[#BloombergLP-bdlde-Utf8Util-numBytesIfValid]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlde.adoc[bdlde]::xref:BloombergLP/bdlde/Utf8Util.adoc[Utf8Util]::numBytesIfValid
:relfileprefix: ../../../
:mrdocs:

Return the byte length of the first `numCodePoints` encodings.

== Synopsis

Declared in `<bdlde_utf8util.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bdlde/Utf8Util/IntPtr.adoc[Utf8Util::IntPtr]
numBytesIfValid(
    std::string_view const& string,
    xref:BloombergLP/bdlde/Utf8Util/IntPtr.adoc[IntPtr] numCodePoints);
----

== Description

Return the length (in bytes) of the specified `numCodePoints` UTF‐8 encodings in the specified `string`, or a value less than 0 if `string` contains less than `numCodePoints` encodings. The behavior is undefined unless `string` refers to valid UTF‐8. Note that `string` may contain more than `numCodePoints` encodings in which case the trailing ones are ignored.

DEPRECATED: Use `numBytesRaw` instead.

== Return Value

byte length of those encodings, or a negative value if fewer

== Parameters

[cols="1,4"]
|===
| Name| Description
| *string*
| valid UTF‐8 string view to measure
| *numCodePoints*
| number of leading code points to measure
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#