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DCGroup.cpp
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DCGroup.cpp
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/**
* Copyright 2013 Felix Schmitt
* 2015 Carlchristian Eckert
*
* This file is part of libSplash.
*
* libSplash is free software: you can redistribute it and/or modify
* it under the terms of of either the GNU General Public License or
* the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* libSplash 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 and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with libSplash.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include <sstream>
#include <cassert>
#include <string.h>
#include <typeinfo>
#include "splash/core/DCGroup.hpp"
#include "splash/basetypes/basetypes.hpp"
#include <splash/basetypes/generateCollectionType.hpp>
#define H5_TRUE 1
#define H5_FALSE 0
namespace splash
{
std::string DCGroup::getExceptionString(std::string msg, std::string name)
{
return (std::string("Exception for DCGroup [") + name + std::string("] ") +
msg);
}
DCGroup::DCGroup() :
checkExistence(true)
{
}
DCGroup::~DCGroup()
{
close();
}
H5Handle DCGroup::create(H5Handle base, std::string path)
throw (DCException)
{
bool mustCreate = false;
H5Handle currentHandle = base;
char c_path[path.size() + 1];
strcpy(c_path, path.c_str());
char *token = strtok(c_path, "/");
while (token)
{
if (mustCreate || !H5Lexists(currentHandle, token, H5P_DEFAULT))
{
H5Handle newHandle = H5Gcreate(currentHandle, token, H5P_LINK_CREATE_DEFAULT,
H5P_GROUP_CREATE_DEFAULT, H5P_GROUP_ACCESS_DEFAULT);
if (newHandle < 0)
throw DCException(getExceptionString("Failed to create group", path));
currentHandle = newHandle;
mustCreate = true;
} else
{
currentHandle = H5Gopen(currentHandle, token, H5P_DEFAULT);
if (currentHandle < 0)
{
if (checkExistence)
throw DCException(getExceptionString("Failed to create group", path));
currentHandle = H5Gcreate(currentHandle, token, H5P_LINK_CREATE_DEFAULT,
H5P_GROUP_CREATE_DEFAULT, H5P_GROUP_ACCESS_DEFAULT);
if (currentHandle < 0)
throw DCException(getExceptionString("Failed to create group", path));
mustCreate = true;
}
}
handles.push_back(currentHandle);
token = strtok(NULL, "/");
}
return currentHandle;
}
H5Handle DCGroup::open(H5Handle base, std::string path)
throw (DCException)
{
H5Handle newHandle;
if (checkExistence && !H5Lexists(base, path.c_str(), H5P_DEFAULT))
throw DCException(getExceptionString("Failed to open group", path));
newHandle = H5Gopen(base, path.c_str(), H5P_DEFAULT);
if (newHandle < 0)
throw DCException(getExceptionString("Failed to open group", path));
handles.push_back(newHandle);
return newHandle;
}
H5Handle DCGroup::openCreate(H5Handle base, std::string path)
throw (DCException)
{
if (checkExistence && exists(base, path))
return open(base, path);
else
return create(base, path);
}
void DCGroup::close()
throw (DCException)
{
for (HandlesList::const_reverse_iterator iter = handles.rbegin();
iter != handles.rend(); ++iter)
{
if (H5Gclose(*iter) < 0)
throw DCException(getExceptionString("Failed to close group", ""));
}
handles.clear();
}
bool DCGroup::exists(H5Handle base, std::string path)
{
return (H5Lexists(base, path.c_str(), H5P_DEFAULT) == H5_TRUE);
}
void DCGroup::remove(H5Handle base, std::string path)
throw (DCException)
{
if (H5Ldelete(base, path.c_str(), H5P_LINK_ACCESS_DEFAULT) < 0)
throw DCException(getExceptionString("failed to remove group", path));
}
H5Handle DCGroup::getHandle()
{
if (handles.size() > 0)
return *(handles.rbegin());
else
return INVALID_HANDLE;
}
void DCGroup::getEntriesInternal(H5Handle base, const std::string baseGroup,
std::string baseName, VisitObjCBType *param)
throw (DCException)
{
H5G_info_t group_info;
H5Gget_info(base, &group_info);
for (size_t i = 0; i < group_info.nlinks; ++i)
{
std::string currentBaseName = baseName;
std::string currentEntryName = "";
H5O_info_t obj_info;
H5Oget_info_by_idx(base, ".", H5_INDEX_NAME, H5_ITER_INC, i, &obj_info, H5P_DEFAULT);
if (param->entries)
{
ssize_t len_name = H5Lget_name_by_idx(base, ".", H5_INDEX_NAME,
H5_ITER_INC, i, NULL, 0, H5P_LINK_ACCESS_DEFAULT);
char *link_name_c = new char[len_name + 1];
H5Lget_name_by_idx(base, ".", H5_INDEX_NAME,
H5_ITER_INC, i, link_name_c, len_name + 1, H5P_LINK_ACCESS_DEFAULT);
currentEntryName = std::string(link_name_c);
if (obj_info.type == H5O_TYPE_GROUP)
{
currentEntryName += std::string("/");
}
currentBaseName += currentEntryName;
delete[] link_name_c;
}
if (obj_info.type == H5O_TYPE_GROUP)
{
hid_t group_id = H5Oopen_by_idx(base, ".", H5_INDEX_NAME, H5_ITER_INC, i, H5P_DEFAULT);
getEntriesInternal(group_id, baseGroup, currentBaseName, param);
H5Oclose(group_id);
}
if (obj_info.type == H5O_TYPE_DATASET)
{
if (param->entries)
{
param->entries[param->count].name = currentBaseName;
hid_t dataset_id = H5Oopen_by_idx(base, ".", H5_INDEX_NAME, H5_ITER_INC, i, H5P_DEFAULT);
hid_t datatype_id = H5Dget_type(dataset_id);
param->entries[param->count].colType = generateCollectionType(datatype_id);
H5Dclose(datatype_id);
H5Oclose(dataset_id);
}
param->count++;
}
}
}
}