Mesh Oriented datABase  (version 5.5.1)
An array-based unstructured mesh library
file-handle.c
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1 /**
2  * MOAB, a Mesh-Oriented datABase, is a software component for creating,
3  * storing and accessing finite element mesh data.
4  *
5  * Copyright 2004 Sandia Corporation. Under the terms of Contract
6  * DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government
7  * retains certain rights in this software.
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  */
15 
16 #include <stdlib.h>
17 #include <string.h>
18 #include <H5Ipublic.h>
19 #include <H5Tpublic.h>
20 #include "file-handle.h"
21 #include "status.h"
22 #include "util.h"
23 
24 #define FILE_HANDLE_MAGIC 0xFEEDFEED
25 
26 int mhdf_check_valid_file( FileHandle* handle, mhdf_Status* status )
27 {
28  if( !handle )
29  {
30  mhdf_setFail( status, "NULL file handle." );
31  return 0;
32  }
33 
34  if( handle->magic != FILE_HANDLE_MAGIC )
35  {
36  mhdf_setFail( status, "Invalid file handle." );
37  return 0;
38  }
39 
40  return 1;
41 }
42 
43 FileHandle* mhdf_alloc_FileHandle( hid_t hdf_table, hid_t id_type, mhdf_Status* status )
44 {
45  FileHandle* rval;
46 
47  /* check that id_type is sane */
48  if( id_type == -1 )
49  {
50  id_type = H5T_NATIVE_ULONG;
51  }
52  else if( H5T_INTEGER != H5Tget_class( id_type ) )
53  {
54  mhdf_setFail( status, "Invalid ID type: not integer class" );
55  return 0;
56  }
57 
58  rval = (FileHandle*)mhdf_malloc( sizeof( FileHandle ), status );
59  if( !rval ) return NULL;
60 
61  rval->magic = FILE_HANDLE_MAGIC;
62  rval->hdf_handle = hdf_table;
63  rval->open_handle_count = 0;
64  rval->id_type = id_type;
65  rval->max_id = 0L;
66  return rval;
67 }