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/******************************************************************************/
/* REXX Kernel                                        RequiresDirective.cpp   */
/*                                                                            */
/* Primitive Translator Abstract Directive Code                               */
/*                                                                            */
/******************************************************************************/
#include "RexxCore.h"
#include "RequiresDirective.hpp"
#include "Clause.hpp"
#include "RexxActivation.hpp"




/**
 * Allocate a new requires directive.
 *
 * @param size   The size of the object.
 *
 * @return The memory for the new object.
 */
void *RequiresDirective::operator new(size_t size)
{
    return new_object(size, T_RequiresDirective);
}


/**
 * Construct a RequiresDirective.
 *
 * @param n      The name of the requires target.
 * @param clause The source file clause containing the directive.
 */
RequiresDirective::RequiresDirective(RexxString *n, RexxString *l, RexxClause *clause) : RexxDirective(clause, KEYWORD_REQUIRES)
{
    name = n;
    namespaceName = l;
}

/**
 * Normal garbage collecting live mark.
 *
 * @param liveMark The current live object mark.
 */
void RequiresDirective::live(size_t liveMark)
{
    // must be first one marked (though normally null)
    memory_mark(nextInstruction);
    memory_mark(name);
    memory_mark(namespaceName);
}


/**
 * The generalized object marking routine.
 *
 * @param reason The processing faze we're running the mark on.
 */
void RequiresDirective::liveGeneral(MarkReason reason)
{
    // must be first one marked (though normally null)
    memory_mark_general(nextInstruction);
    memory_mark_general(name);
    memory_mark_general(namespaceName);
}


/**
 * Flatten the directive instance.
 *
 * @param envelope The envelope we're flattening into.
 */
void RequiresDirective::flatten(Envelope *envelope)
{
    setUpFlatten(RequiresDirective)

    flattenRef(nextInstruction);
    flattenRef(name);
    flattenRef(namespaceName);

    cleanUpFlatten
}


/**
 * Do install-time processing of the ::requires directive.  This
 * will resolve the directive and merge all of the public information
 * from the resolved file into this program context.
 *
 * @param package The package we're attached to.
 * @param context The current activation context for the install.
 */
void RequiresDirective::install(PackageClass *package, RexxActivation *context)
{
    // make this the current instruction in the context for error reporting
    context->loadRequires(this);

    // the loading/merging is done by the package
    PackageClass *newPackage = package->loadRequires(context->getActivity(), name, RESOLVE_REQUIRES);
    // was this loaded with a namespace name?  Then add this to the package namespaces
    if (namespaceName != OREF_NULL)
    {
        package->addNamespace(namespaceName, newPackage);
    }
}