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//{{{  Banner                           

//============================================================================

//

//     component.cxx

//

//     Implementation of the CdlComponent class

//

//============================================================================

//####COPYRIGHTBEGIN####

//                                                                          

// ----------------------------------------------------------------------------

// Copyright (C) 2002 Bart Veer

// Copyright (C) 1999, 2000 Red Hat, Inc.

//

// This file is part of the eCos host tools.

//

// This program is free software; you can redistribute it and/or modify it 

// under the terms of the GNU General Public License as published by the Free 

// Software Foundation; either version 2 of the License, or (at your option) 

// any later version.

// 

// This program is distributed in the hope that it will be useful, but WITHOUT 

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 

// more details.

// 

// You should have received a copy of the GNU General Public License along with

// this program; if not, write to the Free Software Foundation, Inc., 

// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

//

// ----------------------------------------------------------------------------

//                                                                          

//####COPYRIGHTEND####

//============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   bartv

// Contact(s):  bartv

// Date:        1999/03/01

// Version:     0.02

//

//####DESCRIPTIONEND####

//============================================================================

//}}}

//{{{  #include's                       

// ----------------------------------------------------------------------------

#include "cdlconfig.h"

// Get the infrastructure types, assertions, tracing and similar

// facilities.

#include <cyg/infra/cyg_ass.h>

#include <cyg/infra/cyg_trac.h>

// <cdl.hxx> defines everything implemented in this module.

// It implicitly supplies <string>, <vector> and <map> because

// the class definitions rely on these headers.

#include <cdl.hxx>

//}}}

//{{{  Statics                          

// ----------------------------------------------------------------------------

CYGDBG_DEFINE_MEMLEAK_COUNTER(CdlComponentBody);

//}}}

//{{{  Constructor                      

// ----------------------------------------------------------------------------

CdlComponentBody::CdlComponentBody(std::string name_arg)

    : CdlNodeBody(name_arg),

      CdlContainerBody(),

      CdlUserVisibleBody(),

      CdlValuableBody(),

      CdlParentableBody(),

      CdlBuildableBody(),

      CdlDefinableBody()

{

    CYG_REPORT_FUNCNAME("CdlComponentBody:: constructor");

    CYG_REPORT_FUNCARG1XV(this);

    cdlcomponentbody_cookie = CdlComponentBody_Magic;

    CYGDBG_MEMLEAK_CONSTRUCTOR();

    CYG_POSTCONDITION_THISC();

    CYG_REPORT_RETURN();

}

//}}}

//{{{  Destructor                       

// ----------------------------------------------------------------------------

CdlComponentBody::~CdlComponentBody()

{

    CYG_REPORT_FUNCNAME("CdlComponentBody:: destructor");

    CYG_REPORT_FUNCARG1XV(this);

    CYG_PRECONDITION_THISC();

    cdlcomponentbody_cookie = CdlComponentBody_Invalid;

    CYGDBG_MEMLEAK_DESTRUCTOR();

    CYG_REPORT_RETURN();

}

//}}}

//{{{  parse_component()                

// ----------------------------------------------------------------------------

// Parsing a component definition. This routine gets invoked directly from the

// Tcl interpreter.

int

CdlComponentBody::parse_component(CdlInterpreter interp, int argc, const char* argv[])

{

    CYG_REPORT_FUNCNAMETYPE("CdlComponentBody::parse_component", "result %d");

    CYG_REPORT_FUNCARG1("argc %d", argc);

    CYG_PRECONDITION_CLASSC(interp);

    std::string  diag_argv0      = CdlParse::get_tcl_cmd_name(argv[0]);

    CdlLoadable  loadable       = interp->get_loadable();

    CdlPackage   package        = dynamic_cast<CdlPackage>(loadable);

    CdlContainer parent         = interp->get_container();

    CdlToplevel  toplevel       = interp->get_toplevel();

    CYG_ASSERT_CLASSC(loadable);        // There should always be a loadable during parsing

    CYG_ASSERT_CLASSC(package);         // And packages are the only loadable for software CDL.

    CYG_ASSERT_CLASSC(parent);

    CYG_ASSERT_CLASSC(toplevel);

    // The new component should be created and added to the package

    // early on. If there is a parsing error it will get cleaned up

    // automatically as a consequence of the package destructor.

    // However it is necessary to validate the name first. Errors

    // should be reported via CdlParse::report_error(),

    // which may result in an exception.

