[r120]: interpreter-3.x / trunk / kernel / instructions / AddressInstruction.cpp  Maximize  Restore  History

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/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
/* Copyright (c) 2005-2006 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
/* http://www.oorexx.org/license.html */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the distribution. */
/* */
/* Neither the name of Rexx Language Association nor the names */
/* of its contributors may be used to endorse or promote products */
/* derived from this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS */
/* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */
/* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY */
/* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Translator AddressInstruction.c */
/* */
/* Primitive Address Parse Class */
/* */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "StringClass.hpp"
#include "RexxActivation.hpp"
#include "AddressInstruction.hpp"
RexxInstructionAddress::RexxInstructionAddress(
RexxObject *expression, /* variable address expression */
RexxString *environment, /* address environment name */
RexxObject *command) /* command to issue */
/******************************************************************************/
/* Function : Complete address instruction initialization */
/******************************************************************************/
{
/* store the instruction state */
OrefSet(this, this->expression, expression);
OrefSet(this, this->environment, environment);
OrefSet(this, this->command, command);
}
void RexxInstructionAddress::live()
/******************************************************************************/
/* Function: Normal garbage collection live marking */
/******************************************************************************/
{
setUpMemoryMark
memory_mark(this->nextInstruction); /* must be first one marked */
memory_mark(this->expression);
memory_mark(this->environment);
memory_mark(this->command);
cleanUpMemoryMark
}
void RexxInstructionAddress::liveGeneral()
/******************************************************************************/
/* Function: Generalized object marking */
/******************************************************************************/
{
setUpMemoryMarkGeneral
/* must be first one marked */
memory_mark_general(this->nextInstruction);
memory_mark_general(this->expression);
memory_mark_general(this->environment);
memory_mark_general(this->command);
cleanUpMemoryMarkGeneral
}
void RexxInstructionAddress::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function: Flatten an object */
/******************************************************************************/
{
setUpFlatten(RexxInstructionAddress)
flatten_reference(newThis->nextInstruction, envelope);
flatten_reference(newThis->expression, envelope);
flatten_reference(newThis->environment, envelope);
flatten_reference(newThis->command, envelope);
cleanUpFlatten
}
void RexxInstructionAddress::execute(
RexxActivation *context, /* current activation context */
RexxExpressionStack *stack ) /* evaluation stack */
/****************************************************************************/
/* Function: Execute a REXX LEAVE instruction */
/****************************************************************************/
{
RexxObject *result; /* expression evaluation result */
RexxString *command; /* command to be issued */
context->traceInstruction(this); /* trace if necessary */
/* is this an address toggle? */
if (this->environment == OREF_NULL && this->expression == OREF_NULL) {
context->toggleAddress(); /* toggle the address settings */
context->pauseInstruction(); /* do debug pause if necessary */
}
/* have a constant address name? */
else if (this->environment != OREF_NULL) {
if (this->command != OREF_NULL) { /* actually the command form? */
/* get the expression value */
result = this->command->evaluate(context, stack);
command = REQUEST_STRING(result);/* force to string form */
context->traceResult(command); /* trace if necessary */
/* validate the address name */
SysValidateAddressName(this->environment);
/* go process the command */
context->command(command, this->environment);
}
else { /* just change the address */
/* validate the address name */
SysValidateAddressName(this->environment);
/* now perform the switch */
context->setAddress(this->environment);
context->pauseInstruction(); /* do debug pause if necessary */
}
}
else { /* we have an ADDRESS VALUE form */
/* get the expression value */
result = this->expression->evaluate(context, stack);
command = REQUEST_STRING(result); /* force to string form */
context->traceResult(command); /* trace if necessary */
SysValidateAddressName(command); /* validate the address name */
context->setAddress(command); /* just change the address */
context->pauseInstruction(); /* do debug pause if necessary */
}
}