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//
// $Id$
//
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// union_ci.cpp
//
// = DESCRIPTION
// Visitor generating code for Union in the client inline file
//
// = AUTHOR
// Aniruddha Gokhale
//
// ============================================================================
#include "idl.h"
#include "idl_extern.h"
#include "be.h"
#include "be_visitor_union.h"
ACE_RCSID(be_visitor_union, union_ci, "$Id$")
// ******************************************************
// for client inline
// ******************************************************
be_visitor_union_ci::be_visitor_union_ci (be_visitor_context *ctx)
: be_visitor_union (ctx)
{
}
be_visitor_union_ci::~be_visitor_union_ci (void)
{
}
// visit the Union node and its scope
int be_visitor_union_ci::visit_union (be_union *node)
{
TAO_OutStream *os; // output stream
be_type *bt; // type node
// instantiate a visitor context with a copy of our context. This info
// will be modified based on what type of node we are visiting
be_visitor_context ctx (*this->ctx_);
ctx.node (node); // set the node to be the node being visited. The scope is
// still the same
if (!node->cli_inline_gen () && !node->imported ())
{
os = this->ctx_->stream ();
*os << "// *************************************************************"
<< be_nl;
*os << "// Inline operations for union " << node->name () << be_nl;
*os << "// *************************************************************\n\n";
os->indent ();
// the virtual overloaded _reset method
*os << "// this reset method is used by the decoding engine" << be_nl;
*os << "ACE_INLINE void" << be_nl
<< node->name () << "::_reset (void)" << be_nl
<< "{" << be_idt_nl
<< "this->_reset (this->disc_, 1);" << be_nl
<< "ACE_OS::memcpy (&this->u_, 0, sizeof (this->u_));" << be_uidt_nl
<< "}" << be_nl << be_nl;
// the virtual overloaded _discriminant method
*os << "// returns pointer to the discriminant" << be_nl;
*os << "ACE_INLINE void *" << be_nl
<< node->name () << "::_discriminant (void)" << be_nl
<< "{" << be_idt_nl;
if (node->has_duplicate_case_labels ())
{
// If there are duplicate case labels, we may have to
// modify what this generated function returns, so that
// the ORB function that called it can find a match with
// the value found in the typecode.
*os << "switch (this->disc_)" << be_idt_nl;
*os << "{" << be_idt_nl;
AST_Decl *d;
be_union_branch *ub;
UTL_ScopeActiveIterator *si =
new UTL_ScopeActiveIterator (node,
UTL_Scope::IK_decls);
while (!si->is_done())
{
d = si->item ();
ub = be_union_branch::narrow_from_decl (d);
AST_UnionLabel *ul = ub->label (0);
if (ul->label_kind () == AST_UnionLabel::UL_label)
{
// Map the actual discriminant value to the value
// of the first value encountered for that member,
// because that is the value that will be found in
// the typecode.
for (unsigned int i = 0; i < ub->label_list_length (); i++)
{
*os << "case ";
ub->gen_label_value (os, i);
*os << ":" << be_idt_nl;
*os << "this->holder_ = ";
ub->gen_label_value (os, 0);
*os << ";" << be_nl;
*os << "break;" << be_uidt_nl;
}
}
si->next ();
}
delete si;
*os << "default:" << be_idt_nl;
be_union::DefaultValue dv;
if (node->default_value (dv) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"computing default value failed\n"),
-1);
}
// If we have an implicit or explicit default case, we must
// set the return value to some legal default value.
// Otherwise, we do nothing - this case will not be reached,
// but it makes some comilers happy to have it there.
if ((dv.computed_ != 0))
{
*os << "this->holder_ = ";
ub->gen_default_label_value (os, node);
*os << ";" << be_nl;
}
*os << "break;" << be_uidt << be_uidt_nl;
*os << "}" << be_uidt_nl << be_nl;
*os << "return &this->holder_;" << be_uidt_nl;
}
// If there are no duplicate case labels, this sufficient.
else
{
*os << "return &this->disc_;" << be_uidt_nl;
}
*os << "}\n\n";
// the discriminant type may have to be defined here if it was an enum
// declaration inside of the union statement.
bt = be_type::narrow_from_decl (node->disc_type ());
if (!bt)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"bad discriminant type\n"), -1);
}
ctx.state (TAO_CodeGen::TAO_UNION_DISCTYPEDEFN_CI); // set current code
// gen state
be_visitor *visitor = tao_cg->make_visitor (&ctx);
if (!visitor)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"bad visitor\n"), -1);
}
// generate code for the discriminant
if (bt->accept (visitor) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit union - "
"codegen for discrminant failed\n"), -1);
}
// now generate the implementation of the access methods for the
// union. For this set our state
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_CI);
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"codegen for scope failed\n"), -1);
}
// generate the ifdefined macro for the array type
os->gen_ifdef_macro (node->flat_name (), "_var");
if (node->gen_var_impl () == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"codegen for _var failed\n"), -1);
}
os->gen_endif ();
// generate the ifdefined macro for the array type then generate the _out
// impl
os->gen_ifdef_macro (node->flat_name (), "_out");
if (node->size_type () == be_decl::VARIABLE
&& node->gen_out_impl () == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_ci::"
"visit_union - "
"codegen for _out failed\n"), -1);
}
os->gen_endif ();
node->cli_inline_gen (I_TRUE);
}
return 0;
}
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