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| /pliant/graphic/misc/float.pli |
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abstract | |
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[A few floatting point utility functions, that should stand elsewhere.] | |
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# Copyright Hubert Tonneau hubert.tonneau@pliant.cx | |
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# | |
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# This program is free software; you can redistribute it and/or | |
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# modify it under the terms of the GNU General Public License version 2 | |
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# as published by the Free Software Foundation. | |
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# | |
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# This program is distributed in the hope that it will be useful, | |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of | |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
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# GNU General Public License for more details. | |
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# | |
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# You should have received a copy of the GNU General Public License | |
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# version 2 along with this program; if not, write to the Free Software | |
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
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function compute_float_max -> f | |
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arg Float f | |
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f := 1 | |
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var Float s := 256 | |
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while s>1 | |
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if f*s=defined | |
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f *= s | |
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else | |
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s /= 2 | |
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public | |
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constant float_max compute_float_max | |
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constant float_min -float_max | |
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function bound f mini maxi -> b | |
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arg Float f mini maxi b | |
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b := shunt f<mini mini f>maxi maxi f | |
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function pow2 x -> y | |
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arg Float x y | |
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y := x*x | |
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