[#BloombergLP-bdlbb-BlobUtil-append-06]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlbb.adoc[bdlbb]::xref:BloombergLP/bdlbb/BlobUtil.adoc[BlobUtil]::append
:relfileprefix: ../../../
:mrdocs:

Append a byte range from a contiguous address onto `dest`.

== Synopsis

Declared in `<bdlbb_blobutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
void
append(
    xref:BloombergLP/bdlbb/Blob.adoc[Blob]* dest,
    char const* source,
    int offset,
    int length);
----

== Description

Append the specified `length` bytes starting from the specified `offset` from the specified `source` address to the specified `dest`. The behavior of this function is undefined unless the range `[source + offset, source + offset + length)]` represents a readable sequence of memory, and `length <= dest‐>totalSize() ‐ dest‐>length()` or `0 != dest‐>factory()`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dest*
| destination blob
| *source*
| contiguous source address
| *offset*
| starting byte offset in `source`
| *length*
| number of bytes to append
|===


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