usr/src/lib/libfru/libfru/Parser.cc

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <pthread.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32
  33 #include "Parser.h"
  34
  35 // yacc symbols
  36 int fruparse(void);
  37 extern int frudebug;
  38
  39 // global data to/from the lexer
  40 pthread_mutex_t gParserLock;
  41 fru_errno_t gParserErrno = FRU_SUCCESS;
  42 char *gParserString = NULL;
  43 Ancestor *gParserAnts   = NULL;
  44 PathDef *gParserHead   = NULL;
  45 int *gParserAbs    = NULL;
  46
  47 // returns a NULL terminated list of PathDef objects.
  48 // and a NULL terminated list of ancestor objects this path exists in
  49 // NOTE: ancestors may be NULL if no tags contain a valid path.
  50 fru_errno_t
  51 fru_field_parser(const char *path, Ancestor **ancestors,
  52         int *absolute, PathDef **pathDef)
  53 {
  54         // lock up the globals for the parser...
  55         pthread_mutex_lock(&gParserLock);
  56
  57         // get out a string for the parser to play with.
  58         gParserString = strdup(path);
  59         if (gParserString == NULL) {
  60                 pthread_mutex_unlock(&gParserLock);
  61                 return (FRU_FAILURE);
  62         }
  63         // save the head pointer for delete.
  64         char *delPtr = gParserString;
  65
  66         // frudebug = 1;
  67
  68         // set up for return data from lexer.
  69         gParserHead = NULL;
  70         gParserAnts = NULL;
  71         gParserErrno = FRU_SUCCESS;
  72         gParserAbs = absolute;
  73         *gParserAbs = 0;
  74
  75         int rc = fruparse();
  76
  77         // clean up the string we used for yacc.
  78         free(delPtr);
  79         gParserString = NULL;
  80
  81         // frudebug = 0;
  82         if (rc != 0) {
  83                 delete gParserHead;
  84                 delete gParserAnts;
  85                 fru_errno_t err = gParserErrno;
  86                 pthread_mutex_unlock(&gParserLock);
  87                 return (err);
  88         }
  89
  90         /* if ((gParserHead == NULL) || (gParserAnts == NULL)) { */
  91         /* allow ancestors to be NULL */
  92         /* some elements don't have tagged ancestors */
  93         if (gParserHead == NULL) {
  94                 delete gParserAnts;
  95                 pthread_mutex_unlock(&gParserLock);
  96                 return (FRU_FAILURE);
  97         }
  98
  99         *pathDef = gParserHead;
 100         *ancestors = gParserAnts;
 101
 102         pthread_mutex_unlock(&gParserLock);
 103         return (FRU_SUCCESS);
 104 }