[#BloombergLP-bdlb-BitStringImpUtil-setEqBits]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/BitStringImpUtil.adoc[BitStringImpUtil]::setEqBits
:relfileprefix: ../../../
:mrdocs:

Replace `numBits` in `*dstValue` with the low‐order bits of `srcValue`.

== Synopsis

Declared in `<bdlb_bitstringimputil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void
setEqBits(
    uint64_t* dstValue,
    int dstIndex,
    uint64_t srcValue,
    int numBits);
----

== Description

Replace the specified `numBits` in the specified `dstValue` starting at the specified `dstIndex` with the least‐significant `numBits` of the specified `srcValue`. The behavior is undefined unless `0 <= dstIndex`, `0 <= numBits`, and `dstIndex + numBits <= k_BITS_PER_UINT64`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dstValue*
| destination word to modify
| *dstIndex*
| index of the first destination bit
| *srcValue*
| source bits to assign
| *numBits*
| number of bits to replace
|===


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