[#BloombergLP-bdlb-BitStringUtil-orEqual]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/BitStringUtil.adoc[BitStringUtil]::orEqual
:relfileprefix: ../../../
:mrdocs:

Bitwise OR the specified `numBits` of the specified `dstBitString` starting at the specified `dstIndex` with the `numBits` of the specified `srcBitString` starting at the specified `srcIndex`, and write the result over the bits that were read from `dstBitString`&period; The behavior is undefined unless `dstBitString` has a length of at least `dstIndex &plus; numBits` and `srcBitString` has a length of at least `srcIndex &plus; numBits`&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;bitstringutil&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void
orEqual(
    uint64&lowbar;t* dstBitString,
    std::size&lowbar;t dstIndex,
    uint64&lowbar;t const* srcBitString,
    std::size&lowbar;t srcIndex,
    std::size&lowbar;t numBits);
----


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