File: PetscOptionsPrefixPush.html

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   <div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="PetscOptionsPrefixPush"><H1>PetscOptionsPrefixPush</H1></A>
Designate a prefix to be used by all options insertions to follow. 
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsys.h"   
PetscErrorCode  PetscOptionsPrefixPush(const char prefix[])
</PRE>
Not Collective, but prefix will only be applied on calling ranks
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>prefix </B></TD><TD>- The string to append to the existing prefix
</TD></TR>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
+   -prefix_push &lt;some_prefix_&gt; - push the given prefix
-   -prefix_pop - pop the last prefix
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
It is common to use this in conjunction with -options_file as in
<P>
$ -prefix_push system1_ -options_file system1rc -prefix_pop -prefix_push system2_ -options_file system2rc -prefix_pop
<P>
where the files no longer require all options to be prefixed with -system2_.
<P>

<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
 <A HREF="../Sys/PetscOptionsPrefixPop.html#PetscOptionsPrefixPop">PetscOptionsPrefixPop</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/objects/options.c.html#PetscOptionsPrefixPush">src/sys/objects/options.c</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
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