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- From `perldoc perlapi`:

    newSVpv Creates a new SV and copies a string into it.  The reference count 
            for the SV is set to 1.  If "len" is zero, Perl will compute the 
            length using strlen().  For efficiency, consider using "newSVpvn" 
            instead.

                       SV*     newSVpv(const char* s, STRLEN len)

    newSVpvn Creates a new SV and copies a string into it.  The reference count 
             for the SV is set to 1.  Note that if "len" is zero, Perl will 
             create a zero length string.  You are responsible for ensuring that 
             the source string is at least "len" bytes long.  If the "s" 
             argument is NULL the new SV will be undefined.

                       SV*     newSVpvn(const char* s, STRLEN len)

I know that in our code, we always use newSVpvn.  But I'm not sure I can explain 
why.

- -- 
Stephen Clouse <stephenc@theiqgroup.com>
Senior Programmer/DBE, Core Technology Developer
The IQ Group, Inc. <http://www.theiqgroup.com/>

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