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FFI: Record ffi.copy() and ffi.fill().

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This commit is contained in:
Mike Pall
2011-02-07 23:49:27 +01:00
parent fb53d4aeb7
commit 7a37b93f1b
5 changed files with 57 additions and 19 deletions
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8
doc/ext_ffi_api.html
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@@ -312,13 +312,13 @@ is converted to a <tt>"const void&nbsp;*"</tt>.
</p>
<p>
In the first syntax, <tt>len</tt> gives the number of bytes to copy.
In case <tt>src</tt> is a Lua string, the maximum copy length is the
number of bytes of the string plus a zero-terminator. Caveat: the
copied data may not be zero-terminated if <tt>len&nbsp;&le;&nbsp;#src</tt>.
Caveat: if <tt>src</tt> is a Lua string, then <tt>len</tt> must not
exceed <tt>#src+1</tt>.
</p>
<p>
In the second syntax, the source of the copy must be a Lua string. All
bytes of the string plus a zero-terminator are copied to <tt>dst</tt>.
bytes of the string <em>plus a zero-terminator</em> are copied to
<tt>dst</tt> (i.e. <tt>#src+1</tt> bytes).
</p>
<p>
Performance notice: <tt>ffi.copy()</tt> may be used as a faster