[#BloombergLP-balxml-MiniReader-open-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balxml.adoc[balxml]::xref:BloombergLP/balxml/MiniReader.adoc[MiniReader]::open
:relfileprefix: ../../../
:mrdocs:

Set up the reader for parsing using the data contained in the specified (XML) `buffer` of the specified `size`, set the base URL to the optionally specified `url` and set the encoding value to the optionally specified `encoding` ("ASCII", "UTF‐8", etc). Return 0 on success and non‐zero otherwise. If `url` is null 0 or a blank string is passed, then base URL will be empty. The encoding passed to `Reader::open` will take effect only when there is no encoding information in the original document, i.e., the encoding information obtained from the (XML) `buffer` trumps all. If there is no encoding provided within the document and `encoding` is null or a blank string is passed, then set the encoding to the default "UTF‐8". It is an error to `open` a reader that is already open. Note that the reader will not be on a valid node until `advanceToNextNode` is called.

== Synopsis

Declared in `<balxml_minireader.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
int
open(
    char const* buffer,
    std::size_t size,
    char const* url = 0,
    char const* encoding = 0) override;
----


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