86 lines
1.2 KiB
C
86 lines
1.2 KiB
C
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/*
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$Log$
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Revision 1.14 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.1.1.1 2003/02/12 13:59:15 matteo
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mer feb 12 14:56:57 CET 2003
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Revision 1.2 2000/01/05 08:20:39 markster
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Some OSS fixes and a few lpc changes to make it actually work
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* Revision 1.1 1996/08/19 22:32:10 jaf
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* Initial revision
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*
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*/
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/*
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* f2clib.c
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*
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* SCCS ID: @(#)f2clib.c 1.2 96/05/19
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*/
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#include "f2c.h"
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#ifdef KR_headers
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integer pow_ii(ap, bp) integer *ap, *bp;
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#else
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integer pow_ii(integer *ap, integer *bp)
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#endif
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{
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integer pow, x, n;
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unsigned long u;
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x = *ap;
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n = *bp;
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if (n <= 0) {
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if (n == 0 || x == 1)
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return 1;
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if (x != -1)
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return x == 0 ? 0 : 1/x;
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n = -n;
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}
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u = n;
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for(pow = 1; ; )
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{
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if(u & 01)
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pow *= x;
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if(u >>= 1)
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x *= x;
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else
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break;
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}
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return(pow);
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}
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#ifdef KR_headers
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double r_sign(a,b) real *a, *b;
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#else
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double r_sign(real *a, real *b)
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#endif
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{
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double x;
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x = (*a >= 0 ? *a : - *a);
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return( *b >= 0 ? x : -x);
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}
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#ifdef KR_headers
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double floor();
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integer i_nint(x) real *x;
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#else
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#undef abs
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#include "math.h"
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integer i_nint(real *x)
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#endif
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{
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return( (integer)((*x)>=0 ?
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floor(*x + .5) : -floor(.5 - *x)) );
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}
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