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/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* 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
*
* Module: interpreter.h
*/
/*
* Change History:
*
* 6/2001 B. Rafanello Initial version.
*
*/
#ifndef INTERPRETER_H
#define INTERPRETER_H 1
#include "dlist.h"
#include "frontend.h"
/* Define a typecode for use with the dlist module. */
#define STACK_NODE 94393920
/* The interpreter takes in a tree consisting of nodes as defined below and executes them, returning the result. */
typedef enum {
StringData,
IntegerData,
RealNumberData,
Units_Node,
Precision_Node,
Allocate_Node,
Assign_Node,
Check_Node,
Create_Node,
Defragment_Node,
Delete_Node,
Expand_Node,
Format_Node,
Unformat_Node,
Shrink_Node,
Set_Node,
Remove_Node,
Rename_Node,
Revert_Node,
Query_Node,
Query_Node_Type_2,
Query_Extended_Info,
Help_Node,
Task_Adjust,
Topmost_Objects,
Filter,
Freespace_Size_Filter,
Feature_ID,
Feature_Name,
Plugin_ID,
Plugin_Name,
Plugin_Mask,
Probe_Node,
Name_Value_Pair,
ObjectList,
Name_To_Volume_Handle,
Name_To_Object_Handle,
Name_To_Region_Handle,
Name_To_Container_Handle,
Name_To_Segment_Handle,
Name_To_Disk_Handle,
Name_To_Plugin_Handle,
Translate_Name_To_Handle
} NodeTypes;
typedef struct {
NodeTypes NodeType;
void * NodeValue;
dlist_t Children;
} Executable_Node;
#ifndef DEBUG_PARSER
/*--------------------------------------------------
* Public Global Variables
--------------------------------------------------*/
#ifdef INTERPRETER_C
int Verbose_Mode = 0; /* 0 = no verbose, 1 = EVMS Engine messages reported one per line, 2 = EVMS Engine messages overlayed on top of each other. */
#else
extern int Verbose_Mode;
#endif
/*********************************************************************/
/* */
/* Function Name: Interpret_Commands */
/* */
/* Descriptive Name: Takes a dlist_t of commands, where each command */
/* is represented as a tree of Executable_Node */
/* entities, and attempts to interpret them, */
/* thereby executing the command they represent. */
/* */
/* Input: dlist_t Commands - A list of tree structures, where each */
/* tree structure is composed of nodes of */
/* type Executable_Node. Each tree */
/* represents a command to execute. */
/* Global_Commit - if TRUE, then a single commit will be */
/* performed after all commands in Commands */
/* have been processed. */
/* Interactive - If TRUE, then we are not processing a */
/* command file and the Probe command (which */
/* translates to an evms_rediscover() call) */
/* and other commands not allowed in command */
/* files are allowed. */
/* Debug - The debug level to use as specified by the user. */
/* */
/* Output: The function return value is 0 if no errors occurred, */
/* a non-zero return value otherwise. */
/* */
/* Error Handling: */
/* */
/* Side Effects: The state of the EVMS engine may be altered by the*/
/* commands being interpreted by this function. This*/
/* may lead to modifications of the volumes in the */
/* system. */
/* */
/* Notes: */
/* */
/*********************************************************************/
int Interpret_Commands(dlist_t Commands, BOOLEAN Global_Commit, BOOLEAN Interactive, debug_level_t Debug);
/*********************************************************************/
/* */
/* Function Name: Commit_Changes */
/* */
/* Descriptive Name: If any changes have been made but not yet */
/* written to disk, then this function will */
/* cause them to be written to disk. This is a */
/* wrapper for the evms_commit_changes function. */
/* */
/* Input: None. */
/* */
/* Output: The function return value is 0 if no errors occurred, */
/* a non-zero return value otherwise. This function will */
/* print the status messages returned by the EVMS Engine */
/* during the commit process. */
/* */
/* Error Handling: */
/* */
/* Side Effects: This function will cause the EVMS engine to write */
/* any pending changes to disk. */
/* */
/* Notes: */
/* */
/*********************************************************************/
int Commit_Changes(void);
#endif
#endif
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