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<TITLE>ISGetIndices</TITLE>
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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.7.5 v3.7.5 docs/manualpages/IS/ISGetIndices.html "><small>Report Typos and Errors</small></a></div>
<A NAME="ISGetIndices"><H1>ISGetIndices</H1></A>
Returns a pointer to the indices. The user should call <A HREF="../IS/ISRestoreIndices.html#ISRestoreIndices">ISRestoreIndices</A>() after having looked at the indices. The user should NOT change the indices.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscis.h"
PetscErrorCode ISGetIndices(IS is,const PetscInt *ptr[])
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>is </B> -the index set
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>ptr </B> -the location to put the pointer to the indices
<br>
<P>
<H3><FONT COLOR="#CC3333">Fortran Note</FONT></H3>
This routine is used differently from Fortran
<pre>
<A HREF="../IS/IS.html#IS">IS</A> is
</pre>
<pre>
integer is_array(1)
</pre>
<pre>
<A HREF="../Sys/PetscOffset.html#PetscOffset">PetscOffset</A> i_is
</pre>
<pre>
int ierr
</pre>
<pre>
call <A HREF="../IS/ISGetIndices.html#ISGetIndices">ISGetIndices</A>(is,is_array,i_is,ierr)
</pre>
<pre>
</pre>
<pre>
Access first local entry in list
</pre>
<pre>
value = is_array(i_is + 1)
</pre>
<pre>
</pre>
<pre>
...... other code
</pre>
<pre>
call <A HREF="../IS/ISRestoreIndices.html#ISRestoreIndices">ISRestoreIndices</A>(is,is_array,i_is,ierr)
</pre>
<P>
See the Fortran chapter of the users manual and
petsc/src/is/examples/[tutorials,tests] for details.
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../IS/ISRestoreIndices.html#ISRestoreIndices">ISRestoreIndices</A>(), <A HREF="../IS/ISGetIndicesF90.html#ISGetIndicesF90">ISGetIndicesF90</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>intermediate
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/vec/is/is/interface/index.c.html#ISGetIndices">src/vec/is/is/interface/index.c</A>
<BR><A HREF="./index.html">Index of all IS routines</A>
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