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//{{{  Banner                           

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

//

//     option.cxx

//

//     Implementation of the CdlOption 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(CdlOptionBody);

//}}}

//{{{  Constructor                      

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

CdlOptionBody::CdlOptionBody(std::string name_arg)

    : CdlNodeBody(name_arg),

      CdlUserVisibleBody(),

      CdlValuableBody(),

      CdlParentableBody(),

      CdlBuildableBody(),

      CdlDefinableBody()

{

    CYG_REPORT_FUNCNAME("CdlOptionBody:: constructor");

    CYG_REPORT_FUNCARG1XV(this);

    cdloptionbody_cookie = CdlOptionBody_Magic;

    CYGDBG_MEMLEAK_CONSTRUCTOR();

    CYG_POSTCONDITION_THISC();

    CYG_REPORT_RETURN();

}

//}}}

//{{{  Destructor                       

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

CdlOptionBody::~CdlOptionBody()

{

    CYG_REPORT_FUNCNAME("CdlOptionBody:: destructor");

    CYG_REPORT_FUNCARG1XV(this);

    CYG_PRECONDITION_THISC();

    cdloptionbody_cookie = CdlOptionBody_Invalid;

    CYGDBG_MEMLEAK_DESTRUCTOR();

    CYG_REPORT_RETURN();

}

//}}}

//{{{  parse_option()                   

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

// Parsing an option definition. This is basically the same as

// CdlComponent::parse_component(), but simpler: an option is not

// a container, and the only non-standard property is "parent".

int

CdlOptionBody::parse_option(CdlInterpreter interp, int argc, const char* argv[])

{

    CYG_REPORT_FUNCNAMETYPE("CdlOptionBody::parse_option", "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 option 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.

    CdlOption    new_option     = 0;

    bool         ok             = true;

    int          result         = TCL_OK;

    try {

        // Currently there are no command-line 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;

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

            CdlParse::report_error(interp, "",

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

            ok = false;

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

            CdlParse::report_error(interp, "",

                                   std::string("Option `") + argv[1] + "' cannot be loaded.\nThe name is already in use.");

            ok = false;

        } else {

            new_option = new CdlOptionBody(argv[1]);

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

        }

        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_option has been created and added to the hierarchy.

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

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

    // diagnostics.

    CdlNode old_node = interp->push_node(new_option);

    // 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("", 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]);

        }

        CdlDefinableBody::add_property_parsers(new_commands);

        CdlBuildableBody::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) {

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

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

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

            new_option->CdlNodeBody::check_properties(interp);

            new_option->CdlUserVisibleBody::check_properties(interp);

            new_option->CdlValuableBody::check_properties(interp);

            new_option->CdlParentableBody::check_properties(interp);

            new_option->CdlBuildableBody::check_properties(interp);

            new_option->CdlDefinableBody::check_properties(interp);

        }

    } 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);

    if (0 != old_commands) {

        interp->pop_commands(old_commands);

    }

    CYG_REPORT_RETVAL(result);

    return result;

}

//}}}

//{{{  Persistence support              

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

void

CdlOptionBody::initialize_savefile_support(CdlToplevel toplevel)

{

    CYG_REPORT_FUNCNAME("CdlOption::initialize_savefile_support");

    toplevel->add_savefile_command("cdl_option", 0, &savefile_option_command);

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

    CYG_REPORT_RETURN();

}

void

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

{

    CYG_REPORT_FUNCNAME("CdlOption::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_option <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_option " + 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_option body. A blank line is added here.

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

    }

    CYG_REPORT_RETURN();

}

int

CdlOptionBody::savefile_option_command(CdlInterpreter interp, int argc, const char* argv[])

{

    CYG_REPORT_FUNCNAMETYPE("CdlOption::savefile_option_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_option 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_option for an unknown option `")

                                       + argv[1] + "'");

            } else {

                config->get_savefile_subcommands("cdl_option", 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

CdlOptionBody::check_this(cyg_assert_class_zeal zeal) const

{

    if (CdlOptionBody_Magic != cdloptionbody_cookie) {

        return false;

    }

    CYGDBG_MEMLEAK_CHECKTHIS();

    return CdlNodeBody::check_this(zeal)        &&

           CdlUserVisibleBody::check_this(zeal) &&

           CdlValuableBody::check_this(zeal)    &&

           CdlParentableBody::check_this(zeal)  &&

           CdlBuildableBody::check_this(zeal)   &&

           CdlDefinableBody::check_this(zeal);

}

//}}}

//{{{  misc                             

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

std::string

CdlOptionBody::get_class_name() const

{

    CYG_REPORT_FUNCNAME("CdlOption::get_class_name");

    CYG_PRECONDITION_THISC();

    CYG_REPORT_RETURN();

    return "option";

}

//}}}