27 lines
646 B
C
27 lines
646 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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#define MASK 0x7fffffffL
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#define NORM (1.0/(1.0+MASK))
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double
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jehanne_frand(void)
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{
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double x;
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do {
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x = jehanne_lrand() * NORM;
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x = (x + jehanne_lrand()) * NORM;
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} while(x >= 1);
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return x;
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}
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