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Several Xapian methods use `std::string' to represent opaque binary
blobs. SWIG treats these as UTF-8 strings and converts them to an SCM
representation via `scm_from_utf8_string', which will throw an error
if the input is not valid UTF-8.
This commit updates the SWIG interface file to add wrappers taking or
returning bytevectors instead of strings for Xapian methods dealing
with document values and bodies.
* xapian.i.in (SWIG_bytevector, typemap_in_SWIG_bytevector,
typemap_out_SWIG_bytevector): Add machinery for defining
bytevector-variant wrappers of existing methods taking or returning
std::string.
* (Xapian::ValueIterator::get_value_bytes,
Xapian::Document::get_value_bytes, Xapian::Document::add_value_bytes,
Xapian::Document::get_data_bytes, Xapian::Document::set_data_bytes,
Xapian::Database::get_metadata_bytes,
Xapian::WritableDatabase::set_metadata_bytes,
Xapian::Query::Query): Add bytevector variants of methods.
Signed-off-by: Arun Isaac <arunisaac@systemreboot.net>
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