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|
// -*- C++ -*-
#include "tao/AnyTypeCode/Null_RefCount_Policy.h"
#include "tao/AnyTypeCode/Alias_TypeCode_Static.h"
#include "tao/AnyTypeCode/Value_TypeCode_Static.h"
#include "tao/AnyTypeCode/TypeCode_Constants.h"
#include "tao/Valuetype/ValueBase.h"
#include "tao/Valuetype/ValueFactory.h"
#include "tao/CDR.h"
#include "tao/ORB.h"
#include "tao/ORB_Core.h"
#include "tao/debug.h"
#include "tao/SystemException.h"
#include "ace/OS_NS_string.h"
#if !defined (__ACE_INLINE__)
# include "tao/Valuetype/ValueBase.inl"
#endif /* ! __ACE_INLINE__ */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
// Static operations in namespace CORBA.
void
CORBA::add_ref (CORBA::ValueBase *val)
{
if (val)
{
val->_add_ref ();
}
}
void
CORBA::remove_ref (CORBA::ValueBase *val)
{
if (val)
{
val->_remove_ref ();
}
}
// ***********************************************************************
TAO_ChunkInfo::TAO_ChunkInfo (CORBA::Boolean do_chunking,
CORBA::Long init_level)
: chunking_(do_chunking),
value_nesting_level_(init_level),
chunk_size_pos_ (0),
length_to_chunk_octets_pos_ (0),
chunk_octets_end_pos_ (0)
{
}
CORBA::ValueBase *
CORBA::ValueBase::_copy_value (void)
{
// Note that TAO traditionally has not enforced this functions PURE
// virtual nature, thus the end user didn't have to provide an
// implimentaion of _copy_value in their top level valuetype class
// that deriveds from the tao_idl generated OBV_* class. If they do
// not use _copy_value() then there was no requirement to impliment it.
// However as an option TAO can now be built to use _copy_value when
// inserting a copy of the valuetype into an any, instead of increasing
// it's referance count. It is now possiable that older code may end up
// here in error due to the lack of a user's override.
ACE_VERSIONED_NAMESPACE_NAME::__ace_assert (
__FILE__,
__LINE__,
ACE_TEXT_CHAR_TO_TCHAR ("Valuetype's _copy_value() should be implimented in user's most derived class"));
return 0;
}
CORBA::ValueBase::ValueBase (void)
: is_truncatable_(0),
chunking_(0)
{
}
CORBA::ValueBase::ValueBase (const ValueBase& val)
: is_truncatable_ (val.is_truncatable_),
chunking_ (val.chunking_)
{
}
CORBA::ValueBase::~ValueBase (void)
{
}
CORBA::ValueBase*
CORBA::ValueBase::_downcast (CORBA::ValueBase *vt)
{
// Every vt is a CORBA::ValueBase :-).
return vt;
}
void
CORBA::ValueBase::_tao_any_destructor (void *x)
{
CORBA::ValueBase *tmp = static_cast<CORBA::ValueBase *> (x);
CORBA::remove_ref (tmp);
}
// OBV marshaling in principle:
// _tao_marshal () is called from the CDR operator<< ()
// to marshal a valuetype. To marshal the state
// it calls (virtual) _tao_marshal_v () (IDL generated) on itself
// which 'jumps' to the most derived valuetype class. This function
// further calls (inline) _tao_marshal_state, which is generated from
// IDL too and does the marshaling of state members and base classes
// (before, if any) actually.
// Fragmentation (chunking) needs some cooperation with the CDR stream.
// It needs to keep track of the state we're in:
// (outside chunk, beginning of chunk - no data, inside chunk and
// the nesting level of valuetypes. (The chunks itself are not nested.))
// (see CORBA 2.3 GIOP 15.3.4)
// %! yet much to do ... look for +++ !
// 1. Is 'this' yet marshalled ? (->1a)
// If not then mark 'this' as marshalled. (->2) +++
// Or is it null ? (write null_ref and return ok)
// 1a. Put indirection and return successfull.
// 2. if (chunking) and we are in a chunk (look in strm),
// end the chunk by writing its length at its start.
// This is the responsibility of the CDR stream.
// But if nothing is writtern in this chunk yet,
// we want to overwrite the place of the dummy blocksize-tag
// with our <value-tag>.
// Increase the nesting level of valuetypes.
// 3. Build <value-tag>, which states if chunking is used
// and if type information ((list of) repository id(s))
// is provided. The latter is necessary if the formal_type_id
// is unequal the 'true derived' type of this object.
// 4. Marshal type information.
// 5. if (chunking) let room for a blocksize-tag. (i.e. write Long)
// 6. Now marshal state members. (%! Problem when state is empty
// and chunked encoding is used.)
// 7. if (chunking) let strm overwrite the last blocksize tag
// with its concrete value.
// 8. if (chunking) write an end tag, or (optimization) let the CDR
// care for collecting all end tags of nested values (e.g. linked
// list), so that only one end tag at all must be written.
