Log Library - How is it done in the library code?

[Shaun Case]

Just as a point of minor interest, you can get the exponent of the log
of a string representation of a positive integer by doing a strlen().
(log base 10, of course.)

Example:

strlen("1") -1 ==   0   log == 0
strlen("10") -1 ==  1   log == 1
.
.
.
strlen("1000000") -1 == 7   log == 7

not being a math weenie, I will venture an unsure guess that the
maximum error using this method is ~1.  If you are doing logs
of small numbers, this is obviously unacceptable.

I don't know if doing a trunc/round on a float, followed by a 
conversion to a string and then a strlen is any faster than 
doing a log, but I thought this might be interesting to someone
anyway.  Kind of neat to see a correlation between a number and
its representation in C.

Now, if we could only use strupr() to calculate sin and cos...
:-)

// Shaun //
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