uint8  i = 2; uint16 j = i; Does the second assignment change the meaning of 2?

Cheap theatrics. Cos now int i = -1; uint j = i; it does.

Presumably you mean "anything else that might cause perl to use the 32/64-bit string format",

Nope! I meant exactly what I said.

Paraphrase: If I populate the PV of a perl scalar with byte values, and later call SvPVX() to gain access to those byte values, I will get back exactly what I put in them...unless in the interim, I explicitly do something to change them. No presumptions or assumptions. Simply fact.

And using SvPVX() will NEVER cause it to

silently encode your bytes using UTF-8.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"I'd rather go naked than blow up my ass"

In reply to Re^23: Interleaving bytes in a string quickly by BrowserUk
in thread Interleaving bytes in a string quickly by BrowserUk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.