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stdarg.3: Describe va_copy() 

See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=575077

Reported-by: Friedrich Delgado Friedrichs <friedel@nomaden.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2013-03-10 13:05:00 +01:00
parent 764d3de3bc
commit 030454526d
1 changed files with 17 additions and 0 deletions
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17
man3/stdarg.3
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@ -153,6 +153,23 @@ are possible.
.BR va_end ()
may be a macro or a function.
.SS va_copy()
The
.BR va_copy ()
macro copies the (previously initialized) variable argument list
.I src
to
.IR dest .
The behavior is as if
.BR va_start ()
were applied to
.IR dest
with the same
.I last
argument, followed by the same number of
.BR va_arg ()
invocations that was used to reach the current state of
.IR src .
.\" Proposal from clive@demon.net, 1997-02-28
An obvious implementation would have a
.I va_list