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// file : cutl/xml/serializer.cxx
// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <new> // std::bad_alloc
#include <cstring> // std::strlen
#include <cutl/xml/serializer.hxx>
using namespace std;
namespace cutl
{
namespace xml
{
// serialization
//
serialization::
~serialization () throw () {}
serialization::
serialization (const string& n, const string& d)
: name_ (n), description_ (d)
{
init ();
}
serialization::
serialization (const serializer& s, const std::string& d)
: name_ (s.output_name ()), description_ (d)
{
init ();
}
void serialization::
init ()
{
if (!name_.empty ())
{
what_ += name_;
what_ += ": ";
}
what_ += "error: ";
what_ += description_;
}
char const* serialization::
what () const throw ()
{
return what_.c_str ();
}
// serializer
//
extern "C" genxStatus
genx_write (void* p, constUtf8 us)
{
// It would have been easier to throw the exception directly,
// however, the Genx code is most likely not exception safe.
//
ostream* os (static_cast<ostream*> (p));
const char* s (reinterpret_cast<const char*> (us));
os->write (s, static_cast<streamsize> (strlen (s)));
return os->good () ? GENX_SUCCESS : GENX_IO_ERROR;
}
extern "C" genxStatus
genx_write_bound (void* p, constUtf8 start, constUtf8 end)
{
ostream* os (static_cast<ostream*> (p));
const char* s (reinterpret_cast<const char*> (start));
streamsize n (static_cast<streamsize> (end - start));
os->write (s, n);
return os->good () ? GENX_SUCCESS : GENX_IO_ERROR;
}
extern "C" genxStatus
genx_flush (void* p)
{
ostream* os (static_cast<ostream*> (p));
os->flush ();
return os->good () ? GENX_SUCCESS : GENX_IO_ERROR;
}
serializer::
~serializer ()
{
if (s_ != 0)
genxDispose (s_);
}
serializer::
serializer (ostream& os, const string& oname, unsigned short ind)
: os_ (os), os_state_ (os.exceptions ()), oname_ (oname), depth_ (0)
{
// Temporarily disable exceptions on the stream.
//
os_.exceptions (ostream::goodbit);
// Allocate the serializer. Make sure nothing else can throw after
// this call since otherwise we will leak it.
//
s_ = genxNew (0, 0, 0);
if (s_ == 0)
throw bad_alloc ();
genxSetUserData (s_, &os_);
if (ind != 0)
genxSetPrettyPrint (s_, ind);
sender_.send = &genx_write;
sender_.sendBounded = &genx_write_bound;
sender_.flush = &genx_flush;
if (genxStatus e = genxStartDocSender (s_, &sender_))
{
string m (genxGetErrorMessage (s_, e));
genxDispose (s_);
throw serialization (oname, m);
}
}
void serializer::
handle_error (genxStatus e)
{
switch (e)
{
case GENX_ALLOC_FAILED:
throw bad_alloc ();
case GENX_IO_ERROR:
// Restoring the original exception state should trigger the
// exception. If it doesn't (e.g., because the user didn't
// configure the stream to throw), then fall back to the
// serialiation exception.
//
os_.exceptions (os_state_);
// Fall through.
default:
throw serialization (oname_, genxGetErrorMessage (s_, e));
}
}
void serializer::
start_element (const string& ns, const string& name)
{
if (genxStatus e = genxStartElementLiteral (
s_,
reinterpret_cast<constUtf8> (ns.empty () ? 0 : ns.c_str ()),
reinterpret_cast<constUtf8> (name.c_str ())))
handle_error (e);
depth_++;
}
void serializer::
end_element ()
{
if (genxStatus e = genxEndElement (s_))
handle_error (e);
// Call EndDocument() if we are past the root element.
//
if (--depth_ == 0)
{
if (genxStatus e = genxEndDocument (s_))
handle_error (e);
// Also restore the original exception state on the stream.
//
os_.exceptions (os_state_);
}
}
void serializer::
start_attribute (const string& ns, const string& name)
{
if (genxStatus e = genxStartAttributeLiteral (
s_,
reinterpret_cast<constUtf8> (ns.empty () ? 0 : ns.c_str ()),
reinterpret_cast<constUtf8> (name.c_str ())))
handle_error (e);
}
void serializer::
end_attribute ()
{
if (genxStatus e = genxEndAttribute (s_))
handle_error (e);
}
void serializer::
attribute (const string& ns,
const string& name,
const string& value)
{
if (genxStatus e = genxAddAttributeLiteral (
s_,
reinterpret_cast<constUtf8> (ns.empty () ? 0 : ns.c_str ()),
reinterpret_cast<constUtf8> (name.c_str ()),
reinterpret_cast<constUtf8> (value.c_str ())))
handle_error (e);
}
void serializer::
characters (const string& value)
{
if (genxStatus e = genxAddCountedText (
s_,
reinterpret_cast<constUtf8> (value.c_str ()),
static_cast<int> (value.size ())))
handle_error (e);
}
void serializer::
namespace_decl (const string& ns, const string& p)
{
if (genxStatus e = ns.empty () && p.empty ()
? genxUnsetDefaultNamespace (s_)
: genxAddNamespaceLiteral (
s_,
reinterpret_cast<constUtf8> (ns.c_str ()),
reinterpret_cast<constUtf8> (p.c_str ())))
handle_error (e);
}
void serializer::
xml_decl (const string& ver, const string& enc, const string& stl)
{
if (genxStatus e = genxXmlDeclaration (
s_,
reinterpret_cast<constUtf8> (ver.c_str ()),
(enc.empty () ? 0 : reinterpret_cast<constUtf8> (enc.c_str ())),
(stl.empty () ? 0 : reinterpret_cast<constUtf8> (stl.c_str ()))))
handle_error (e);
}
bool serializer::
lookup_namespace_prefix (const string& ns, string& p)
{
// Currently Genx will create a namespace mapping if one doesn't
// already exist.
//
genxStatus e;
genxNamespace gns (
genxDeclareNamespace (
s_, reinterpret_cast<constUtf8> (ns.c_str ()), 0, &e));
if (e != GENX_SUCCESS)
handle_error (e);
p = reinterpret_cast<const char*> (genxGetNamespacePrefix (gns));
return true;
}
}
}
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