    CdlComponent new_component  = 0;

    bool         ok             = true;

    int          result         = TCL_OK;

    try {

        // Currently there are no options. This may change in future.

        if (3 != argc) {

            CdlParse::report_error(interp, "",

                                   std::string("Incorrect number of arguments to `") + diag_argv0 +

                                         "'\nExpecting name and properties list.");

            ok = false;

            goto done;

        }

        if (!Tcl_CommandComplete(CDL_TCL_CONST_CAST(char*, argv[2]))) {

            CdlParse::report_error(interp, "",

                                   std::string("Invalid property list for cdl_component `") + argv[1] + "'.");

            ok = false;

            goto done;

        }

        if (0 != toplevel->lookup(argv[1])) {

            CdlParse::report_error(interp, "",

                                   std::string("Component `") + argv[1] +

                                   "' cannot be loaded.\nThe name is already in use.");

            ok = false;

        } else {

            new_component = new CdlComponentBody(argv[1]);

            toplevel->add_node(package, parent, new_component);

        }

      done:

        if (!ok) {

            // Just because this component cannot be created, that is no

            // reason to abort the whole parsing process.

            CYG_REPORT_RETVAL(TCL_OK);

            return TCL_OK;

        }

    } catch(std::bad_alloc e) {

        interp->set_result(CdlParse::construct_diagnostic(interp, "internal error", "", "Out of memory"));

        result = TCL_ERROR;

    } catch(CdlParseException e) {

        interp->set_result(e.get_message());

        result = TCL_ERROR;

    } catch(...) {

        interp->set_result(CdlParse::construct_diagnostic(interp, "internal error", "", "Unexpected C++ exception"));

        result = TCL_ERROR;

    }

    if (TCL_OK != result) {

        CYG_REPORT_RETVAL(result);

        return result;

    }

    // At this stage new_component has been created and added to the hierarchy.

    // The main work now is to add the properties.

    // Push the component as the current node early on. This aids

    // diagnostics. Also make it the new container.

    CdlNode      old_node       = interp->push_node(new_component);

    CdlContainer old_container  = interp->push_container(new_component);

    std::string  old_context;

    CYG_ASSERTC(parent == old_container);

    // Declare these outside the scope of the try statement, to allow

    // goto calls for the error handling.

    std::string tcl_result;

    std::vector<CdlInterpreterCommandEntry>  new_commands;

    std::vector<CdlInterpreterCommandEntry>* old_commands = 0;

    static CdlInterpreterCommandEntry commands[] =

    {

        CdlInterpreterCommandEntry("script",             &CdlComponentBody::parse_script    ),

        CdlInterpreterCommandEntry("cdl_component",      &CdlComponentBody::parse_component ),

        CdlInterpreterCommandEntry("cdl_option",         &CdlOptionBody::parse_option       ),

        CdlInterpreterCommandEntry("cdl_interface",      &CdlInterfaceBody::parse_interface ),

        CdlInterpreterCommandEntry("cdl_dialog",         &CdlDialogBody::parse_dialog       ),

        CdlInterpreterCommandEntry("cdl_wizard",         &CdlWizardBody::parse_wizard       ),

        CdlInterpreterCommandEntry("",                   0                                  )

    };

    static CdlInterpreterCommandEntry   script_commands[] =

    {

        CdlInterpreterCommandEntry("cdl_component",      &CdlComponentBody::parse_component ),

        CdlInterpreterCommandEntry("cdl_option",         &CdlOptionBody::parse_option       ),

        CdlInterpreterCommandEntry("cdl_interface",      &CdlInterfaceBody::parse_interface ),

        CdlInterpreterCommandEntry("cdl_dialog",         &CdlDialogBody::parse_dialog       ),

        CdlInterpreterCommandEntry("cdl_wizard",         &CdlWizardBody::parse_wizard       ),

        CdlInterpreterCommandEntry("",                   0                                  ),

    };

    int i;

    // All parsing errors may result in an exception, under the control of

    // application code. This exception must not pass through the Tcl interpreter.

    try {

        for (i = 0; 0 != commands[i].command; i++) {

            new_commands.push_back(commands[i]);

        }

        CdlBuildableBody::add_property_parsers(new_commands);

        CdlDefinableBody::add_property_parsers(new_commands);

        CdlParentableBody::add_property_parsers(new_commands);

        CdlValuableBody::add_property_parsers(new_commands);

        CdlUserVisibleBody::add_property_parsers(new_commands);

        CdlNodeBody::add_property_parsers(new_commands);

        // Now evaluate the body. If an error occurs then typically

        // this will be reported via CdlParse::report_error(),

        // but any exceptions will have been intercepted and

        // turned into a Tcl error.