CORBA::Boolean
CORBA::ValueBase::_tao_marshal (TAO_OutputCDR &strm,
const CORBA::ValueBase *this_,
ptrdiff_t formal_type_id)
{
if ( ! _tao_write_special_value (strm, this_))
{
return _tao_write_value (strm, this_, formal_type_id);
}
else
return 1;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal (TAO_InputCDR &strm,
CORBA::ValueBase *&new_object)
{
// This is for the special case only that one unmarshals in order
// to assign the newly created object directly to a ValueBase pointer.
// Implementation is like a specialized one (in TC.cpp, if T.idl is source).
// basically do:
// ValueBase::_tao_unmarshal_pre ()
// (Gets factory or possible a null or an existing object.
// Then the job is done. On an existing (backreferenced) object
// do a cast and a type check)
// new_object = factory->create_for_unmarshal ()
// (with apropriate cast)
// new_object->_tao_unmarshal_v ()
// new_object->_tao_unmarshal_post ()
CORBA::Boolean
is_null_object = false,
is_indirected = false;
if (!CORBA::ValueBase::_tao_unmarshal_pre (
strm,
new_object,
0, // repo_id to be obtained from strm
is_null_object,
is_indirected ))
{
return false;
}
if (is_null_object || is_indirected)
{
return true;
}
// If we have now obtained the ValueType
// continue by unmarshalling the values into it.
return (new_object) ?
new_object->_tao_unmarshal_v (strm) : false;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_pre (
TAO_InputCDR &strm,
CORBA::ValueBase *&valuetype,
const char *const fallback_repo_id,
CORBA::Boolean &is_null_object,
CORBA::Boolean &is_indirected)
{
// %! yet much to do ... look for +++ !
// 1. Get the <value-tag> (else it may be <indirection-tag> or <null-ref>).
// Is object yet unmarshalled (<indirection-tag> is set) ? (->1a)
// Is <null-ref> given ? Set 0 and return ok.
// 1a. Lookup the real address in memory, which should be aligned +++
// to CORBA::ValueBase. Its possible at this point that worse
// type mismatch gets by undetected, if the CDR stream fakes.
// So the type should be checked ... +++
// 2. Now at this point it must be a <value-tag> (error else).
// if (chunking) check that any last chunk ends with matching
// size. If not raise marshal exception.
// Increase the nesting level of valuetypes.
// 3. if (chunking) read and record the blocksize-tag.
// 4. Unmarshal type information and lookup factory.
// If no type information is given in the CDR encoding, as told
// from the <value-tag>, then use the repository id parameter
// (it _must_ be right).
CORBA::Boolean is_chunked = false;
// Save the position of the start of the ValueType
// to allow caching for later indirection.
if (strm.align_read_ptr (ACE_CDR::LONG_SIZE))
{
return false;
}
void *const start_of_valuetype = strm.rd_ptr();
Repository_Id_List ids;
CORBA::Boolean result =
CORBA::ValueBase::_tao_unmarshal_header (
strm, fallback_repo_id, ids,
is_null_object, is_indirected, is_chunked);
if (!result || is_null_object)
{
valuetype = 0;
return result;
}
if (is_indirected)
{
return _tao_unmarshal_value_indirection (strm, valuetype);
}
CORBA::ValueBase::_tao_unmarshal_find_factory (
strm, start_of_valuetype, valuetype, ids, is_chunked);
return true;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_header (
TAO_InputCDR &strm,
const char *const fallback_repo_id,
Repository_Id_List &ids,
CORBA::Boolean &is_null_object,
CORBA::Boolean &is_indirected,
CORBA::Boolean &is_chunked)
{
is_indirected = false;
is_null_object = false;
is_chunked = false;
CORBA::Long valuetag;
if (!strm.read_long (valuetag))
{
return false;
}
is_chunked = TAO_OBV_GIOP_Flags::is_chunked (valuetag);
if (TAO_OBV_GIOP_Flags::is_null_ref (valuetag))
{
// null reference is unmarshalled.
is_null_object = true;
return true;
}
if (TAO_OBV_GIOP_Flags::is_indirection_tag (valuetag))
{
// value is redirected
is_indirected = true;
return true;
}
if (TAO_OBV_GIOP_Flags::has_codebase_url (valuetag))
{
// We don't do anything with this url, but it needs
// to be read and ignored.
