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authorBinh-Minh Ribler <bmribler@hdfgroup.org>2006-09-19 04:11:28 (GMT)
committerBinh-Minh Ribler <bmribler@hdfgroup.org>2006-09-19 04:11:28 (GMT)
commitfc4e7f7606c9ab56c63ccb2b9335a6131a438864 (patch)
tree21c5851bead71f95ec5e93742d7090b3d814255f /c++/examples/chunks.cpp
parentb72f6dc8367d406d9c678f62953a75056a37891c (diff)
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[svn-r12672] Purpose: Updating C++ examples
Description: Updated existing C++ examples to be similar to C examples. Platforms tested Linux 2.4 (heping) SunOS 5.9 (shanti) AIX 5.1 (copper)
Diffstat (limited to 'c++/examples/chunks.cpp')
-rw-r--r--c++/examples/chunks.cpp379
1 files changed, 191 insertions, 188 deletions
diff --git a/c++/examples/chunks.cpp b/c++/examples/chunks.cpp
index 783fffa..471acea 100644
--- a/c++/examples/chunks.cpp
+++ b/c++/examples/chunks.cpp
@@ -14,7 +14,7 @@
/*
* This example shows how to read data from a chunked dataset.
- * We will read from the file created by extend.C
+ * We will read from the file created by extend.cpp
*/
#ifdef OLD_HEADER_FILENAME
@@ -46,191 +46,194 @@ const int RANKC = 1;
int main (void)
{
- hsize_t i, j;
-
- // Try block to detect exceptions raised by any of the calls inside it
- try
- {
- /*
- * Turn off the auto-printing when failure occurs so that we can
- * handle the errors appropriately
- */
- Exception::dontPrint();
-
- /*
- * Open the file and the dataset.
- */
- H5File file( FILE_NAME, H5F_ACC_RDONLY );
- DataSet dataset = file.openDataSet( DATASET_NAME );
-
- /*
- * Get filespace for rank and dimension
- */
- DataSpace filespace = dataset.getSpace();
-
- /*
- * Get number of dimensions in the file dataspace
- */
- int rank = filespace.getSimpleExtentNdims();
-
- /*
- * Get and print the dimension sizes of the file dataspace
- */
- hsize_t dims[2]; // dataset dimensions
- rank = filespace.getSimpleExtentDims( dims );
- cout << "dataset rank = " << rank << ", dimensions "
- << (unsigned long)(dims[0]) << " x " << (unsigned long)(dims[1])
- << endl;
-
- /*
- * Get creation properties list.
- */
- DSetCreatPropList cparms = dataset.getCreatePlist();
-
- /*
- * Check if dataset is chunked.
- */
- hsize_t chunk_dims[2];
- int rank_chunk;
- if( H5D_CHUNKED == cparms.getLayout() )
- {
- /*
- * Get chunking information: rank and dimensions
- */
- rank_chunk = cparms.getChunk( 2, chunk_dims);
- cout << "chunk rank " << rank_chunk << "dimensions "
- << (unsigned long)(chunk_dims[0]) << " x "
- << (unsigned long)(chunk_dims[1]) << endl;
- }
-
- /*
- * Define the memory space to read dataset.
- */
- DataSpace mspace1( RANK, dims );
-
- /*
- * Read dataset back and display.
- */
- int data_out[NX][NY]; // buffer for dataset to be read
- dataset.read( data_out, PredType::NATIVE_INT, mspace1, filespace );
- cout << "\n";
- cout << "Dataset: \n";
- for (j = 0; j < dims[0]; j++)
- {
- for (i = 0; i < dims[1]; i++)
- cout << data_out[j][i] << " ";
- cout << endl;
- }
-
- /*
- * dataset rank 2, dimensions 10 x 5
- * chunk rank 2, dimensions 2 x 5
-
- * Dataset:
- * 1 1 1 3 3
- * 1 1 1 3 3
- * 1 1 1 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- * 2 0 0 0 0
- */
-
- /*
- * Read the third column from the dataset.
- * First define memory dataspace, then define hyperslab
- * and read it into column array.
- */
- hsize_t col_dims[1];
- col_dims[0] = 10;
- DataSpace mspace2( RANKC, col_dims );
-
- /*
- * Define the column (hyperslab) to read.
- */
- hsize_t offset[2] = { 0, 2 };
- hsize_t count[2] = { 10, 1 };
- int column[10]; // buffer for column to be read
-
- filespace.selectHyperslab( H5S_SELECT_SET, count, offset );
- dataset.read( column, PredType::NATIVE_INT, mspace2, filespace );
-
- cout << endl;
- cout << "Third column: " << endl;
- for (i = 0; i < 10; i++)
- cout << column[i] << endl;
-
- /*
- * Third column:
- * 1
- * 1
- * 1
- * 0
- * 0
- * 0
- * 0
- * 0
- * 0
- * 0
- */
-
- /*
- * Define the memory space to read a chunk.
- */
- DataSpace mspace3( rank_chunk, chunk_dims );
-
- /*
- * Define chunk in the file (hyperslab) to read.
- */
- offset[0] = 2;
- offset[1] = 0;
- count[0] = chunk_dims[0];
- count[1] = chunk_dims[1];
- filespace.selectHyperslab( H5S_SELECT_SET, count, offset );
-
- /*
- * Read chunk back and display.
