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Ceiling to the Nearest Power of 2?

Primary Software: LabWindows/CVI Run-Time Engine
Primary Software Version: 7.0
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem: In C, how can I round a number to the nearest power of 2, greater or equal to the entered value?

Solution:

/* The variable "value" is the user entered number. */
static ViInt32 CoerceToPower2 ( ViInt32 value )
{
   ViInt32 i;
   for(i = 0; i < value; i <<= 1);
   return i;
}

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Report Date: 10/13/1999
Last Updated: 05/28/2004
Document ID: 1QCAG1EE

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