ACE_CString codebase_url;
if (!_tao_read_codebase_url (strm, codebase_url))
{
return false;
}
}
// Obtain the repo_id(s) of the type we are reading
if (TAO_OBV_GIOP_Flags::has_single_type_info (valuetag))
{
ACE_CString id;
if (!_tao_read_repository_id(strm, id))
{
return false;
}
ids.push_back (id);
}
else if (TAO_OBV_GIOP_Flags::has_list_type_info (valuetag))
{
if (!_tao_read_repository_id_list(strm, ids))
{
return false;
}
}
else if (TAO_OBV_GIOP_Flags::has_no_type_info (valuetag))
{
if (fallback_repo_id)
{
ids.push_back (fallback_repo_id);
}
else
{
TAOLIB_ERROR ((
LM_ERROR,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_pre, ")
ACE_TEXT ("unknown repo_id\n") ));
return false;
}
}
else
{
if (TAO_debug_level)
{
TAOLIB_ERROR ((
LM_ERROR,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_pre, ")
ACE_TEXT ("unknown value tag: %x\n"),
valuetag ));
}
return false;
}
return true;
}
void
CORBA::ValueBase::_tao_unmarshal_find_factory (
TAO_InputCDR &strm,
void *const start_of_valuetype,
CORBA::ValueBase *&valuetype,
Repository_Id_List &ids,
CORBA::Boolean &is_chunked)
{
valuetype = 0;
TAO_ORB_Core *orb_core = strm.orb_core ();
if (!orb_core)
{
orb_core = TAO_ORB_Core_instance ();
if (TAO_debug_level)
{
TAOLIB_DEBUG ((
LM_WARNING,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_find_factory, ")
ACE_TEXT ("WARNING: extracting valuetype using default ORB_Core\n") ));
}
}
// Find the registered factory for this unmarshalling valuetype. If any
// factory for the valuetype in its truncatable derivation hierarchy
// is registered, the factory is used to create value for unmarshalling.
// Value factories are reference counted. When we get a new value factory
// from the ORB, its reference count is increased.
CORBA::ValueFactory_var factory;
CORBA::Boolean requires_truncation = false;
const CORBA::ULong num_ids = ids.size ();
const char *id = (num_ids) ? ids[0].c_str () : "{Null}";
for (CORBA::ULong i = 0u; i < num_ids; ++i)
{
factory = orb_core->orb ()->lookup_value_factory (ids[i].c_str ());
if (factory.in() != 0)
{
id = ids[i].c_str ();
requires_truncation = (i != 0u);
break;
}
}
// Obtain the actual ValueType from the factory
if (factory.in() == 0 || !(valuetype = factory->create_for_unmarshal ()))
{
if (TAO_debug_level)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_find_factory, ")
ACE_TEXT ("OBV factory is null, id=%C\n"),
id));
}
throw ::CORBA::MARSHAL (CORBA::OMGVMCID | 1, CORBA::COMPLETED_MAYBE);
}
if (requires_truncation)
{
valuetype->truncation_hook ();
}
valuetype->chunking_ = is_chunked;
// Cache the start of this ValueType for later possiable indirection
VERIFY_MAP (TAO_InputCDR, value_map, Value_Map);
if (strm.get_value_map ()->get()->bind (start_of_valuetype, valuetype) != 0)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_find_factory, ")
ACE_TEXT ("Failed to bound value %x=%x, id=%C\n"),
start_of_valuetype, valuetype, id ));
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_find_factory, ")
ACE_TEXT ("bound value %x=%x, id=%C\n"),
start_of_valuetype, valuetype, id ));
}
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_post (TAO_InputCDR &)
{
// (... called from T::_tao_unmarshal)
// 7. if (chunking) check the last blocksize tag for correct value. +++
// And if we're gonna to truncate, skip all the state of the more
// derived classes. (But it might need to be accessed again,
// if there are embedded objects which are referenced later
// in this CDR encoding stream.)
// 8. if (chunking) there must be some end tag. Let the CDR stream deal
// with this (and decrease the nesting level of valuetypes).
// Also the CDR stream must check for eventually outstanding end tags
// at the end of the stream which have to cause a marshal
// exception there.
return true;
}
CORBA::Boolean
CORBA::ValueBase::_tao_validate_box_type (TAO_InputCDR &strm,
TAO_InputCDR &indirected_strm,
const char * const repo_id_expected,
CORBA::Boolean & null_object,
CORBA::Boolean & is_indirected)
{
CORBA::Long value_tag;
null_object = false;
is_indirected = false;
if (!strm.read_long (value_tag))
{
return false;
}
if (TAO_OBV_GIOP_Flags::is_null_ref (value_tag))
{ // ok, null reference unmarshaled
null_object = true;
return true;
}
if (TAO_OBV_GIOP_Flags::is_indirection_tag (value_tag))
{
is_indirected = true;
// box value is redirected.
return _tao_unmarshal_value_indirection_pre (strm, indirected_strm);
}
if (!TAO_OBV_GIOP_Flags::is_value_tag (value_tag))
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l CORBA::ValueBase::_tao_validate_box_type, ")
ACE_TEXT ("not value_tag\n")));
return false;
}
if (TAO_OBV_GIOP_Flags::has_codebase_url (value_tag))
{ // Demarshal the codebase url (but we won't be using it).
ACE_CString codebase_url;
if (! _tao_read_codebase_url (strm, codebase_url))
{
return false;
}
}
if (TAO_OBV_GIOP_Flags::has_no_type_info (value_tag))
{
// No type information so assume it is the correct type.
return true;
}
if (TAO_OBV_GIOP_Flags::has_single_type_info (value_tag))
{
// Demarshal the repository id and check if it is the expected one.
