byte. |
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| 35 | unsigned short SwapSHORT(unsigned short x) |
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| 36 | { |
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| 37 | // No masking with 0xFF should be necessary. |
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| 38 | return (x>>8) | (x<<8); |
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| 39 | } |
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| 40 | |||
| 41 | // Swapping 32bit. |
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| 42 | unsigned long SwapLONG( unsigned long x) |
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| 43 | { |
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| 44 | return |
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| 45 | (x>>24) |
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| 46 | | ((x>>8) & 0xff00) |
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| 47 | | ((x<<8) & 0xff0000) |
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| 48 | | (x<<24); |
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| 49 | } |
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| 50 | |||
| 51 |