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//
// $Id$
//
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// union_cs.cpp
//
// = DESCRIPTION
// Visitor generating code for Unions in the client stubs
//
// = AUTHOR
// Aniruddha Gokhale
//
// ============================================================================
#include "idl.h"
#include "idl_extern.h"
#include "be.h"
#include "be_visitor_union.h"
ACE_RCSID(be_visitor_union, union_cs, "$Id$")
// ******************************************************
// for client stubs
// ******************************************************
be_visitor_union_cs::be_visitor_union_cs (be_visitor_context *ctx)
: be_visitor_union (ctx)
{
}
be_visitor_union_cs::~be_visitor_union_cs (void)
{
}
// visit the Union_cs node and its scope
int be_visitor_union_cs::visit_union (be_union *node)
{
TAO_OutStream *os; // output stream
be_type *bt; // for discriminant type
if (!node->cli_stub_gen () && !node->imported ())
{
os = this->ctx_->stream ();
be_visitor_context ctx (*this->ctx_);
// the discriminant type may have to be defined here if it was an enum
// declaration inside of the union statement. We need to generate its
// typecode
bt = be_type::narrow_from_decl (node->disc_type ());
if (!bt)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs::"
"visit_union - "
"bad discriminant type\n"), -1);
}
ctx.state (TAO_CodeGen::TAO_UNION_DISCTYPEDEFN_CS); // 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_cs::"
"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_cs::"
"visit union - "
"codegen for discrminant failed\n"), -1);
}
// first generate code for any of the members (if required, e.g.,
// anonymous sequences, structs, unions, arrays)
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_CS); // set current code
// gen state
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs"
"visit_union - "
"codegen for scope failed\n"), -1);
}
// now generate the operations on the union such as the copy constructor
// and the assignment operator
*os << "// *************************************************************"
<< be_nl;
*os << "// Operations for union " << node->name () << be_nl;
*os << "// *************************************************************\n\n";
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_ASSIGN_CS);
// generate the copy constructor and the assignment operator here
os->indent ();
*os << "// default constructor" << be_nl
<< node->name () << "::" << node->local_name () << " (void)" << be_nl
<< " : TAO_Base_Union ()" << be_nl
<< "{" << be_idt_nl
<< "ACE_OS::memset (&this->disc_, 0, sizeof (this->disc_));" << be_nl
<< "ACE_OS::memset (&this->u_, 0, sizeof (this->u_));" << be_uidt_nl
<< "}" << be_nl << be_nl;
*os << "// copy constructor" << be_nl;
*os << node->name () << "::" << node->local_name () << " (const " <<
node->name () << " &u)" << be_nl;
*os << "{" << be_idt_nl;
// first reset and set the discriminant
*os << "this->_reset (u.disc_, 0);" << be_nl;
*os << "this->disc_ = u.disc_;" << be_nl;
// now switch based on the disc value
*os << "switch (this->disc_)" << be_nl;
*os << "{\n";
os->incr_indent (0);
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs"
"visit_union - "
"codegen for copy ctor failed\n"), -1);
}
os->decr_indent ();
*os << "}\n";
os->decr_indent ();
*os << "}\n\n";
// assignment operator
os->indent ();
*os << "// assignment operator" << be_nl;
*os << node->name () << " &" << be_nl; // return type
*os << node->name () << "::operator= (const " <<
node->name () << " &u)" << be_nl;
*os << "{\n";
os->incr_indent ();
// first reset and set the discriminant
*os << "this->_reset (u.disc_, 0);" << be_nl;
*os << "this->disc_ = u.disc_;" << be_nl;
// now switch based on the disc value
*os << "switch (this->disc_)" << be_nl;
*os << "{\n";
os->incr_indent (0);
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs"
"visit_union - "
"codegen for assign op failed\n"), -1);
}
os->decr_indent ();
*os << "}" << be_nl;
*os << "return *this;\n";
os->decr_indent ();
*os << "}\n\n";
// the reset method
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_RESET_CS);
os->indent ();
*os << "// reset method to reset old values of a union" << be_nl;
*os << "void " << node->name () << "::_reset (" << bt->name ()
<< " new_disc_val, CORBA::Boolean finalize)" << be_nl;
*os << "{" << be_idt_nl;
*os << "if ((this->disc_ != new_disc_val) || finalize)" << be_nl;
*os << "{" << be_idt_nl;
*os << "switch (this->disc_)" << be_nl;
*os << "{" << be_idt_nl;
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs"
"visit_union - "
"codegen for reset failed\n"), -1);
}
*os << be_uidt_nl << "}" << be_uidt_nl
<< "}" << be_uidt_nl
<< "}\n\n";
// the access method
os->indent ();
*os << "// the virtual overloaded access method" << be_nl;
*os << "void *" << node->name () << "::_access ("
<< " CORBA::Boolean alloc_flag)" << be_nl;
*os << "{" << be_idt_nl;
*os << "switch (this->disc_)" << be_nl;
*os << "{" << be_idt_nl;
this->ctx_->state (TAO_CodeGen::TAO_UNION_PUBLIC_ACCESS_CS);
if (this->visit_scope (node) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs"
"visit_union - "
"codegen for access failed\n"), -1);
}
*os << be_uidt_nl << "}" << be_nl;
*os << "return 0; // default" << be_uidt_nl
<< "}\n\n";
// by using a visitor to declare and define the TypeCode, we have the
// added advantage to conditionally not generate any code. This will be
// based on the command line options. This is still TO-DO
ctx = *this->ctx_;
ctx.state (TAO_CodeGen::TAO_TYPECODE_DEFN);
visitor = tao_cg->make_visitor (&ctx);
if (!visitor || (node->accept (visitor) == -1))
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_visitor_union_cs::"
"visit_union - "
"TypeCode definition failed\n"
), -1);
}
node->cli_stub_gen (I_TRUE);
}
return 0;
}
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