ACE_CString id;
if (! _tao_read_repository_id (strm, id))
{
return false;
}
if (!ACE_OS::strcmp (id.c_str(), repo_id_expected))
{ // Repository ids matched as expected
return true;
}
}
if (TAO_OBV_GIOP_Flags::has_list_type_info (value_tag))
{
// Don't know how to handle a repository id list. It does not
// make sense for a value box anyway.
return false;
}
return false;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_value_indirection_pre (TAO_InputCDR &strm,
TAO_InputCDR &indirected_strm)
{
CORBA::Long offset = 0;
if (!strm.read_long (offset) || offset >= 0)
{
return false;
}
size_t const buffer_size = -(offset) + sizeof (CORBA::Long);
// Cribbed from tc_demarshal_indirection in Typecode_CDR_Extraction.cpp
indirected_strm = TAO_InputCDR (strm.rd_ptr () + offset - sizeof (CORBA::Long),
buffer_size,
strm.byte_order ());
indirected_strm.set_repo_id_map (strm.get_repo_id_map ());
indirected_strm.set_codebase_url_map (strm.get_codebase_url_map ());
indirected_strm.set_value_map (strm.get_value_map ());
return indirected_strm.good_bit ();
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_value_indirection (TAO_InputCDR &strm,
CORBA::ValueBase *&value)
{
if (strm.get_value_map().is_nil ())
throw CORBA::INTERNAL ();
CORBA::Long offset = 0;
if (!strm.read_long (offset) || offset >= 0)
{
return 0;
}
void* pos = strm.rd_ptr () + offset - sizeof (CORBA::Long);
if (9 < TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) ValueBase::_tao_unmarshal_value_indirection, pos %x\n"), pos));
TAO_InputCDR::Value_Map* map = strm.get_value_map()->get ();
for (TAO_InputCDR::Value_Map::ITERATOR it = map->begin (); it != map->end (); ++ it)
{
TAOLIB_DEBUG ((LM_DEBUG, ACE_TEXT ("TAO (%P|%t) ValueBase::_tao_unmarshal_value_indirection, %x=%x\n"), it->ext_id_, it->int_id_));
}
}
void * v = 0;
if (strm.get_value_map()->get()->find (pos, v) != 0)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ")
ACE_TEXT ("ValueBase::_tao_unmarshal_value_indirection, ")
ACE_TEXT ("did not find %x in map %x\n"),
pos, (void *) strm.get_value_map()->get()));
throw CORBA::INTERNAL ();
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_value_indirection, found %x=%x\n"),
pos,v));
}
value = reinterpret_cast<CORBA::ValueBase *>(v);
return true;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_repo_id_indirection (TAO_InputCDR &strm,
ACE_CString& id)
{
CORBA::Long offset = 0;
if (!strm.read_long (offset) || offset >= 0)
{
return false;
}
void* pos = strm.rd_ptr () + offset - sizeof (CORBA::Long);
if (strm.get_repo_id_map()->get()->find (pos, id) != 0)
{
throw CORBA::INTERNAL ();
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_repo_id_indirection, found %x=%C\n"),
pos, id.c_str ()));
}
return 1;
}
CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_codebase_url_indirection (TAO_InputCDR &strm,
ACE_CString& codebase_url)
{
CORBA::Long offset = 0;
if (!strm.read_long (offset) || offset >= 0)
{
return false;
}
void* pos = strm.rd_ptr () + offset - sizeof (CORBA::Long);
if (strm.get_codebase_url_map()->get()->find (pos, codebase_url) != 0)
{
throw CORBA::INTERNAL ();
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_codebase_url_indirection, found %x=%C\n"),
pos, codebase_url.c_str ()));
}
return 1;
}
#if defined (GEN_OSTREAM_OPS)
std::ostream &
CORBA::ValueBase::_tao_stream (std::ostream &strm,
const CORBA::ValueBase *value)
{
return value->_tao_stream_v (strm);
}
std::ostream &
CORBA::ValueBase::_tao_stream_v (std::ostream &strm) const
{
return strm << "CORBA::ValueBase";
}
#endif /* GEN_OSTREAM_OPS */
// =================== methods for chunking ====================
CORBA::Boolean
CORBA::ValueBase::_tao_write_special_value (TAO_OutputCDR &strm,
const CORBA::ValueBase *value)
{
// If the 'value' is null then write the null value to the stream.
