[#BloombergLP-balst-Resolver_FileHelper-readExact]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balst.adoc[balst]::xref:BloombergLP/balst/Resolver_FileHelper.adoc[Resolver_FileHelper]::readExact
:relfileprefix: ../../../
:mrdocs:

Read into the specified `outSpan` exactly the specified `outSpan.size()` bytes of data starting at the specified `offset` in the current ELF file. Return 0 on success, or a negative value otherwise. The behavior is undefined unless `!outSpan.empty()` and `offset >= 0`.

== Synopsis

Declared in `<balst_resolver_filehelper.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
readExact(
    xref:BloombergLP/balst/Resolver_FileHelper.adoc[Span] const& outSpan,
    xref:BloombergLP/balst/Resolver_FileHelper/Offset.adoc[Offset] offset) const;
----


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