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<div id="version" align=right><b>petsc-3.4.2 2013-07-02</b></div>
<A NAME="PetscBinaryRead"><H1>PetscBinaryRead</H1></A>
Reads from a binary file.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
PetscErrorCode PetscBinaryRead(int fd,void *p,PetscInt n,PetscDataType type)
</PRE>
Not Collective
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fd </B></TD><TD>- the file
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>n </B></TD><TD>- the number of items to read
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>type </B></TD><TD>- the type of items to read (PETSC_INT, PETSC_DOUBLE or PETSC_SCALAR)
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<DT><B>p </B> -the buffer
<br>
<P>
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<A HREF="../Sys/PetscBinaryRead.html#PetscBinaryRead">PetscBinaryRead</A>() uses byte swapping to work on all machines; the files
are written to file ALWAYS using big-endian ordering. On small-endian machines the numbers
are converted to the small-endian format when they are read in from the file.
When PETSc is ./configure with --with-64bit-indices the integers are written to the
file as 64 bit integers, this means they can only be read back in when the option --with-64bit-indices
is used.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Sys/PetscBinaryWrite.html#PetscBinaryWrite">PetscBinaryWrite</A>(), <A HREF="../Sys/PetscBinaryOpen.html#PetscBinaryOpen">PetscBinaryOpen</A>(), <A HREF="../Sys/PetscBinaryClose.html#PetscBinaryClose">PetscBinaryClose</A>(), <A HREF="../Viewer/PetscViewerBinaryGetDescriptor.html#PetscViewerBinaryGetDescriptor">PetscViewerBinaryGetDescriptor</A>(), <A HREF="../Sys/PetscBinarySynchronizedWrite.html#PetscBinarySynchronizedWrite">PetscBinarySynchronizedWrite</A>(),
<BR><A HREF="../Sys/PetscBinarySynchronizedRead.html#PetscBinarySynchronizedRead">PetscBinarySynchronizedRead</A>(), <A HREF="../Sys/PetscBinarySynchronizedSeek.html#PetscBinarySynchronizedSeek">PetscBinarySynchronizedSeek</A>()
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/fileio/sysio.c.html#PetscBinaryRead">src/sys/fileio/sysio.c</A>
<BR><A HREF="./index.html">Index of all Sys routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/vec/vec/examples/tutorials/ex6.c.html">src/vec/vec/examples/tutorials/ex6.c.html</A><BR>
<A HREF="../../../src/mat/examples/tutorials/ex5.c.html">src/mat/examples/tutorials/ex5.c.html</A><BR>
<A HREF="../../../src/ksp/ksp/examples/tutorials/ex54f.F.html">src/ksp/ksp/examples/tutorials/ex54f.F.html</A><BR>
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