Re: [Boost-users] About naming of integer log in base 2

Subject: Re: [Boost-users] About naming of integer log in base 2
From: Murilo Adriano Vasconcelos (muriloufg_at_[hidden])
Date: 2010-07-16 08:37:02

Hi,

2010/7/15 Steven Watanabe <watanabesj_at_[hidden]>

> AMDG
>
> Paul A. Bristow wrote:
>
>> Murilo Adriano wrote:
>>
>>> I implemented a function [0] which computes the logarithm in base two of
>>> integers and want to know what naming is most
>>>
>>> appropriated:
>>>
>>> ilog2
>>>
>>> or simply
>>>
>>> log2
>>>
>>
>> My instinct is for log2 so it might be specialised for floating point too.
>>
>>
>
> log2 conflicts with the C++0x library which works with floating point
> (and returns a double when it's given an integer).
>

This is the point.

>
> Also, does the function compute floor(log2(x)) or ceil(log2(x))?
>
>
floor(log2(x))

> In Christ,
> Steven Watanabe
>
>
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Best,
-- 
Murilo Adriano Vasconcelos
http://murilo.wordpress.com