if (value == 0)
{
return strm.write_long (TAO_OBV_GIOP_Flags::Null_tag);
}
else
{
#ifdef TAO_HAS_VALUETYPE_OUT_INDIRECTION
// value indirection
VERIFY_MAP (TAO_OutputCDR, value_map, Value_Map);
char* pos = 0;
if (strm.get_value_map ()->get()->find (
reinterpret_cast<void*>(const_cast <CORBA::ValueBase *> (value)), pos) == 0)
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t)ValueBase::_tao_write_special_value, found value %x=%x\n"),
value, pos));
}
if (!strm.write_long (TAO_OBV_GIOP_Flags::Indirection_tag))
{
return false;
}
CORBA::Long const offset= -strm.offset (pos);
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_write_special_value, indirection %d=%x\n"),
offset, (void *)(strm.current()->wr_ptr () + offset) ));
}
return strm.write_long (offset);
}
else {
if (strm.align_write_ptr (ACE_CDR::LONG_SIZE) != 0)
{
throw CORBA::INTERNAL ();
}
if (strm.get_value_map ()->get()->bind (
reinterpret_cast<void*>(const_cast <CORBA::ValueBase *> (value)),
strm.current()->wr_ptr() ) != 0)
{
throw CORBA::INTERNAL ();
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_marshal, bound value %x=%x\n"),
value, strm.current()->wr_ptr()));
}
return false;
}
#endif
return false;
}
}
CORBA::Boolean
CORBA::ValueBase::_tao_write_value (TAO_OutputCDR &strm,
const CORBA::ValueBase * value,
ptrdiff_t formal_type_id)
{
if (! value->_tao_write_value_header (strm, formal_type_id))
{
return false;
}
if (! value->_tao_marshal_v (strm))
{
return false;
}
return true;
}
CORBA::Boolean
CORBA::ValueBase::_tao_write_value_header (TAO_OutputCDR &strm,
ptrdiff_t formal_type_id) const
{
#ifdef TAO_HAS_OPTIMIZED_VALUETYPE_MARSHALING
// this case allows TAO to avoid marshaling the typeID for values
// where the actual type matches the formal type (ie not a derived
// type).
//
// I would much prefer that there be a way to have a -ORB option to
// control this behavior, but for now there is no reference to the
// ORB Core available during marshaling (there is during unmarshaling)
// and no other way to communicate such configuration values.
CORBA::Boolean const is_formal_type =
this->_tao_match_formal_type (formal_type_id);
#else
// Unfortunately, all versions of tao prior to TAO 1.5.2 did not
// support unmarshaling of valuetypes that did not explicitly
// marshal the type id. At least it is benign to always encode the
// typecode value, even if it can be a little verbose.
CORBA::Boolean const is_formal_type = 0;
ACE_UNUSED_ARG (formal_type_id);
#endif /* TAO_HAS_OPTIMIZED_VALUETYPE_MARSHALING */
// Get the list of repository ids for this valuetype.
Repository_Id_List repository_ids;
this->_tao_obv_truncatable_repo_ids (repository_ids);
CORBA::Long const num_ids =
static_cast <CORBA::Long> (repository_ids.size ());
// Build <value-tag>, which states if chunking is used
// and if type information ((list of) repository id(s))
// is provided. The latter is necessary if the formal_type_id
// is unequal the 'true derived' type of this object.
CORBA::Long valuetag = TAO_OBV_GIOP_Flags::Value_tag_base;
// Truncatable value type, must use chunking and list all repository
// ids in its "truncatable" derivation hierarchy.
if (this->is_truncatable_ || this->chunking_)
valuetag |= TAO_OBV_GIOP_Flags::Chunking_tag_sigbits;
if (!is_formal_type || this->is_truncatable_)
valuetag |= TAO_OBV_GIOP_Flags::Type_info_single;
if (num_ids > 1)
{
valuetag |= TAO_OBV_GIOP_Flags::Type_info_list;
}
if (! strm.write_long (valuetag) // Write <value-tag>.
|| (num_ids > 1 && !strm.write_long (num_ids))) // Write <num-ids>.
{
return false;
}
#ifndef TAO_HAS_OPTIMIMIZED_VALUETYPE_MARSHALING
if (this->is_truncatable_
|| !is_formal_type /* Always evaluates to 1 in the
!TAO_HAS_OPTIMIMIZED_VALUETYPE_MARSHALING
case */
|| num_ids > 1)
{
#endif /* !TAO_HAS_OPTIMIMIZED_VALUETYPE_MARSHALING */
// Marshal type information.
for (CORBA::Long i = 0; i < num_ids; ++i )
{
if (! _tao_write_repository_id (strm, repository_ids[i]))
{
return false;
}
}
#ifndef TAO_HAS_OPTIMIMIZED_VALUETYPE_MARSHALING
}
#endif /* !TAO_HAS_OPTIMIMIZED_VALUETYPE_MARSHALING */
return true;
}
CORBA::Boolean
CORBA::ValueBase::_tao_write_repository_id (TAO_OutputCDR &strm,
ACE_CString& id)
{
#ifdef TAO_HAS_VALUETYPE_OUT_INDIRECTION
VERIFY_MAP (TAO_OutputCDR, repo_id_map, Repo_Id_Map);
char* pos = 0;
if (strm.get_repo_id_map ()->get()->find (id, pos) == 0)
{
if (!strm.write_long (TAO_OBV_GIOP_Flags::Indirection_tag))
{
return false;
}
CORBA::Long offset= -strm.offset (pos);
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_write_repository_id, id %C indirection %d\n"),
id.c_str(), offset));
}
if (!strm.write_long (offset))
{
return false;
}
}
else
{
if (strm.align_write_ptr (ACE_CDR::LONG_SIZE) != 0)
{
throw CORBA::INTERNAL ();
}
if (strm.get_repo_id_map ()->get ()->bind (id, strm.current()->wr_ptr ()) != 0)
{
throw CORBA::INTERNAL ();
}
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_write_repository_id, bound %C - %x\n"),
id.c_str (), strm.current()->wr_ptr ()));
}
if (! strm.write_string (id.c_str ()))
{
return false;
}
}
#else
if (! strm.write_string (id.c_str ()))
{
return 0;
}
#endif
return 1;
}
// this method is called by the IDL generated _tao_marshal_state() method.