        old_commands = interp->push_commands(new_commands);

        result = interp->eval(argv[2], tcl_result);

        interp->pop_commands(old_commands);

        if (TCL_OK != result) {

            // No point in taking any further action, just go with the flow

            goto done2;

        }

        // Even if there were errors, they were not fatal. There may

        // now be a number of properties for this component, and some

        // validation should take place. Start with the base classes.

        new_component->CdlNodeBody::check_properties(interp);

        new_component->CdlUserVisibleBody::check_properties(interp);

        new_component->CdlValuableBody::check_properties(interp);

        new_component->CdlParentableBody::check_properties(interp);

        new_component->CdlBuildableBody::check_properties(interp);

        new_component->CdlDefinableBody::check_properties(interp);

        // There should be at most one each of wizard and script.

        if (new_component->count_properties(CdlPropertyId_Wizard) > 1) {

            CdlParse::report_error(interp, "", "A component should have at most one `wizard' property.");

        }

        if (new_component->count_properties(CdlPropertyId_Script) > 1) {

            CdlParse::report_error(interp, "", "A component should have at most one `script' property.");

        }

        // If there is a script property, life gets more interesting.

        if (new_component->has_property(CdlPropertyId_Script)) {

            CdlProperty_String prop = dynamic_cast<CdlProperty_String>(new_component->get_property(CdlPropertyId_Script));

            CYG_PRECONDITION_CLASSC(prop);

            std::string script_name = prop->get_string();

            // Try to locate this script.

            std::string script_filename = package->find_absolute_file(script_name, "cdl", false);

            if ("" == script_filename) {

                CdlParse::report_error(interp, "", "Unable to find script `" + script_name + "'.");

            } else {

                // The script exists, so we need to try and execute it.

                // The current container is still set correctly, but we need

                // to change the filename and install a different set

                // of commands.

                old_context = interp->push_context(script_filename);

                new_commands.clear();

                for (i = 0; 0 != script_commands[i].command; i++) {

                    new_commands.push_back(script_commands[i]);

                }

                old_commands = interp->push_commands(new_commands);

                result = interp->eval_file(script_filename, tcl_result);

                interp->pop_commands(old_commands);

                interp->pop_context(old_context);

            }

        }

      done2:

        // Dummy command just to keep the compiler happy

        old_context = "";

    } catch (std::bad_alloc e) {

        // Errors at this stage should be reported via Tcl, not via C++.

        // However there is no point in continuing with the parsing operation,

        // just give up.

        interp->set_result(CdlParse::construct_diagnostic(interp, "internal error", "", "Out of memory"));

        result = TCL_ERROR;

    } catch (CdlParseException e) {

        interp->set_result(e.get_message());

        result = TCL_ERROR;

    } catch(...) {

        interp->set_result(CdlParse::construct_diagnostic(interp, "internal error", "", "Unexpected C++ exception"));

        result = TCL_ERROR;

    }

    // Restore the interpreter to its prior state.

    interp->pop_node(old_node);

    interp->pop_container(old_container);

    if (0 != old_commands) {

        interp->pop_commands(old_commands);

    }

    CYG_REPORT_RETVAL(result);

    return result;

}

// ----------------------------------------------------------------------------

// Syntax: script <filename>

int

CdlComponentBody::parse_script(CdlInterpreter interp, int argc, const char* argv[])

{

    CYG_REPORT_FUNCNAMETYPE("parse_script", "result %d");

    int result = CdlParse::parse_string_property(interp, argc, argv, CdlPropertyId_Script, 0, 0);

    CYG_REPORT_RETVAL(result);

    return result;

}

//}}}

//{{{  Propagation support              

// ----------------------------------------------------------------------------

void

CdlComponentBody::update(CdlTransaction transaction, CdlUpdate update)

{

    CYG_REPORT_FUNCNAME("CdlComponent::update");

    this->CdlValuableBody::update(transaction, update);

    this->CdlContainerBody::update(transaction, update);

    CYG_REPORT_RETURN();

}

//}}}

//{{{  Persistence support              

// ----------------------------------------------------------------------------

void

CdlComponentBody::initialize_savefile_support(CdlToplevel toplevel)

{

    CYG_REPORT_FUNCNAME("CdlComponent::initialize_savefile_support");

    toplevel->add_savefile_command("cdl_component", 0, &savefile_component_command);

    CdlValuableBody::initialize_savefile_support(toplevel, "cdl_component");

    CYG_REPORT_RETURN();

