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48 lines
2.2 KiB
Plaintext
48 lines
2.2 KiB
Plaintext
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# $OpenBSD: sqroot.m4,v 1.2 1996/06/26 05:36:20 deraadt Exp $
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# $NetBSD: sqroot.m4,v 1.4 1995/09/28 05:38:01 tls Exp $
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#
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# Copyright (c) 1989, 1993
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# The Regents of the University of California. All rights reserved.
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#
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# This code is derived from software contributed to Berkeley by
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# Ozan Yigit.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
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# must display the following acknowledgement:
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# This product includes software developed by the University of
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# California, Berkeley and its contributors.
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# 4. Neither the name of the University nor the names of its contributors
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# may be used to endorse or promote products derived from this software
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# without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# @(#)sqroot.m4 8.1 (Berkeley) 6/6/93
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#
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define(square_root,
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`ifelse(eval($1<0),1,negative-square-root,
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`square_root_aux($1, 1, eval(($1+1)/2))')')
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define(square_root_aux,
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`ifelse($3, $2, $3,
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$3, eval($1/$2), $3,
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`square_root_aux($1, $3, eval(($3+($1/$3))/2))')')
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