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// $Id$
// ============================================================================
//
// = LIBRARY
// TAO IDL
//
// = FILENAME
// be_union_branch.cpp
//
// = DESCRIPTION
// Extension of class AST_UnionBranch that provides additional means for C++
// mapping.
//
// = AUTHOR
// Copyright 1994-1995 by Sun Microsystems, Inc.
// and
// Aniruddha Gokhale
//
// ============================================================================
#include "idl.h"
#include "idl_extern.h"
#include "be.h"
ACE_RCSID(be, be_union_branch, "$Id$")
/*
* BE_UnionBranch
*/
be_union_branch::be_union_branch (void)
{
}
be_union_branch::be_union_branch (AST_UnionLabel *lab, AST_Type *ft,
UTL_ScopedName *n, UTL_StrList *p)
: AST_UnionBranch (lab, ft, n, p),
AST_Field (AST_Decl::NT_union_branch, ft, n, p),
AST_Decl (AST_Decl::NT_union_branch, n, p)
{
}
int
be_union_branch::gen_encapsulation (void)
{
TAO_OutStream *cs; // output stream
TAO_NL nl; // end line
TAO_CodeGen *cg = TAO_CODEGEN::instance ();
be_type *bt; // our type node
long i, arrlen;
ACE_UINT32 *arr;
cs = cg->client_stubs ();
*cs << be_nl;
// be_union* the_union =
// be_union::narrow_from_scope (this->defined_in ());
ACE_UINT32 buf[1];
ACE_OS::memset (buf, 0, sizeof (buf));
// emit the case label value
AST_Expression *expression = this->label ()->label_val ();
AST_Expression::AST_ExprValue *ev = expression->ev ();
switch (ev->et) // the_union->udisc_type ())
{
case AST_Expression::EV_char:
case AST_Expression::EV_bool:
cs->print ("ACE_IDL_NCTOHL (0x%02.2x)", (unsigned char)ev->u.cval);
break;
case AST_Expression::EV_wchar:
case AST_Expression::EV_short:
case AST_Expression::EV_ushort:
cs->print ("ACE_IDL_NSTOHL (0x%04.4x)", (unsigned short)ev->u.sval);
break;
case AST_Expression::EV_long:
case AST_Expression::EV_ulonglong:
*cs << expression;
break;
default:
if (expression->ec () == AST_Expression::EC_symbol)
{
*cs << expression;
}
else
{
ACE_ERROR_RETURN ((LM_ERROR,
"be_union_branch: (%N:%l) Label value "
"type (%d) is invalid\n", ev->et), -1);
}
break;
}
*cs << ", // union case label (evaluated)" << nl;
// emit name
*cs << (ACE_OS::strlen (this->local_name ()->get_string ())+1) << ", ";
(void)this->tc_name2long(this->local_name ()->get_string (), arr, arrlen);
for (i=0; i < arrlen; i++)
{
cs->print ("ACE_NTOHL (0x%x), ", arr[i]);
}
*cs << " // name = " << this->local_name () << "\n";
// hand over code generation to our type node
bt = be_type::narrow_from_decl (this->field_type ());
if (!bt)
return -1;
return bt->gen_typecode ();
}
long
be_union_branch::tc_encap_len (void)
{
if (this->encap_len_ == -1)
{
be_type *bt;
this->encap_len_ = 4; // case label;
this->encap_len_ += this->name_encap_len (); // for name
bt = be_type::narrow_from_decl (this->field_type ());
if (!bt)
{
ACE_ERROR ((LM_ERROR, "be_union_branch: bad field type\n"));
return -1;
}
this->encap_len_ += bt->tc_size (); // note that we add the typecode size
// of the type
}
return this->encap_len_;
}
// compute the size type of the node in question
int
be_union_branch::compute_size_type (void)
{
be_type *type = be_type::narrow_from_decl (this->field_type ());
if (!type)
{
ACE_ERROR_RETURN ((LM_ERROR,
"(%N:%l) be_field::compute_size_type - "
"bad field type\n"), -1);
}
// our size type is the same as our type
this->size_type (type->size_type ()); // as a side effect will also update
// the size type of parent
return 0;
}
int
be_union_branch::gen_label_value (TAO_OutStream *os)
{
AST_Expression *e = this->label ()->label_val ();
if (e->ec () != AST_Expression::EC_symbol)
{
// Easy, just a number...
*os << e;
return 0;
}
// If the enum is not in the global scope we have to prefix it.
be_union *u =
be_union::narrow_from_scope (this->defined_in ());
if (u == 0)
return -1;
be_type* dt =
be_type::narrow_from_decl (u->disc_type ());
if (dt == 0)
return -1;
// Find where was the enum defined, if it was defined in the globa
// scope, then it is easy to generate the enum values....
be_scope* scope =
be_scope::narrow_from_scope (dt->defined_in ());
if (scope == 0)
{
*os << e->n ();
return 0;
}
// But if it was generated inside a module or something similar then
// we must prefix the enum value with something...
be_decl* decl =
scope->decl ();
*os << decl->fullname () << "::" << e->n ();
return 0;
}
int
be_union_branch::accept (be_visitor *visitor)
{
return visitor->visit_union_branch (this);
}
// Narrowing
IMPL_NARROW_METHODS2 (be_union_branch, AST_UnionBranch, be_decl)
IMPL_NARROW_FROM_DECL (be_union_branch)
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