}

void

CdlComponentBody::save(CdlInterpreter interp, Tcl_Channel chan, int indentation, bool minimal)

{

    CYG_REPORT_FUNCNAME("CdlComponent::save");

    CYG_REPORT_FUNCARG5XV(this, interp, chan, indentation, minimal);

    CYG_PRECONDITION_THISC();

    CYG_PRECONDITION_CLASSC(interp);

    if (!minimal || this->has_additional_savefile_information() || this->value_savefile_entry_needed()) {

        // Start with the UserVisible data, which will result in a suitable set

        // of comments before the package definition itself.

        this->CdlUserVisibleBody::save(interp, chan, indentation, minimal);

        // Now output the line "cdl_component <name> {"

        // The name is guaranteed to be a valid C preprocessor symbol, so it

        // is not going to need any quoting.

        std::string data = std::string(indentation, ' ') + "cdl_component " + get_name() + " {\n";

        interp->write_data(chan, data);

        // Deal with the value

        bool modifiable = !(CdlValueFlavor_None == this->get_flavor()) &&

            !this->has_property(CdlPropertyId_Calculated);

        this->CdlValuableBody::save(interp, chan, indentation + 4, modifiable, minimal);

        // And with any unrecognised data

        this->CdlNodeBody::save(interp, chan, indentation + 4, minimal);

        // Close the cdl_component body. A blank line is added here.

        interp->write_data(chan, "};\n\n");

    }

    // Packages are containers, so dump the contents as well.

    this->CdlContainerBody::save(interp, chan, indentation, minimal);

    CYG_REPORT_RETURN();

}

int

CdlComponentBody::savefile_component_command(CdlInterpreter interp, int argc, const char* argv[])

{

    CYG_REPORT_FUNCNAMETYPE("CdlComponent::savefile_component_command", "result %d");

    CYG_PRECONDITION_CLASSC(interp);

    int result = TCL_OK;

    CdlToplevel toplevel = interp->get_toplevel();

    CYG_ASSERT_CLASSC(toplevel);

    CdlConfiguration config = dynamic_cast<CdlConfiguration>(toplevel);

    CYG_ASSERT_CLASSC(config);

    std::vector<CdlInterpreterCommandEntry> subcommands;

    std::vector<CdlInterpreterCommandEntry>* toplevel_commands = 0;

    CdlNode old_node = 0;

    try {

        if (3 != argc) {

            CdlParse::report_error(interp, "", "Invalid cdl_component command in savefile, expecting two arguments.");

        } else {

            CdlNode current_node = config->lookup(argv[1]);

            if (0 == current_node) {

                // FIXME: save value in limbo

                CdlParse::report_error(interp, "",

                                       std::string("The savefile contains a cdl_component command for an unknown component `")

                                       + argv[1] + "'");

            } else {

                config->get_savefile_subcommands("cdl_component", subcommands);

                toplevel_commands = interp->push_commands(subcommands);

                old_node = interp->push_node(current_node);

                std::string tcl_result;

                result = interp->eval(argv[2], tcl_result);

                interp->pop_commands(toplevel_commands);

                toplevel_commands = 0;

                interp->pop_node(old_node);

                old_node = 0;

            }

        }

    } catch(...) {

        if (0 != old_node) {

            interp->pop_node(old_node);

        }

        if (0 != toplevel_commands) {

            interp->pop_commands(toplevel_commands);

        }

        throw;

    }

    CYG_REPORT_RETVAL(result);

    return result;

}

//}}}

//{{{  check_this()                     

// ----------------------------------------------------------------------------

bool

CdlComponentBody::check_this(cyg_assert_class_zeal zeal) const

{

    if (CdlComponentBody_Magic != cdlcomponentbody_cookie) {

        return false;

    }

    CYGDBG_MEMLEAK_CHECKTHIS();

    return CdlNodeBody::check_this(zeal)        &&

           CdlContainerBody::check_this(zeal)   &&

           CdlUserVisibleBody::check_this(zeal) &&

           CdlParentableBody::check_this(zeal)  &&

           CdlValuableBody::check_this(zeal)    &&

           CdlBuildableBody::check_this(zeal)   &&

           CdlDefinableBody::check_this(zeal);

}

//}}}

//{{{  Misc                             

// ----------------------------------------------------------------------------

std::string

CdlComponentBody::get_class_name() const

{

    CYG_REPORT_FUNCNAME("CdlComponent::get_class_name");

    CYG_PRECONDITION_THISC();

    CYG_REPORT_RETURN();

    return "component";

}

//}}}