CORBA::Boolean
TAO_ChunkInfo::start_chunk(TAO_OutputCDR &strm)
{
// If chunking, reserve the space for the chunk size of next chunk
// and increase the nesting level.
if (this->chunking_)
{
if (! reserve_chunk_size(strm))
{
return false;
}
++this->value_nesting_level_;
}
return true;
}
// this method is called by the IDL generated _tao_marshal_state() method.
CORBA::Boolean
TAO_ChunkInfo::end_chunk(TAO_OutputCDR &strm)
{
if (this->chunking_)
{
// Write actual chunk size at the reserved chunk size place.
if (! this->write_previous_chunk_size(strm))
{
return false;
}
// Write an end tag which is negation of value_nesting_level_.
if (! strm.write_long(- this->value_nesting_level_))
{
return false;
}
// -- this->value_nesting_level_;
if ( -- this->value_nesting_level_ == 0 )
{
// ending chunk for outermost value
this->chunking_ = 0;
}
}
return true;
}
CORBA::Boolean
TAO_ChunkInfo::write_previous_chunk_size(TAO_OutputCDR &strm)
{
if (this->chunk_size_pos_ != 0)
{
// Calculate the chunk size.
CORBA::Long const chunk_size = strm.total_length () - this->length_to_chunk_octets_pos_;
// This should not happen since this is called in end_chunk() and
// the idl generated code always have the matched start_chunk() and
// end_chunk() pair. There is always data written to the stream between
// the start_chunk() and end_chunk() calls.
if (chunk_size == 0)
{
return false;
}
// Write the actual chunk size to the reserved chunk size position
// in the stream.
if (!strm.replace (chunk_size, this->chunk_size_pos_))
{
return false;
}
// We finish writing the actual chunk size, now we need reset the state.
this->chunk_size_pos_ = 0;
this->length_to_chunk_octets_pos_ = 0;
}
return true;
}
CORBA::Boolean
TAO_ChunkInfo::reserve_chunk_size(TAO_OutputCDR &strm)
{
// This is called in the start_chunk().
// Reserve the chunk size the first time the start_chunk () is called
// if there are several start_chunk () called continuously without
// calling end_chunk (). This could happen in the _tao_marshal_state()
// in the most derived valuetype.
if (this->chunk_size_pos_ == 0)
{
// Align the wr_ptr before we reserve the space for chunk size.
strm.align_write_ptr (ACE_CDR::LONG_SIZE);
// Remember begin of the chunk (at chunk size position) that is needed
// when we write back actual chunk size to the stream.
this->chunk_size_pos_ = strm.current ()->wr_ptr ();
// Insert four bytes here as a place-holder, we need to go back
// later and write the actual size.
if (! strm.write_long (0))
{
return 0;
}
// Remember length before writing chunk data. This is used to calculate
// the actual size of the chunk.
this->length_to_chunk_octets_pos_ = strm.total_length ();
}
return 1;
}
CORBA::Boolean
TAO_ChunkInfo::handle_chunking (TAO_InputCDR &strm)
{
if (!this->chunking_)
{
return 1;
}
char* the_rd_ptr = strm.start()->rd_ptr ();
//This case could happen if a handle_chunking() reads a chunk size
//and then calls the handle_chunking() again without reading the chunk data.
//The handle_chunking() called continuously without reading the chunk data
//only happens at the beginning of _tao_unmarshal_state() in a valuetype
//that has parents.
if (the_rd_ptr < this->chunk_octets_end_pos_)
{
++this->value_nesting_level_;
return 1;
}
//Safty check if reading is out of range of current chunk.
if (this->chunk_octets_end_pos_ != 0
&& the_rd_ptr > this->chunk_octets_end_pos_)
{
return 0;
}
// Read a long value that might be an endtag, the chunk size or the value tag
// of the nested valuetype.
CORBA::Long tag;
if (!strm.read_long (tag))
{
return 0;
}
if (tag < 0)
{
// tag is an end tag
if (-tag > this->value_nesting_level_)
{
TAOLIB_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("TAO (%P|%t) - %N:%l TAO_ChunkInfo::handle_chunking, received end tag ")
ACE_TEXT ("%d > value_nesting_level %d\n"),
-tag,
this->value_nesting_level_),
0);
}
this->value_nesting_level_ = - tag;
--this->value_nesting_level_;
this->chunk_octets_end_pos_ = 0;
// Continue reading so that we can read the outmost endtag. This
// would simplify the implementation in the derived valuetype.
if (this->value_nesting_level_ > 0)
{
this->handle_chunking(strm);
}
}
else if (tag < TAO_OBV_GIOP_Flags::Value_tag_base)
{
// Read the chunk size of another chunk.
this->chunk_octets_end_pos_ = strm.rd_ptr () + tag;
++this->value_nesting_level_;
}
else // (tag >= 0x7fffff00)
{
// This should not happen since the valuetag of the nested
// values are always unmarshalled in the
// ValueBase::_tao_unmarshal_pre().
return 0;
}
return 1;
}
CORBA::Boolean
TAO_ChunkInfo::skip_chunks (TAO_InputCDR &strm)
{
if (!this->chunking_)
{
return 1;
}
// This function is called after reading data of the truncated parent and
// skips the remaining chunks until the outmost endtag (-1).
