source: python/lib/gio.h @ bd84570

Revision bd84570, 3.3 KB checked in by Hal Finkel <hfinkel@…>, 8 years ago (diff)

Add simple python interface from Dan

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[bd84570]1/*
2 *                    Copyright (C) 2015, UChicago Argonne, LLC
3 *                               All Rights Reserved
4 *
5 *                               Generic IO (ANL-15-066)
6 *                     Hal Finkel, Argonne National Laboratory
7 *
8 *                              OPEN SOURCE LICENSE
9 *
10 * Under the terms of Contract No. DE-AC02-06CH11357 with UChicago Argonne,
11 * LLC, the U.S. Government retains certain rights in this software.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 *
16 *   1. Redistributions of source code must retain the above copyright notice,
17 *      this list of conditions and the following disclaimer.
18 *
19 *   2. Redistributions in binary form must reproduce the above copyright
20 *      notice, this list of conditions and the following disclaimer in the
21 *      documentation and/or other materials provided with the distribution.
22 *
23 *   3. Neither the names of UChicago Argonne, LLC or the Department of Energy
24 *      nor the names of its contributors may be used to endorse or promote
25 *      products derived from this software without specific prior written
26 *      permission.
27 *
28 * *****************************************************************************
29 *
30 *                                  DISCLAIMER
31 * THE SOFTWARE IS SUPPLIED “AS IS” WITHOUT WARRANTY OF ANY KIND.  NEITHER THE
32 * UNTED STATES GOVERNMENT, NOR THE UNITED STATES DEPARTMENT OF ENERGY, NOR
33 * UCHICAGO ARGONNE, LLC, NOR ANY OF THEIR EMPLOYEES, MAKES ANY WARRANTY,
34 * EXPRESS OR IMPLIED, OR ASSUMES ANY LEGAL LIABILITY OR RESPONSIBILITY FOR THE
35 * ACCURACY, COMPLETENESS, OR USEFULNESS OF ANY INFORMATION, DATA, APPARATUS,
36 * PRODUCT, OR PROCESS DISCLOSED, OR REPRESENTS THAT ITS USE WOULD NOT INFRINGE
37 * PRIVATELY OWNED RIGHTS.
38 *
39 * *****************************************************************************
40 */
41
42#include <GenericIO.h>
43
44#include <stdint.h>
45#include <sstream>
46
47template <class T>
48void read_gio(char* file_name, std::string var_name, T*& data){
49  gio::GenericIO reader(file_name);
50  reader.openAndReadHeader(gio::GenericIO::MismatchAllowed);
51  int num_ranks = reader.readNRanks();
52  uint64_t max_size = 0;
53  uint64_t rank_size[num_ranks];
54  for(int i =0;i<num_ranks;++i){
55    rank_size[i] = reader.readNumElems(i);
56    if(max_size < rank_size[i])
57      max_size = rank_size[i];
58  }
59  T* rank_data = new T[max_size+reader.requestedExtraSpace()/sizeof(T)];
60  int64_t offset =0;
61  reader.addVariable(var_name,rank_data,true);
62  for(int i=0;i<num_ranks;++i){
63    reader.readData(i,false);
64    std::copy(rank_data,rank_data+rank_size[i],data+offset);
65    offset +=rank_size[i];
66  }
67  delete [] rank_data;
68  reader.close();
69}
70extern "C" int64_t get_elem_num(char* file_name);
71
72extern "C" void read_gio_float (char* file_name, char* var_name, float* data);
73extern "C" void read_gio_double(char* file_name, char* var_name, double* data);
74extern "C" void read_gio_int32 (char* file_name, char* var_name, int* data); 
75extern "C" void read_gio_int64 (char* file_name, char* var_name, int64_t* data);
76enum var_type{
77  float_type=0,
78  double_type=1,
79  int32_type=2,
80  int64_type=3,
81  type_not_found=9,
82  var_not_found=10
83};
84extern "C" var_type get_variable_type(char* file_name,char* var_name);
85extern "C" void inspect_gio(char* file_name);
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