43 lines
872 B
C
43 lines
872 B
C
/*
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Copyright 2017-2023 Ian Jauslin
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <math.h>
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#include "int_tools.h"
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// return smallest power of 2 that is > x
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int smallest_pow2(
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int x
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){
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return ipow(2,((int)log2(x)+1));
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}
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// integer power
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int ipow(
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int x,
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int n
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){
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int out=1;
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while (n>0)
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{
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if (n%2==1){
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out*=x;
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}
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n/=2;
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x*=x;
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}
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return out;
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}
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