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greg |
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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Byte swapping routines |
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* |
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* External symbols declared in rtio.h |
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*/ |
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#include "copyright.h" |
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#include "rtio.h" |
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void |
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swap16( /* swap n 16-bit words */ |
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register char *wp, |
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int n |
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) |
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{ |
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register int t; |
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while (n-- > 0) { |
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t = wp[0]; wp[0] = wp[1]; wp[1] = t; |
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wp += 2; |
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} |
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} |
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void |
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swap32( /* swap n 32-bit words */ |
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register char *wp, |
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int n |
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) |
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{ |
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register int t; |
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while (n-- > 0) { |
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t = wp[0]; wp[0] = wp[3]; wp[3] = t; |
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t = wp[1]; wp[1] = wp[2]; wp[2] = t; |
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wp += 4; |
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} |
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} |
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void |
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swap64( /* swap n 64-bit words */ |
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register char *wp, |
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int n |
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) |
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{ |
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register int t; |
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while (n-- > 0) { |
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t = wp[0]; wp[0] = wp[7]; wp[7] = t; |
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t = wp[1]; wp[1] = wp[6]; wp[6] = t; |
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t = wp[2]; wp[2] = wp[5]; wp[5] = t; |
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t = wp[3]; wp[3] = wp[4]; wp[4] = t; |
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wp += 8; |
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} |
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} |
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