libfru/libfru/Parser.cc

	Parser.cc revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2000 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <pthread.h>
#include <string.h>
#include <stdlib.h>

#include "Parser.h"

// yacc symbols
int fruparse(void);
extern int frudebug;

// global data to/from the lexer
pthread_mutex_t gParserLock;
fru_errno_t gParserErrno = FRU_SUCCESS;
char *gParserString = NULL;
Ancestor *gParserAnts   = NULL;
PathDef *gParserHead   = NULL;
int *gParserAbs    = NULL;

// returns a NULL terminated list of PathDef objects.
// and a NULL terminated list of ancestor objects this path exists in
// NOTE: ancestors may be NULL if no tags contain a valid path.
fru_errno_t
fru_field_parser(const char *path, Ancestor **ancestors,
    int *absolute, PathDef **pathDef)
{
    // lock up the globals for the parser...
    pthread_mutex_lock(&gParserLock);

    // get out a string for the parser to play with.
    gParserString = strdup(path);
    if (gParserString == NULL) {
        pthread_mutex_unlock(&gParserLock);
        return (FRU_FAILURE);
    }
    // save the head pointer for delete.
    char *delPtr = gParserString;

    // frudebug = 1;

    // set up for return data from lexer.
    gParserHead = NULL;
    gParserAnts = NULL;
    gParserErrno = FRU_SUCCESS;
    gParserAbs = absolute;
    *gParserAbs = 0;

    int rc = fruparse();

    // clean up the string we used for yacc.
    free(delPtr);
    gParserString = NULL;

    // frudebug = 0;
    if (rc != 0) {
        delete gParserHead;
        delete gParserAnts;
        fru_errno_t err = gParserErrno;
        pthread_mutex_unlock(&gParserLock);
        return (err);
    }

    /* if ((gParserHead == NULL) || (gParserAnts == NULL)) { */
    /* allow ancestors to be NULL */
    /* some elements don't have tagged ancestors */
    if (gParserHead == NULL) {
        delete gParserAnts;
        pthread_mutex_unlock(&gParserLock);
        return (FRU_FAILURE);
    }

    *pathDef = gParserHead;
    *ancestors = gParserAnts;

    pthread_mutex_unlock(&gParserLock);
    return (FRU_SUCCESS);
}