[#BloombergLP-bsls-OutputRedirector-compare-0eb]
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Compare the character buffer pointed to by the specified pointer `expected` with any output that has been loaded into the scratch buffer. The `expected` buffer is assumed to be a NTBS, and its length is taken to be the string length of the NTBS. Return 0 if the `expected` buffer has the same length and contents as the scratch buffer, and non‐zero otherwise. The behavior is undefined unless `enable` has previously been called successfully.

== Synopsis

Declared in `<bsls_outputredirector.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
compare(char const* expected) const;
----


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