- */
- int chunk_out[2][5]; // buffer for chunk to be read
- dataset.read( chunk_out, PredType::NATIVE_INT, mspace3, filespace );
- cout << endl;
- cout << "Chunk:" << endl;
- for (j = 0; j < chunk_dims[0]; j++)
- {
- for (i = 0; i < chunk_dims[1]; i++)
- cout << chunk_out[j][i] << " ";
- cout << endl;
- }
- /*
- * Chunk:
- * 1 1 1 0 0
- * 2 0 0 0 0
- */
- } // end of try block
-
- // catch failure caused by the H5File operations
- catch( FileIException error )
- {
- error.printError();
- return -1;
- }
-
- // catch failure caused by the DataSet operations
- catch( DataSetIException error )
- {
- error.printError();
- return -1;
- }
-
- // catch failure caused by the DataSpace operations
- catch( DataSpaceIException error )
- {
- error.printError();
- return -1;
- }
-
- return 0;
+ hsize_t i, j;
+
+ // Try block to detect exceptions raised by any of the calls inside it
+ try
+ {
+ /*
+ * Turn off the auto-printing when failure occurs so that we can
+ * handle the errors appropriately
+ */
+ Exception::dontPrint();
+
+ /*
+ * Open the file and the dataset.
+ */
+ H5File file( FILE_NAME, H5F_ACC_RDONLY );
+ DataSet dataset = file.openDataSet( DATASET_NAME );
+
+ /*
+ * Get filespace for rank and dimension
+ */
+ DataSpace filespace = dataset.getSpace();
+
+ /*
+ * Get number of dimensions in the file dataspace
+ */
+ int rank = filespace.getSimpleExtentNdims();
+
+ /*
+ * Get and print the dimension sizes of the file dataspace
+ */
+ hsize_t dims[2]; // dataset dimensions
+ rank = filespace.getSimpleExtentDims( dims );
+ cout << "dataset rank = " << rank << ", dimensions "
+ << (unsigned long)(dims[0]) << " x "
+ << (unsigned long)(dims[1]) << endl;
+
+ /*
+ * Define the memory space to read dataset.
+ */
+ DataSpace mspace1(RANK, dims);
+
+ /*
+ * Read dataset back and display.
+ */
+ int data_out[NX][NY]; // buffer for dataset to be read
+ dataset.read( data_out, PredType::NATIVE_INT, mspace1, filespace );
+
+ cout << "\n";
+ cout << "Dataset: \n";
+ for (j = 0; j < dims[0]; j++)
+ {
+ for (i = 0; i < dims[1]; i++)
+ cout << data_out[j][i] << " ";
+ cout << endl;
+ }
+
+ /*
+ * dataset rank 2, dimensions 10 x 5
+ * chunk rank 2, dimensions 2 x 5
+
+ * Dataset:
+ * 1 1 1 3 3
+ * 1 1 1 3 3
+ * 1 1 1 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ * 2 0 0 0 0
+ */
+
+ /*
+ * Read the third column from the dataset.
+ * First define memory dataspace, then define hyperslab
+ * and read it into column array.
+ */
+ hsize_t col_dims[1];
+ col_dims[0] = 10;
+ DataSpace mspace2( RANKC, col_dims );
+
+ /*
+ * Define the column (hyperslab) to read.
+ */
+ hsize_t offset[2] = { 0, 2 };
+ hsize_t count[2] = { 10, 1 };
+ int column[10]; // buffer for column to be read
+
+ /*
+ * Define hyperslab and read.
+ */
+ filespace.selectHyperslab( H5S_SELECT_SET, count, offset );
+ dataset.read( column, PredType::NATIVE_INT, mspace2, filespace );
+
+ cout << endl;
+ cout << "Third column: " << endl;
+ for (i = 0; i < 10; i++)
+ cout << column[i] << endl;
+
+ /*
+ * Third column:
+ * 1
+ * 1
+ * 1
+ * 0
+ * 0
+ * 0
+ * 0
+ * 0
+ * 0
+ * 0
+ */
+
+ /*
+ * Get creation properties list.
+ */
+ DSetCreatPropList cparms = dataset.getCreatePlist();
+
+ /*
+ * Check if dataset is chunked.
+ */
+ hsize_t chunk_dims[2];
+ int rank_chunk;
+ if( H5D_CHUNKED == cparms.getLayout() )
+ {
+ /*
+ * Get chunking information: rank and dimensions
+ */
+ rank_chunk = cparms.getChunk( 2, chunk_dims);
+ cout << "chunk rank " << rank_chunk << "dimensions "
+ << (unsigned long)(chunk_dims[0]) << " x "
+ << (unsigned long)(chunk_dims[1]) << endl;
+
+ /*
+ * Define the memory space to read a chunk.
+ */
+ DataSpace mspace3( rank_chunk, chunk_dims );
+
+ /*
+ * Define chunk in the file (hyperslab) to read.
+ */
+ offset[0] = 2;
+ offset[1] = 0;
+ count[0] = chunk_dims[0];
+ count[1] = chunk_dims[1];
+ filespace.selectHyperslab( H5S_SELECT_SET, count, offset );
+
+ /*
+ * Read chunk back and display.
+ */
+ int chunk_out[2][5]; // buffer for chunk to be read
+ dataset.read( chunk_out, PredType::NATIVE_INT, mspace3, filespace );
+ cout << endl;
+ cout << "Chunk:" << endl;
+ for (j = 0; j < chunk_dims[0]; j++)
+ {
+ for (i = 0; i < chunk_dims[1]; i++)
+ cout << chunk_out[j][i] << " ";
+ cout << endl;
+ }
+ /*
+ * Chunk:
+ * 1 1 1 0 0
+ * 2 0 0 0 0
+ */
+ }
+ } // end of try block
+
+ // catch failure caused by the H5File operations
+ catch( FileIException error )
+ {
+ error.printError();
+ return -1;
+ }
+
+ // catch failure caused by the DataSet operations
+ catch( DataSetIException error )
+ {
+ error.printError();
+ return -1;
+ }
+
+ // catch failure caused by the DataSpace operations
+ catch( DataSpaceIException error )
+ {
+ error.printError();
+ return -1;
+ }
+ return 0;
}