// The tag read here is suppoused to be an endtag.
CORBA::Long tag;
if (!strm.read_long(tag))
{
return 0;
}
// end of the whole valuetype.
if (tag == -1)
{
return 1;
}
else if (tag < 0)
{
// continue skip the chunk.
return this->skip_chunks (strm);
}
else if (tag < TAO_OBV_GIOP_Flags::Value_tag_base)
{
// Read the chunk size and move forward to skip the data.
ACE_Message_Block* current =
const_cast<ACE_Message_Block*>(strm.start ());
current->rd_ptr (tag);
return this->skip_chunks (strm);
}
else
return 0;
}
CORBA::Boolean
CORBA::ValueBase::_tao_read_repository_id_list (TAO_InputCDR& strm,
Repository_Id_List& ids)
{
CORBA::Long num_ids = 0;
if (!strm.read_long (num_ids))
{
return 0;
}
if (num_ids == TAO_OBV_GIOP_Flags::Indirection_tag)
{
// Multiple repo id is not indirected.
return 0;
}
else
{
for (CORBA::Long i = 0; i < num_ids; ++i)
{
ACE_CString id;
if (!_tao_read_repository_id (strm, id))
{
return 0;
}
ids.push_back (id);
}
}
return 1;
}
CORBA::Boolean
CORBA::ValueBase::_tao_read_repository_id (TAO_InputCDR& strm,
ACE_CString& id)
{
CORBA::ULong length = 0;
size_t buffer_size = strm.length();
if (!strm.read_ulong (length))
{
return 0;
}
VERIFY_MAP (TAO_InputCDR, repo_id_map, Repo_Id_Map);
char * pos = strm.rd_ptr();
// 'length' may not be the repo id length - it could be the
// FFFFFFF indirection marker instead. If it is an indirection marker, we
// get the offset following the indirection marker, otherwise we can follow
// the same logic using the offset to simply rewind to the start of length
// and re-read the length as part of the string
if (TAO_OBV_GIOP_Flags::is_indirection_tag (length))
{
return _tao_unmarshal_repo_id_indirection (strm, id);
}
pos -= sizeof (CORBA::ULong);
// Cribbed from tc_demarshal_indirection in Typecode_CDR_Extraction.cpp
TAO_InputCDR id_stream (pos,
buffer_size,
strm.byte_order ());
if (!id_stream.good_bit ())
{
return 0;
}
if (! id_stream.read_string (id))
return 0;
// It's possible the id is read again from an indirection stream,
// so make sure the id is the same.
ACE_CString mapped_id;
if (strm.get_repo_id_map ()->get()->find (pos, mapped_id) == 0)
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_repository_id, found %x=%C\n"),
pos, mapped_id.c_str ()));
}
if (ACE_OS::strcmp (mapped_id.c_str (), id.c_str ()) != 0)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_repository_id, found %C in map for %C\n"),
mapped_id.c_str (), id.c_str ()));
throw CORBA::INTERNAL ();
}
}
else if (strm.get_repo_id_map ()->get ()->bind (pos, id) != 0)
{
throw CORBA::INTERNAL ();
}
else if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_repository_id, bound %x=%C\n"),
pos, id.c_str ()));
}
// Since the ID is always read from the indirection cdr we have to skip
// the main CDR forward if we were in fact reading from the current
// location and not rewinding back some offset.
strm.skip_bytes (length);
return 1;
}
CORBA::Boolean
CORBA::ValueBase::_tao_read_codebase_url (TAO_InputCDR& strm,
ACE_CString& codebase_url)
{
CORBA::ULong length = 0;
size_t buffer_size = strm.length();
if (!strm.read_ulong (length))
{
return 0;
}
VERIFY_MAP (TAO_InputCDR, codebase_url_map, Codebase_URL_Map);
char * pos = strm.rd_ptr();
// 'length' may not be the codebase url length - it could be the
// FFFFFFF indirection marker instead. If it is an indirection marker, we
// get the offset following the indirection marker, otherwise we can follow
// the same logic using the offset to simply rewind to the start of length
// and re-read the length as part of the string
if (TAO_OBV_GIOP_Flags::is_indirection_tag (length))
{
return _tao_unmarshal_codebase_url_indirection (strm, codebase_url);
}
pos -= sizeof (CORBA::ULong);
// Cribbed from tc_demarshal_indirection in Typecode_CDR_Extraction.cpp
TAO_InputCDR url_stream (pos,
buffer_size,
strm.byte_order ());
if (!url_stream.good_bit ())
{
return 0;
}
if (! url_stream.read_string (codebase_url))
return 0;
// It's possible the codebase url is read again from an indirection stream,
// so make sure the codebase url is the same.
