mkl_sparse_?_export

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 12/16/2022

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mkl_sparse_?_export_csc

Exports CSC matrix from internal representation.

Syntax

stat = mkl_sparse_s_export_csc (source, indexing, rows, cols, cols_start, cols_end, row_indx, values)

stat = mkl_sparse_d_export_csc (source, indexing, rows, cols, cols_start, cols_end, row_indx, values)

stat = mkl_sparse_c_export_csc (source, indexing, rows, cols, cols_start, cols_end, row_indx, values)

stat = mkl_sparse_z_export_csc (source, indexing, rows, cols, cols_start, cols_end, row_indx, values)

Include Files

mkl_spblas.f90

Description

If the matrix specified by the source handle is in CSC format, the mkl_sparse_?_export_csc routine exports an m-by-k matrix A in CSC format matrix from the internal representation. The routine returns pointers to the internal representation and does not allocate additional memory.

If the matrix is not already in CSC format, the routine returns SPARSE_STATUS_INVALID_VALUE.

Input Parameters

source

SPARSE_MATRIX_T.

Handle containing internal data.

Output Parameters

indexing

sparse_index_base_t.

Indicates how input arrays are indexed.

`SPARSE_INDEX_BASE_ZERO`	Zero-based (C-style) indexing: indices start at 0.
`SPARSE_INDEX_BASE_ONE`	One-based (Fortran-style) indexing: indices start at 1.

rows

C_INT.

Number of rows of the matrix source.

cols

C_INT.

Number of columns of the matrix source.

cols_start

C_INT.

Array of length m. This array contains column indices, such that cols_start(i) - cols_start(1) is the first index of column i in the arrays values and row_indx.

Refer to pointerb array description in csc Format for more details.

cols_end

C_INT.

Pointer to array of length m. This array contains row indices, such that cols_end(i) - cols_start(1) - 1 is the last index of column i in the arrays values and row_indx.

Refer to pointerE array description in csc Format for more details.

row_indx

C_INT.

For one-based indexing, pointer to array containing the row indices plus one for each non-zero element of the matrix source. For zero-based indexing, pointer to array containing the row indices for each non-zero element of the matrix source. Its length is cols_end(cols - 1) - cols_start(1).

values

C_FLOAT for mkl_sparse_s_export_csc

C_DOUBLE for mkl_sparse_d_export_csc

C_FLOAT_COMPLEX for mkl_sparse_c_export_csc

C_DOUBLE_COMPLEX for mkl_sparse_z_export_csc

Pointer to array containing non-zero elements of the matrix A. Its length is equal to length of the row_indx array.

Refer to values array description in csc Format for more details.

Output Parameters

stat

INTEGER

Value indicating whether the operation was successful or not, and why:

`SPARSE_STATUS_SUCCESS`	The operation was successful.
`SPARSE_STATUS_NOT_INITIALIZED`	The routine encountered an empty handle or matrix array.
`SPARSE_STATUS_ALLOC_FAILED`	Internal memory allocation failed.
`SPARSE_STATUS_INVALID_VALUE`	The input parameters contain an invalid value.
`SPARSE_STATUS_EXECUTION_FAILED`	Execution failed.
`SPARSE_STATUS_INTERNAL_ERROR`	An error in algorithm implementation occurred.
`SPARSE_STATUS_NOT_SUPPORTED`	The requested operation is not supported.

Parent topic: Matrix Manipulation Routines

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

mkl_sparse_?_export_csc