ACE_CString mapped_url;
if (strm.get_codebase_url_map ()->get()->find (pos, mapped_url) == 0)
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_codebase_url, found %x=%C\n"),
pos, mapped_url.c_str ()));
}
if (ACE_OS::strcmp (mapped_url.c_str (), codebase_url.c_str ()) != 0)
throw CORBA::INTERNAL ();
}
else if (strm.get_codebase_url_map ()->get()->bind (pos, codebase_url) != 0)
{
throw CORBA::INTERNAL ();
}
else
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_codebase_url, bound %x=%C\n"),
pos, codebase_url.c_str ()));
}
}
// Since the codebase url is always read from the indirection cdr we have to skip
// the main CDR forward if we were in fact reading from the current
// location and not rewinding back some offset.
strm.skip_bytes (length);
return 1;
}
void
CORBA::ValueBase::truncation_hook ()
{
throw ::CORBA::INTERNAL ();
}
// ================== Typecode initializations ==================
namespace TAO
{
namespace TypeCode
{
char const tc_value_base_id[] = "IDL:omg.org/CORBA/ValueBase:1.0";
char const tc_value_base_name[] = "ValueBase";
Value<char const *,
CORBA::TypeCode_ptr const *,
Value_Field<char const *, CORBA::TypeCode_ptr const *> const *,
TAO::Null_RefCount_Policy> tc_ValueBase (CORBA::tk_value,
tc_value_base_id,
tc_value_base_name,
CORBA::VM_NONE,
&CORBA::_tc_null,
0, // Field array
0); // Field count
char const tc_event_base_id[] = "IDL:omg.org/CORBA/EventBase:1.0";
char const tc_event_base_name[] = "EventBase";
Value<char const *,
CORBA::TypeCode_ptr const *,
Value_Field<char const *, CORBA::TypeCode_ptr const *> const *,
TAO::Null_RefCount_Policy> tc_EventBase (CORBA::tk_event,
tc_event_base_id,
tc_event_base_name,
CORBA::VM_NONE,
&CORBA::_tc_null,
0, // Field array
0); // Field count
}
}
namespace CORBA
{
TypeCode_ptr const _tc_ValueBase = &TAO::TypeCode::tc_ValueBase;
TypeCode_ptr const _tc_EventBase = &TAO::TypeCode::tc_EventBase;
}
// member functions for CORBA::DefaultValueRefCountBase ============
// destructor
CORBA::DefaultValueRefCountBase::~DefaultValueRefCountBase (void)
{
}
void
CORBA::DefaultValueRefCountBase::_add_ref (void)
{
this->_tao_add_ref ();
}
void
CORBA::DefaultValueRefCountBase::_remove_ref (void)
{
this->_tao_remove_ref ();
}
CORBA::ULong
CORBA::DefaultValueRefCountBase::_refcount_value (void)
{
return this->_tao_refcount_value ();
}
// ===========================================================
CORBA::DefaultValueRefCountBase::DefaultValueRefCountBase (void)
: refcount_ (1)
{
}
// Copy constructor
CORBA::DefaultValueRefCountBase::DefaultValueRefCountBase
(const DefaultValueRefCountBase& rhs)
: ValueBase (rhs),
refcount_ (1)
{
}
void
CORBA::DefaultValueRefCountBase::_tao_add_ref (void)
{
++this->refcount_;
}
void
CORBA::DefaultValueRefCountBase::_tao_remove_ref (void)
{
CORBA::ULong const new_count = --this->refcount_;
if (new_count == 0)
delete this;
}
CORBA::ULong
CORBA::DefaultValueRefCountBase::_tao_refcount_value (void)
{
return this->refcount_.value ();
}
// ===========================================================
CORBA::Boolean
operator<< (TAO_OutputCDR &strm,
const CORBA::ValueBase *_tao_valuetype)
{
return CORBA::ValueBase::_tao_marshal (
strm,
_tao_valuetype,
reinterpret_cast<ptrdiff_t> (&CORBA::ValueBase::_downcast)
);
}
CORBA::Boolean
operator>> (TAO_InputCDR &strm,
CORBA::ValueBase *&_tao_valuetype)
{
return CORBA::ValueBase::_tao_unmarshal (strm, _tao_valuetype);
}
#if defined (GEN_OSTREAM_OPS)
std::ostream&
operator<< (std::ostream &strm,
CORBA::ValueBase *_tao_valuetype)
{
return CORBA::ValueBase::_tao_stream (strm, _tao_valuetype);
}
#endif /* GEN_OSTREAM_OPS */
// =============== Template Specializations =====================
namespace TAO
{
void
Value_Traits<CORBA::ValueBase>::add_ref (
CORBA::ValueBase *p)
{
CORBA::add_ref (p);
}
void
Value_Traits<CORBA::ValueBase>::remove_ref (
CORBA::ValueBase * p)
{
CORBA::remove_ref (p);
}
void
Value_Traits<CORBA::ValueBase>::release (
CORBA::ValueBase * p)
{
CORBA::remove_ref (p);
}
}
TAO_END_VERSIONED_NAMESPACE_DECL
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